68 lines
1.5 KiB
JavaScript
68 lines
1.5 KiB
JavaScript
"use strict";
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window.onload = function () {
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var KeyConsts = MomentumEngine.Consts.Input.Keys;
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var width = 640,
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height = 360;
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var snowflakes = new MomentumEngine.Classes.Game({
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canvas: document.getElementById("canvas"),
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width: width,
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height: height,
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fixRatio: true,
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desiredFps: 60
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});
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// Colors
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var blue = new MomentumEngine.Classes.Color(204, 255, 255);
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// All of these are instances of MomentumEngine.Classes.Entity
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var mainScene = new MomentumEngine.Classes.Rect(0, 0, width, height, blue);
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// Load images
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var snowflakeImg = new MomentumEngine.Classes.ImageLoader("./snowflake.png");
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// Create scene graph
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snowflakes.addChildEntity(mainScene);
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mainScene.update = function (delta) {
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if ((snowflakes.frameCounter % 120) == 0) { // Every two seconds or so, add a new snowflake
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var startPos = (Math.random() * width) - 50;
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var newSnowflake = new MomentumEngine.Classes.Sprite(startPos, -100, 100, 100, snowflakeImg);
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newSnowflake.update = function () {
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this.pos.y = this.pos.y + (delta * 0.06);
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};
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mainScene.addChildEntity(newSnowflake);
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mainScene.children.forEach(function (oldSnowflake) {
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if (oldSnowflake.pos.y > height) {
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// Clean up snowflakes that are no longer visible
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mainScene.detachChildEntity(oldSnowflake);
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}
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});
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}
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};
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snowflakes.start();
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}; |