315 lines
8.7 KiB
JavaScript
315 lines
8.7 KiB
JavaScript
class Scene extends Screen {
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constructor(canvas, player) {
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super(canvas);
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this.player = player;
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this.currentHeight = 0;
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if (this.maxHeight === undefined) {
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this.maxHeight = 0;
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}
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this.initialize();
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this.addEventListener('touchstart', (event) => {
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this.onTouchStart(event);
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});
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}
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get maxHeight() {
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return window.localStorage.getItem("maxHeight");
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}
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set maxHeight(value) {
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window.localStorage.setItem("maxHeight", value);
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}
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initialize() {
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super.initialize();
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this.player.reset();
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this.platforms = [];
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this.cameraHeight = 0;
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this.cameraSpeed = 0;
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this.currentHeight = 0;
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this.started = false;
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// The the line for the high score
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this.currentMaxHeight = this.maxHeight;
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// Generate random initial platforms
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for (let i = 0.25; i <= 2; i += 0.33) {
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let platform = new Platform(Math.random(), i, 0.2);
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this.addPlatform(platform);
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}
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}
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start() {
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if (!this.started) {
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this.started = true;
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this.cameraSpeed = 0.0005;
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}
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}
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drawBackground() {
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let pattern = this.context.createPattern(Scene.background, 'repeat');
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this.context.fillStyle = pattern;
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this.context.beginPath();
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this.context.rect(0, - this.cameraHeight * this.height(), this.width(), this.height());
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this.context.fill();
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}
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update(time = 0.02) {
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if (this.wakingTimer !== undefined) {
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this.wakingTimer -= time;
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if (this.wakingTimer < 0) {
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this.wakingTimer = undefined;
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this.status = Status.Running;
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}
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}
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if (this.status !== Status.Running) {
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return;
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}
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// Check if the game is lost
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if (this.player.y + this.player.size < this.cameraHeight) {
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this.initialize();
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}
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// The last platform is the highest.
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let last = this.platforms[this.platforms.length - 1];
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// If the last platform is on screen, we need to create the next platform.
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if (last.y <= this.cameraHeight + 1) {
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let diff = 0.1 + Math.random() * 0.4;
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let platform = new Platform(Math.random(), last.y + diff, 0.2);
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this.platforms.push(platform);
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}
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// Increase position of the camera
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this.cameraHeight += this.cameraSpeed * time * this.height();
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// Update high score
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this.maxHeight = Math.max(this.player.y, this.maxHeight);
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this.currentHeight = Math.max(this.player.y, this.currentHeight);
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let previous = {
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x: this.player.x,
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y: this.player.y + this.player.size / 2,
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};
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this.player.update(time);
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let next = {
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x: this.player.x,
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y: this.player.y + this.player.size / 2,
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size: this.player.size,
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};
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// Detect collision with platform
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for (let platform of this.platforms) {
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let p = {
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x: platform.x,
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y: platform.y + platform.height / 2,
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width: platform.width,
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height: platform.height,
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};
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if (previous.y >= p.y && next.y < p.y) {
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if (next.x >= p.x - p.width / 2 - next.size / 4) {
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if (next.x <= p.x + p.width / 2 + next.size / 4) {
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// Collision detected
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this.player.collide(p.y - next.size/2);
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}
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}
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}
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}
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// Collision with the ground
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if (this.player.y <= 0) {
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this.player.collide(0);
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}
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// Collisions with the border of the screen
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this.player.x = Math.max(this.player.x, this.player.size / 4);
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this.player.x = Math.min(this.player.x, 1 - this.player.size / 4);
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}
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addPlatform(object) {
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this.platforms.push(object);
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}
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render() {
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this.clear();
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this.context.translate(0, this.cameraHeight * this.height());
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this.drawBackground();
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this.drawHighScoreLine();
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for (let platform of this.platforms) {
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this.drawPlatform(platform);
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}
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this.drawObject(this.player);
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this.context.resetTransform();
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this.drawHud();
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}
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drawHighScoreLine() {
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if (this.currentMaxHeight <= 0) {
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return;
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}
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let height = this.height() * (1 - this.currentMaxHeight - this.player.size / 2);
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this.context.strokeStyle = 'rgb(255, 255, 255)';
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this.context.beginPath();
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this.context.moveTo(0, height);
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this.context.lineTo(this.width(), height);
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this.context.stroke();
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this.context.save();
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this.context.translate(0, height);
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let pattern = this.context.createPattern(Scene.highscore, 'repeat');
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this.context.fillStyle = pattern;
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this.context.beginPath();
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this.context.rect(0, 0, this.width(), 32);
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this.context.fill();
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this.context.restore();
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this.context.font = "15px Arial";
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this.context.fillStyle = "rgb(255, 255, 255)";
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this.context.fillText("High score: " + Math.floor(100 * this.currentMaxHeight), 0, height - 5);
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}
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drawObject(object) {
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let size = object.size * this.width();
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this.context.drawImage(
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Box.texture,
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0, 64 * this.player.frameNumber, 64, 64,
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(object.x - object.size / 2) * this.width(),
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(1 - object.y - object.size / 2) * this.height(),
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size, size
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);
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}
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drawPlatform(object) {
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let width = object.width * this.width();
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let height = object.height * this.height();
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this.context.drawImage(
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Platform.texture,
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0, 0, 64, 64,
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(object.x - object.width / 2) * this.width(),
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(1 - object.y - object.height / 2) * this.height(),
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width, width,
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);
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}
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drawHud() {
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// Draw scores
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let fontSize = 20;
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this.context.font = fontSize + "px Arial";
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this.context.fillStyle = 'rgb(255, 255, 255)';
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this.context.fillText("Score: " + Math.floor(100 * this.currentHeight), 0, 20);
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// Draw pause buttons
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let box = this.makePauseBox();
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this.context.fillStyle = 'rgba(255, 255, 255, 0.5)';
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this.context.beginPath();
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this.context.rect(box.x, box.y, box.width, box.height);
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this.context.fill();
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this.context.fillStyle = 'rgba(0, 0, 0, 0.5)';
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this.context.beginPath();
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this.context.rect(
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box.x + box.width * 0.3,
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box.y + box.height * 0.1,
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box.width * 0.1,
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box.height * 0.8,
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);
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this.context.fill();
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this.context.beginPath();
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this.context.rect(
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box.x + box.width * 0.6,
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box.y + box.height * 0.1,
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box.width * 0.1,
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box.height * 0.8,
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);
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this.context.fill();
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if (this.status === Status.Paused || this.status === Status.Waking) {
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let fontSize = 50;
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this.context.font = fontSize + "px Arial";
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this.context.beginPath();
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this.context.rect(0, 0, this.width(), this.height());
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this.context.fill();
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let text = this.status === Status.Paused ? "Paused" : Math.floor(this.wakingTimer + 1);
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text = text + "";
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this.context.fillStyle = 'rgb(255, 255, 255)';
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let size = this.context.measureText(text).width;
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this.context.fillText(text, (this.width() - size) / 2, this.height() / 2 + fontSize);
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}
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}
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makePauseBox() {
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let startX = 0.85;
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let startY = 0.05;
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let size = 0.1;
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return {
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x: startX * this.width(),
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y: startY * this.width(),
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width: size * this.width(),
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height: size * this.width(),
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};
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}
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onTouchStart(event) {
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let e = event.changedTouches[0];
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if (this.started) {
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if (this.status === Status.Running && isInBox(position(e), this.makePauseBox())) {
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this.status = Status.Paused;
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} else if (this.status === Status.Paused) {
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this.status = Status.Waking;
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this.wakingTimer = 3;
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}
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}
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this.start();
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if (e !== undefined) {
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this.player.jump(e.clientX / window.innerWidth, e.clientY / window.innerHeight);
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}
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}
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}
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Scene.background = new Image();
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Scene.background.src = "img/background.png";
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Scene.highscore = new Image();
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Scene.highscore.src = "img/highscore.png";
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