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Repository: KilledByAPixel/SpaceHuggers
Branch: main
Commit: bdabe47ffb98
Files: 23
Total size: 224.3 KB
Directory structure:
gitextract_bxe1a8ta/
├── LICENSE
├── README.md
├── app.js
├── appCharacters.js
├── appEffects.js
├── appLevel.js
├── appObjects.js
├── engine/
│ ├── build/
│ │ ├── build.bat
│ │ ├── build.html
│ │ ├── engineBuild.js
│ │ ├── index.html
│ │ └── setupBuild.bat
│ ├── engine.js
│ ├── engineAudio.js
│ ├── engineDebug.js
│ ├── engineDraw.js
│ ├── engineInput.js
│ ├── engineObject.js
│ ├── engineParticle.js
│ ├── engineTileLayer.js
│ ├── engineUtil.js
│ └── engineWebGL.js
└── index.html
================================================
FILE CONTENTS
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FILE: LICENSE
================================================
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
================================================
FILE: README.md
================================================
The empire is spreading like a plague across the galaxy and building outposts on remote planets.
You are an elite rebel soldier tasked with wiping out those bases.
Explore strange planets using your tools of destruction and eliminate the invaders!
You have only 10 clones left, 3 more will be replenished after each mission.
Good luck, have fun, and give space a hug for me.
## This game is only for learning purposes and not intended to be redistributed!
# [PLAY SPACE HUGGERS!](https://www.newgrounds.com/portal/view/819609)
# [OFFICIAL JS13K BUILD](https://js13kgames.com/entries/space-huggers)
# [VIDEO DEMO](https://www.youtube.com/watch?v=6VXrnk18Z4s)
# How To Play
- Use WASD or D-Pad - Move, jump, and climb
- Z or Left click - Shoot - Most things will break, some will burn
- X or Middle click - Roll - brief invulnerability, does damage, gives a boost, puts out fire
- C or Right click - Grenade - 3 per life, use wisely
- You can also use a Xbox or SNES style controller, connect up to 4 for co-op play!
- Kill all enemies to complete the level
- A radar along the bottom of the screen shows nearby enemies
- You start with 10 lives and get 3 more for completing each level
- For an optimal play experience please use Chrome in full screen mode
- There is no end, but for a challenge, try beating the first 5 levels
# Gameplay Tips
- Roll to put out fire!
- Rolling also does melee damage to enemies
- Keep your distance from the specialists (white), they roll and flip often!
- You can hold down jump to climb up walls
- Jump flip to get more vertical height (roll immediately after jumping)
- To reach really high places try a grenade jump!
- You can press R to restart the game
# Game Features
- Run and gun / roguelike hybrid gameplay
- 2-4 player jump in local co-op mode
- Procedural level generation of great variety and complexity
- Levels are fully destructible with persistence
- Fire propagation and explosion system
- 5 enemy types with a larger variant
- 7 different crate/barrel/rock types
- 17 sprite textures using a 12 color palette
- Checkpoints can be captured for players to respawn there
- Multi layer procedurally generated parallax background
- Starfield simulation with moving stars, planets, and suns
- Particle systems for rain, snow, blood, explosions, weapons, water and more
- Native resolution rendering up to 1920x1200
- 11 different sound effects with [ZzFX](https://github.com/KilledByAPixel/ZzFX)
- Up to 4 player co-op with 4 gamepads!
# Engine Features
- Custom game engine written during the compo is separate from game code
- Super fast rendering system for up to 50,000 objects at 60 fps
- Physics engine for axis aligned bounding box rigid body dynamics
- Tile based rendering and collision system
- Particle effects system
- Input processing system for keyboard, mouse, gamepads, and touch
- Math library with Vector2, Color and Timer utility classes
- Audio with ZzFX has ability to attenuate sounds by distance
- Debug visualization system not in JS13K build. (press ~ to enter debug mode)
# Enemy Types
- Recruit (Green) - A bit shorter, more hesitant, takes only 1 hit
- Soldier (Blue) - Average height and ability, takes 2 hits
- Captain (Red) - Can climb walls and jumps more often, takes 3 hits
- Specialist (White) - Jumps and rolls often, they are ninjas, takes 4 hits
- Demolitions Expert (Purple) - Throws grenades and can't catch fire, takes 5 hits
- Small chance of a heavy weapons variation that has double health and fires full auto
# Object Types
- Plastic Crate (Brown) - Burns easily and breaks when fully burnt
- Metal Crate & Barrel (Gray) - Is hard to destroy, can't burn
- Water Barrel (Blue) - Puts out fires and pushes away objects
- Explosive Crate & Barrel (Green) - Burns and explodes after a few seconds
- High Explosive Barrel (Red) - Explodes quickly and much larger than normal explosives
- Rock (Color Varies) - Heavy and very hard to destroy, can't burn, can crush enemies
- Lava Rock (Glowing Red & Orange) - Anything that touches it is lit on fire
# Tools Used
- [Roadroller](https://github.com/lifthrasiir/roadroller)
- [Google Closure Compiler](https://github.com/google/closure-compiler)
- [UglifyJS](https://github.com/mishoo/UglifyJS)
- [Imagemin](https://github.com/imagemin/imagemin)
- [Efficient Compression Tool](https://github.com/fhanau/Efficient-Compression-Tool)
- [Advzip](https://www.npmjs.com/package/advzip-bin)
- [ZzFX](https://github.com/KilledByAPixel/ZzFX)
# How to build the 13k Zip
- Run engine\build\setupBuild.bat to install the necessary tools via npm
- You will need: google-closure-compiler, uglify, roadroller, imagemin-cli, and advzip
- Run engine\build\build.bat, to build app.zip which is the final result
- It will also create a file called index.min.html you can use for testing
- The zip size may vary by 20 bytes or so due to randomness of roadroller
================================================
FILE: app.js
================================================
/*
Javascript Space Game
By Frank Force 2021
*/
'use strict';
const clampCamera = !debug;
const lowGraphicsSettings = glOverlay = !window['chrome']; // only chromium uses high settings
const startCameraScale = 4*16;
const defaultCameraScale = 4*16;
const maxPlayers = 4;
const team_none = 0;
const team_player = 1;
const team_enemy = 2;
let updateWindowSize, renderWindowSize, gameplayWindowSize;
engineInit(
///////////////////////////////////////////////////////////////////////////////
()=> // appInit
{
resetGame();
cameraScale = startCameraScale;
},
///////////////////////////////////////////////////////////////////////////////
()=> // appUpdate
{
const cameraSize = vec2(mainCanvas.width, mainCanvas.height).scale(1/cameraScale);
renderWindowSize = cameraSize.add(vec2(5));
gameplayWindowSize = vec2(mainCanvas.width, mainCanvas.height).scale(1/defaultCameraScale);
updateWindowSize = gameplayWindowSize.add(vec2(30));
//debugRect(cameraPos, maxGameplayCameraSize);
//debugRect(cameraPos, updateWindowSize);
if (debug)
{
randSeeded(randSeeded(randSeeded(randSeed = Date.now()))); // set random seed for debug mode stuf
if (keyWasPressed(81))
new Enemy(mousePosWorld);
if (keyWasPressed(84))
{
//for(let i=30;i--;)
new Prop(mousePosWorld);
}
if (keyWasPressed(69))
explosion(mousePosWorld);
if (keyIsDown(89))
{
let e = new ParticleEmitter(mousePosWorld);
// test
e.collideTiles = 1;
//e.tileIndex=7;
e.emitSize = 2;
e.colorStartA = new Color(1,1,1,1);
e.colorStartB = new Color(0,1,1,1);
e.colorEndA = new Color(0,0,1,0);
e.colorEndB = new Color(0,.5,1,0);
e.emitConeAngle = .1;
e.particleTime = 1
e.speed = .3
e.elasticity = .1
e.gravityScale = 1;
//e.additive = 1;
e.angle = -PI;
}
if (mouseWheel) // mouse zoom
cameraScale = clamp(cameraScale*(1-mouseWheel/10), defaultTileSize.x*16, defaultTileSize.x/16);
//if (keyWasPressed(77))
// playSong([[[,0,219,,,,,1.1,,-.1,-50,-.05,-.01,1],[2,0,84,,,.1,,.7,,,,.5,,6.7,1,.05]],[[[0,-1,1,0,5,0],[1,1,8,8,0,3]]],[0,0,0,0],90]) // music test
if (keyWasPressed(77))
players[0].pos = mousePosWorld;
/*if (keyWasPressed(32))
{
skyParticles && skyParticles.destroy();
tileLayer.destroy();
tileBackgroundLayer.destroy();
tileParallaxLayers.forEach((tileParallaxLayer)=>tileParallaxLayer.destroy());
randomizeLevelParams();
applyArtToLevel();
}*/
if (keyWasPressed(78))
nextLevel();
}
// restart if no lives left
let minDeadTime = 1e3;
for(const player of players)
minDeadTime = min(minDeadTime, player && player.isDead() ? player.deadTimer.get() : 0);
if (minDeadTime > 3 && (keyWasPressed(90) || keyWasPressed(32) || gamepadWasPressed(0)) || keyWasPressed(82))
resetGame();
if (levelEndTimer.get() > 3)
nextLevel();
},
///////////////////////////////////////////////////////////////////////////////
()=> // appUpdatePost
{
if (players.length == 1)
{
const player = players[0];
if (!player.isDead())
cameraPos = cameraPos.lerp(player.pos, clamp(player.getAliveTime()/2));
}
else
{
// camera follows average pos of living players
let posTotal = vec2();
let playerCount = 0;
let cameraOffset = 1;
for(const player of players)
{
if (player && !player.isDead())
{
++playerCount;
posTotal = posTotal.add(player.pos.add(vec2(0,cameraOffset)));
}
}
if (playerCount)
cameraPos = cameraPos.lerp(posTotal.scale(1/playerCount), .2);
}
// spawn players if they don't exist
for(let i = maxPlayers;i--;)
{
if (!players[i] && (gamepadWasPressed(0, i)||gamepadWasPressed(1, i)))
{
++playerLives;
new Player(checkpointPos, i);
}
}
// clamp to bottom and sides of level
if (clampCamera)
{
const w = mainCanvas.width/2/cameraScale+1;
const h = mainCanvas.height/2/cameraScale+2;
cameraPos.y = max(cameraPos.y, h);
if (w*2 < tileCollisionSize.x)
cameraPos.x = clamp(cameraPos.x, tileCollisionSize.x - w, w);
}
updateParallaxLayers();
updateSky();
},
///////////////////////////////////////////////////////////////////////////////
()=> // appRender
{
const gradient = mainContext.createLinearGradient(0,0,0,mainCanvas.height);
gradient.addColorStop(0,levelSkyColor.rgba());
gradient.addColorStop(1,levelSkyHorizonColor.rgba());
mainContext.fillStyle = gradient;
//mainContext.fillStyle = levelSkyColor.rgba();
mainContext.fillRect(0,0,mainCanvas.width, mainCanvas.height);
drawStars();
},
///////////////////////////////////////////////////////////////////////////////
()=> // appRenderPost
{
//let minAliveTime = 9;
//for(const player of players)
// minAliveTime = min(minAliveTime, player.getAliveTime());
//const livesPercent = percent(minAliveTime, 5, 4)
//const s = 8;
//const offset = 100*livesPercent;
//mainContext.drawImage(tileImage, 32, 8, s, s, 32, mainCanvas.height-90, s*9, s*9);
mainContext.textAlign = 'center';
const p = percent(gameTimer.get(), 8, 10);
//mainContext.globalCompositeOperation = 'difference';
mainContext.fillStyle = new Color(0,0,0,p).rgba();
if (p > 0)
{
//mainContext.fillStyle = (new Color).setHSLA(time/3,1,.5,p).rgba();
mainContext.font = '1.5in impact';
mainContext.fillText('SPACE HUGGERS', mainCanvas.width/2, 140);
}
mainContext.font = '.5in impact';
p > 0 && mainContext.fillText('A JS13K Game by Frank Force',mainCanvas.width/2, 210);
// check if any enemies left
let enemiesCount = 0;
for (const o of engineCollideObjects)
{
if (o.isCharacter && o.team == team_enemy)
{
++enemiesCount;
const pos = vec2(mainCanvas.width/2 + (o.pos.x - cameraPos.x)*30,mainCanvas.height-20);
drawRectScreenSpace(pos, o.size.scale(20), o.color.scale(1,.6));
}
}
if (!enemiesCount && !levelEndTimer.isSet())
levelEndTimer.set();
mainContext.fillStyle = new Color(0,0,0).rgba();
mainContext.fillText('Level ' + level + ' Lives ' + playerLives + ' Enemies ' + enemiesCount, mainCanvas.width/2, mainCanvas.height-40);
// fade in level transition
const fade = levelEndTimer.isSet() ? percent(levelEndTimer.get(), 3, 1) : percent(levelTimer.get(), .5, 2);
drawRect(cameraPos, vec2(1e3), new Color(0,0,0,fade))
});
================================================
FILE: appCharacters.js
================================================
/*
Javascript Space Game
By Frank Force 2021
*/
'use strict';
const aiEnable = 1;
const debugAI = 0;
const maxCharacterSpeed = .2;
class Character extends GameObject
{
constructor(pos, sizeScale = 1)
{
super(pos, vec2(.6,.95).scale(sizeScale), 32);
this.health = this.healthMax = this.canBurn = this.isCharacter = 1;
this.sizeScale = sizeScale;
this.groundTimer = new Timer;
this.jumpTimer = new Timer;
this.pressedJumpTimer = new Timer;
this.preventJumpTimer = new Timer;
this.dodgeTimer = new Timer;
this.dodgeRechargeTimer = new Timer;
this.deadTimer = new Timer;
this.blinkTimer = new Timer;
this.moveInput = vec2();
this.extraAdditiveColor = new Color(0,0,0,0);
this.color = new Color;
this.eyeColor = new Color;
this.bodyTile = 3;
this.headTile = 2;
this.renderOrder = 10;
this.overkill = this.grenadeCount = this.walkCyclePercent = 0;
this.grendeThrowTimer = new Timer;
this.setCollision();
}
update()
{
this.lastPos = this.pos.copy();
this.gravityScale = 1; // reset default gravity (incase climbing ladder)
if (this.isDead() || !this.inUpdateWindow() && !this.persistent)
{
super.update();
return; // ignore offscreen objects
}
let moveInput = this.moveInput.copy();
// allow grabbing ladder at head or feet
let touchingLadder = 0;
for(let y=2;y--;)
{
const testPos = this.pos.add(vec2(0, y + .1*this.moveInput.y - this.size.y*.5));
const collisionData = getTileCollisionData(testPos);
touchingLadder |= collisionData == tileType_ladder;
}
if (!touchingLadder)
this.climbingLadder = 0;
else if (this.moveInput.y)
this.climbingLadder = 1;
if (this.dodgeTimer.active())
{
// update roll
this.angle = this.getMirrorSign(2*PI*this.dodgeTimer.getPercent());
if (this.groundObject)
this.velocity.x += this.getMirrorSign(.1);
// apply damage to enemies when rolling
forEachObject(this.pos, this.size, (o)=>
{
if (o.isCharacter && o.team != this.team && !o.isDead())
o.damage(1, this);
});
}
else
this.angle = 0;
if (this.climbingLadder)
{
this.gravityScale = this.climbingWall = this.groundObject = 0;
this.jumpTimer.unset();
this.groundTimer.unset();
this.velocity = this.velocity.multiply(vec2(.85)).add(vec2(0,.02*moveInput.y));
const delta = (this.pos.x|0)+.5 - this.pos.x;
this.velocity.x += .02*delta*abs(moveInput.x ? 0:moveInput.y);
moveInput.x *= .2;
// exit ladder if ground is below
this.climbingLadder = moveInput.y >= 0 || getTileCollisionData(this.pos.subtract(vec2(0,1))) <= 0;
}
else
{
// update jumping and ground check
if (this.groundObject || this.climbingWall)
this.groundTimer.set(.1);
if (this.groundTimer.active() && !this.dodgeTimer.active())
{
// is on ground
if (this.pressedJumpTimer.active()
&& !this.jumpTimer.active()
&& !this.preventJumpTimer.active())
{
// start jump
if (this.climbingWall)
{
this.velocity.y = .25;
}
else
{
this.velocity.y = .15;
this.jumpTimer.set(.2);
}
this.preventJumpTimer.set(.5);
playSound(sound_jump, this.pos);
}
}
if (this.jumpTimer.active() && !this.climbingWall)
{
// update variable height jump
this.groundTimer.unset();
if (this.holdingJump && this.velocity.y > 0 && this.jumpTimer.active())
this.velocity.y += .017;
}
if (!this.groundObject)
{
// air control
if (sign(moveInput.x) == sign(this.velocity.x))
moveInput.x *= .1; // moving with velocity
else
moveInput.x *= .2; // moving against velocity (stopping)
// slight extra gravity when moving down
if (this.velocity.y < 0)
this.velocity.y += gravity*.2;
}
}
if (this.pressedDodge && !this.dodgeTimer.active() && !this.dodgeRechargeTimer.active())
{
// start dodge
this.dodgeTimer.set(.4);
this.dodgeRechargeTimer.set(2);
this.jumpTimer.unset();
this.extinguish();
playSound(sound_dodge, this.pos);
if (!this.groundObject && this.getAliveTime() > .2)
this.velocity.y += .2;
}
// apply movement acceleration and clamp
this.velocity.x = clamp(this.velocity.x + moveInput.x * .042, maxCharacterSpeed, -maxCharacterSpeed);
// call parent, update physics
const oldVelocity = this.velocity.copy();
super.update();
if (!this.isPlayer && !this.dodgeTimer.active())
{
// apply collision damage
const deltaSpeedSquared = this.velocity.subtract(oldVelocity).lengthSquared();
deltaSpeedSquared > .1 && this.damage(10*deltaSpeedSquared);
}
if (this.climbingLadder || this.groundTimer.active() && !this.dodgeTimer.active())
{
const speed = this.velocity.length();
this.walkCyclePercent += speed * .5;
this.walkCyclePercent = speed > .01 ? mod(this.walkCyclePercent, 1) : 0;
}
else
this.walkCyclePercent = 0;
this.weapon.triggerIsDown = this.holdingShoot && !this.dodgeTimer.active();
if (!this.dodgeTimer.active())
{
if (this.grenadeCount > 0 && this.pressingThrow && !this.wasPressingThrow && !this.grendeThrowTimer.active())
{
// throw greande
--this.grenadeCount;
const grenade = new Grenade(this.pos);
grenade.velocity = this.velocity.add(vec2(this.getMirrorSign(),rand(.8,.7)).normalize(.25+rand(.02)));
grenade.angleVelocity = this.getMirrorSign() * rand(.8,.5);
playSound(sound_jump, this.pos);
this.grendeThrowTimer.set(1);
}
this.wasPressingThrow = this.pressingThrow;
}
// update mirror
if (this.moveInput.x && !this.dodgeTimer.active())
this.mirror = this.moveInput.x < 0;
// clamp x pos
this.pos.x = clamp(this.pos.x, levelSize.x-2, 2);
// randomly blink
rand() < .005 && this.blinkTimer.set(rand(.2,.1));
}
render()
{
if (!isOverlapping(this.pos, this.size, cameraPos, renderWindowSize))
return;
// set tile to use
this.tileIndex = this.isDead() ? this.bodyTile : this.climbingLadder || this.groundTimer.active() ? this.bodyTile + 2*this.walkCyclePercent|0 : this.bodyTile+1;
let additive = this.additiveColor.add(this.extraAdditiveColor);
if (this.isPlayer && !this.isDead() && this.dodgeRechargeTimer.elapsed() && this.dodgeRechargeTimer.get() < .2)
{
const v = .6 - this.dodgeRechargeTimer.get()*3;
additive = additive.add(new Color(0,v,v,0)).clamp();
}
const sizeScale = this.sizeScale;
const color = this.color.scale(this.burnColorPercent(),1);
const eyeColor = this.eyeColor.scale(this.burnColorPercent(),1);
const bodyPos = this.pos.add(vec2(0,-.1+.06*Math.sin(this.walkCyclePercent*PI)).scale(sizeScale));
drawTile(bodyPos, vec2(sizeScale), this.tileIndex, this.tileSize, color, this.angle, this.mirror, additive);
drawTile(this.pos.add(vec2(this.getMirrorSign(.05),.46).scale(sizeScale).rotate(-this.angle)),vec2(sizeScale/2),this.headTile,vec2(8), color,this.angle,this.mirror, additive);
//for(let i = this.grenadeCount; i--;)
// drawTile(bodyPos, vec2(.5), 5, vec2(8), new Color, this.angle, this.mirror, additive);
const blinkScale = this.canBlink ? this.isDead() ? .3: .5 + .5*Math.cos(this.blinkTimer.getPercent()*PI*2) : 1;
drawTile(this.pos.add(vec2(this.getMirrorSign(.05),.46).scale(sizeScale).rotate(-this.angle)),vec2(sizeScale/2, blinkScale*sizeScale/2),this.headTile+1,vec2(8), eyeColor, this.angle, this.mirror, this.additiveColor);
}
damage(damage, damagingObject)
{
if (this.destroyed)
return;
if (this.team == team_player)
{
// safety window after spawn
if (godMode || this.getAliveTime() < 2)
return;
}
if (this.isDead() && !this.persistent)
{
this.overkill += damage;
if (this.overkill > 5)
{
makeBlood(this.pos, 300);
this.destroy();
}
}
this.blinkTimer.set(rand(.5,.4));
makeBlood(damagingObject ? damagingObject.pos : this.pos);
super.damage(damage, damagingObject);
}
kill(damagingObject)
{
if (this.isDead())
return 0;
if (levelWarmup)
{
this.destroy();
return 1;
}
this.deadTimer.set();
this.size = this.size.scale(.5);
makeBlood(this.pos, 300);
playSound(sound_die, this.pos);
this.team = team_none;
this.health = 0;
const fallDirection = damagingObject ? sign(damagingObject.velocity.x) : randSign();
this.angleVelocity = fallDirection*rand(.22,.14);
this.angleDamping = .9;
this.weapon && this.weapon.destroy();
// move to back layer
this.renderOrder = 1;
}
collideWithTile(data, pos)
{
if (!data)
return;
if (data == tileType_ladder)
{
if (pos.y + 1 > this.lastPos.y - this.size.y*.5)
return;
if (getTileCollisionData(pos.add(vec2(0,1))) // above
&& !(getTileCollisionData(pos.add(vec2(1,0))) // left
&& getTileCollisionData(pos.add(vec2(1,0)))) // right
)
return; // dont collide if something above it and nothing to left or right
// allow standing on top of ladders
return !this.climbingLadder;
}
// break blocks above
const d = pos.y - this.pos.y;
if (!this.climbingLadder && this.velocity.y > .1 && d > 0 && d < this.size.y*.5)
{
if (destroyTile(pos))
{
this.velocity.y = 0;
return;
}
}
return 1;
}
collideWithObject(o)
{
if (this.isDead())
return super.collideWithObject(o);
if (o.velocity.lengthSquared() > .04)
{
const v = o.velocity.subtract(this.velocity);
const m = 25*o.mass * v.lengthSquared();
if (!o.groundObject && o.isCrushing && !this.persistent && o.velocity.y < 0 && this.pos.y < o.pos.y - o.size.y/2 && abs(o.pos.x - this.pos.x) < o.size.x*.5)
{
// crushing
this.damage(1e3, o);
if (this.isDead())
{
makeBlood(this.pos, 300);
this.destroy();
}
}
else if (m > 1)
this.damage(4*m|0, o)
}
return super.collideWithObject(o);
}
}
///////////////////////////////////////////////////////////////////////////////
const type_weak = 0;
const type_normal = 1;
const type_strong = 2;
const type_elite = 3;
const type_grenade= 4;
const type_count = 5;
function alertEnemies(pos, playerPos)
{
const radius = 4;
forEachObject(pos, radius, (o)=>{o.team == team_enemy && o.alert && o.alert(playerPos)});
debugAI && debugCircle(pos, radius, '#0ff6');
}
class Enemy extends Character
{
constructor(pos)
{
super(pos);
this.team = team_enemy;
this.sawPlayerTimer = new Timer;
this.reactionTimer = new Timer;
this.facePlayerTimer = new Timer;
this.holdJumpTimer = new Timer;
this.shootTimer = new Timer;
this.maxVisionRange = 12;
this.type = randSeeded()**3*min(level+1,type_count)|0;
let health = 1 + this.type;
this.eyeColor = new Color(1,.5,0);
if (this.type == type_weak)
{
this.color = new Color(0,1,0);
this.size = this.size.scale(this.sizeScale = .9);
}
else if (this.type == type_normal)
{
this.color = new Color(0,.4,1);
}
else if (this.type == type_strong)
{
this.color = new Color(1,0,0);
this.eyeColor = new Color(1,1,0);
}
else if (this.type == type_elite)
{
this.color = new Color(1,1,1);
this.eyeColor = new Color(1,0,0);
this.maxVisionRange = 15;
}
else if (this.type == type_grenade)
{
this.color = new Color(.7,0,1);
this.eyeColor = new Color(0,0,0);
this.grenadeCount = 3;
this.canBurn = 0;
}
if (this.isBig = randSeeded() < .05)
{
// chance of large enemy with extra health
this.size = this.size.scale(this.sizeScale = 1.3);
health *= 2;
this.grenadeCount *= 10;
this.maxVisionRange = 15;
--levelEnemyCount;
}
this.health = this.healthMax = health;
this.color = this.color.mutate();
this.mirror = rand() < .5;
new Weapon(this.pos, this);
--levelEnemyCount;
this.sightCheckFrame = rand(9)|0;
}
update()
{
if (!aiEnable || levelWarmup || this.isDead() || !this.inUpdateWindow())
{
if (this.weapon)
this.weapon.triggerIsDown = 0;
super.update();
return; // ignore offscreen objects
}
if (this.weapon)
this.weapon.localPos = this.weapon.localOffset.scale(this.sizeScale);
// update check if players are visible
const sightCheckFrames = 9;
ASSERT(this.sawPlayerPos || !this.sawPlayerTimer.isSet());
if (frame%sightCheckFrames == this.sightCheckFrame)
{
const sawRecently = this.sawPlayerTimer.isSet() && this.sawPlayerTimer.get() < 5;
const visionRangeSquared = (sawRecently ? this.maxVisionRange * 1.2 : this.maxVisionRange)**2;
debugAI && debugCircle(this.pos, visionRangeSquared**.5, '#f003', .1);
for(const player of players)
{
// check range
if (player && !player.isDead())
if (sawRecently || this.getMirrorSign() == sign(player.pos.x - this.pos.x))
if (sawRecently || abs(player.pos.x - this.pos.x) > abs(player.pos.y - this.pos.y) ) // 45 degree slope
if (this.pos.distanceSquared(player.pos) < visionRangeSquared)
{
const raycastHit = tileCollisionRaycast(this.pos, player.pos);
if (!raycastHit)
{
this.alert(player.pos, 1);
debugAI && debugLine(this.pos, player.pos, '#0f0',.1)
break;
}
debugAI && debugLine(this.pos, player.pos, '#f00',.1)
debugAI && raycastHit && debugPoint(raycastHit, '#ff0',.1)
}
}
if (sawRecently)
{
// alert nearby enemies
alertEnemies(this.pos, this.sawPlayerPos);
}
}
this.pressedDodge = this.climbingWall = this.pressingThrow = 0;
if (this.burnTimer.isSet())
{
// burning, run around
this.facePlayerTimer.unset();
// random jump
if (rand()< .005)
{
this.pressedJumpTimer.set(.05);
this.holdJumpTimer.set(rand(.05));
}
// random movement
if (rand()<.05)
this.moveInput.x = randSign()*rand(.6, .3);
this.moveInput.y = 0;
// random dodge
if (this.type == type_elite)
this.pressedDodge = 1;
else if (this.groundObject)
this.pressedDodge = rand() < .005;
}
else if (this.sawPlayerTimer.isSet() && this.sawPlayerTimer.get() < 10)
{
debugAI && debugPoint(this.sawPlayerPos, '#f00');
// wall climb
if (this.type >= type_strong && this.moveInput.x && !this.velocity.x && this.velocity.y < 0)
{
this.velocity.y *=.8;
this.climbingWall = 1;
this.pressedJumpTimer.set(.1);
this.holdJumpTimer.set(rand(.2));
}
const timeSinceSawPlayer = this.sawPlayerTimer.get();
this.weapon.localAngle *= .8;
if (this.reactionTimer.active())
{
// just saw player for first time, act surprised
this.moveInput.x = 0;
}
else if (timeSinceSawPlayer < 5)
{
debugAI && debugRect(this.pos, this.size, '#f00');
if (!this.dodgeTimer.active())
{
const playerDirection = sign(this.sawPlayerPos.x - this.pos.x);
if (this.type == type_grenade && rand() < .002 && this.getMirrorSign() == playerDirection)
this.pressingThrow = 1;
// actively fighting player
if (rand()<.05)
this.facePlayerTimer.set(rand(2,.5));
// random jump
if (rand()<(this.type < type_strong ? .0005 : .005))
{
this.pressedJumpTimer.set(.1);
this.holdJumpTimer.set(rand(.2));
}
// random movement
if (rand()<(this.isBig?.05:.02))
this.moveInput.x = 0;
else if (rand()<.01)
this.moveInput.x = rand()<.6 ? playerDirection*rand(.5, .2) : -playerDirection*rand(.4, .2);
if (rand()<.03)
this.moveInput.y = rand()<.5 ? 0 : randSign()*rand(.4, .2);
// random shoot
if (abs(this.sawPlayerPos.y - this.pos.y) < 4)
if (!this.shootTimer.isSet() || this.shootTimer.get() > 1)
rand() < (this.type > type_weak ? .02 : .01) && this.shootTimer.set(this.isBig ? rand(2,1) : .05);
}
// random dodge
if (this.type == type_elite)
this.pressedDodge = rand() < .01 && timeSinceSawPlayer < .5;
}
else
{
// was fighting but lost player
debugAI && debugRect(this.pos, this.size, '#ff0');
if (rand()<.04)
this.facePlayerTimer.set(rand(2,.5));
// random movement
if (rand()<.02)
this.moveInput.x = 0;
else if (rand()<.01)
this.moveInput.x = randSign()*rand(.4, .2);
// random jump
if (rand() < (this.sawPlayerPos.y > this.pos.y ? .002 : .001))
{
this.pressedJumpTimer.set(.1);
this.holdJumpTimer.set(rand(.2));
}
// random shoot
if (!this.shootTimer.isSet() || this.shootTimer.get() > 5)
rand() < .001 && this.shootTimer.set(rand(.2,.1));
// move up/down in dirction last player was seen
this.moveInput.y = clamp(this.sawPlayerPos.y - this.pos.y,.5,-.5);
}
}
else
{
// try to act normal
if (rand()<.03)
this.moveInput.x = 0;
else if (rand()<.005)
this.moveInput.x = randSign()*rand(.2, .1);
else if (rand()<.001)
this.moveInput.x = randSign()*1e-9; // hack: look in a direction
this.weapon.localAngle = lerp(.1, .7, this.weapon.localAngle);
this.reactionTimer.unset();
}
if (this.isBig && this.type != type_elite)
{
// big enemies cant jump
this.pressedJumpTimer.unset();
this.holdJumpTimer.unset();
}
this.holdingShoot = this.shootTimer.active();
this.holdingJump = this.holdJumpTimer.active();
super.update();
// override default mirror
if (this.facePlayerTimer.active() && !this.dodgeTimer.active() && !this.reactionTimer.active())
this.mirror = this.sawPlayerPos.x < this.pos.x;
}
alert(playerPos, resetSawPlayer)
{
if (resetSawPlayer || !this.sawPlayerTimer.isSet())
{
if (!this.reactionTimer.isSet())
{
this.reactionTimer.set(rand(1,.5)*(this.type == type_weak ? 2 : 1));
this.facePlayerTimer.set(rand(2,1));
if (this.groundObject && rand() < .2)
this.velocity.y += .1; // random jump
}
this.sawPlayerTimer.set();
this.sawPlayerPos = playerPos;
}
}
damage(damage, damagingObject)
{
super.damage(damage, damagingObject);
if (!this.isDead())
{
this.alert(damagingObject ? damagingObject.pos.subtract(damagingObject.velocity.normalize()) : this.pos, 1);
this.reactionTimer.set(rand(1,.5));
this.shootTimer.unset();
}
}
kill(damagingObject)
{
if (this.isDead())
return 0;
super.kill(damagingObject);
levelWarmup || ++totalKills;
}
}
///////////////////////////////////////////////////////////////////////////////
class Player extends Character
{
constructor(pos, playerIndex=0)
{
super(pos);
this.grenadeCount = 3;
this.burnTime = 2;
this.eyeColor = (new Color).setHSLA(-playerIndex*.6,1,.5);
if (playerIndex)
{
this.color = (new Color).setHSLA(playerIndex*.3-.3,.5,.5);
this.extraAdditiveColor = (new Color).setHSLA(playerIndex*.3-.3,1,.1,0);
}
this.bodyTile = 5;
this.headTile = 18;
this.playerIndex = playerIndex;
this.renderOrder = 20 + 10*playerIndex;
this.walkSoundTime = 0;
this.persistent = this.wasHoldingJump = this.canBlink = this.isPlayer = 1;
this.team = team_player;
new Weapon(this.pos, this);
players[playerIndex] = this;
// small jump on spawn
this.velocity.y = .2;
this.mirror = playerIndex%2;
--playerLives;
}
update()
{
if (this.isDead())
{
if (this.persistent && playerLives)
{
if (players.length == 1)
{
if (this.deadTimer.get() > 2)
{
this.persistent = 0;
new Player(checkpointPos, this.playerIndex);
playSound(sound_jump, cameraPos);
}
}
else
{
// respawn only if all players dead, or checkpoint touched
let hasLivingPlayers = 0;
let minDeadTime = 1e3;
for(const player of players)
{
if (player)
{
minDeadTime = min(minDeadTime, player.isDead() ? player.deadTimer.get() : 1e3);
hasLivingPlayers |= (!player.isDead() && player.getAliveTime() > .1);
}
}
if (minDeadTime > 2)
{
if (!hasLivingPlayers)
{
// respawn all
this.persistent = 0;
new Player(checkpointPos.add(vec2(1-this.playerIndex/2,0)), this.playerIndex);
this.playerIndex || playSound(sound_jump, cameraPos);
}
else if (checkpointTimer.active())
{
// respawn if checkpoint active
this.persistent = 0;
const player = new Player(checkpointPos, this.playerIndex);
playSound(sound_jump, cameraPos);
}
}
}
}
super.update();
return;
}
// wall climb
this.climbingWall = 0;
if (this.moveInput.x && !this.velocity.x && this.velocity.y < 0)
{
this.velocity.y *=.8;
this.climbingWall = 1;
}
// movement control
this.moveInput.x = isUsingGamepad || this.playerIndex ? gamepadStick(0, this.playerIndex).x : keyIsDown(39) - keyIsDown(37);
this.moveInput.y = isUsingGamepad || this.playerIndex ? gamepadStick(0, this.playerIndex).y : keyIsDown(38) - keyIsDown(40);
// jump
this.holdingJump = (!this.playerIndex && keyIsDown(38)) || gamepadIsDown(0, this.playerIndex);
if (!this.holdingJump)
this.pressedJumpTimer.unset();
else if (!this.wasHoldingJump || this.climbingWall)
this.pressedJumpTimer.set(.3);
this.wasHoldingJump = this.holdingJump;
// controls
this.holdingShoot = !this.playerIndex && (mouseIsDown(0) || keyIsDown(90)) || gamepadIsDown(2, this.playerIndex);
this.pressingThrow = !this.playerIndex && (mouseIsDown(2) || keyIsDown(67)) || gamepadIsDown(1, this.playerIndex);
this.pressedDodge = !this.playerIndex && (mouseIsDown(1) || keyIsDown(88)) || gamepadIsDown(3, this.playerIndex);
super.update();
// update walk sound
this.walkSoundTime += abs(this.velocity.x);
if (abs(this.velocity.x) > .01 && this.groundTimer.active() && !this.dodgeTimer.active())
{
if (this.walkSoundTime > 1)
{
this.walkSoundTime = 0;
playSound(sound_walk, this.pos);
}
}
else
this.walkSoundTime = .5;
if (players.length > 1 && !this.isDead())
{
// move to other player if offscreen and multiplayer
if (!isOverlapping(this.pos, this.size, cameraPos, gameplayWindowSize))
{
// move to location of another player if not falling off a cliff
if (tileCollisionRaycast(this.pos,vec2(this.pos.x,0)))
{
for(const player of players)
if (player && player != this && !player.isDead())
{
this.pos = player.pos.copy();
this.velocity = vec2();
playSound(sound_jump, this.pos);
}
}
else
this.kill();
}
}
}
}
================================================
FILE: appEffects.js
================================================
/*
Javascript Space Game
By Frank Force 2021
*/
'use strict';
const precipitationEnable = 1;
const debugFire = 0;
///////////////////////////////////////////////////////////////////////////////
// sounds
const sound_shoot = [,,90,,.01,.03,4,,,,,,,9,50,.2,,.2,.01];
const sound_destroyTile = [.5,,1e3,.02,,.2,1,3,.1,,,,,1,-30,.5,,.5];
const sound_die = [.5,.4,126,.05,,.2,1,2.09,,-4,,,1,1,1,.4,.03];
const sound_jump = [.4,.2,250,.04,,.04,,,1,,,,,3];
const sound_dodge = [.4,.2,150,.05,,.05,,,-1,,,,,4,,,,,.02];
const sound_walk = [.3,.1,70,,,.01,4,,,,-9,.1,,,,,,.5];
const sound_explosion = [2,.2,72,.01,.01,.2,4,,,,,,,1,,.5,.1,.5,.02];
const sound_checkpoint = [.6,0,500,,.04,.3,1,2,,,570,.02,.02,,,,.04];
const sound_rain = [.02,,1e3,2,,2,,,,,,,,99];
const sound_wind = [.01,.3,2e3,2,1,2,,,,,,,1,2,,,,,,.1];
const sound_grenade = [.5,.01,300,,,.02,3,.22,,,-9,.2,,,,,,.5];
///////////////////////////////////////////////////////////////////////////////
// special effects
const persistentParticleDestroyCallback = (particle)=>
{
// copy particle to tile layer on death
ASSERT(particle.tileIndex < 0); // quick draw to tile layer uses canvas 2d so must be untextured
if (particle.groundObject)
tileLayer.drawTile(particle.pos, particle.size, particle.tileIndex, particle.tileSize, particle.color, particle.angle, particle.mirror);
}
function makeBlood(pos, amount=50)
{
const emitter = new ParticleEmitter(
pos, 1, .1, amount, PI, // pos, emitSize, emitTime, emitRate, emiteCone
undefined, undefined, // tileIndex, tileSize
new Color(1,0,0), new Color(.5,0,0), // colorStartA, colorStartB
new Color(1,0,0), new Color(.5,0,0), // colorEndA, colorEndB
3, .1, .1, .1, .1, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
1, .95, .7, PI, 0, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 1 // randomness, collide, additive, randomColorLinear, renderOrder
);
emitter.particleDestroyCallback = persistentParticleDestroyCallback;
return emitter;
}
function makeFire(pos = vec2())
{
return new ParticleEmitter(
pos, 1, 0, 60, PI, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(1,1,0), new Color(1,.5,.5), // colorStartA, colorStartB
new Color(1,0,0), new Color(1,.5,.1), // colorEndA, colorEndB
.5, .5, .1, .01, .1, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
.95, .1, -.05, PI, .5, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 0, 1); // randomness, collide, additive, randomColorLinear, renderOrder
}
function makeDebris(pos, color = new Color, amount = 100)
{
const color2 = color.lerp(new Color, .5);
const emitter = new ParticleEmitter(
pos, 1, .1, amount, PI, // pos, emitSize, emitTime, emitRate, emiteCone
undefined, undefined, // tileIndex, tileSize
color, color2, // colorStartA, colorStartB
color, color2, // colorEndA, colorEndB
3, .2, .2, .1, .05, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
1, .95, .4, PI, 0, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 1 // randomness, collide, additive, randomColorLinear, renderOrder
);
emitter.elasticity = .3;
emitter.particleDestroyCallback = persistentParticleDestroyCallback;
return emitter;
}
function makeWater(pos, amount=400)
{
// overall spray
new ParticleEmitter(
pos, 1, .05, 400, PI, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(1,1,1,.5), new Color(.5,1,1,.2), // colorStartA, colorStartB
new Color(1,1,1,.5), new Color(.5,1,1,.2), // colorEndA, colorEndB
.5, .5, 2, .1, .05, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
.9, 1, 0, PI, .5, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 0, 0, 0, 1e9 // randomness, collide, additive, randomColorLinear, renderOrder
);
// droplets
const emitter = new ParticleEmitter(
pos, 1, .1, amount, PI, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(.8,1,1,.6), new Color(.5,.5,1,.2), // colorStartA, colorStartB
new Color(.8,1,1,.6), new Color(.5,.5,1,.2), // colorEndA, colorEndB
2, .1, .1, .2, 0, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
.99, 1, .5, PI, .2, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 1 // randomness, collide, additive, randomColorLinear, renderOrder
);
emitter.elasticity = .2;
emitter.trailScale = 2;
// put out fires
const radius = 3;
forEachObject(pos, 3, (o)=>
{
if (o.isGameObject)
{
o.burnTimer.isSet() && o.extinguish();
const d = o.pos.distance(pos);
const p = percent(d, radius/2, radius);
const force = o.pos.subtract(pos).normalize(p*radius*.2);
o.applyForce(force);
if (o.isDead && o.isDead())
o.angleVelocity += randSign()*rand(radius/4,.3);
}
});
debugFire && debugCircle(pos, radius, '#0ff', 1)
return emitter;
}
///////////////////////////////////////////////////////////////////////////////
function explosion(pos, radius=2)
{
ASSERT(radius > 0);
if (levelWarmup)
return;
const damage = radius*2;
// destroy level
for(let x = -radius; x < radius; ++x)
{
const h = (radius**2 - x**2)**.5;
for(let y = -h; y <= h; ++y)
destroyTile(pos.add(vec2(x,y)), 0, 0);
}
// cleanup neighbors
const cleanupRadius = radius + 1;
for(let x = -cleanupRadius; x < cleanupRadius; ++x)
{
const h = (cleanupRadius**2 - x**2)**.5;
for(let y = -h; y < h; ++y)
decorateTile(pos.add(vec2(x,y)).int());
}
// kill/push objects
const maxRangeSquared = (radius*1.5)**2;
forEachObject(pos, radius*3, (o)=>
{
const d = o.pos.distance(pos);
if (o.isGameObject)
{
// do damage
d < radius && o.damage(damage);
// catch fire
d < radius*1.5 && o.burn();
}
// push
const p = percent(d, radius, 2*radius);
const force = o.pos.subtract(pos).normalize(p*radius*.2);
o.applyForce(force);
if (o.isDead && o.isDead())
o.angleVelocity += randSign()*rand(p*radius/4,.3);
});
playSound(sound_explosion, pos);
debugFire && debugCircle(pos, maxRangeSquared**.5, '#f00', 2);
debugFire && debugCircle(pos, radius**.5, '#ff0', 2);
// smoke
new ParticleEmitter(
pos, radius/2, .2, 50*radius, PI, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(0,0,0), new Color(0,0,0), // colorStartA, colorStartB
new Color(0,0,0,0), new Color(0,0,0,0), // colorEndA, colorEndB
1, .5, 2, .1, .05, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
.9, 1, -.3, PI, .1, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 0, 0, 0, 1e8 // randomness, collide, additive, randomColorLinear, renderOrder
);
// fire
new ParticleEmitter(
pos, radius/2, .1, 100*radius, PI, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(1,.5,.1), new Color(1,.1,.1), // colorStartA, colorStartB
new Color(1,.5,.1,0), new Color(1,.1,.1,0), // colorEndA, colorEndB
.5, .5, 2, .1, .05, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
.9, 1, 0, PI, .05, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 0, 1, 0, 1e9 // randomness, collide, additive, randomColorLinear, renderOrder
);
}
///////////////////////////////////////////////////////////////////////////////
class TileCascadeDestroy extends EngineObject
{
constructor(pos, cascadeChance=1, glass=0)
{
super(pos, vec2());
this.cascadeChance = cascadeChance;
this.destroyTimer = new Timer(glass ? .05 : rand(.3, .1));
}
update()
{
if (this.destroyTimer.elapsed())
{
destroyTile(this.pos, 1, 1, this.cascadeChance);
this.destroy();
}
}
}
function decorateBackgroundTile(pos)
{
const tileData = getTileBackgroundData(pos);
if (tileData <= 0)
return; // no need to clear if background cant change
// round corners
for(let i=4;i--;)
{
// check corner neighbors
const neighborTileDataA = getTileBackgroundData(pos.add(vec2().setAngle(i*PI/2)));
const neighborTileDataB = getTileBackgroundData(pos.add(vec2().setAngle((i+1)%4*PI/2)));
if (neighborTileDataA > 0 | neighborTileDataB > 0)
continue;
const directionVector = vec2().setAngle(i*PI/2+PI/4, 10).int();
let drawPos = pos.add(vec2(.5)) // center
.scale(16).add(directionVector).int(); // direction offset
// clear rect without any scaling to prevent blur from filtering
const s = 2;
tileBackgroundLayer.context.clearRect(
drawPos.x - s/2|0,
tileBackgroundLayer.canvas.height - drawPos.y - s/2|0,
s|0, s|0);
}
}
function decorateTile(pos)
{
ASSERT((pos.x|0) == pos.x && (pos.y|0)== pos.y);
const tileData = getTileCollisionData(pos);
if (tileData <= 0)
{
tileData || tileLayer.setData(pos, new TileLayerData, 1); // force it to clear if it is empty
return;
}
if (tileData != tileType_dirt &
tileData != tileType_base &
tileData != tileType_pipeV &
tileData != tileType_pipeH &
tileData != tileType_solid)
return;
for(let i=4;i--;)
{
// outline towards neighbors of differing type
const neighborTileData = getTileCollisionData(pos.add(vec2().setAngle(i*PI/2)));
if (neighborTileData == tileData)
continue;
// hacky code to make pixel perfect outlines
let size = tileData == tileType_dirt ? vec2( rand(16,8), 2) : vec2( 16, 1);
i&1 && (size = size.flip());
const color = tileData == tileType_dirt ? levelGroundColor.mutate(.1) : new Color(.1,.1,.1);
tileLayer.context.fillStyle = color.rgba();
const drawPos = pos.scale(16);
if (tileData == tileType_dirt)
tileLayer.context.fillRect(
drawPos.x + ((i==1?14:0)+(i&1?0:8-size.x/2)) |0,
tileLayer.canvas.height - drawPos.y + ((i==0?-14:0)-(i&1?8-size.y/2:0)) |0,
size.x|0, -size.y|0);
else
tileLayer.context.fillRect(
drawPos.x + (i==1?15:0) |0,
tileLayer.canvas.height - drawPos.y + (i==0?-15:0) |0,
size.x|0, -size.y|0);
}
}
function destroyTile(pos, makeSound = 1, cleanNeighbors = 1, maxCascadeChance = 1)
{
// pos must be an int
pos = pos.int();
// destroy tile
const tileType = getTileCollisionData(pos);
if (!tileType) return 1; // empty
if (tileType == tileType_solid) return 0; // indestructable
const centerPos = pos.add(vec2(.5));
const layerData = tileLayer.getData(pos);
if (layerData)
{
makeDebris(centerPos, layerData.color.mutate());
makeSound && playSound(sound_destroyTile, centerPos);
setTileCollisionData(pos, tileType_empty);
tileLayer.setData(pos, new TileLayerData, 1); // set and clear tile
// cleanup neighbors
if (cleanNeighbors)
{
for(let i=-1;i<=1;++i)
for(let j=-1;j<=1;++j)
decorateTile(pos.add(vec2(i,j)));
}
// if weak earth, random chance of delayed destruction of tile directly above
if (tileType == tileType_glass)
{
maxCascadeChance = 1;
if (getTileCollisionData(pos.add(vec2(0,-1))) == tileType)
new TileCascadeDestroy(pos.add(vec2(0,-1)), 1, 1);
}
else if (tileType != tileType_dirt)
maxCascadeChance = 0;
if (rand() < maxCascadeChance && getTileCollisionData(pos.add(vec2(0,1))) == tileType)
new TileCascadeDestroy(pos.add(vec2(0,1)), maxCascadeChance * .4, tileType == tileType_glass);
}
return 1;
}
///////////////////////////////////////////////////////////////////////////////
function drawStars()
{
randSeed = levelSeed;
for(let i = lowGraphicsSettings ? 400 : 1e3; i--;)
{
let size = randSeeded(6, 1);
let speed = randSeeded() < .9 ? randSeeded(5) : randSeeded(99,9);
let color = (new Color).setHSLA(randSeeded(.2,-.3), randSeeded()**9, randSeeded(1,.5), randSeeded(.9,.3));
if (i < 9)
{
// suns or moons
size = randSeeded()**3*99 + 9;
speed = randSeeded(5);
color = (new Color).setHSLA(randSeeded(), randSeeded(), randSeeded(1,.5)).add(levelSkyColor.scale(.5)).clamp();
}
const w = mainCanvas.width+400, h = mainCanvas.height+400;
const screenPos = vec2(
(randSeeded(w)+time*speed)%w-200,
(randSeeded(h)+time*speed*randSeeded(1,.2))%h-200);
if (lowGraphicsSettings)
{
// drawing stars with gl wont work in low graphics mode, just draw rects
mainContext.fillStyle = color.rgba();
if (size < 9)
mainContext.fillRect(screenPos.x, screenPos.y, size, size);
else
mainContext.beginPath(mainContext.fill(mainContext.arc(screenPos.x, screenPos.y, size, 0, 9)));
}
else
drawTileScreenSpace(screenPos, vec2(size), 0, vec2(16), color);
}
}
function updateSky()
{
if (!skyParticles)
return;
let skyParticlesPos = cameraPos.add(vec2(rand(-40,40),0));
const raycastHit = tileCollisionRaycast(vec2(skyParticlesPos.x, levelSize.y), vec2(skyParticlesPos.x, 0));
if (raycastHit && raycastHit.y > cameraPos.y+10)
skyParticlesPos = raycastHit;
skyParticles.pos = skyParticlesPos.add(vec2(0,20));
if (rand() < .002)
{
skyParticles.emitRate = clamp(skyParticles.emitRate + rand(200,-200), 500);
skyParticles.angle = clamp(skyParticles.angle + rand(.3,-.3),PI+.5,PI-.5);
}
if (!levelWarmup && !skySoundTimer.active())
{
skySoundTimer.set(rand(2,1));
playSound(skyRain ? sound_rain : sound_wind, skyParticlesPos, 20, skyParticles.emitRate/1e3);
if (rand() < .1)
playSound(sound_wind, skyParticlesPos, 20, rand(skyParticles.emitRate/1e3));
}
}
///////////////////////////////////////////////////////////////////////////////
let tileParallaxLayers = [];
function generateParallaxLayers()
{
tileParallaxLayers = [];
for(let i=0; i<3; ++i)
{
const parallaxSize = vec2(600,300), startGroundLevel = rand(99,120)+i*30;
const tileParallaxLayer = tileParallaxLayers[i] = new TileLayer(vec2(), parallaxSize);
let groundLevel = startGroundLevel, groundSlope = rand(1,-1);
tileParallaxLayer.renderOrder = -3e3+i;
tileParallaxLayer.canvas.width = parallaxSize.x;
const layerColor = levelColor.mutate(.2).lerp(levelSkyColor,.95-i*.15);
const gradient = tileParallaxLayer.context.fillStyle = tileParallaxLayer.context.createLinearGradient(0,0,0,tileParallaxLayer.canvas.height = parallaxSize.y);
gradient.addColorStop(0,layerColor.rgba());
gradient.addColorStop(1,layerColor.subtract(new Color(1,1,1,0)).mutate(.1).clamp().rgba());
for(let x=parallaxSize.x;x--;)
{
// pull slope towards start ground level
tileParallaxLayer.context.fillRect(x,groundLevel += groundSlope = rand() < .05 ? rand(1,-1) :
groundSlope + (startGroundLevel - groundLevel)/2e3,1,parallaxSize.y)
}
}
}
function updateParallaxLayers()
{
tileParallaxLayers.forEach((tileParallaxLayer, i)=>
{
const distance = 4+i;
const parallax = vec2(150,30).scale((i*i+1));
const cameraDeltaFromCenter = cameraPos.subtract(levelSize.scale(.5)).divide(levelSize.scale(-.5).divide(parallax));
tileParallaxLayer.scale = vec2(distance/cameraScale);
tileParallaxLayer.pos = cameraPos
.subtract(tileParallaxLayer.size.multiply(tileParallaxLayer.scale).scale(.5))
.add(cameraDeltaFromCenter.scale(1/cameraScale))
.subtract(vec2(0,150/cameraScale))
});
}
================================================
FILE: appLevel.js
================================================
/*
Javascript Space Game
By Frank Force 2021
*/
'use strict';
const tileType_ladder = -1;
const tileType_empty = 0;
const tileType_solid = 1;
const tileType_dirt = 2;
const tileType_base = 3;
const tileType_pipeH = 4;
const tileType_pipeV = 5;
const tileType_glass = 6;
const tileType_baseBack= 7;
const tileType_window = 8;
const tileRenderOrder = -1e3;
const tileBackgroundRenderOrder = -2e3;
// level objects
let players=[], playerLives, tileLayer, tileBackgroundLayer, totalKills;
// level settings
let levelSize, level, levelSeed, levelEnemyCount, levelWarmup;
let levelColor, levelBackgroundColor, levelSkyColor, levelSkyHorizonColor, levelGroundColor;
let skyParticles, skyRain, skySoundTimer = new Timer;
let gameTimer = new Timer, levelTimer = new Timer, levelEndTimer = new Timer;
let tileBackground;
const setTileBackgroundData = (pos, data=0)=>
pos.arrayCheck(tileCollisionSize) && (tileBackground[(pos.y|0)*tileCollisionSize.x+pos.x|0] = data);
const getTileBackgroundData = (pos)=>
pos.arrayCheck(tileCollisionSize) ? tileBackground[(pos.y|0)*tileCollisionSize.x+pos.x|0] : 0;
///////////////////////////////////////////////////////////////////////////////
// level generation
const resetGame=()=>
{
levelEndTimer.unset();
gameTimer.set(totalKills = level = 0);
nextLevel(playerLives = 6);
}
function buildTerrain(size)
{
tileBackground = [];
initTileCollision(size);
let startGroundLevel = rand(40, 60);
let groundLevel = startGroundLevel;
let groundSlope = rand(.5,-.5);
let canayonWidth = 0, backgroundDelta = 0, backgroundDeltaSlope = 0;
for(let x=0; x < size.x; x++)
{
// pull slope towards start ground level
groundLevel += groundSlope = rand() < .05 ? rand(.5,-.5) :
groundSlope + (startGroundLevel - groundLevel)/1e3;
// small jump
if (rand() < .04)
groundLevel += rand(9,-9);
if (rand() < .03)
{
// big jump
const jumpDelta = rand(9,-9);
startGroundLevel = clamp(startGroundLevel + jumpDelta, 80, 20);
groundLevel += jumpDelta;
groundSlope = rand(.5,-.5);
}
--canayonWidth;
if (rand() < .005)
canayonWidth = rand(7, 2);
backgroundDelta += backgroundDeltaSlope;
if (rand() < .1)
backgroundDelta = rand(3, -1);
if (rand() < .1)
backgroundDelta = 0;
if (rand() < .1)
backgroundDeltaSlope = rand(1,-1);
backgroundDelta = clamp(backgroundDelta, 3, -1)
groundLevel = clamp(groundLevel, 99, 30);
for(let y=0; y < size.y; y++)
{
const pos = vec2(x,y);
let frontTile = tileType_empty;
if (y < groundLevel && canayonWidth <= 0)
frontTile = tileType_dirt;
let backTile = tileType_empty;
if (y < groundLevel + backgroundDelta)
backTile = tileType_dirt;
setTileCollisionData(pos, frontTile);
setTileBackgroundData(pos, backTile);
}
}
// add random holes
for(let i=levelSize.x; i--;)
{
const pos = vec2(rand(levelSize.x), rand(levelSize.y-19, 19));
for(let x = rand(9,1)|0;--x;)
for(let y = rand(9,1)|0;--y;)
setTileCollisionData(pos.add(vec2(x,y)), tileType_empty);
}
}
function spawnProps(pos)
{
if (abs(checkpointPos.x-pos.x) > 5)
{
new Prop(pos);
const propPlaceSize = .51;
if (randSeeded() < .2)
{
// 3 triangle prop stack
new Prop(pos.add(vec2(propPlaceSize*2,0)));
if (randSeeded() < .2)
new Prop(pos.add(vec2(propPlaceSize,propPlaceSize*2)));
}
else if (randSeeded() < .2)
{
// 3 column prop stack
new Prop(pos.add(vec2(0,propPlaceSize*2)));
if (randSeeded() < .2)
new Prop(pos.add(vec2(0,propPlaceSize*4)));
}
}
}
function buildBase()
{
let raycastHit;
for(let tries=99;!raycastHit;)
{
if (!tries--)
return 1; // count not find pos
const pos = vec2(randSeeded(levelSize.x-40,40), levelSize.y);
// must not be near player start
if (abs(checkpointPos.x-pos.x) > 30)
raycastHit = tileCollisionRaycast(pos, vec2(pos.x, 0));
}
const cave = rand() < .5;
const baseBottomCenterPos = raycastHit.int();
const baseSize = randSeeded(20,9)|0;
const baseFloors = cave? 1 : randSeeded(6,1)|0;
const basementFloors = randSeeded(cave?7:4, 0)|0;
let floorBottomCenterPos = baseBottomCenterPos.subtract(vec2(0,basementFloors*6));
floorBottomCenterPos.y = max(floorBottomCenterPos.y, 9); // prevent going through bottom
let floorWidth = baseSize;
let previousFloorHeight = 0;
for(let floor=-basementFloors; floor <= baseFloors; ++floor)
{
const topFloor = floor == baseFloors;
const groundFloor = !floor;
const isCaveFloor = cave ? rand() < .8 | (floor == 0 && rand() < .6): 0;
let floorHeight = isCaveFloor ? randSeeded(9,2)|0 : topFloor? 0 : groundFloor? randSeeded(9,4)|0 : randSeeded(7,2)|0;
const floorSpace = topFloor ? 4 : max(floorHeight - 1, 0);
let backWindow = rand() < .5;
const windowTop = rand(4,2);
for(let x=-floorWidth; x <= floorWidth; ++x)
{
const isWindow = !isCaveFloor && randSeeded() < .3;
const hasSide = !isCaveFloor && randSeeded() < .9;
if (cave)
backWindow = 0;
else if (rand() < .1)
backWindow = !backWindow;
if (cave && rand() < .2)
floorHeight = clamp(floorHeight + rand(3,-3)|0, 9, 2)
for(let y=-1; y < floorHeight; ++y)
{
const pos = floorBottomCenterPos.add(vec2(x,y));
let foregroundTile = tileType_empty;
if (isCaveFloor)
{
// add ceiling and floor
if ( y < 0 | y == floorHeight-1)
foregroundTile = tileType_dirt;
setTileBackgroundData(pos, tileType_dirt);
setTileCollisionData(pos, foregroundTile);
}
else
{
// add ceiling and floor
const isHorizontal = y < 0 | y == floorHeight-1;
if (isHorizontal)
foregroundTile = tileType_pipeH;
// add walls and windows
if (abs(x) == floorWidth)
foregroundTile = isHorizontal ? tileType_base : isWindow ? tileType_glass : tileType_pipeV;
let backgroundTile = foregroundTile>0||floorHeight<3? tileType_baseBack : tileType_base;
if (backWindow && y > 0 && y < floorHeight-windowTop && abs(x) < floorWidth-2)
backgroundTile = tileType_window;
setTileBackgroundData(pos, backgroundTile);
setTileCollisionData(pos, foregroundTile);
}
}
}
// add ladders to floor below
if (!cave || !topFloor)
for(let ladderCount=randSeeded(2)+1|0;ladderCount--;)
{
const x = randSeeded(floorWidth-1, -floorWidth+1)|0;
const pos = floorBottomCenterPos.add(vec2(x,-2));
let y=0;
let hitBottom = 0;
for(; y < levelSize.y; ++y)
{
const pos = floorBottomCenterPos.add(vec2(x,-y-1));
if (pos.y < 2)
{
// hit bottom, no ladder
break;
}
if (y && getTileCollisionData(pos) > 0 && getTileCollisionData(pos.add(vec2(0,1))) <= 0 )
{
for(;y--;)
{
const pos = floorBottomCenterPos.add(vec2(x,-y-1));
setTileCollisionData(pos, tileType_ladder);
}
break;
}
}
}
// spawn crates
const propCount = randSeeded(floorWidth/2)|0;
for(let i = propCount; i--;)
spawnProps(floorBottomCenterPos.add(vec2(randSeeded( floorWidth-2,-floorWidth+2),.5)));
if (topFloor || floorSpace > 1)
{
// spawn enemies
for(let i = propCount; i--;)
{
const pos = floorBottomCenterPos.add(vec2(randSeeded( floorWidth-1,-floorWidth+1),.7));
new Enemy(pos);
}
}
const oldFloorWidth = floorWidth;
floorWidth = max(floorWidth + randSeeded(8,-8),9)|0;
floorBottomCenterPos.y += floorHeight;
floorBottomCenterPos.x += randSeeded(oldFloorWidth - floorWidth+1)|0;
previousFloorHeight = floorHeight;
}
//checkpointPos = floorBottomCenterPos.copy(); // start player on base for testing
// spawn random enemies and props
for(let i=20;levelEnemyCount>0&&i--;)
{
const pos = vec2(floorBottomCenterPos.x + randSeeded(99, -99), levelSize.y);
raycastHit = tileCollisionRaycast(pos, vec2(pos.x, 0));
// must not be near player start
if (raycastHit && abs(checkpointPos.x-pos.x) > 20)
{
const pos = raycastHit.add(vec2(0,2));
randSeeded() < .7 ? new Enemy(pos) : spawnProps(pos);
}
}
}
function generateLevel()
{
levelEndTimer.unset();
// remove all objects that are not persistnt or are descendants of something persitant
for(const o of engineObjects)
o.destroy();
engineObjects = [];
engineCollideObjects = [];
// randomize ground level hills
buildTerrain(levelSize);
// find starting poing for player
let raycastHit;
for(let tries=99;!raycastHit;)
{
if (!tries--)
return 1; // count not find pos
// start on either side of level
checkpointPos = vec2(levelSize.x/2 + (levelSize.x/2-10-randSeeded(9))*(randSeeded()<.5?-1:1) | 0, levelSize.y);
raycastHit = tileCollisionRaycast(checkpointPos, vec2(checkpointPos.x, 0));
}
checkpointPos = raycastHit.add(vec2(0,1));
// random bases until there enough enemies
for(let tries=99;levelEnemyCount>0;)
{
if (!tries--)
return 1; // count not spawn enemies
if (buildBase())
return 1;
}
// build checkpoints
for(let x=0; x<levelSize.x-9; )
{
x += rand(100,70);
const pos = vec2(x, levelSize.y);
raycastHit = tileCollisionRaycast(pos, vec2(pos.x, 0));
// must not be near player start
if (raycastHit && abs(checkpointPos.x-pos.x) > 50)
{
// todo prevent overhangs
const pos = raycastHit.add(vec2(0,1));
new Checkpoint(pos);
}
}
}
const groundTileStart = 8;
function makeTileLayers(level_)
{
// create foreground layer
tileLayer = new TileLayer(vec2(), levelSize);
tileLayer.renderOrder = tileRenderOrder;
// create background layer
tileBackgroundLayer = new TileLayer(vec2(), levelSize);
tileBackgroundLayer.renderOrder = tileBackgroundRenderOrder;
for(let x=levelSize.x;x--;)
for(let y=levelSize.y;y--;)
{
const pos = vec2(x,y);
let tileType = getTileCollisionData(pos);
if (tileType)
{
// todo pick tile, direction etc based on neighbors tile type
let direction = rand(4)|0
let mirror = rand(2)|0;
let color;
let tileIndex = groundTileStart;
if (tileType == tileType_dirt)
{
tileIndex = groundTileStart+2 + rand()**3*2|0;
color = levelColor.mutate(.03);
}
else if (tileType == tileType_pipeH)
{
tileIndex = groundTileStart+5;
direction = 1;
}
else if (tileType == tileType_pipeV)
{
tileIndex = groundTileStart+5;
direction = 0;
}
else if (tileType == tileType_glass)
{
tileIndex = groundTileStart+5;
direction = 0;
color = new Color(0,1,1,.5);
}
else if (tileType == tileType_base)
tileIndex = groundTileStart+4;
else if (tileType == tileType_ladder)
{
tileIndex = groundTileStart+7;
direction = mirror = 0;
}
tileLayer.setData(pos, new TileLayerData(tileIndex, direction, mirror, color));
}
tileType = getTileBackgroundData(pos);
if (tileType)
{
// todo pick tile, direction etc based on neighbors tile type
const direction = rand(4)|0
const mirror = rand(2)|0;
let color = new Color();
let tileIndex = groundTileStart;
if (tileType == tileType_dirt)
{
tileIndex = groundTileStart +2 + rand()**3*2|0;
color = levelColor.mutate();
}
else if (tileType == tileType_base)
{
tileIndex = groundTileStart+6;
color = color.scale(rand(1,.7),1)
}
else if (tileType == tileType_baseBack)
{
tileIndex = groundTileStart+6;
color = color.scale(rand(.5,.3),1).mutate();
}
else if (tileType == tileType_window)
{
tileIndex = 0;
color = new Color(0,1,1,.5);
}
tileBackgroundLayer.setData(pos, new TileLayerData(tileIndex, direction, mirror, color.scale(.4,1)));
}
}
tileLayer.redraw();
tileBackgroundLayer.redraw();
}
function applyArtToLevel()
{
makeTileLayers();
// apply decoration to level tiles
for(let x=levelSize.x;x--;)
for(let y=levelSize.y;--y;)
{
decorateBackgroundTile(vec2(x,y));
decorateTile(vec2(x,y));
}
generateParallaxLayers();
if (precipitationEnable && !lowGraphicsSettings)
{
// create rain or snow particles
if (skyRain = rand() < .5)
{
// rain
skyParticles = new ParticleEmitter(
vec2(), 3, 0, 0, .3, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(.8,1,1,.6), new Color(.5,.5,1,.2), // colorStartA, colorStartB
new Color(.8,1,1,.6), new Color(.5,.5,1,.2), // colorEndA, colorEndB
2, .1, .1, .2, 0, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
.99, 1, .5, PI, .2, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 1 // randomness, collide, additive, randomColorLinear, renderOrder
);
skyParticles.elasticity = .2;
skyParticles.trailScale = 2;
}
else
{
// snow
skyParticles = new ParticleEmitter(
vec2(), 3, 0, 0, .5, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(1,1,1,.8), new Color(1,1,1,.2), // colorStartA, colorStartB
new Color(1,1,1,.8), new Color(1,1,1,.2), // colorEndA, colorEndB
3, .1, .1, .3, .01, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
.98, 1, .2, PI, .2, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 1 // randomness, collide, additive, randomColorLinear, renderOrder
);
}
skyParticles.emitRate = precipitationEnable && rand()<.5 ? rand(500) : 0;
skyParticles.angle = PI+rand(.5,-.5);
}
}
function nextLevel()
{
playerLives += 4; // three for beating a level plus 1 for respawning
levelEnemyCount = 15 + min(level * 30, 300);
++level;
levelSeed = randSeed = rand(1e9)|0;
levelSize = vec2(min(level*99,400),200);
levelColor = randColor(new Color(.2,.2,.2), new Color(.8,.8,.8));
levelSkyColor = randColor(new Color(.5,.5,.5), new Color(.9,.9,.9));
levelSkyHorizonColor = levelSkyColor.subtract(new Color(.05,.05,.05)).mutate(.3).clamp();
levelGroundColor = levelColor.mutate().add(new Color(.3,.3,.3)).clamp();
// keep trying until a valid level is generated
for(;generateLevel(););
// warm up level
levelWarmup = 1;
// objects that effect the level must be added here
const firstCheckpoint = new Checkpoint(checkpointPos).setActive();
applyArtToLevel();
const warmUpTime = 2;
for(let i=warmUpTime * FPS; i--;)
{
updateSky();
engineUpdateObjects();
}
levelWarmup = 0;
// destroy any objects that are stuck in collision
forEachObject(0, 0, (o)=>
{
if (o.isGameObject && o != firstCheckpoint)
{
const checkBackground = o.isCheckpoint;
(checkBackground ? getTileBackgroundData(o.pos) > 0 : tileCollisionTest(o.pos,o.size)) && o.destroy();
}
});
// hack, subtract off warm up time from main game timer
//gameTimer.time += warmUpTime;
levelTimer.set();
// spawn player
players = [];
new Player(checkpointPos);
//new Enemy(checkpointPos.add(vec2(3))); // test enemy
}
================================================
FILE: appObjects.js
================================================
/*
Javascript Space Game
By Frank Force 2021
*/
'use strict';
class GameObject extends EngineObject
{
constructor(pos, size, tileIndex, tileSize, angle)
{
super(pos, size, tileIndex, tileSize, angle);
this.isGameObject = 1;
this.health = this.healthMax = 0;
this.burnDelay = .1;
this.burnTime = 3;
this.damageTimer = new Timer;
this.burnDelayTimer = new Timer;
this.burnTimer = new Timer;
this.extinguishTimer = new Timer;
this.color = new Color;
this.additiveColor = new Color(0,0,0,0);
}
inUpdateWindow() { return levelWarmup || isOverlapping(this.pos, this.size, cameraPos, updateWindowSize); }
update()
{
if (this.parent || this.persistent || !this.groundObject || this.inUpdateWindow()) // pause physics if outside update window
super.update();
if (!this.isLavaRock)
{
if (!this.isDead() && this.damageTimer.isSet())
{
// flash white when damaged
const a = .5*percent(this.damageTimer.get(), 0, .15);
this.additiveColor = new Color(a,a,a,0);
}
else
this.additiveColor = new Color(0,0,0,0);
}
if (!this.parent && this.pos.y < -1)
{
// kill and destroy if fall below level
this.kill();
this.persistent || this.destroy();
}
else if (this.burnTime)
{
if (this.burnTimer.isSet())
{
// burning
if (this.burnTimer.elapsed())
{
this.kill();
if (this.fireEmitter)
this.fireEmitter.emitRate = 0;
}
else if (rand() < .01)
{
// random chance to spread fire
const spreadRadius = 2;
debugFire && debugCircle(this.pos, spreadRadius, '#f00', 1);
forEachObject(this.pos, spreadRadius, (o)=>o.isGameObject && o.burn());
}
}
else if (this.burnDelayTimer.elapsed())
{
// finished waiting to burn
this.burn(1);
}
}
}
render()
{
drawTile(this.pos, this.size, this.tileIndex, this.tileSize, this.color.scale(this.burnColorPercent(),1), this.angle, this.mirror, this.additiveColor);
}
burnColorPercent() { return lerp(this.burnTimer.getPercent(), .2, 1); }
burn(instant)
{
if (!this.canBurn || this.burnTimer.isSet() || this.extinguishTimer.active())
return;
if (godMode && this.isPlayer)
return;
if (this.team == team_player)
{
// safety window after spawn
if (godMode || this.getAliveTime() < 2)
return;
}
if (instant)
{
this.burnTimer.set(this.burnTime*rand(1.5, 1));
this.fireEmitter = makeFire();
this.addChild(this.fireEmitter);
}
else
this.burnDelayTimer.isSet() || this.burnDelayTimer.set(this.burnDelay*rand(1.5, 1));
}
extinguish()
{
if (this.fireEmitter && this.fireEmitter.emitRate == 0)
return;
// stop burning
this.extinguishTimer.set(.1);
this.burnTimer.unset();
this.burnDelayTimer.unset();
if (this.fireEmitter)
this.fireEmitter.destroy();
this.fireEmitter = 0;
}
heal(health)
{
assert(health >= 0);
if (this.isDead())
return 0;
// apply healing and return amount healed
return this.health - (this.health = min(this.health + health, this.healthMax));
}
damage(damage, damagingObject)
{
ASSERT(damage >= 0);
if (this.isDead())
return 0;
// set damage timer;
this.damageTimer.set();
for(const child of this.children)
child.damageTimer && child.damageTimer.set();
// apply damage and kill if necessary
const newHealth = max(this.health - damage, 0);
if (!newHealth)
this.kill(damagingObject);
// set new health and return amount damaged
return this.health - (this.health = newHealth);
}
isDead() { return !this.health; }
kill(damagingObject) { this.destroy(); }
collideWithObject(o)
{
if (o.isLavaRock && this.canBurn)
{
if (levelWarmup)
{
this.destroy();
return 1;
}
this.burn();
}
return 1;
}
}
///////////////////////////////////////////////////////////////////////////////
const propType_crate_wood = 0;
const propType_crate_explosive = 1;
const propType_crate_metal = 2;
const propType_barrel_explosive = 3;
const propType_barrel_water = 4;
const propType_barrel_metal = 5;
const propType_barrel_highExplosive = 6;
const propType_rock = 7;
const propType_rock_lava = 8;
const propType_count = 9;
class Prop extends GameObject
{
constructor(pos, typeOverride)
{
super(pos);
const type = this.type = (typeOverride != undefined ? typeOverride : rand()**2*propType_count|0);
let health = 5;
this.tileIndex = 16;
this.explosionSize = 0;
if (this.type == propType_crate_wood)
{
this.color = new Color(1,.5,0);
this.canBurn = 1;
}
else if (this.type == propType_crate_metal)
{
this.color = new Color(.9,.9,1);
health = 10;
}
else if (this.type == propType_crate_explosive)
{
this.color = new Color(.2,.8,.2);
this.canBurn = 1;
this.explosionSize = 2;
health = 1e3;
}
else if (this.type == propType_barrel_metal)
{
this.tileIndex = 17;
this.color = new Color(.9,.9,1);
health = 10;
}
else if (this.type == propType_barrel_explosive)
{
this.tileIndex = 17;
this.color = new Color(.2,.8,.2);
this.canBurn = 1;
this.explosionSize = 2;
health = 1e3;
}
else if (this.type == propType_barrel_highExplosive)
{
this.tileIndex = 17;
this.color = new Color(1,.1,.1);
this.canBurn = 1;
this.explosionSize = 3;
this.burnTimeDelay = 0;
this.burnTime = rand(.5,.1);
health = 1e3;
}
else if (this.type == propType_barrel_water)
{
this.tileIndex = 17;
this.color = new Color(0,.6,1);
health = .01;
}
else if (this.type == propType_rock || this.type == propType_rock_lava)
{
this.tileIndex = 18;
this.color = new Color(.8,.8,.8).mutate(.2);
health = 30;
this.mass *= 4;
if (rand() < .2)
{
health = 99;
this.mass *= 4;
this.size = this.size.scale(2);
this.pos.y += .5;
}
this.isCrushing = 1;
if (this.type == propType_rock_lava)
{
this.color = new Color(1,.9,0);
this.additiveColor = new Color(1,0,0);
this.isLavaRock = 1;
}
}
// randomly angle and flip axis (90 degree rotation)
this.angle = (rand(4)|0)*PI/2;
if (rand() < .5)
this.size = this.size.flip();
this.mirror = rand() < .5;
this.health = this.healthMax = health;
this.setCollision(1, 1);
}
update()
{
const oldVelocity = this.velocity.copy();
super.update();
// apply collision damage
const deltaSpeedSquared = this.velocity.subtract(oldVelocity).lengthSquared();
deltaSpeedSquared > .05 && this.damage(2*deltaSpeedSquared);
}
damage(damage, damagingObject)
{
(this.explosionSize || this.type == propType_crate_wood && rand() < .1) && this.burn();
super.damage(damage, damagingObject);
}
kill()
{
if (this.destroyed) return;
if (this.type == propType_barrel_water)
makeWater(this.pos);
this.destroy();
makeDebris(this.pos, this.color.scale(this.burnColorPercent(),1));
this.explosionSize ?
explosion(this.pos, this.explosionSize) :
playSound(sound_destroyTile, this.pos);
}
}
///////////////////////////////////////////////////////////////////////////////
let checkpointPos, activeCheckpoint, checkpointTimer = new Timer;
class Checkpoint extends GameObject
{
constructor(pos)
{
super(pos.int().add(vec2(.5)))
this.renderOrder = tileRenderOrder-1;
this.isCheckpoint = 1;
for(let x=3;x--;)
for(let y=6;y--;)
setTileCollisionData(pos.subtract(vec2(x-1,1-y)), y ? tileType_empty : tileType_solid);
}
update()
{
if (!this.inUpdateWindow())
return; // ignore offscreen objects
// check if player is near
for(const player of players)
player && !player.isDead() && this.pos.distanceSquared(player.pos) < 1 && this.setActive();
}
setActive()
{
if (activeCheckpoint != this && !levelWarmup)
playSound(sound_checkpoint, this.pos);
checkpointPos = this.pos;
activeCheckpoint = this;
checkpointTimer.set(.1);
}
render()
{
// draw flag
const height = 4;
const color = activeCheckpoint == this ? new Color(1,0,0) : new Color;
const a = Math.sin(time*4+this.pos.x);
drawTile(this.pos.add(vec2(.5,height-.3-.5-.03*a)), vec2(1,.6), 14, undefined, color, a*.06);
drawRect(this.pos.add(vec2(0,height/2-.5)), vec2(.1,height), new Color(.9,.9,.9));
}
}
///////////////////////////////////////////////////////////////////////////////
class Grenade extends GameObject
{
constructor(pos)
{
super(pos, vec2(.2), 5, vec2(8));
this.health = this.healthMax = 1e3;
this.beepTimer = new Timer(1);
this.elasticity = .3;
this.friction = .9;
this.angleDamping = .96;
this.renderOrder = 1e8;
this.setCollision();
}
update()
{
super.update();
if (this.getAliveTime() > 3)
{
explosion(this.pos, 3);
this.destroy();
return;
}
if (this.beepTimer.elapsed())
{
playSound(sound_grenade, this.pos)
this.beepTimer.set(1);
}
alertEnemies(this.pos, this.pos);
}
render()
{
drawTile(this.pos, vec2(.5), this.tileIndex, this.tileSize, this.color, this.angle);
const a = this.getAliveTime();
setBlendMode(1);
drawTile(this.pos, vec2(2), 0, vec2(16), new Color(1,0,0,.2-.2*Math.cos(a*2*PI)));
drawTile(this.pos, vec2(1), 0, vec2(16), new Color(1,0,0,.2-.2*Math.cos(a*2*PI)));
drawTile(this.pos, vec2(.5), 0, vec2(16), new Color(1,1,1,.2-.2*Math.cos(a*2*PI)));
setBlendMode(0);
}
}
///////////////////////////////////////////////////////////////////////////////
class Weapon extends EngineObject
{
constructor(pos, parent)
{
super(pos, vec2(.6), 4, vec2(8));
// weapon settings
this.isWeapon = 1;
this.fireTimeBuffer = this.localAngle = 0;
this.recoilTimer = new Timer;
this.addChild(this.shellEmitter = new ParticleEmitter(
vec2(), 0, 0, 0, .1, // pos, emitSize, emitTime, emitRate, emiteCone
undefined, undefined, // tileIndex, tileSize
new Color(1,.8,.5), new Color(.9,.7,.5), // colorStartA, colorStartB
new Color(1,.8,.5), new Color(.9,.7,.5), // colorEndA, colorEndB
3, .1, .1, .15, .1, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
1, .95, 1, 0, 0, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.1, 1 // randomness, collide, additive, randomColorLinear, renderOrder
));
this.shellEmitter.elasticity = .5;
this.shellEmitter.particleDestroyCallback = persistentParticleDestroyCallback;
this.renderOrder = parent.renderOrder+1;
parent.weapon = this;
parent.addChild(this, this.localOffset = vec2(.55,0));
}
update()
{
super.update();
const fireRate = 8;
const bulletSpeed = .5;
const spread = .1;
this.mirror = this.parent.mirror;
this.fireTimeBuffer += timeDelta;
if (this.recoilTimer.active())
this.localAngle = lerp(this.recoilTimer.getPercent(), 0, this.localAngle);
if (this.triggerIsDown)
{
// slow down enemy bullets
const speed = bulletSpeed * (this.parent.isPlayer ? 1 : .5);
const rate = 1/fireRate;
for(; this.fireTimeBuffer > 0; this.fireTimeBuffer -= rate)
{
this.localAngle = -rand(.2,.15);
this.recoilTimer.set(rand(.4,.3));
const bullet = new Bullet(this.pos, this.parent);
const direction = vec2(this.getMirrorSign(speed), 0);
bullet.velocity = direction.rotate(rand(spread,-spread));
this.shellEmitter.localAngle = -.8*this.getMirrorSign();
this.shellEmitter.emitParticle();
playSound(sound_shoot, this.pos);
// alert enemies
this.parent.isPlayer && alertEnemies(this.pos, this.pos);
}
}
else
this.fireTimeBuffer = min(this.fireTimeBuffer, 0);
}
}
///////////////////////////////////////////////////////////////////////////////
class Bullet extends EngineObject
{
constructor(pos, attacker)
{
super(pos, vec2(0));
this.color = new Color(1,1,0,1);
this.lastVelocity = this.velocity;
this.setCollision();
this.damage = this.damping = 1;
this.gravityScale = 0;
this.attacker = attacker;
this.team = attacker.team;
this.renderOrder = 1e9;
this.range = 8;
}
update()
{
this.lastVelocity = this.velocity;
super.update();
this.range -= this.velocity.length();
if (this.range < 0)
{
const emitter = new ParticleEmitter(
this.pos, .2, .1, 100, PI, // pos, emitSize, emitTime, emitRate, emiteCone
0, undefined, // tileIndex, tileSize
new Color(1,1,0,.5), new Color(1,1,1,.5), // colorStartA, colorStartB
new Color(1,1,0,0), new Color(1,1,1,0), // colorEndA, colorEndB
.1, .5, .1, .1, .1, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
1, 1, .5, PI, .1, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 0, 1 // randomness, collide, additive, randomColorLinear, renderOrder
);
this.destroy();
return;
}
// check if hit someone
forEachObject(this.pos, this.size, (o)=>
{
if (o.isGameObject && !o.parent && o.team != this.team)
if (!o.dodgeTimer || !o.dodgeTimer.active())
this.collideWithObject(o)
});
}
collideWithObject(o)
{
if (o.isGameObject)
{
o.damage(this.damage, this);
o.applyForce(this.velocity.scale(.1));
if (o.isCharacter)
{
playSound(sound_walk, this.pos);
this.destroy();
}
else
this.kill();
}
return 1;
}
collideWithTile(data, pos)
{
if (data <= 0)
return 0;
const destroyTileChance = data == tileType_glass ? 1 : data == tileType_dirt ? .2 : .05;
rand() < destroyTileChance && destroyTile(pos);
this.kill();
return 1;
}
kill()
{
if (this.destroyed)
return;
const emitter = new ParticleEmitter(
this.pos, 0, .1, 100, .5, // pos, emitSize, emitTime, emitRate, emiteCone
undefined, undefined, // tileIndex, tileSize
new Color(1,1,0), new Color(1,0,0), // colorStartA, colorStartB
new Color(1,1,0), new Color(1,0,0), // colorEndA, colorEndB
.2, .2, 0, .1, .1, // particleTime, sizeStart, sizeEnd, particleSpeed, particleAngleSpeed
1, 1, .5, PI, .1, // damping, angleDamping, gravityScale, particleCone, fadeRate,
.5, 1, 1 // randomness, collide, additive, randomColorLinear, renderOrder
);
emitter.trailScale = 1;
emitter.angle = this.lastVelocity.angle() + PI;
emitter.elasticity = .3;
this.destroy();
}
render()
{
drawRect(this.pos, vec2(.4,.5), new Color(1,1,1,.5), this.velocity.angle());
drawRect(this.pos, vec2(.2,.5), this.color, this.velocity.angle());
}
}
================================================
FILE: engine/build/build.bat
================================================
rem SIMPLE BUILD SCRIPT FOR JS13k by FRANK FORCE
rem minfies and combines index.html and index.js and zips the result
set name=app
rem go to top of project
cd ..
cd ..
rem remove old files
del %name%.zip index.min.html
rmdir /s /q build
rem combine code
mkdir build
type engine\engineUtil.js >> build\index.js
echo.>> build\index.js
type engine\build\engineBuild.js >> build\index.js
echo.>> build\index.js
type engine\engine.js >> build\index.js
echo.>> build\index.js
type engine\engineAudio.js >> build\index.js
echo.>> build\index.js
type engine\engineObject.js >> build\index.js
echo.>> build\index.js
type engine\engineTileLayer.js >> build\index.js
echo.>> build\index.js
type engine\engineInput.js >> build\index.js
echo.>> build\index.js
type engine\engineParticle.js >> build\index.js
echo.>> build\index.js
type engine\engineWebGL.js >> build\index.js
echo.>> build\index.js
type engine\engineDraw.js >> build\index.js
echo.>> build\index.js
rem add app files to include here
type appObjects.js >> build\index.js
echo.>> build\index.js
type appCharacters.js >> build\index.js
echo.>> build\index.js
type appEffects.js >> build\index.js
echo.>> build\index.js
type appLevel.js >> build\index.js
echo.>> build\index.js
type app.js >> build\index.js
echo.>> build\index.js
rem minify code with closure
call google-closure-compiler --js build\index.js --js_output_file build\index.js --compilation_level ADVANCED --language_out ECMASCRIPT_2019 --warning_level VERBOSE --jscomp_off * --assume_function_wrapper
if %ERRORLEVEL% NEQ 0 (
pause
exit /b %ERRORLEVEL%
)
rem more minification with uglify or terser (they both are about the same)
call uglifyjs -o build\index.js --compress --mangle -- build\index.js
rem call terser -o build\index.js --compress --mangle -- build\index.js
if %ERRORLEVEL% NEQ 0 (
pause
exit /b %ERRORLEVEL%
)
rem roadroaller compresses the code better then zip
call roadroller build\index.js -o build\index.js
if %ERRORLEVEL% NEQ 0 (
pause
exit /b %ERRORLEVEL%
)
rem build the html
type engine\build\index.html >> build\index.html
echo ^<script^> >> build\index.html
type build\index.js >> build\index.html
echo ^</script^> >> build\index.html
rem minify the png
call imagemin tiles.png > build\tiles.png
if %ERRORLEVEL% NEQ 0 (
pause
exit /b %ERRORLEVEL%
)
rem zip the result
cd build
rem call advzip -a -4 -i 99 ..\%name%.zip index.html
call ..\ect -9 -strip -zip ..\%name%.zip index.html
if %ERRORLEVEL% NEQ 0 (
pause
exit /b %ERRORLEVEL%
)
rem remove build folder
copy index.html ..\index.min.html
cd ..
rmdir /s /q build
rem pause to see result ect -9 -strip -zip js13k.zip index.html
================================================
FILE: engine/build/build.html
================================================
<body>
================================================
FILE: engine/build/engineBuild.js
================================================
/*
LittleJS - Build include file
By Frank Force 2021
This file is automatically included first by the build system.
*/
'use strict';
const debug = 0;
const showWatermark = 0;
const godMode = 0;
const debugOverlay = 0;
const debugPhysics = 0;
const debugParticles = 0;
// allow debug commands to be removed from the final build
const ASSERT = ()=> {}
const debugPoint = ()=> {}
const debugRect = ()=> {}
const debugLine = ()=> {}
const debugInit = ()=> {}
const debugUpdate = ()=> {}
const debugRender = ()=> {}
================================================
FILE: engine/build/index.html
================================================
<body>
================================================
FILE: engine/build/setupBuild.bat
================================================
rem install these command line tools if necessary
npm install -g google-closure-compiler
npm install -g terser
npm install -g uglify
npm install -g roadroller
npm install --global imagemin-cli
npm install -g advzip-bin
================================================
FILE: engine/engine.js
================================================
/*
LittleJS - The Little JavaScript Game Engine That Can - By Frank Force 2021
Engine Features
- Engine and debug system are separate from game code
- Object oriented with base class engine object
- Engine handles core update loop
- Base class object handles update, physics, collision, rendering, etc
- Engine helper classes and functions like Vector2, Color, and Timer
- Super fast rendering system for tile sheets
- Sound effects audio with zzfx and music with zzfxm
- Input processing system with gamepad and touchscreen support
- Tile layer rendering and collision system
- Particle effect system
- Automatically calls appInit(), appUpdate(), appUpdatePost(), appRender(), appRenderPost()
- Debug tools and debug rendering system
- Call engineInit() to start it up!
*/
'use strict';
///////////////////////////////////////////////////////////////////////////////
// engine config
const engineName = 'LittleJS';
const engineVersion = 'v0.74';
const FPS = 60, timeDelta = 1/FPS;
const defaultFont = 'arial'; // font used for text rendering
const maxWidth = 1920, maxHeight = 1200; // up to 1080p and 16:10
const fixedWidth = 0; // native resolution
//const fixedWidth = 1280, fixedHeight = 720; // 720p
//const fixedWidth = 128, fixedHeight = 128; // PICO-8
//const fixedWidth = 240, fixedHeight = 136; // TIC-80
// tile sheet settings
//const defaultTilesFilename = 'a.png'; // everything goes in one tile sheet
const defaultTileSize = vec2(16); // default size of tiles in pixels
const tileBleedShrinkFix = .3; // prevent tile bleeding from neighbors
const pixelated = 1; // use crisp pixels for pixel art
///////////////////////////////////////////////////////////////////////////////
// core engine
const gravity = -.01;
let mainCanvas=0, mainContext=0, mainCanvasSize=vec2();
let engineObjects=[], engineCollideObjects=[];
let frame=0, time=0, realTime=0, paused=0, frameTimeLastMS=0, frameTimeBufferMS=0, debugFPS=0;
let cameraPos=vec2(), cameraScale=4*max(defaultTileSize.x, defaultTileSize.y);
let tileImageSize, tileImageSizeInverse, shrinkTilesX, shrinkTilesY, drawCount;
const tileImage = new Image(); // the tile image used by everything
function engineInit(appInit, appUpdate, appUpdatePost, appRender, appRenderPost)
{
// init engine when tiles load
tileImage.onload = ()=>
{
// save tile image info
tileImageSizeInverse = vec2(1).divide(tileImageSize = vec2(tileImage.width, tileImage.height));
debug && (tileImage.onload=()=>ASSERT(1)); // tile sheet can not reloaded
shrinkTilesX = tileBleedShrinkFix/tileImageSize.x;
shrinkTilesY = tileBleedShrinkFix/tileImageSize.y;
// setup html
document.body.appendChild(mainCanvas = document.createElement('canvas'));
document.body.style = 'margin:0;overflow:hidden;background:#000';
mainCanvas.style = 'position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);image-rendering:crisp-edges;image-rendering:pixelated'; // pixelated rendering
mainContext = mainCanvas.getContext('2d');
debugInit();
glInit();
appInit();
engineUpdate();
};
// main update loop
const engineUpdate = (frameTimeMS=0)=>
{
requestAnimationFrame(engineUpdate);
if (!document.hasFocus())
inputData[0].length = 0; // clear input when lost focus
// prepare to update time
const realFrameTimeDeltaMS = frameTimeMS - frameTimeLastMS;
let frameTimeDeltaMS = realFrameTimeDeltaMS;
frameTimeLastMS = frameTimeMS;
realTime = frameTimeMS / 1e3;
if (debug)
frameTimeDeltaMS *= keyIsDown(107) ? 5 : keyIsDown(109) ? .2 : 1;
if (!paused)
frameTimeBufferMS += frameTimeDeltaMS;
// update frame
mousePosWorld = screenToWorld(mousePosScreen);
updateGamepads();
// apply time delta smoothing, improves smoothness of framerate in some browsers
let deltaSmooth = 0;
if (frameTimeBufferMS < 0 && frameTimeBufferMS > -9)
{
// force an update each frame if time is close enough (not just a fast refresh rate)
deltaSmooth = frameTimeBufferMS;
frameTimeBufferMS = 0;
//debug && frameTimeBufferMS < 0 && console.log('time smoothing: ' + -deltaSmooth);
}
//debug && frameTimeBufferMS < 0 && console.log('skipped frame! ' + -frameTimeBufferMS);
// clamp incase of extra long frames (slow framerate)
frameTimeBufferMS = min(frameTimeBufferMS, 50);
// update the frame
for (;frameTimeBufferMS >= 0; frameTimeBufferMS -= 1e3 / FPS)
{
// main frame update
appUpdate();
engineUpdateObjects();
appUpdatePost();
debugUpdate();
// update input
for(let deviceInputData of inputData)
deviceInputData.map(k=> k.r = k.p = 0);
mouseWheel = 0;
}
// add the smoothing back in
frameTimeBufferMS += deltaSmooth;
if (fixedWidth)
{
// clear and fill window if smaller
mainCanvas.width = fixedWidth;
mainCanvas.height = fixedHeight;
// fit to window width if smaller
const fixedAspect = fixedWidth / fixedHeight;
const aspect = innerWidth / innerHeight;
mainCanvas.style.width = aspect < fixedAspect ? '100%' : '';
mainCanvas.style.height = aspect < fixedAspect ? '' : '100%';
}
else
{
// fill the window
mainCanvas.width = min(innerWidth, maxWidth);
mainCanvas.height = min(innerHeight, maxHeight);
}
// save canvas size
mainCanvasSize = vec2(mainCanvas.width, mainCanvas.height);
mainContext.imageSmoothingEnabled = !pixelated; // disable smoothing for pixel art
// render sort then render while removing destroyed objects
glPreRender(mainCanvas.width, mainCanvas.height);
appRender();
engineObjects.sort((a,b)=> a.renderOrder - b.renderOrder);
for(const o of engineObjects)
o.destroyed || o.render();
glCopyToContext(mainContext);
appRenderPost();
debugRender();
if (showWatermark)
{
// update fps
debugFPS = lerp(.05, 1e3/(realFrameTimeDeltaMS||1), debugFPS);
mainContext.textAlign = 'right';
mainContext.textBaseline = 'top';
mainContext.font = '1em monospace';
mainContext.fillStyle = '#000';
const text = engineName + ' ' + engineVersion + ' / '
+ drawCount + ' / ' + engineObjects.length + ' / ' + debugFPS.toFixed(1);
mainContext.fillText(text, mainCanvas.width-3, 3);
mainContext.fillStyle = '#fff';
mainContext.fillText(text, mainCanvas.width-2,2);
drawCount = 0;
}
// copy anything left in the buffer if necessary
glCopyToContext(mainContext);
}
//tileImage.src = 'tiles.png';
tileImage.src =
`data:image/png;base64,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`;
}
function engineUpdateObjects()
{
// recursive object update
const updateObject = (o)=>
{
if (!o.destroyed)
{
o.update();
for(const child of o.children)
updateObject(child);
}
}
for(const o of engineObjects)
o.parent || updateObject(o);
engineObjects = engineObjects.filter(o=>!o.destroyed);
engineCollideObjects = engineCollideObjects.filter(o=>!o.destroyed);
time = ++frame / FPS;
}
function forEachObject(pos, size=0, callbackFunction=(o)=>1, collideObjectsOnly=1)
{
const objectList = collideObjectsOnly ? engineCollideObjects : engineObjects;
if (!size)
{
// no overlap test
for (const o of objectList)
callbackFunction(o);
}
else if (size.x != undefined)
{
// aabb test
for (const o of objectList)
isOverlapping(pos, size, o.pos, o.size) && callbackFunction(o);
}
else
{
// circle test
const sizeSquared = size**2;
for (const o of objectList)
pos.distanceSquared(o.pos) < sizeSquared && callbackFunction(o);
}
}
================================================
FILE: engine/engineAudio.js
================================================
/*
LittleJS Audio System
- Speech Synthesis
- ZzFX Sound Effects
- ZzFXM Music
- Can attenuate zzfx sounds by camera range
*/
'use strict';
const soundEnable = 1; // all audio can be disabled
const defaultSoundRange = 15;// distance where taper starts
const soundTaperPecent = .5; // extra range added for sound taper
const audioVolume = .5; // volume for sound, music and speech
let audioContext; // main audio context
///////////////////////////////////////////////////////////////////////////////
// play a zzfx sound in world space with attenuation and culling
function playSound(zzfxSound, pos, range=defaultSoundRange, volumeScale=1)
{
if (!soundEnable) return;
const lengthSquared = cameraPos.distanceSquared(pos);
const maxRange = range * (soundTaperPecent + 1);
if (lengthSquared > maxRange**2)
return;
// copy sound (so volume scale isnt permanant)
zzfxSound = [...zzfxSound];
// scale volume
const scale = volumeScale * percent(lengthSquared**.5, range, maxRange);
zzfxSound[0] = (zzfxSound[0]||1) * scale;
zzfx(...zzfxSound);
}
// render and play zzfxm music with an option to loop
function playMusic(zzfxmMusic, loop=1)
{
if (!soundEnable) return;
const source = zzfxP(...zzfxM(...zzfxmMusic));
source && (source.loop = loop);
return source;
}
///////////////////////////////////////////////////////////////////////////////
// speak text with passed in settings
function speak(text, language='', volume=1, rate=1, pitch=1)
{
if (!soundEnable || !speechSynthesis) return;
// common languages (not supported by all browsers)
// en - english, it - italian, fr - french, de - german, es - spanish
// ja - japanese, ru - russian, zh - chinese, hi - hindi, ko - korean
// build utterance and speak
const utterance = new SpeechSynthesisUtterance(text);
utterance.lang = language;
utterance.volume = volume*audioVolume*3;
utterance.rate = rate;
utterance.pitch = pitch;
speechSynthesis.speak(utterance);
}
const stopSpeech = ()=> speechSynthesis && speechSynthesis.cancel();
///////////////////////////////////////////////////////////////////////////////
// ZzFXMicro - Zuper Zmall Zound Zynth - v1.1.8 by Frank Force
const zzfxR = 44100; // sample rate
function zzfx(
// parameters
volume = 1, randomness = .05, frequency = 220, attack = 0, sustain = 0,
release = .1, shape = 0, shapeCurve = 1, slide = 0, deltaSlide = 0,
pitchJump = 0, pitchJumpTime = 0, repeatTime = 0, noise = 0, modulation = 0,
bitCrush = 0, delay = 0, sustainVolume = 1, decay = 0, tremolo = 0
)
{
// wait for user input to create audio context
if (!soundEnable || !hadInput) return;
// init parameters
let PI2 = PI*2, sign = v => v>0?1:-1,
startSlide = slide *= 500 * PI2 / zzfxR / zzfxR, b=[],
startFrequency = frequency *= (1 + randomness*2*Math.random() - randomness) * PI2 / zzfxR,
t=0, tm=0, i=0, j=1, r=0, c=0, s=0, f, length;
// scale by sample rate
attack = attack * zzfxR + 9; // minimum attack to prevent pop
decay *= zzfxR;
sustain *= zzfxR;
release *= zzfxR;
delay *= zzfxR;
deltaSlide *= 500 * PI2 / zzfxR**3;
modulation *= PI2 / zzfxR;
pitchJump *= PI2 / zzfxR;
pitchJumpTime *= zzfxR;
repeatTime = repeatTime * zzfxR | 0;
// generate waveform
for(length = attack + decay + sustain + release + delay | 0;
i < length; b[i++] = s)
{
if (!(++c%(bitCrush*100|0))) // bit crush
{
s = shape? shape>1? shape>2? shape>3? // wave shape
Math.sin((t%PI2)**3) : // 4 noise
Math.max(Math.min(Math.tan(t),1),-1): // 3 tan
1-(2*t/PI2%2+2)%2: // 2 saw
1-4*abs(Math.round(t/PI2)-t/PI2): // 1 triangle
Math.sin(t); // 0 sin
s = (repeatTime ?
1 - tremolo + tremolo*Math.sin(PI2*i/repeatTime) // tremolo
: 1) *
sign(s)*(abs(s)**shapeCurve) * // curve 0=square, 2=pointy
volume * audioVolume * ( // envelope
i < attack ? i/attack : // attack
i < attack + decay ? // decay
1-((i-attack)/decay)*(1-sustainVolume) : // decay falloff
i < attack + decay + sustain ? // sustain
sustainVolume : // sustain volume
i < length - delay ? // release
(length - i - delay)/release * // release falloff
sustainVolume : // release volume
0); // post release
s = delay ? s/2 + (delay > i ? 0 : // delay
(i<length-delay? 1 : (length-i)/delay) * // release delay
b[i-delay|0]/2) : s; // sample delay
}
f = (frequency += slide += deltaSlide) * // frequency
Math.cos(modulation*tm++); // modulation
t += f - f*noise*(1 - (Math.sin(i)+1)*1e9%2); // noise
if (j && ++j > pitchJumpTime) // pitch jump
{
frequency += pitchJump; // apply pitch jump
startFrequency += pitchJump; // also apply to start
j = 0; // reset pitch jump time
}
if (repeatTime && !(++r % repeatTime)) // repeat
{
frequency = startFrequency; // reset frequency
slide = startSlide; // reset slide
j = j || 1; // reset pitch jump time
}
}
// create audio context
if (!audioContext)
audioContext = new (window.AudioContext||webkitAudioContext);
// create buffer and source
const buffer = audioContext.createBuffer(1, b.length, zzfxR),
source = audioContext.createBufferSource();
// copy samples to buffer and play
buffer.getChannelData(0).set(b);
source.buffer = buffer;
source.connect(audioContext.destination);
source.start();
return source;
}
///////////////////////////////////////////////////////////////////////////////
// ZzFX Music Renderer v2.0.3 by Keith Clark and Frank Force
///////////////////////////////////////////////////////////////////////////////
// ZzFX Music Renderer v2.0.3 by Keith Clark and Frank Force
function zzfxM(instruments, patterns, sequence, BPM = 125)
{
if (!soundEnable) return;
let instrumentParameters;
let i;
let j;
let k;
let note;
let sample;
let patternChannel;
let notFirstBeat;
let stop;
let instrument;
let pitch;
let attenuation;
let outSampleOffset;
let isSequenceEnd;
let sampleOffset = 0;
let nextSampleOffset;
let sampleBuffer = [];
let leftChannelBuffer = [];
let rightChannelBuffer = [];
let channelIndex = 0;
let panning = 0;
let hasMore = 1;
let sampleCache = {};
let beatLength = zzfxR / BPM * 60 >> 2;
// for each channel in order until there are no more
for(; hasMore; channelIndex++) {
// reset current values
sampleBuffer = [hasMore = notFirstBeat = pitch = outSampleOffset = 0];
// for each pattern in sequence
sequence.map((patternIndex, sequenceIndex) => {
// get pattern for current channel, use empty 1 note pattern if none found
patternChannel = patterns[patternIndex][channelIndex] || [0, 0, 0];
// check if there are more channels
hasMore |= !!patterns[patternIndex][channelIndex];
// get next offset, use the length of first channel
nextSampleOffset = outSampleOffset + (patterns[patternIndex][0].length - 2 - !notFirstBeat) * beatLength;
// for each beat in pattern, plus one extra if end of sequence
isSequenceEnd = sequenceIndex == sequence.length - 1;
for (i = 2, k = outSampleOffset; i < patternChannel.length + isSequenceEnd; notFirstBeat = ++i) {
// <channel-note>
note = patternChannel[i];
// stop if end, different instrument or new note
stop = i == patternChannel.length + isSequenceEnd - 1 && isSequenceEnd ||
instrument != (patternChannel[0] || 0) | note | 0;
// fill buffer with samples for previous beat, most cpu intensive part
for (j = 0; j < beatLength && notFirstBeat;
// fade off attenuation at end of beat if stopping note, prevents clicking
j++ > beatLength - 99 && stop ? attenuation += (attenuation < 1) / 99 : 0
) {
// copy sample to stereo buffers with panning
sample = (1 - attenuation) * sampleBuffer[sampleOffset++] / 2 || 0;
leftChannelBuffer[k] = (leftChannelBuffer[k] || 0) - sample * panning + sample;
rightChannelBuffer[k] = (rightChannelBuffer[k++] || 0) + sample * panning + sample;
}
// set up for next note
if (note) {
// set attenuation
attenuation = note % 1;
panning = patternChannel[1] || 0;
if (note |= 0) {
// get cached sample
sampleBuffer = sampleCache[
[
instrument = patternChannel[sampleOffset = 0] || 0,
note
]
] = sampleCache[[instrument, note]] || (
// add sample to cache
instrumentParameters = [...instruments[instrument]],
instrumentParameters[2] *= 2 ** ((note - 12) / 12),
// allow negative values to stop notes
note > 0 ? zzfxG(...instrumentParameters) : []
);
}
}
}
// update the sample offset
outSampleOffset = nextSampleOffset;
});
}
return [leftChannelBuffer, rightChannelBuffer];
}
================================================
FILE: engine/engineDebug.js
================================================
/*
LittleJS Debug System
Debug Features
- debug console
- debug rendering
- debug controls
- save snapshot
*/
'use strict';
const debug = 1;
const enableAsserts = 1;
const debugPointSize = .5;
let showWatermark = 1;
let godMode = 0;
let debugRects = [];
let debugOverlay = 0;
let debugPhysics = 0;
let debugParticles = 0;
let debugCanvas = -1;
let debugTakeScreenshot;
let downloadLink;
// debug helper functions
const ASSERT = enableAsserts ? (...assert)=> console.assert(...assert) : ()=>{};
const debugRect = (pos, size=0, color='#fff', time=0, angle=0, fill=0)=>
{
ASSERT(typeof color == 'string'); // pass in regular html strings as colors
debugRects.push({pos, size, color, time:new Timer(time), angle, fill});
}
const debugCircle = (pos, radius, color, time, fill=0)=> debugRect(pos, radius, color, time, fill);
const debugPoint = (pos, color, time, angle)=> debugRect(pos, 0, color, time, angle);
const debugLine = (posA, posB, color, thickness=.1, time)=>
{
const halfDelta = vec2((posB.x - posA.x)*.5, (posB.y - posA.y)*.5);
const size = vec2(thickness, halfDelta.length()*2);
debugRect(posA.add(halfDelta), size, color, time, halfDelta.angle(), 1);
}
const debugSaveCanvas = (canvas, filename = engineName + '.png') =>
{
downloadLink.download = "screenshot.png";
downloadLink.href = canvas.toDataURL('image/png').replace('image/png','image/octet-stream');
downloadLink.click();
}
const debugAABB = (pA, pB, sA, sB, color)=>
{
const minPos = vec2(min(pA.x - sA.x/2, pB.x - sB.x/2), min(pA.y - sA.y/2, pB.y - sB.y/2));
const maxPos = vec2(max(pA.x + sA.x/2, pB.x + sB.x/2), max(pA.y + sA.y/2, pB.y + sB.y/2));
debugRect(minPos.lerp(maxPos,.5), maxPos.subtract(minPos), color);
}
///////////////////////////////////////////////////////////////////////////////
// engine debug function (called automatically)
const debugInit = ()=>
{
// create link for saving screenshots
document.body.appendChild(downloadLink = document.createElement('a'));
downloadLink.style.display = 'none';
}
const debugUpdate = ()=>
{
if (!debug)
return;
if (keyWasPressed(192)) // ~
{
debugOverlay = !debugOverlay;
}
if (keyWasPressed(49)) // 1
{
debugPhysics = !debugPhysics;
debugParticles = 0;
}
if (keyWasPressed(50)) // 2
{
debugParticles = !debugParticles;
debugPhysics = 0;
}
if (keyWasPressed(51)) // 3
{
godMode = !godMode;
}
if (keyWasPressed(53)) // 5
{
debugTakeScreenshot = 1;
}
if (keyWasPressed(54)) // 6
{
//debugToggleParticleEditor();
//debugPhysics = debugParticles = 0;
}
if (keyWasPressed(55)) // 7
{
}
if (keyWasPressed(56)) // 8
{
}
if (keyWasPressed(57)) // 9
{
}
if (keyWasPressed(48)) // 0
{
showWatermark = !showWatermark;
}
// asserts to check for things that could go wrong
ASSERT(gravity <= 0) // only supports downward gravity
}
const debugRender = ()=>
{
if (debugTakeScreenshot)
{
debugSaveCanvas(mainCanvas);
debugTakeScreenshot = 0;
}
if (debugOverlay)
{
for(const o of engineObjects)
{
if (o.canvas)
continue; // skip tile layers
const size = o.size.copy();
size.x = max(size.x, .2);
size.y = max(size.y, .2);
const color = new Color(
o.collideTiles?1:0,
o.collideSolidObjects?1:0,
o.isSolid?1:0,
o.parent ? .2 : .5);
// show object info
drawRect(o.pos, size, color);
drawRect(o.pos, size.scale(.8), o.parent ? new Color(1,1,1,.5) : new Color(0,0,0,.8));
o.parent && drawLine(o.pos, o.parent.pos, .1, new Color(0,0,1,.5));
}
// mouse pick
let bestDistance = Infinity, bestObject;
for(const o of engineObjects)
{
const distance = mousePosWorld.distanceSquared(o.pos);
if (distance < bestDistance)
{
bestDistance = distance;
bestObject = o
}
}
if (bestObject)
{
const raycastHitPos = tileCollisionRaycast(bestObject.pos, mousePosWorld);
raycastHitPos && drawRect(raycastHitPos.int().add(vec2(.5)), vec2(1), new Color(0,1,1,.3));
drawRect(mousePosWorld.int().add(vec2(.5)), vec2(1), new Color(0,0,1,.5));
drawLine(mousePosWorld, bestObject.pos, .1, !raycastHitPos ? new Color(0,1,0,.5) : new Color(1,0,0,.5));
let pos = mousePosWorld.copy(), height = vec2(0,.5);
const printVec2 = (v)=> '(' + (v.x>0?' ':'') + (v.x).toFixed(2) + ',' + (v.y>0?' ':'') + (v.y).toFixed(2) + ')';
const args = [.5, new Color, .05, undefined, undefined, 'monospace'];
drawText('pos = ' + printVec2(bestObject.pos)
+ (bestObject.angle>0?' ':' ') + (bestObject.angle*180/PI).toFixed(1) + '°',
pos = pos.add(height), ...args);
drawText('vel = ' + printVec2(bestObject.velocity), pos = pos.add(height), ...args);
drawText('size = ' + printVec2(bestObject.size), pos = pos.add(height), ...args);
drawText('collision = ' + getTileCollisionData(mousePosWorld), pos = mousePosWorld.subtract(height), ...args);
}
glCopyToContext(mainContext);
}
{
// render debug rects
mainContext.lineWidth = 1;
const pointSize = debugPointSize * cameraScale;
debugRects.forEach(r=>
{
// create canvas transform from world space to screen space
const pos = worldToScreen(r.pos);
mainContext.save();
mainContext.lineWidth = 2;
mainContext.translate(pos.x|0, pos.y|0);
mainContext.rotate(r.angle);
mainContext.fillStyle = mainContext.strokeStyle = r.color;
if (r.size == 0 || r.size.x === 0 && r.size.y === 0 )
{
// point
mainContext.fillRect(-pointSize/2, -1, pointSize, 3),
mainContext.fillRect(-1, -pointSize/2, 3, pointSize);
}
else if (r.size.x != undefined)
{
// rect
const w = r.size.x*cameraScale|0, h = r.size.y*cameraScale|0;
r.fill && mainContext.fillRect(-w/2|0, -h/2|0, w, h),
mainContext.strokeRect(-w/2|0, -h/2|0, w, h);
}
else
{
// circle
mainContext.beginPath();
mainContext.arc(0, 0, r.size*cameraScale, 0, 9);
r.fill && mainContext.fill();
mainContext.stroke();
}
mainContext.restore();
});
mainContext.fillStyle = mainContext.strokeStyle = '#fff';
}
{
let x = 9, y = -20, h = 30;
mainContext.fillStyle = '#fff';
mainContext.textAlign = 'left';
mainContext.textBaseline = 'top';
mainContext.font = '28px monospace';
mainContext.shadowColor = '#000';
mainContext.shadowBlur = 9;
if (debugOverlay)
{
mainContext.fillText(engineName, x, y += h);
mainContext.fillText('Objects: ' + engineObjects.length, x, y += h);
mainContext.fillText('Time: ' + formatTime(time), x, y += h);
mainContext.fillText('---------', x, y += h);
mainContext.fillStyle = '#f00';
mainContext.fillText('~: Debug Overlay', x, y += h);
mainContext.fillStyle = debugPhysics ? '#f00' : '#fff';
mainContext.fillText('1: Debug Physics', x, y += h);
mainContext.fillStyle = debugParticles ? '#f00' : '#fff';
mainContext.fillText('2: Debug Particles', x, y += h);
mainContext.fillStyle = godMode ? '#f00' : '#fff';
mainContext.fillText('3: God Mode', x, y += h);
mainContext.fillStyle = '#fff';
mainContext.fillText('5: Save Screenshot', x, y += h);
//mainContext.fillStyle = debugParticleEditor ? '#f00' : '#fff';
//mainContext.fillText('6: Particle Editor', x, y += h);
}
else
{
mainContext.fillText(debugPhysics ? 'Debug Physics' : '', x, y += h);
mainContext.fillText(debugParticles ? 'Debug Particles' : '', x, y += h);
mainContext.fillText(godMode ? 'God Mode' : '', x, y += h);
}
mainContext.shadowBlur = 0;
}
debugRects = debugRects.filter(r=>!r.time.elapsed());
}
///////////////////////////////////////////////////////////////////////////////
// particle system editor
let debugParticleEditor = 0, debugParticleSystem, debugParticleSystemDiv, particleSystemCode;
const debugToggleParticleEditor = ()=>
{
debugParticleEditor = !debugParticleEditor;
if (debugParticleEditor)
{
if (!debugParticleSystem || debugParticleSystem.destroyed)
debugParticleSystem = new ParticleEmitter(cameraPos);
}
else if (debugParticleSystem && !debugParticleSystem.destroyed)
debugParticleSystem.destroy();
const colorToHex = (color)=>
{
const componentToHex = (c)=>
{
const hex = (c*255|0).toString(16);
return hex.length == 1 ? "0" + hex : hex;
}
return "#" + componentToHex(color.r) + componentToHex(color.g) + componentToHex(color.b);
}
const hexToColor = (hex)=>
{
return new Color(
parseInt(hex.substr(1,2), 16)/255,
parseInt(hex.substr(3,2), 16)/255,
parseInt(hex.substr(5,2), 16)/255)
}
if (!debugParticleSystemDiv)
{
const div = debugParticleSystemDiv = document.createElement('div');
div.innerHTML = '<big><b>Particle Editor';
div.style = 'position:absolute;top:10;left:10;color:#fff';
document.body.appendChild(div);
for( const setting of debugParticleSettings)
{
const input = setting[2] = document.createElement('input');
const name = setting[0];
const type = setting[1];
if (type)
{
if (type == 'color')
{
input.type = type;
const color = debugParticleSystem[name];
input.value = colorToHex(color);
}
else if (type == 'alpha' && name == 'colorStartAlpha')
input.value = debugParticleSystem.colorStartA.a;
else if (type == 'alpha' && name == 'colorEndAlpha')
input.value = debugParticleSystem.colorEndA.a;
else if (name == 'tileSizeX')
input.value = debugParticleSystem.tileSize.x;
else if (name == 'tileSizeY')
input.value = debugParticleSystem.tileSize.y;
}
else
input.value = debugParticleSystem[name] || '0';
input.oninput = (e)=>
{
const inputFloat = parseFloat(input.value) || 0;
if (type)
{
if (type == 'color')
{
const color = hexToColor(input.value);
debugParticleSystem[name].r = color.r;
debugParticleSystem[name].g = color.g;
debugParticleSystem[name].b = color.b;
}
else if (type == 'alpha' && name == 'colorStartAlpha')
{
debugParticleSystem.colorStartA.a = clamp(inputFloat);
debugParticleSystem.colorStartB.a = clamp(inputFloat);
}
else if (type == 'alpha' && name == 'colorEndAlpha')
{
debugParticleSystem.colorEndA.a = clamp(inputFloat);
debugParticleSystem.colorEndB.a = clamp(inputFloat);
}
else if (name == 'tileSizeX')
{
debugParticleSystem.tileSize = vec2(parseInt(input.value), debugParticleSystem.tileSize.y);
}
else if (name == 'tileSizeY')
{
debugParticleSystem.tileSize.y = vec2(debugParticleSystem.tileSize.x, parseInt(input.value));
}
}
else
debugParticleSystem[name] = inputFloat;
updateCode();
}
div.appendChild(document.createElement('br'));
div.appendChild(input);
div.appendChild(document.createTextNode(' ' + name));
}
div.appendChild(document.createElement('br'));
div.appendChild(document.createElement('br'));
div.appendChild(particleSystemCode = document.createElement('input'));
particleSystemCode.disabled = true;
div.appendChild(document.createTextNode(' code'));
div.appendChild(document.createElement('br'));
const button = document.createElement('button')
div.appendChild(button);
button.innerHTML = 'Copy To Clipboard';
button.onclick = (e)=> navigator.clipboard.writeText(particleSystemCode.value);
const updateCode = ()=>
{
let code = '';
let count = 0;
for( const setting of debugParticleSettings)
{
const name = setting[0];
const type = setting[1];
let value;
if (name == 'tileSizeX' || type == 'alpha')
continue;
if (count++)
code += ', ';
if (name == 'tileSizeY')
{
value = `vec2(${debugParticleSystem.tileSize.x},${debugParticleSystem.tileSize.y})`;
}
else if (type == 'color')
{
const c = debugParticleSystem[name];
value = `new Color(${c.r},${c.g},${c.b},${c.a})`;
}
else
value = debugParticleSystem[name];
code += value;
}
particleSystemCode.value = '...[' + code + ']';
}
updateCode();
}
debugParticleSystemDiv.style.display = debugParticleEditor ? '' : 'none'
}
const debugParticleSettings =
[
['emitSize'],
['emitTime'],
['emitRate'],
['emitConeAngle'],
['tileIndex'],
['tileSizeX', 'tileSize'],
['tileSizeY', 'tileSize'],
['colorStartA', 'color'],
['colorStartB', 'color'],
['colorStartAlpha', 'alpha'],
['colorEndA', 'color'],
['colorEndB', 'color'],
['colorEndAlpha', 'alpha'],
['particleTime'],
['sizeStart'],
['sizeEnd'],
['speed'],
['angleSpeed'],
['damping'],
['angleDamping'],
['gravityScale'],
['particleConeAngle'],
['fadeRate'],
['randomness'],
['collideTiles'],
['additive'],
['randomColorComponents'],
['renderOrder'],
];
================================================
FILE: engine/engineDraw.js
================================================
/*
LittleJS Drawing System
- Super fast tile sheet rendering
- Utility functions for webgl
- Adapted from Tiny-Canvas https://github.com/bitnenfer/tiny-canvas
*/
'use strict';
///////////////////////////////////////////////////////////////////////////////\
const screenToWorld = (screenPos)=>
screenPos.add(vec2(.5)).subtract(mainCanvasSize.scale(.5)).multiply(vec2(1/cameraScale,-1/cameraScale)).add(cameraPos);
const worldToScreen = (worldPos)=>
worldPos.subtract(cameraPos).multiply(vec2(cameraScale,-cameraScale)).add(mainCanvasSize.scale(.5)).subtract(vec2(.5));
// draw textured tile centered on pos
function drawTile(pos, size=vec2(1), tileIndex=-1, tileSize=defaultTileSize, color=new Color, angle=0, mirror,
additiveColor=new Color(0,0,0,0))
{
if (!size.x | !size.y)
return;
showWatermark && ++drawCount;
if (glEnable)
{
if (tileIndex < 0)
{
// if negative tile index, force untextured
glDraw(pos.x, pos.y, size.x, size.y, angle, 0, 0, 0, 0, 0, 0, color.rgbaInt());
}
else
{
// calculate uvs and render
const cols = tileImage.width / tileSize.x |0;
const uvSizeX = tileSize.x * tileImageSizeInverse.x;
const uvSizeY = tileSize.y * tileImageSizeInverse.y;
const uvX = (tileIndex%cols)*uvSizeX, uvY = (tileIndex/cols|0)*uvSizeY;
glDraw(pos.x, pos.y, size.x, size.y, angle, mirror,
uvX, uvY, uvX + uvSizeX, uvY + uvSizeY, color.rgbaInt(), additiveColor.rgbaInt());
}
}
else
{
// normal canvas 2D rendering method (slower)
drawCanvas2D(pos, size, angle, mirror, (context)=>
{
if (tileIndex < 0)
{
// if negative tile index, force untextured
context.fillStyle = color.rgba();
context.fillRect(-.5, -.5, 1, 1);
}
else
{
// calculate uvs and render
const cols = tileImage.width / tileSize.x |0;
const sX = (tileIndex%cols)*tileSize.x + tileBleedShrinkFix;
const sY = (tileIndex/cols|0)*tileSize.y + tileBleedShrinkFix;
const sWidth = tileSize.x - 2*tileBleedShrinkFix;
const sHeight = tileSize.y - 2*tileBleedShrinkFix;
context.globalAlpha = color.a; // only alpha is supported
context.drawImage(tileImage, sX, sY, sWidth, sHeight, -.5, -.5, 1, 1);
}
});
}
}
// draw a colored untextured rect centered on pos
function drawRect(pos, size, color, angle)
{
drawTile(pos, size, -1, defaultTileSize, color, angle);
}
// draw textured tile centered on pos in screen space
function drawTileScreenSpace(pos, size=vec2(1), tileIndex, tileSize, color, angle, mirror, additiveColor)
{
drawTile(screenToWorld(pos), size.scale(1/cameraScale), tileIndex, tileSize, color, angle, mirror, additiveColor);
}
// draw a colored untextured rect in screen space
function drawRectScreenSpace(pos, size, color, angle)
{
drawTileScreenSpace(pos, size, -1, defaultTileSize, color, angle);
}
// draw a colored line between two points
function drawLine(posA, posB, thickness=.1, color)
{
const halfDelta = vec2((posB.x - posA.x)*.5, (posB.y - posA.y)*.5);
const size = vec2(thickness, halfDelta.length()*2);
drawRect(posA.add(halfDelta), size, color, halfDelta.angle());
}
// draw directly to the 2d canvas in world space (bipass webgl)
function drawCanvas2D(pos, size, angle, mirror, drawFunction)
{
// create canvas transform from world space to screen space
pos = worldToScreen(pos);
size = size.scale(cameraScale);
mainContext.save();
mainContext.translate(pos.x+.5|0, pos.y-.5|0);
mainContext.rotate(angle);
mainContext.scale(mirror?-size.x:size.x, size.y);
drawFunction(mainContext);
mainContext.restore();
}
// draw text in world space without canvas scaling because that messes up fonts
function drawText(text, pos, size=1, color=new Color, lineWidth=0, lineColor=new Color(0,0,0), textAlign='center', font=defaultFont)
{
pos = worldToScreen(pos);
mainContext.font = size*cameraScale + 'px '+ font;
mainContext.textAlign = textAlign;
mainContext.textBaseline = 'middle';
if (lineWidth)
{
mainContext.lineWidth = lineWidth*cameraScale;
mainContext.strokeStyle = lineColor.rgba();
mainContext.strokeText(text, pos.x, pos.y);
}
mainContext.fillStyle = color.rgba();
mainContext.fillText(text, pos.x, pos.y);
}
// enable additive or regular blend mode
function setBlendMode(additive)
{
glEnable ? glSetBlendMode(additive) : mainContext.globalCompositeOperation = additive ? 'lighter' : 'source-over';
}
================================================
FILE: engine/engineInput.js
================================================
/*
LittleJS Input System
- Tracks key down, pressed, and released
- Also tracks mouse buttons, position, and wheel
- Supports multiple gamepads
*/
'use strict';
///////////////////////////////////////////////////////////////////////////////
// input
const enableGamepads = 1;
const enableTouchInput = 0;
const copyGamepadDirectionToStick = 1;
const copyWASDToDpad = 1;
// input for all devices including keyboard, mouse, and gamepad. (d=down, p=pressed, r=released)
const inputData = [[]];
const keyIsDown = (key, device=0)=> inputData[device][key] && inputData[device][key].d ? 1 : 0;
const keyWasPressed = (key, device=0)=> inputData[device][key] && inputData[device][key].p ? 1 : 0;
const keyWasReleased = (key, device=0)=> inputData[device][key] && inputData[device][key].r ? 1 : 0;
const clearInput = ()=> inputData[0].length = 0;
// mouse input is stored with keyboard
let hadInput = 0;
let mouseWheel = 0;
let mousePosScreen = vec2();
let mousePosWorld = vec2();
const mouseIsDown = keyIsDown;
const mouseWasPressed = keyWasPressed;
const mouseWasReleased = keyWasReleased;
// handle input events
onkeydown = e=>
{
if (debug && e.target != document.body) return;
e.repeat || (inputData[isUsingGamepad = 0][remapKeyCode(e.keyCode)] = {d:hadInput=1, p:1});
}
onkeyup = e=>
{
if (debug && e.target != document.body) return;
const c = remapKeyCode(e.keyCode); inputData[0][c] && (inputData[0][c].d = 0, inputData[0][c].r = 1);
}
onmousedown = e=> (inputData[0][e.button] = {d:hadInput=1, p:1}, onmousemove(e));
onmouseup = e=> inputData[0][e.button] && (inputData[0][e.button].d = 0, inputData[0][e.button].r = 1);
onmousemove = e=>
{
if (!mainCanvas)
return;
// convert mouse pos to canvas space
const rect = mainCanvas.getBoundingClientRect();
mousePosScreen.x = mainCanvasSize.x * percent(e.x, rect.right, rect.left);
mousePosScreen.y = mainCanvasSize.y * percent(e.y, rect.bottom, rect.top);
}
if(debug)
onwheel = e=> e.ctrlKey || (mouseWheel = sign(e.deltaY));
oncontextmenu = e=> !1; // prevent right click menu
const remapKeyCode = c=> copyWASDToDpad ? c==87?38 : c==83?40 : c==65?37 : c==68?39 : c : c;
////////////////////////////////////////////////////////////////////
// gamepad
let isUsingGamepad = 0;
let gamepadCount = 0;
const gamepadStick = (stick, gamepad=0)=> gamepad < gamepadCount ? inputData[gamepad+1].stickData[stick] : vec2();
const gamepadIsDown = (button, gamepad=0)=> gamepad < gamepadCount ? keyIsDown (button, gamepad+1) : 0;
const gamepadWasPressed = (button, gamepad=0)=> gamepad < gamepadCount ? keyWasPressed (button, gamepad+1) : 0;
const gamepadWasReleased = (button, gamepad=0)=> gamepad < gamepadCount ? keyWasReleased(button, gamepad+1) : 0;
function updateGamepads()
{
if (!navigator.getGamepads || !enableGamepads)
return;
if (!document.hasFocus() && !debug)
return;
const gamepads = navigator.getGamepads();
gamepadCount = 0;
for(let i = 0; i < navigator.getGamepads().length; ++i)
{
// get or create gamepad data
const gamepad = gamepads[i];
let data = inputData[i+1];
if (!data)
{
data = inputData[i+1] = [];
data.stickData = [vec2(), vec2()];
}
if (gamepad && gamepad.axes.length >= 2)
{
gamepadCount = i+1;
// read analog sticks and clamp dead zone
const deadZone = .3, deadZoneMax = .8;
const applyDeadZone = (v)=>
v > deadZone ? percent( v, deadZoneMax, deadZone) :
v < -deadZone ? -percent(-v, deadZoneMax, deadZone) : 0;
data.stickData[0] = vec2(applyDeadZone(gamepad.axes[0]), applyDeadZone(-gamepad.axes[1]));
if (copyGamepadDirectionToStick)
{
// copy dpad to left analog stick when pressed
if (gamepadIsDown(12,i)|gamepadIsDown(13,i)|gamepadIsDown(14,i)|gamepadIsDown(15,i))
data.stickData[0] = vec2(gamepadIsDown(15,i) - gamepadIsDown(14,i), gamepadIsDown(12,i) - gamepadIsDown(13,i));
}
// clamp stick input to unit vector
data.stickData[0] = data.stickData[0].clampLength();
// read buttons
gamepad.buttons.map((button, j)=>
{
inputData[i+1][j] = button.pressed ? {d:1, p:!gamepadIsDown(j,i)} :
inputData[i+1][j] = {r:gamepadIsDown(j,i)}
isUsingGamepad |= button.pressed && !i;
});
}
}
}
///////////////////////////////////////////////////////////////////////////////
// touch screen input
if (enableTouchInput && window.ontouchstart !== undefined)
{
// handle all touch events the same way
ontouchstart = ontouchmove = ontouchend = e=>
{
e.button = 0; // all touches are left click
hadInput || zzfx(hadInput = 1) ; // fix mobile audio, force it to play a sound the first time
// check if touching and pass to mouse events
const touching = e.touches.length;
if (touching)
{
// set event pos and pass it along
e.x = e.touches[0].clientX;
e.y = e.touches[0].clientY;
wasTouching ? onmousemove(e) : onmousedown(e);
}
else if (wasTouching)
wasTouching && onmouseup(e);
// set was touching
wasTouching = touching;
}
let wasTouching;
}
================================================
FILE: engine/engineObject.js
================================================
/*
LittleJS Object Base Class
- Base object class used by the engine
- Automatically adds self to object list
- Will be updated and rendered each frame
- Renders as a sprite from a tilesheet by default
- Can have color and addtive color applied
- 2d Physics and collision system
- Sorted by renderOrder
- Objects can have children attached
- Parents are updated before children, and set child transform
- Call destroy() to get rid of objects
*/
'use strict';
///////////////////////////////////////////////////////////////////////////////
// object defaults
const defaultObjectSize = vec2(.999);
const defaultObjectMass = 1;
const defaultObjectDamping = .99;
const defaultObjectAngleDamping = .99;
const defaultObjectElasticity = 0;
const defaultObjectFriction = .8;
const maxObjectSpeed = 1;
class EngineObject
{
constructor(pos, size=defaultObjectSize, tileIndex=-1, tileSize=defaultTileSize, angle=0, color)
{
// set passed in params
ASSERT(pos);
this.pos = pos.copy();
this.size = size;
this.tileIndex = tileIndex;
this.tileSize = tileSize;
this.angle = angle;
this.color = color;
// set physics defaults
this.mass = defaultObjectMass;
this.damping = defaultObjectDamping;
this.angleDamping = defaultObjectAngleDamping;
this.elasticity = defaultObjectElasticity;
this.friction = defaultObjectFriction;
// init other object stuff
this.spawnTime = time;
this.velocity = vec2(this.collideSolidObjects = this.renderOrder = this.angleVelocity = 0);
this.collideTiles = this.gravityScale = 1;
this.children = [];
// add to list of objects
engineObjects.push(this);
}
update()
{
if (this.parent)
{
// copy parent pos/angle
this.pos = this.localPos.multiply(vec2(this.getMirrorSign(),1)).rotate(-this.parent.angle).add(this.parent.pos);
this.angle = this.getMirrorSign()*this.localAngle + this.parent.angle;
return;
}
// limit max speed to prevent missing collisions
this.velocity.x = clamp(this.velocity.x, maxObjectSpeed, -maxObjectSpeed);
this.velocity.y = clamp(this.velocity.y, maxObjectSpeed, -maxObjectSpeed);
// apply physics
const oldPos = this.pos.copy();
this.pos.x += this.velocity.x = this.damping * this.velocity.x;
this.pos.y += this.velocity.y = this.damping * this.velocity.y + gravity * this.gravityScale;
this.angle += this.angleVelocity *= this.angleDamping;
// physics sanity checks
ASSERT(this.angleDamping >= 0 && this.angleDamping <= 1);
ASSERT(this.damping >= 0 && this.damping <= 1);
if (!this.mass) // do not update collision for fixed objects
return;
const wasMovingDown = this.velocity.y < 0;
if (this.groundObject)
{
// apply friction in local space of ground object
const groundSpeed = this.groundObject.velocity ? this.groundObject.velocity.x : 0;
this.velocity.x = groundSpeed + (this.velocity.x - groundSpeed) * this.friction;
this.groundObject = 0;
//debugPhysics && debugPoint(this.pos.subtract(vec2(0,this.size.y/2)), '#0f0');
}
if (this.collideSolidObjects)
{
// check collisions against solid objects
const epsilon = 1e-3; // necessary to push slightly outside of the collision
for(const o of engineCollideObjects)
{
// non solid objects don't collide with eachother
if (!this.isSolid & !o.isSolid || o.destroyed || o.parent)
continue;
// check collision
if (!isOverlapping(this.pos, this.size, o.pos, o.size) || o == this)
continue;
// pass collision to objects
if (!this.collideWithObject(o) | !o.collideWithObject(this))
continue;
if (isOverlapping(oldPos, this.size, o.pos, o.size))
{
// if already was touching, try to push away
const deltaPos = oldPos.subtract(o.pos);
const length = deltaPos.length();
const pushAwayAccel = .001; // push away if alread overlapping
const velocity = length < .01 ? randVector(pushAwayAccel) : deltaPos.scale(pushAwayAccel/length);
this.velocity = this.velocity.add(velocity);
if (o.mass) // push away if not fixed
o.velocity = o.velocity.subtract(velocity);
debugPhysics && debugAABB(this.pos, o.pos, this.size, o.size, '#f00');
continue;
}
// check for collision
const sx = this.size.x + o.size.x;
const sy = this.size.y + o.size.y;
const smallStepUp = (oldPos.y - o.pos.y)*2 > sy + gravity; // prefer to push up if small delta
const isBlockedX = abs(oldPos.y - o.pos.y)*2 < sy;
const isBlockedY = abs(oldPos.x - o.pos.x)*2 < sx;
if (smallStepUp || isBlockedY || !isBlockedX) // resolve y collision
{
// push outside object collision
this.pos.y = o.pos.y + (sy*.5 + epsilon) * sign(oldPos.y - o.pos.y);
if (o.groundObject && wasMovingDown || !o.mass)
{
// set ground object if landed on something
if (wasMovingDown)
this.groundObject = o;
// bounce if other object is fixed or grounded
this.velocity.y *= -this.elasticity;
}
else if (o.mass)
{
// set center of mass velocity
this.velocity.y = o.velocity.y =
(this.mass * this.velocity.y + o.mass * o.velocity.y) / (this.mass + o.mass);
}
debugPhysics && smallStepUp && (abs(oldPos.x - o.pos.x)*2 > sx) && console.log('stepUp', oldPos.y - o.pos.y);
}
if (!smallStepUp && (isBlockedX || !isBlockedY)) // resolve x collision
{
// push outside collision
this.pos.x = o.pos.x + (sx*.5 + epsilon) * sign(oldPos.x - o.pos.x);
if (o.mass)
{
// set center of mass velocity
this.velocity.x = o.velocity.x =
(this.mass * this.velocity.x + o.mass * o.velocity.x) / (this.mass + o.mass);
}
else // bounce if other object is fixed
this.velocity.x *= -this.elasticity;
}
debugPhysics && debugAABB(this.pos, o.pos, this.size, o.size, '#f0f');
}
}
if (this.collideTiles)
{
// check collision against tiles
if (tileCollisionTest(this.pos, this.size, this))
{
//debugPhysics && debugRect(this.pos, this.size, '#ff0');
// if already was stuck in collision, don't do anything
// this should not happen unless something starts in collision
if (!tileCollisionTest(oldPos, this.size, this))
{
// test which side we bounced off (or both if a corner)
const isBlockedY = tileCollisionTest(new Vector2(oldPos.x, this.pos.y), this.size, this);
const isBlockedX = tileCollisionTest(new Vector2(this.pos.x, oldPos.y), this.size, this);
if (isBlockedY || !isBlockedX)
{
// set if landed on ground
this.groundObject = wasMovingDown;
// push out of collision and bounce
this.pos.y = oldPos.y;
this.velocity.y *= -this.elasticity;
}
if (isBlockedX || !isBlockedY)
{
// push out of collision and bounce
this.pos.x = oldPos.x;
this.velocity.x *= -this.elasticity;
}
}
}
}
}
render()
{
// default object render
drawTile(this.pos, this.size, this.tileIndex, this.tileSize, this.color, this.angle, this.mirror, this.additiveColor);
}
destroy()
{
if (this.destroyed)
return;
// disconnect from parent and destroy chidren
this.destroyed = 1;
this.parent && this.parent.removeChild(this);
for(const child of this.children)
child.destroy(child.parent = 0);
}
collideWithTile(data, pos) { return data > 0; }
collideWithTileRaycast(data, pos) { return data > 0; }
collideWithObject(o) { return 1; }
getAliveTime() { return time - this.spawnTime; }
applyAcceleration(a) { ASSERT(!this.isFixed()); this.velocity = this.velocity.add(a); }
applyForce(force) { this.applyAcceleration(force.scale(1/this.mass)); }
isFixed() { return !this.mass; }
getMirrorSign(s=1) { return this.mirror ? -s : s; }
addChild(child, localPos=vec2(), localAngle=0)
{
ASSERT(!child.parent && !this.children.includes(child));
this.children.push(child);
child.parent = this;
child.localPos = localPos.copy();
child.localAngle = localAngle;
}
removeChild(child)
{
ASSERT(child.parent == this && this.children.includes(child));
this.children.splice(this.children.indexOf(child), 1);
child.parent = 0;
}
setCollision(collideSolidObjects=1, isSolid, collideTiles=1)
{
ASSERT(collideSolidObjects || !isSolid); // solid objects must be set to collide
// track collidable objects in separate list
if (collideSolidObjects && !this.collideSolidObjects)
{
ASSERT(!engineCollideObjects.includes(this));
engineCollideObjects.push(this);
}
else if (!collideSolidObjects && this.collideSolidObjects)
{
ASSERT(engineCollideObjects.includes(this))
engineCollideObjects.splice(engineCollideObjects.indexOf(this), 1);
}
this.collideSolidObjects = collideSolidObjects;
this.isSolid = isSolid;
this.collideTiles = collideTiles;
}
}
================================================
FILE: engine/engineParticle.js
================================================
/*
LittleJS Particle System
- Spawns particles with randomness from parameters
- Updates particle physics
- Fast particle rendering
*/
'use strict';
class ParticleEmitter extends EngineObject
{
constructor
(
pos, // world space position of emitter
emitSize = 0, // size of emitter (float for circle diameter, vec2 for rect)
emitTime = 0, // how long to stay alive (0 is forever)
emitRate = 100, // how many particles per second to spawn
emitConeAngle = PI, // local angle to apply velocity to particles from emitter
tileIndex = -1, // index into tile sheet, if <0 no texture is applied
tileSize = defaultTileSize, // tile size for particles
colorStartA = new Color, // color at start of life
colorStartB = new Color, // randomized between start colors
colorEndA = new Color(1,1,1,0), // color at end of life
colorEndB = new Color(1,1,1,0), // randomized between end colors
particleTime = .5, // how long particles live
sizeStart = .1, // how big are particles at start
sizeEnd = 1, // how big are particles at end
speed = .1, // how fast are particles when spawned
angleSpeed = .05, // how fast are particles rotating
damping = 1, // how much to dampen particle speed
angleDamping = 1, // how much to dampen particle angular speed
gravityScale = 0, // how much does gravity effect particles
particleConeAngle = PI, // cone for start particle angle
fadeRate = .1, // how quick to fade in particles at start/end in percent of life
randomness = .2, // apply extra randomness percent
collideTiles, // do particles collide against tiles
additive, // should particles use addtive blend
randomColorLinear = 1, // should color be randomized linearly or across each component
renderOrder = additive ? 1e9 : 0// render order for particles (additive is above other stuff by default)
)
{
super(pos, new Vector2, tileIndex, tileSize);
// emitter settings
this.emitSize = emitSize
this.emitTime = emitTime;
this.emitRate = emitRate;
this.emitConeAngle = emitConeAngle;
// color settings
this.colorStartA = colorStartA;
this.colorStartB = colorStartB;
this.colorEndA = colorEndA;
this.colorEndB = colorEndB;
this.randomColorLinear = randomColorLinear;
// particle settings
this.particleTime = particleTime;
this.sizeStart = sizeStart;
this.sizeEnd = sizeEnd;
this.speed = speed;
this.angleSpeed = angleSpeed;
this.damping = damping;
this.angleDamping = angleDamping;
this.gravityScale = gravityScale;
this.particleConeAngle = particleConeAngle;
this.fadeRate = fadeRate;
this.randomness = randomness;
this.collideTiles = collideTiles;
this.additive = additive;
this.renderOrder = renderOrder;
this.trailScale =
this.emitTimeBuffer = 0;
}
update()
{
// only do default update to apply parent transforms
this.parent && super.update();
// update emitter
if (!this.emitTime || this.getAliveTime() <= this.emitTime)
{
// emit particles
if (this.emitRate)
{
const rate = 1/this.emitRate;
for(this.emitTimeBuffer += timeDelta; this.emitTimeBuffer > 0; this.emitTimeBuffer -= rate)
this.emitParticle();
}
}
else
this.destroy();
debugParticles && debugRect(this.pos, vec2(this.emitSize), '#0f0', 0, this.angle);
}
emitParticle()
{
// spawn a particle
const pos = this.emitSize.x != undefined ? // check if vec2 was used for size
(new Vector2(rand(-.5,.5), rand(-.5,.5))).multiply(this.emitSize).rotate(this.angle) // box emitter
: randInCircle(this.emitSize * .5); // circle emitter
const particle = new Particle(this.pos.add(pos), this.tileIndex, this.tileSize,
this.angle + rand(this.particleConeAngle, -this.particleConeAngle));
// randomness scales each paremeter by a percentage
const randomness = this.randomness;
const randomizeScale = (v)=> v + v*rand(randomness, -randomness);
// randomize particle settings
const particleTime = randomizeScale(this.particleTime);
const sizeStart = randomizeScale(this.sizeStart);
const sizeEnd = randomizeScale(this.sizeEnd);
const speed = randomizeScale(this.speed);
const angleSpeed = randomizeScale(this.angleSpeed) * randSign();
gitextract_bxe1a8ta/ ├── LICENSE ├── README.md ├── app.js ├── appCharacters.js ├── appEffects.js ├── appLevel.js ├── appObjects.js ├── engine/ │ ├── build/ │ │ ├── build.bat │ │ ├── build.html │ │ ├── engineBuild.js │ │ ├── index.html │ │ └── setupBuild.bat │ ├── engine.js │ ├── engineAudio.js │ ├── engineDebug.js │ ├── engineDraw.js │ ├── engineInput.js │ ├── engineObject.js │ ├── engineParticle.js │ ├── engineTileLayer.js │ ├── engineUtil.js │ └── engineWebGL.js └── index.html
SYMBOL INDEX (204 symbols across 14 files)
FILE: appCharacters.js
class Character (line 13) | class Character extends GameObject
method constructor (line 15) | constructor(pos, sizeScale = 1)
method update (line 41) | update()
method render (line 211) | render()
method damage (line 241) | damage(damage, damagingObject)
method kill (line 268) | kill(damagingObject)
method collideWithTile (line 296) | collideWithTile(data, pos)
method collideWithObject (line 330) | collideWithObject(o)
function alertEnemies (line 366) | function alertEnemies(pos, playerPos)
class Enemy (line 373) | class Enemy extends Character
method constructor (line 375) | constructor(pos)
method update (line 439) | update()
method alert (line 630) | alert(playerPos, resetSawPlayer)
method damage (line 647) | damage(damage, damagingObject)
method kill (line 658) | kill(damagingObject)
class Player (line 670) | class Player extends Character
method constructor (line 672) | constructor(pos, playerIndex=0)
method update (line 703) | update()
FILE: appEffects.js
function makeBlood (line 38) | function makeBlood(pos, amount=50)
function makeFire (line 53) | function makeFire(pos = vec2())
function makeDebris (line 65) | function makeDebris(pos, color = new Color, amount = 100)
function makeWater (line 82) | function makeWater(pos, amount=400)
function explosion (line 131) | function explosion(pos, radius=2)
class TileCascadeDestroy (line 207) | class TileCascadeDestroy extends EngineObject
method constructor (line 209) | constructor(pos, cascadeChance=1, glass=0)
method update (line 216) | update()
function decorateBackgroundTile (line 226) | function decorateBackgroundTile(pos)
function decorateTile (line 255) | function decorateTile(pos)
function destroyTile (line 299) | function destroyTile(pos, makeSound = 1, cleanNeighbors = 1, maxCascadeC...
function drawStars (line 347) | function drawStars()
function updateSky (line 382) | function updateSky()
function generateParallaxLayers (line 412) | function generateParallaxLayers()
function updateParallaxLayers (line 437) | function updateParallaxLayers()
FILE: appLevel.js
function buildTerrain (line 48) | function buildTerrain(size)
function spawnProps (line 116) | function spawnProps(pos)
function buildBase (line 139) | function buildBase()
function generateLevel (line 289) | function generateLevel()
function makeTileLayers (line 343) | function makeTileLayers(level_)
function applyArtToLevel (line 433) | function applyArtToLevel()
function nextLevel (line 483) | function nextLevel()
FILE: appObjects.js
class GameObject (line 9) | class GameObject extends EngineObject
method constructor (line 11) | constructor(pos, size, tileIndex, tileSize, angle)
method inUpdateWindow (line 26) | inUpdateWindow() { return levelWarmup || isOverlapping(this.pos, this....
method update (line 28) | update()
method render (line 78) | render()
method burnColorPercent (line 83) | burnColorPercent() { return lerp(this.burnTimer.getPercent(), .2, 1); }
method burn (line 85) | burn(instant)
method extinguish (line 110) | extinguish()
method heal (line 124) | heal(health)
method damage (line 134) | damage(damage, damagingObject)
method isDead (line 154) | isDead() { return !this.health; }
method kill (line 155) | kill(damagingObject) { this.destroy(); }
method collideWithObject (line 157) | collideWithObject(o)
class Prop (line 185) | class Prop extends GameObject
method constructor (line 187) | constructor(pos, typeOverride)
method update (line 275) | update()
method damage (line 285) | damage(damage, damagingObject)
method kill (line 291) | kill()
class Checkpoint (line 311) | class Checkpoint extends GameObject
method constructor (line 313) | constructor(pos)
method update (line 323) | update()
method setActive (line 333) | setActive()
method render (line 343) | render()
class Grenade (line 356) | class Grenade extends GameObject
method constructor (line 358) | constructor(pos)
method update (line 371) | update()
method render (line 391) | render()
class Weapon (line 406) | class Weapon extends EngineObject
method constructor (line 408) | constructor(pos, parent)
method update (line 434) | update()
class Bullet (line 476) | class Bullet extends EngineObject
method constructor (line 478) | constructor(pos, attacker)
method update (line 493) | update()
method collideWithObject (line 524) | collideWithObject(o)
method collideWithTile (line 542) | collideWithTile(data, pos)
method kill (line 554) | kill()
method render (line 575) | render()
FILE: engine/engine.js
constant FPS (line 27) | const FPS = 60, timeDelta = 1/FPS;
function engineInit (line 52) | function engineInit(appInit, appUpdate, appUpdatePost, appRender, appRen...
function engineUpdateObjects (line 187) | function engineUpdateObjects()
function forEachObject (line 206) | function forEachObject(pos, size=0, callbackFunction=(o)=>1, collideObje...
FILE: engine/engineAudio.js
function playSound (line 20) | function playSound(zzfxSound, pos, range=defaultSoundRange, volumeScale=1)
function playMusic (line 39) | function playMusic(zzfxmMusic, loop=1)
function speak (line 50) | function speak(text, language='', volume=1, rate=1, pitch=1)
function zzfx (line 73) | function zzfx(
function zzfxM (line 176) | function zzfxM(instruments, patterns, sequence, BPM = 125)
FILE: engine/engineDebug.js
constant ASSERT (line 28) | const ASSERT = enableAsserts ? (...assert)=> console.assert(...assert) :...
FILE: engine/engineDraw.js
function drawTile (line 19) | function drawTile(pos, size=vec2(1), tileIndex=-1, tileSize=defaultTileS...
function drawRect (line 71) | function drawRect(pos, size, color, angle)
function drawTileScreenSpace (line 77) | function drawTileScreenSpace(pos, size=vec2(1), tileIndex, tileSize, col...
function drawRectScreenSpace (line 83) | function drawRectScreenSpace(pos, size, color, angle)
function drawLine (line 89) | function drawLine(posA, posB, thickness=.1, color)
function drawCanvas2D (line 97) | function drawCanvas2D(pos, size, angle, mirror, drawFunction)
function drawText (line 111) | function drawText(text, pos, size=1, color=new Color, lineWidth=0, lineC...
function setBlendMode (line 128) | function setBlendMode(additive)
FILE: engine/engineInput.js
function updateGamepads (line 72) | function updateGamepads()
FILE: engine/engineObject.js
class EngineObject (line 28) | class EngineObject
method constructor (line 30) | constructor(pos, size=defaultObjectSize, tileIndex=-1, tileSize=defaul...
method update (line 58) | update()
method render (line 207) | render()
method destroy (line 213) | destroy()
method collideWithTile (line 224) | collideWithTile(data, pos) { return data > 0; }
method collideWithTileRaycast (line 225) | collideWithTileRaycast(data, pos) { return data > 0; }
method collideWithObject (line 226) | collideWithObject(o) { return 1; }
method getAliveTime (line 227) | getAliveTime() { return time - this.spawnTime; }
method applyAcceleration (line 228) | applyAcceleration(a) { ASSERT(!this.isFixed()); this.velo...
method applyForce (line 229) | applyForce(force) { this.applyAcceleration(force.scale(1...
method isFixed (line 230) | isFixed() { return !this.mass; }
method getMirrorSign (line 231) | getMirrorSign(s=1) { return this.mirror ? -s : s; }
method addChild (line 233) | addChild(child, localPos=vec2(), localAngle=0)
method removeChild (line 241) | removeChild(child)
method setCollision (line 248) | setCollision(collideSolidObjects=1, isSolid, collideTiles=1)
FILE: engine/engineParticle.js
class ParticleEmitter (line 10) | class ParticleEmitter extends EngineObject
method constructor (line 12) | constructor
method update (line 76) | update()
method emitParticle (line 98) | emitParticle()
method render (line 149) | render() {}
class Particle (line 155) | class Particle extends EngineObject
method constructor (line 157) | constructor(pos, tileIndex, tileSize, angle) { super(pos, new Vector2,...
method render (line 159) | render()
FILE: engine/engineTileLayer.js
function initTileCollision (line 22) | function initTileCollision(size)
function tileCollisionTest (line 36) | function tileCollisionTest(pos, size=vec2(), object)
function tileCollisionRaycast (line 54) | function tileCollisionRaycast(posStart, posEnd, object)
class TileLayerData (line 86) | class TileLayerData
method constructor (line 88) | constructor(tile=-1, direction=0, mirror=0, color=new Color)
method clear (line 95) | clear() { this.tile = this.direction = this.mirror = 0; color = new Co...
class TileLayer (line 98) | class TileLayer extends EngineObject
method constructor (line 100) | constructor(pos, size, scale=vec2(1), layer=0)
method destroy (line 120) | destroy()
method setData (line 127) | setData(layerPos, data, redraw)
method getData (line 136) | getData(layerPos)
method update (line 139) | update() {}
method render (line 140) | render()
method redraw (line 156) | redraw()
method redrawStart (line 164) | redrawStart(clear = 1)
method redrawEnd (line 189) | redrawEnd()
method drawTileData (line 199) | drawTileData(layerPos)
method drawAllTileData (line 211) | drawAllTileData()
method drawCanvas2D (line 219) | drawCanvas2D(pos, size, angle, mirror, drawFunction)
method drawTile (line 232) | drawTile(pos, size=vec2(1), tileIndex=0, tileSize=defaultTileSize, col...
method drawRect (line 254) | drawRect(pos, size, color, angle) { this.drawTile(pos, size, -1, 0, co...
FILE: engine/engineUtil.js
class Vector2 (line 43) | class Vector2
method constructor (line 45) | constructor(x=0, y=0) { this.x = x; this.y = y; }
method copy (line 48) | copy() { return new Vector2(this.x, this.y); }
method scale (line 49) | scale(s) { ASSERT(s.x==undefined); return new Vector2(thi...
method add (line 50) | add(v) { ASSERT(v.x!=undefined); return new Vector2(thi...
method subtract (line 51) | subtract(v) { ASSERT(v.x!=undefined); return new Vector2(thi...
method multiply (line 52) | multiply(v) { ASSERT(v.x!=undefined); return new Vector2(thi...
method divide (line 53) | divide(v) { ASSERT(v.x!=undefined); return new Vector2(thi...
method length (line 56) | length() { return this.lengthSquared()**.5; }
method lengthSquared (line 57) | lengthSquared() { return this.x**2 + this.y**2; }
method distance (line 58) | distance(p) { return this.distanceSquared(p)**.5; }
method distanceSquared (line 59) | distanceSquared(p) { return (this.x - p.x)**2 + (this.y - p.y)**2; }
method normalize (line 60) | normalize(length=1) { const l = this.length(); return l ? this.scale...
method clampLength (line 61) | clampLength(length=1) { const l = this.length(); return l > length ? t...
method dot (line 62) | dot(v) { ASSERT(v.x!=undefined); return this.x*v.x + th...
method cross (line 63) | cross(v) { ASSERT(v.x!=undefined); return this.x*v.y - th...
method angle (line 64) | angle() { return Math.atan2(this.x, this.y); }
method setAngle (line 65) | setAngle(a, length=1) { this.x = length*Math.sin(a); this.y = length*M...
method rotate (line 66) | rotate(a) { const c = Math.cos(a), s = Math.sin(a); return...
method direction (line 67) | direction() { return abs(this.x) > abs(this.y) ? this.x < 0 ...
method flip (line 68) | flip() { return new Vector2(this.y, this.x); }
method invert (line 69) | invert() { return new Vector2(this.y, -this.x); }
method round (line 70) | round() { return new Vector2(Math.round(this.x), Math.ro...
method lerp (line 71) | lerp(v, p) { ASSERT(v.x!=undefined); return this.add(v.subt...
method int (line 72) | int() { return new Vector2(this.x|0, this.y|0); }
method area (line 73) | area() { return this.x * this.y; }
method arrayCheck (line 74) | arrayCheck(arraySize) { return this.x >= 0 && this.y >= 0 && this.x < ...
class Color (line 78) | class Color
method constructor (line 80) | constructor(r=1, g=1, b=1, a=1) { this.r=r; this.g=g; this.b=b; this.a...
method copy (line 82) | copy(c) { return new Color(this.r, this.g, this.b, this.a); }
method add (line 83) | add(c) { return new Color(this.r+c.r, this.g+c.g, this.b+c.b, thi...
method subtract (line 84) | subtract(c) { return new Color(this.r-c.r, this.g-c.g, this.b-c.b, thi...
method multiply (line 85) | multiply(c) { return new Color(this.r*c.r, this.g*c.g, this.b*c.b, thi...
method scale (line 86) | scale(s,a=s){ return new Color(this.r*s, this.g*s, this.b*s, this.a*a); }
method clamp (line 87) | clamp() { return new Color(clamp(this.r), clamp(this.g), clamp(thi...
method lerp (line 88) | lerp(c, p) { return this.add(c.subtract(this).scale(clamp(p))); }
method mutate (line 89) | mutate(amount=.05, alphaAmount=0)
method rgba (line 99) | rgba()
method rgbaInt (line 104) | rgbaInt()
method setHSLA (line 109) | setHSLA(h=0, s=0, l=1, a=1)
class Timer (line 126) | class Timer
method constructor (line 128) | constructor(timeLeft) { this.time = timeLeft == undefined ? undefine...
method set (line 130) | set(timeLeft=0) { this.time = time + timeLeft; this.setTime = timeLeft; }
method unset (line 131) | unset() { this.time = undefined; }
method isSet (line 132) | isSet() { return this.time != undefined; }
method active (line 133) | active() { return time <= this.time; }
method elapsed (line 134) | elapsed() { return time > this.time; }
method get (line 135) | get() { return this.isSet()? time - this.time : 0; }
method getPercent (line 136) | getPercent() { return this.isSet()? percent(this.time - time, 0, th...
FILE: engine/engineWebGL.js
function glInit (line 17) | function glInit()
function glSetBlendMode (line 85) | function glSetBlendMode(additive)
function glCompileShader (line 102) | function glCompileShader(source, type)
function glCreateProgram (line 117) | function glCreateProgram(vsSource, fsSource)
function glCreateBuffer (line 133) | function glCreateBuffer(bufferType, size, usage)
function glCreateTexture (line 144) | function glCreateTexture(image)
function glPreRender (line 155) | function glPreRender(width, height)
function glFlush (line 181) | function glFlush()
function glCopyToContext (line 193) | function glCopyToContext(context, forceDraw)
function glDraw (line 209) | function glDraw(x, y, sizeX, sizeY, angle, mirror, uv0X, uv0Y, uv1X, uv1...
constant VERTICES_PER_QUAD (line 300) | const
constant INDICIES_PER_VERT (line 300) | const
constant MAX_BATCH (line 300) | const
constant VERTEX_STRIDE (line 300) | const
Condensed preview — 23 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (241K chars).
[
{
"path": "LICENSE",
"chars": 35149,
"preview": " GNU GENERAL PUBLIC LICENSE\n Version 3, 29 June 2007\n\n Copyright (C) 2007 Free "
},
{
"path": "README.md",
"chars": 4949,
"preview": "\n\nThe empire is spreading like a plague across the galaxy"
},
{
"path": "app.js",
"chars": 7301,
"preview": "/*\r\n Javascript Space Game\r\n By Frank Force 2021\r\n\r\n*/\r\n\r\n'use strict';\r\n\r\nconst clampCamera = !debug;\r\nconst lowG"
},
{
"path": "appCharacters.js",
"chars": 29353,
"preview": "/*\r\n Javascript Space Game\r\n By Frank Force 2021\r\n\r\n*/\r\n\r\n'use strict';\r\n\r\nconst aiEnable = 1;\r\nconst debugAI = 0;"
},
{
"path": "appEffects.js",
"chars": 17550,
"preview": "/*\r\n Javascript Space Game\r\n By Frank Force 2021\r\n\r\n*/\r\n\r\n'use strict';\r\n\r\nconst precipitationEnable = 1;\r\nconst d"
},
{
"path": "appLevel.js",
"chars": 18314,
"preview": "/*\r\n Javascript Space Game\r\n By Frank Force 2021\r\n\r\n*/\r\n\r\n'use strict';\r\n\r\nconst tileType_ladder = -1;\r\nconst til"
},
{
"path": "appObjects.js",
"chars": 18216,
"preview": "/*\r\n Javascript Space Game\r\n By Frank Force 2021\r\n\r\n*/\r\n\r\n'use strict';\r\n\r\nclass GameObject extends EngineObject \r"
},
{
"path": "engine/build/build.bat",
"chars": 2679,
"preview": "rem SIMPLE BUILD SCRIPT FOR JS13k by FRANK FORCE\nrem minfies and combines index.html and index.js and zips the result\n\ns"
},
{
"path": "engine/build/build.html",
"chars": 6,
"preview": "<body>"
},
{
"path": "engine/build/engineBuild.js",
"chars": 539,
"preview": "/*\n LittleJS - Build include file\n By Frank Force 2021\n\n This file is automatically included first by the build"
},
{
"path": "engine/build/index.html",
"chars": 6,
"preview": "<body>"
},
{
"path": "engine/build/setupBuild.bat",
"chars": 218,
"preview": "rem install these command line tools if necessary\nnpm install -g google-closure-compiler\nnpm install -g terser\nnpm insta"
},
{
"path": "engine/engine.js",
"chars": 9695,
"preview": "/*\r\n LittleJS - The Little JavaScript Game Engine That Can - By Frank Force 2021\r\n\r\n Engine Features\r\n - Engine"
},
{
"path": "engine/engineAudio.js",
"chars": 10898,
"preview": "/*\r\n LittleJS Audio System\r\n - Speech Synthesis\r\n - ZzFX Sound Effects\r\n - ZzFXM Music\r\n - Can attenuate "
},
{
"path": "engine/engineDebug.js",
"chars": 15386,
"preview": "/*\n LittleJS Debug System\n \n Debug Features\n - debug console\n - debug rendering\n - debug controls\n "
},
{
"path": "engine/engineDraw.js",
"chars": 4972,
"preview": "/*\r\n LittleJS Drawing System\r\n\r\n - Super fast tile sheet rendering\r\n - Utility functions for webgl\r\n - Adapt"
},
{
"path": "engine/engineInput.js",
"chars": 5698,
"preview": "/*\r\n LittleJS Input System\r\n - Tracks key down, pressed, and released\r\n - Also tracks mouse buttons, position, "
},
{
"path": "engine/engineObject.js",
"chars": 11283,
"preview": "/*\r\n LittleJS Object Base Class\r\n - Base object class used by the engine\r\n - Automatically adds self to object "
},
{
"path": "engine/engineParticle.js",
"chars": 9021,
"preview": "/*\r\n LittleJS Particle System\r\n - Spawns particles with randomness from parameters\r\n - Updates particle physics"
},
{
"path": "engine/engineTileLayer.js",
"chars": 8945,
"preview": "/*\r\n LittleJS Tile Layer System\r\n - Caches arrays of tiles to offscreen canvas for fast rendering\r\n - Unlimted "
},
{
"path": "engine/engineUtil.js",
"chars": 7210,
"preview": "\r\n/*\r\n LittleJS Utility Classes and Functions\r\n - Vector2 - fast, simple, easy vector class\r\n - Color - holds a"
},
{
"path": "engine/engineWebGL.js",
"chars": 11256,
"preview": "/*\r\n LittleJS WebGL Interface\r\n - All webgl used by the engine is wrapped up here\r\n - Can be disabled with glEn"
},
{
"path": "index.html",
"chars": 1056,
"preview": "<head>\r\n<title>Space Huggers</title>\r\n<link rel=icon type=image/x-icon href='favicon.ico'/>\r\n<meta name=\"title\" content="
}
]
About this extraction
This page contains the full source code of the KilledByAPixel/SpaceHuggers GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 23 files (224.3 KB), approximately 55.9k tokens, and a symbol index with 204 extracted functions, classes, methods, constants, and types. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
Extracted by GitExtract — free GitHub repo to text converter for AI. Built by Nikandr Surkov.