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Copy pathscript.js
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1660 lines (1660 loc) · 59.7 KB
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function hideClass(name) {
for (var elem of $(name)) elem.style.display = "none";
}
var DEFAULT_WIDTH = 600, FPS = 60;
var IS_HIDPI = false, IS_IOS = false, IS_MOBILE = false, IS_TOUCH_ENABLED = false;
function Runner(outerContainerId) {
Runner.instance_ = this;
var outerContainerEl = document.querySelector(outerContainerId);
this.outerContainerEl = outerContainerEl
this.containerEl = null;
this.detailsButton = outerContainerEl.querySelector("#details-button");
this.config = Runner.config;
this.dimensions = Runner.defaultDimensions;
this.canvas = null;
this.canvasCtx = null;
this.tRex = null;
this.distanceMeter = null;
this.distanceRan = 0;
this.highestScore = 0;
this.time = 0;
this.runningTime = 0;
this.msPerFrame = 1000 / FPS;
this.currentSpeed = Runner.config.SPEED;
this.obstacles = [];
this.started = false;
this.activated = false;
this.crashed = false;
this.paused = false;
this.resizeTimerId_ = null;
this.playCount = 0;
this.audioBuffer = null;
this.soundFx = {};
this.audioContext = null;
this.images = {};
this.imagesLoaded = 0;
loadImages(this);
};
Runner.config = {
ACCELERATION: 0.001,
BG_CLOUD_SPEED: 0.2,
BOTTOM_PAD: 10,
CLEAR_TIME: 3000,
CLOUD_FREQUENCY: 0.5,
GAMEOVER_CLEAR_TIME: 750,
GAP_COEFFICIENT: 0.6,
GRAVITY: 0.6,
INITIAL_JUMP_VELOCITY: 12,
MAX_CLOUDS: 6,
MAX_OBSTACLE_LENGTH: 3,
MAX_SPEED: 12,
MIN_JUMP_HEIGHT: 35,
MOBILE_SPEED_COEFFICIENT: 1.2,
RESOURCE_TEMPLATE_ID: "audio-resources",
SPEED: 6,
SPEED_DROP_COEFFICIENT: 3
};
Runner.defaultDimensions = {
WIDTH: DEFAULT_WIDTH,
HEIGHT: 150
};
Runner.classes = {
CANVAS: "runner-canvas",
CONTAINER: "runner-container",
CRASHED: "crashed",
ICON: "icon-offline",
TOUCH_CONTROLLER: "controller"
};
Runner.imageSources = {
LDPI: [
{ name: "CACTUS_LARGE", id: "1x-obstacle-large" },
{ name: "CACTUS_SMALL", id: "1x-obstacle-small" },
{ name: "CLOUD", id: "1x-cloud" },
{ name: "HORIZON", id: "1x-horizon" },
{ name: "RESTART", id: "1x-restart" },
{ name: "TEXT_SPRITE", id: "1x-text" },
{ name: "TREX", id: "1x-trex" }
]/*,
HDPI: [
{ name: "CACTUS_LARGE", id: "2x-obstacle-large" },
{ name: "CACTUS_SMALL", id: "2x-obstacle-small" },
{ name: "CLOUD", id: "2x-cloud" },
{ name: "HORIZON", id: "2x-horizon" },
{ name: "RESTART", id: "2x-restart" },
{ name: "TEXT_SPRITE", id: "2x-text" },
{ name: "TREX", id: "2x-trex" }
]*/
};
Runner.sounds = {
BUTTON_PRESS: "offline-sound-press",
HIT: "offline-sound-hit",
SCORE: "offline-sound-reached"
};
Runner.keycodes = {
JUMP: { "38": 1, "32": 1 }, // Up, spacebar
DUCK: { "40": 1 }, // Down
RESTART: { "13": 1 } // Enter
};
Runner.events = {
ANIM_END: "webkitAnimationEnd",
CLICK: "click",
KEYDOWN: "keydown",
KEYUP: "keyup",
MOUSEDOWN: "mousedown",
MOUSEUP: "mouseup",
RESIZE: "resize",
TOUCHEND: "touchend",
TOUCHSTART: "touchstart",
VISIBILITY: "visibilitychange",
BLUR: "blur",
FOCUS: "focus",
LOAD: "load"
};
function loadImages(runner) {
var imageSources = Runner.imageSources.LDPI;
var numImages = imageSources.length;
for (var i = numImages - 1; i >= 0; i--) {
var imgSource = imageSources[i];
runner.images[imgSource.name] = document.getElementById(
imgSource.id
);
}
init(runner);
}
function init(runner) {
runner.adjustDimensions();
runner.setSpeed();
runner.containerEl = document.createElement("div");
runner.containerEl.className = Runner.classes.CONTAINER;
// Player canvas container.
runner.canvas = createCanvas(
runner.containerEl,
runner.dimensions.WIDTH,
runner.dimensions.HEIGHT,
Runner.classes.PLAYER
);
runner.canvasCtx = runner.canvas.getContext("2d");
runner.canvasCtx.fillStyle = "#f7f7f7";
runner.canvasCtx.fill();
Runner.updateCanvasScaling(runner.canvas);
// Horizon contains clouds, obstacles and the ground.
runner.horizon = new Horizon(
runner.canvas,
runner.images,
runner.dimensions,
runner.config.GAP_COEFFICIENT
);
// Distance meter
runner.distanceMeter = new DistanceMeter(
runner.canvas,
runner.images.TEXT_SPRITE,
runner.dimensions.WIDTH
);
// Draw t-rex
runner.tRex = new Trex(runner.canvas, runner.images.TREX);
runner.outerContainerEl.appendChild(runner.containerEl);
if (IS_MOBILE) {
this.createTouchController();
}
runner.startListening();
runner.update();
window.addEventListener(
Runner.events.RESIZE,
runner.debounceResize.bind(runner)
);
}
Runner.prototype = {
updateConfigSetting: function(setting, value) {
console.log(setting, value);
//if (setting in this.config && value != undefined) {
this.config[setting] = value;
switch (setting) {
case "GRAVITY":
case "MIN_JUMP_HEIGHT":
case "SPEED_DROP_COEFFICIENT":
this.tRex.config[setting] = value;
break;
case "INITIAL_JUMP_VELOCITY":
this.tRex.setJumpVelocity(value);
break;
case "SPEED":
this.setSpeed(value);
break;
}
//}
},
/*loadImages: function() {
var imageSources = Runner.imageSources.LDPI;
var numImages = imageSources.length;
for (var i = numImages - 1; i >= 0; i--) {
var imgSource = imageSources[i];
this.images[imgSource.name] = document.getElementById(
imgSource.id
);
}
this.init();
},*/
loadSounds: function() {
this.audioContext = new AudioContext();
var resourceTemplate = document.getElementById(
this.config.RESOURCE_TEMPLATE_ID
).content;
for (var sound in Runner.sounds) {
var soundSrc = resourceTemplate.getElementById(
Runner.sounds[sound]
).src;
soundSrc = soundSrc.substr(soundSrc.indexOf(",") + 1);
var buffer = decodeBase64ToArrayBuffer(soundSrc);
// Async, so no guarantee of order in array.
this.audioContext.decodeAudioData(
buffer,
function(index, audioData) {
this.soundFx[index] = audioData;
}.bind(this, sound)
);
}
},
setSpeed: function(opt_speed) {
var speed = opt_speed || this.currentSpeed;
// Reduce the speed on smaller mobile screens.
if (this.dimensions.WIDTH < DEFAULT_WIDTH) {
var mobileSpeed =
speed *
this.dimensions.WIDTH /
DEFAULT_WIDTH *
this.config.MOBILE_SPEED_COEFFICIENT;
this.currentSpeed = mobileSpeed > speed ? speed : mobileSpeed;
} else if (opt_speed) {
this.currentSpeed = opt_speed;
}
},
/*init: function() {
this.adjustDimensions();
this.setSpeed();
this.containerEl = document.createElement("div");
this.containerEl.className = Runner.classes.CONTAINER;
// Player canvas container.
this.canvas = createCanvas(
this.containerEl,
this.dimensions.WIDTH,
this.dimensions.HEIGHT,
Runner.classes.PLAYER
);
this.canvasCtx = this.canvas.getContext("2d");
this.canvasCtx.fillStyle = "#f7f7f7";
this.canvasCtx.fill();
Runner.updateCanvasScaling(this.canvas);
// Horizon contains clouds, obstacles and the ground.
this.horizon = new Horizon(
this.canvas,
this.images,
this.dimensions,
this.config.GAP_COEFFICIENT
);
// Distance meter
this.distanceMeter = new DistanceMeter(
this.canvas,
this.images.TEXT_SPRITE,
this.dimensions.WIDTH
);
// Draw t-rex
this.tRex = new Trex(this.canvas, this.images.TREX);
this.outerContainerEl.appendChild(this.containerEl);
if (IS_MOBILE) {
this.createTouchController();
}
this.startListening();
this.update();
window.addEventListener(
Runner.events.RESIZE,
this.debounceResize.bind(this)
);
},*/
createTouchController: function() {
this.touchController = document.createElement("div");
this.touchController.className = Runner.classes.TOUCH_CONTROLLER;
},
debounceResize: function() {
if (!this.resizeTimerId_) {
this.resizeTimerId_ = setInterval(
this.adjustDimensions.bind(this),
250
);
}
},
adjustDimensions: function() {
clearInterval(this.resizeTimerId_);
this.resizeTimerId_ = null;
var boxStyles = window.getComputedStyle(this.outerContainerEl);
var padding = Number(
boxStyles.paddingLeft.substr(
0,
boxStyles.paddingLeft.length - 2
)
);
this.dimensions.WIDTH =
this.outerContainerEl.offsetWidth - padding * 2;
// Redraw the elements back onto the canvas.
if (this.canvas) {
this.canvas.width = this.dimensions.WIDTH;
this.canvas.height = this.dimensions.HEIGHT;
Runner.updateCanvasScaling(this.canvas);
this.distanceMeter.calcXPos(this.dimensions.WIDTH);
this.clearCanvas();
this.horizon.update(0, 0, true);
this.tRex.update(0);
// Outer container and distance meter.
if (this.activated || this.crashed) {
this.containerEl.style.width = this.dimensions.WIDTH + "px";
this.containerEl.style.height =
this.dimensions.HEIGHT + "px";
this.distanceMeter.update(0, Math.ceil(this.distanceRan));
this.stop();
} else {
this.tRex.draw(0, 0);
}
// Game over panel.
if (this.crashed && this.gameOverPanel) {
this.gameOverPanel.updateDimensions(this.dimensions.WIDTH);
this.gameOverPanel.draw();
}
}
},
playIntro: function() {
if (!this.started && !this.crashed) {
this.playingIntro = true;
this.tRex.playingIntro = true;
// CSS animation definition.
var keyframes =
"@-webkit-keyframes intro { " +
"from { width:" +
Trex.config.WIDTH +
"px }" +
"to { width: " +
this.dimensions.WIDTH +
"px }" +
"}";
document.styleSheets[0].insertRule(keyframes, 0);
this.containerEl.addEventListener(
Runner.events.ANIM_END,
this.startGame.bind(this)
);
this.containerEl.style.webkitAnimation =
"intro .4s ease-out 1 both";
this.containerEl.style.width = this.dimensions.WIDTH + "px";
if (this.touchController) {
this.outerContainerEl.appendChild(this.touchController);
}
this.activated = true;
this.started = true;
} else if (this.crashed) {
this.restart();
}
},
startGame: function() {
this.runningTime = 0;
this.playingIntro = false;
this.tRex.playingIntro = false;
this.containerEl.style.webkitAnimation = "";
this.playCount++;
// Handle tabbing off the page. Pause the current game.
window.addEventListener(
Runner.events.VISIBILITY,
this.onVisibilityChange.bind(this)
);
window.addEventListener(
Runner.events.BLUR,
this.onVisibilityChange.bind(this)
);
window.addEventListener(
Runner.events.FOCUS,
this.onVisibilityChange.bind(this)
);
},
clearCanvas: function() {
this.canvasCtx.clearRect(
0,
0,
this.dimensions.WIDTH,
this.dimensions.HEIGHT
);
},
update: function() {
this.drawPending = false;
var now = getTimeStamp();
var deltaTime = now - (this.time || now);
this.time = now;
if (this.activated) {
this.clearCanvas();
if (this.tRex.jumping) {
this.tRex.updateJump(deltaTime, this.config);
}
this.runningTime += deltaTime;
var hasObstacles = this.runningTime > this.config.CLEAR_TIME;
// First jump triggers the intro.
if (this.tRex.jumpCount == 1 && !this.playingIntro) {
this.playIntro();
}
// The horizon doesn't move until the intro is over.
if (this.playingIntro) {
this.horizon.update(0, this.currentSpeed, hasObstacles);
} else {
deltaTime = !this.started ? 0 : deltaTime;
this.horizon.update(
deltaTime,
this.currentSpeed,
hasObstacles
);
}
// Check for collisions.
var collision =
hasObstacles &&
checkForCollision(this.horizon.obstacles[0], this.tRex);
if (!collision) {
this.distanceRan +=
this.currentSpeed * deltaTime / this.msPerFrame;
if (this.currentSpeed < this.config.MAX_SPEED) {
this.currentSpeed += this.config.ACCELERATION;
}
} else {
this.gameOver();
}
if (
this.distanceMeter.getActualDistance(this.distanceRan) >
this.distanceMeter.maxScore
) {
this.distanceRan = 0;
}
var playAcheivementSound = this.distanceMeter.update(
deltaTime,
Math.ceil(this.distanceRan)
);
if (playAcheivementSound) {
this.playSound(this.soundFx.SCORE);
}
}
if (!this.crashed) {
this.tRex.update(deltaTime);
this.raq();
}
},
handleEvent: function(e) {
return function(evtType, events) {
switch (evtType) {
case events.KEYDOWN:
case events.TOUCHSTART:
case events.MOUSEDOWN:
this.onKeyDown(e);
break;
case events.KEYUP:
case events.TOUCHEND:
case events.MOUSEUP:
this.onKeyUp(e);
break;
}
}.bind(this)(e.type, Runner.events);
},
startListening: function() {
// Keys.
document.addEventListener(Runner.events.KEYDOWN, this);
document.addEventListener(Runner.events.KEYUP, this);
if (IS_MOBILE) {
// Mobile only touch devices.
this.touchController.addEventListener(
Runner.events.TOUCHSTART,
this
);
this.touchController.addEventListener(
Runner.events.TOUCHEND,
this
);
this.containerEl.addEventListener(
Runner.events.TOUCHSTART,
this
);
} else {
// Mouse.
document.addEventListener(Runner.events.MOUSEDOWN, this);
document.addEventListener(Runner.events.MOUSEUP, this);
}
},
stopListening: function() {
document.removeEventListener(Runner.events.KEYDOWN, this);
document.removeEventListener(Runner.events.KEYUP, this);
if (IS_MOBILE) {
this.touchController.removeEventListener(
Runner.events.TOUCHSTART,
this
);
this.touchController.removeEventListener(
Runner.events.TOUCHEND,
this
);
this.containerEl.removeEventListener(
Runner.events.TOUCHSTART,
this
);
} else {
document.removeEventListener(Runner.events.MOUSEDOWN, this);
document.removeEventListener(Runner.events.MOUSEUP, this);
}
},
onKeyDown: function(e) {
if (e.target != this.detailsButton) {
if (
!this.crashed &&
(Runner.keycodes.JUMP[String(e.keyCode)] ||
e.type == Runner.events.TOUCHSTART)
) {
if (!this.activated) {
this.loadSounds();
this.activated = true;
}
if (!this.tRex.jumping) {
this.playSound(this.soundFx.BUTTON_PRESS);
this.tRex.startJump();
}
}
if (
this.crashed &&
e.type == Runner.events.TOUCHSTART &&
e.currentTarget == this.containerEl
) {
this.restart();
}
}
// Speed drop, activated only when jump key is not pressed.
if (Runner.keycodes.DUCK[e.keyCode] && this.tRex.jumping) {
e.preventDefault();
this.tRex.setSpeedDrop();
}
},
onKeyUp: function(e) {
var keyCode = String(e.keyCode);
var isjumpKey =
Runner.keycodes.JUMP[keyCode] ||
e.type == Runner.events.TOUCHEND ||
e.type == Runner.events.MOUSEDOWN;
if (this.isRunning() && isjumpKey) {
this.tRex.endJump();
} else if (Runner.keycodes.DUCK[keyCode]) {
this.tRex.speedDrop = false;
} else if (this.crashed) {
// Check that enough time has elapsed before allowing jump key to restart.
var deltaTime = getTimeStamp() - this.time;
if (
Runner.keycodes.RESTART[keyCode] ||
(e.type == Runner.events.MOUSEUP &&
e.target == this.canvas) ||
(deltaTime >= this.config.GAMEOVER_CLEAR_TIME &&
Runner.keycodes.JUMP[keyCode])
) {
this.restart();
}
} else if (this.paused && isjumpKey) {
this.play();
}
},
raq: function() {
if (!this.drawPending) {
this.drawPending = true;
this.raqId = requestAnimationFrame(this.update.bind(this));
}
},
isRunning: function() {
return !!this.raqId;
},
gameOver: function() {
this.playSound(this.soundFx.HIT);
vibrate(200);
this.stop();
this.crashed = true;
this.distanceMeter.acheivement = false;
this.tRex.update(100, Trex.status.CRASHED);
// Game over panel.
if (!this.gameOverPanel) {
this.gameOverPanel = new GameOverPanel(
this.canvas,
this.images.TEXT_SPRITE,
this.images.RESTART,
this.dimensions
);
} else {
this.gameOverPanel.draw();
}
// Update the high score.
if (this.distanceRan > this.highestScore) {
this.highestScore = Math.ceil(this.distanceRan);
this.distanceMeter.setHighScore(this.highestScore);
}
// Reset the time clock.
this.time = getTimeStamp();
},
stop: function() {
this.activated = false;
this.paused = true;
cancelAnimationFrame(this.raqId);
this.raqId = 0;
},
play: function() {
if (!this.crashed) {
this.activated = true;
this.paused = false;
this.tRex.update(0, Trex.status.RUNNING);
this.time = getTimeStamp();
this.update();
}
},
restart: function() {
if (!this.raqId) {
this.playCount++;
this.runningTime = 0;
this.activated = true;
this.crashed = false;
this.distanceRan = 0;
this.setSpeed(this.config.SPEED);
this.time = getTimeStamp();
this.containerEl.classList.remove(Runner.classes.CRASHED);
this.clearCanvas();
this.distanceMeter.reset(this.highestScore);
this.horizon.reset();
this.tRex.reset();
this.playSound(this.soundFx.BUTTON_PRESS);
this.update();
}
},
onVisibilityChange: function(e) {
if (document.hidden || document.webkitHidden || e.type == "blur") {
this.stop();
} else {
this.play();
}
},
playSound: function(soundBuffer) {
if (soundBuffer) {
var sourceNode = this.audioContext.createBufferSource();
sourceNode.buffer = soundBuffer;
sourceNode.connect(this.audioContext.destination);
sourceNode.start(0);
}
}
};
// Updates the canvas size taking into account the backing store pixel ratio and the device pixel ratio.
// See article by Paul Lewis: https://www.html5rocks.com/en/tutorials/canvas/hidpi/
Runner.updateCanvasScaling = function(canvas, opt_width, opt_height) {
var context = canvas.getContext("2d");
// Query the various pixel ratios
var devicePxRatio = Math.floor(window.devicePixelRatio) || 1;
var backingStoreRatio = Math.floor(context.webkitBackingStorePixelRatio) || 1;
var ratio = devicePxRatio / backingStoreRatio;
// Upscale the canvas if the two ratios don't match
if (ratio !== 1) {
var oldWidth = opt_width || canvas.width;
var oldHeight = opt_height || canvas.height;
canvas.width = oldWidth * ratio;
canvas.height = oldHeight * ratio;
canvas.style.width = oldWidth + "px";
canvas.style.height = oldHeight + "px";
// Scale the context to counter the fact that we've manually scaled our canvas element.
context.scale(ratio, ratio);
return true;
}
return false;
};
var getRandomNum = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
var vibrate = duration => navigator.vibrate(duration);
function createCanvas(container, width, height, opt_classname) {
var canvas = document.createElement("canvas");
canvas.className = opt_classname
? Runner.classes.CANVAS + " " + opt_classname
: Runner.classes.CANVAS;
canvas.width = width;
canvas.height = height;
container.appendChild(canvas);
return canvas;
}
function decodeBase64ToArrayBuffer(base64String) {
var len = base64String.length / 4 * 3;
var str = atob(base64String);
var arrayBuffer = new ArrayBuffer(len);
var bytes = new Uint8Array(arrayBuffer);
for (var i = 0; i < len; i++) {
bytes[i] = str.charCodeAt(i);
}
return bytes.buffer;
}
function getTimeStamp() {
return performance.now();
}
function GameOverPanel(canvas, textSprite, restartImg, dimensions) {
this.canvas = canvas;
this.canvasCtx = canvas.getContext("2d");
this.canvasDimensions = dimensions;
this.textSprite = textSprite;
this.restartImg = restartImg;
this.draw();
}
GameOverPanel.dimensions = {
TEXT_X: 0,
TEXT_Y: 13,
TEXT_WIDTH: 191,
TEXT_HEIGHT: 11,
RESTART_WIDTH: 36,
RESTART_HEIGHT: 32
};
GameOverPanel.prototype = {
updateDimensions: function(width, opt_height) {
this.canvasDimensions.WIDTH = width;
if (opt_height) {
this.canvasDimensions.HEIGHT = opt_height;
}
},
draw: function() {
var dimensions = GameOverPanel.dimensions;
var centerX = this.canvasDimensions.WIDTH / 2;
// Game over text.
var textSourceX = dimensions.TEXT_X;
var textSourceY = dimensions.TEXT_Y;
var textSourceWidth = dimensions.TEXT_WIDTH;
var textSourceHeight = dimensions.TEXT_HEIGHT;
var textTargetX = Math.round(centerX - dimensions.TEXT_WIDTH / 2);
var textTargetY = Math.round(
(this.canvasDimensions.HEIGHT - 25) / 3
);
var textTargetWidth = dimensions.TEXT_WIDTH;
var textTargetHeight = dimensions.TEXT_HEIGHT;
var restartSourceWidth = dimensions.RESTART_WIDTH;
var restartSourceHeight = dimensions.RESTART_HEIGHT;
var restartTargetX = centerX - dimensions.RESTART_WIDTH / 2;
var restartTargetY = this.canvasDimensions.HEIGHT / 2;
if (IS_HIDPI) {
textSourceY *= 2;
textSourceX *= 2;
textSourceWidth *= 2;
textSourceHeight *= 2;
restartSourceWidth *= 2;
restartSourceHeight *= 2;
}
// Game over text from sprite.
this.canvasCtx.drawImage(
this.textSprite,
textSourceX,
textSourceY,
textSourceWidth,
textSourceHeight,
textTargetX,
textTargetY,
textTargetWidth,
textTargetHeight
);
// Restart button.
this.canvasCtx.drawImage(
this.restartImg,
0,
0,
restartSourceWidth,
restartSourceHeight,
restartTargetX,
restartTargetY,
dimensions.RESTART_WIDTH,
dimensions.RESTART_HEIGHT
);
}
};
function checkForCollision(obstacle, tRex, opt_canvasCtx) {
var obstacleBoxXPos = Runner.defaultDimensions.WIDTH + obstacle.xPos;
// Adjustments are made to the bounding box as there is a 1 pixel white
// border around the t-rex and obstacles.
var tRexBox = new CollisionBox(
tRex.xPos + 1,
tRex.yPos + 1,
tRex.config.WIDTH - 2,
tRex.config.HEIGHT - 2
);
var obstacleBox = new CollisionBox(
obstacle.xPos + 1,
obstacle.yPos + 1,
obstacle.typeConfig.width * obstacle.size - 2,
obstacle.typeConfig.height - 2
);
// Debug outer box
if (opt_canvasCtx) {
drawCollisionBoxes(opt_canvasCtx, tRexBox, obstacleBox);
}
// Simple outer bounds check.
if (boxCompare(tRexBox, obstacleBox)) {
var collisionBoxes = obstacle.collisionBoxes;
var tRexCollisionBoxes = Trex.collisionBoxes;
// Detailed axis aligned box check.
for (var t = 0; t < tRexCollisionBoxes.length; t++) {
for (var i = 0; i < collisionBoxes.length; i++) {
// Adjust the box to actual positions.
var adjTrexBox = createAdjustedCollisionBox(
tRexCollisionBoxes[t],
tRexBox
);
var adjObstacleBox = createAdjustedCollisionBox(
collisionBoxes[i],
obstacleBox
);
var crashed = boxCompare(adjTrexBox, adjObstacleBox);
// Draw boxes for debug.
if (opt_canvasCtx) {
drawCollisionBoxes(
opt_canvasCtx,
adjTrexBox,
adjObstacleBox
);
}
if (crashed) {
return [adjTrexBox, adjObstacleBox];
}
}
}
}
return false;
}
function createAdjustedCollisionBox(box, adjustment) {
return new CollisionBox(
box.x + adjustment.x,
box.y + adjustment.y,
box.width,
box.height
);
}
function drawCollisionBoxes(canvasCtx, tRexBox, obstacleBox) {
canvasCtx.save();
canvasCtx.strokeStyle = "#f00";
canvasCtx.strokeRect(
tRexBox.x,
tRexBox.y,
tRexBox.width,
tRexBox.height
);
canvasCtx.strokeStyle = "#0f0";
canvasCtx.strokeRect(
obstacleBox.x,
obstacleBox.y,
obstacleBox.width,
obstacleBox.height
);
canvasCtx.restore();
}
function boxCompare(tRexBox, obstacleBox) {
var crashed = false;
var tRexBoxX = tRexBox.x;
var tRexBoxY = tRexBox.y;
var obstacleBoxX = obstacleBox.x;
var obstacleBoxY = obstacleBox.y;
// Axis-Aligned Bounding Box method.
if (
tRexBox.x < obstacleBoxX + obstacleBox.width &&
tRexBox.x + tRexBox.width > obstacleBoxX &&
tRexBox.y < obstacleBox.y + obstacleBox.height &&
tRexBox.height + tRexBox.y > obstacleBox.y
) {
crashed = true;
}
return crashed;
}
function CollisionBox(x, y, w, h) {
this.x = x;
this.y = y;
this.width = w;
this.height = h;
}
function Obstacle(
canvasCtx,
type,
obstacleImg,
dimensions,
gapCoefficient,
speed
) {
this.canvasCtx = canvasCtx;
this.image = obstacleImg;
this.typeConfig = type;
this.gapCoefficient = gapCoefficient;
this.size = getRandomNum(1, Obstacle.MAX_OBSTACLE_LENGTH);
this.dimensions = dimensions;
this.remove = false;
this.xPos = 0;
this.yPos = this.typeConfig.yPos;
this.width = 0;
this.collisionBoxes = [];
this.gap = 0;
this.init(speed);
}
Obstacle.MAX_GAP_COEFFICIENT = 1.5;
Obstacle.MAX_OBSTACLE_LENGTH = 3;
Obstacle.prototype = {
init: function(speed) {
this.cloneCollisionBoxes();
// Only allow sizing if we're at the right speed.
if (this.size > 1 && this.typeConfig.multipleSpeed > speed) {
this.size = 1;
}
this.width = this.typeConfig.width * this.size;
this.xPos = this.dimensions.WIDTH - this.width;
this.draw();
// Make collision box adjustments,
// Central box is adjusted to the size as one box.
// | |<->| | | |<--->| | | |<----->| |
// | | 1 | | | | 2 | | | | 3 | |
// |_|___|_| |_|_____|_| |_|_______|_|
if (this.size > 1) {
this.collisionBoxes[1].width =
this.width -
this.collisionBoxes[0].width -
this.collisionBoxes[2].width;
this.collisionBoxes[2].x =
this.width - this.collisionBoxes[2].width;
}
this.gap = this.getGap(this.gapCoefficient, speed);
},
draw: function() {
var sourceWidth = this.typeConfig.width;
var sourceHeight = this.typeConfig.height;
if (IS_HIDPI) {
sourceWidth = sourceWidth * 2;
sourceHeight = sourceHeight * 2;
}
// Sprite
var sourceX = sourceWidth * this.size * (0.5 * (this.size - 1));
this.canvasCtx.drawImage(
this.image,
sourceX,
0,
sourceWidth * this.size,
sourceHeight,
this.xPos,
this.yPos,
this.typeConfig.width * this.size,
this.typeConfig.height
);
},
update: function(deltaTime, speed) {
if (!this.remove) {
this.xPos -= Math.floor(speed * FPS / 1000 * deltaTime);
this.draw();
if (!this.isVisible()) {
this.remove = true;
}
}
},
getGap: function(gapCoefficient, speed) {
var minGap = Math.round(
this.width * speed + this.typeConfig.minGap * gapCoefficient
);
var maxGap = Math.round(minGap * Obstacle.MAX_GAP_COEFFICIENT);
return getRandomNum(minGap, maxGap);
},
isVisible: function() {
return this.xPos + this.width > 0;
},
cloneCollisionBoxes: function() {
var collisionBoxes = this.typeConfig.collisionBoxes;
for (var i = collisionBoxes.length - 1; i >= 0; i--) {
this.collisionBoxes[i] = new CollisionBox(
collisionBoxes[i].x,
collisionBoxes[i].y,
collisionBoxes[i].width,
collisionBoxes[i].height
);
}
}
};
Obstacle.types = [
{
type: "CACTUS_SMALL",
className: " cactus cactus-small ",
width: 17,
height: 35,
yPos: 105,
multipleSpeed: 3,
minGap: 120,
collisionBoxes: [
new CollisionBox(0, 7, 5, 27),
new CollisionBox(4, 0, 6, 34),
new CollisionBox(10, 4, 7, 14)
]
},
{
type: "CACTUS_LARGE",
className: " cactus cactus-large ",
width: 25,
height: 50,
yPos: 90,
multipleSpeed: 6,
minGap: 120,
collisionBoxes: [
new CollisionBox(0, 12, 7, 38),
new CollisionBox(8, 0, 7, 49),
new CollisionBox(13, 10, 10, 38)
]
}
];
function Trex(canvas, image) {
this.canvas = canvas;
this.canvasCtx = canvas.getContext("2d");
this.image = image;
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