116 lines
2.1 KiB
JavaScript
Executable file
116 lines
2.1 KiB
JavaScript
Executable file
ig.module(
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'impact.system'
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)
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.requires(
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'impact.timer',
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'impact.image'
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)
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.defines(function(){
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ig.System = ig.Class.extend({
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fps: 30,
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width: 320,
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height: 240,
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realWidth: 320,
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realHeight: 240,
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scale: 1,
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tick: 0,
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intervalId: 0,
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newGameClass: null,
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running: false,
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delegate: null,
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clock: null,
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canvas: null,
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context: null,
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smoothPositioning: true,
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init: function( canvasId, fps, width, height, scale ) {
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this.fps = fps;
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this.clock = new ig.Timer();
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this.canvas = ig.$(canvasId);
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this.resize( width, height, scale );
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this.context = this.canvas.getContext('2d');
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},
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resize: function( width, height, scale ) {
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this.width = width;
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this.height = height;
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this.scale = scale || this.scale;
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this.realWidth = this.width * this.scale;
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this.realHeight = this.height * this.scale;
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this.canvas.width = this.realWidth;
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this.canvas.height = this.realHeight;
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},
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setGame: function( gameClass ) {
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if( this.running ) {
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this.newGameClass = gameClass;
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}
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else {
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this.setGameNow( gameClass );
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}
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},
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setGameNow: function( gameClass ) {
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ig.game = new (gameClass)();
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ig.system.setDelegate( ig.game );
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},
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setDelegate: function( object ) {
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if( typeof(object.run) == 'function' ) {
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this.delegate = object;
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this.startRunLoop();
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} else {
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throw( 'System.setDelegate: No run() function in object' );
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}
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},
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stopRunLoop: function() {
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clearInterval( this.intervalId );
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this.running = false;
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},
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startRunLoop: function() {
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this.stopRunLoop();
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this.intervalId = setInterval( this.run.bind(this), 1000 / this.fps );
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this.running = true;
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},
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clear: function( color ) {
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this.context.fillStyle = color;
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this.context.fillRect( 0, 0, this.realWidth, this.realHeight );
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},
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run: function() {
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ig.Timer.step();
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this.tick = this.clock.tick();
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this.delegate.run();
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ig.input.clearPressed();
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if( this.newGameClass ) {
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this.setGameNow( this.newGameClass );
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this.newGameClass = null;
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}
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},
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getDrawPos: function( p ) {
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return this.smoothPositioning ? Math.round(p * this.scale) : Math.round(p) * this.scale;
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}
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});
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}); |