-
-
Save darkworks/3e6ced3c1c1a30763d48fa970e7b8c4f to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function Animation(canvasId, fps) { | |
| this.canvas = document.getElementById(canvasId); | |
| this.drawingContext = this.canvas.getContext('2d'); | |
| this.fps = fps; | |
| this.drawing = {}; | |
| this.frame = 0; | |
| this.start(); | |
| } | |
| Animation.prototype.start = function() { | |
| var t = this; | |
| this.animProcess = setInterval(function(){t.draw();}, Math.round(1.0/this.fps*1000)); | |
| this.running = true; | |
| }; | |
| Animation.prototype.draw = function() { | |
| this.drawingContext.clearRect(0, 0, this.canvas.width, this.canvas.height); | |
| for (name in this.drawing) | |
| this.drawing[name](this.drawingContext, this.frame); // run drawing procedure | |
| this.frame += 1; | |
| }; | |
| Animation.prototype.pause = function() { | |
| if (!this.running) return; | |
| clearInterval(this.animProcess); | |
| this.running = false; | |
| }; | |
| Animation.prototype.reset = function() { | |
| this.frame = 0; | |
| }; | |
| Animation.prototype.stop = function() { | |
| if (!this.running) return; | |
| this.pause(); | |
| this.reset(); | |
| }; |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| <title>Devyn's Canvas Test</title> | |
| <script src="canvas-animation.js"></script> | |
| <script> | |
| var anim; | |
| function init() { | |
| anim = new Animation('canvas', 30); | |
| anim.drawing.square = function(ctx, frame) { | |
| ctx.save(); | |
| ctx.translate(60, 60); | |
| ctx.rotate(Math.PI/180 * (frame % 360)); | |
| ctx.fillStyle = "rgb(40,40,40)"; | |
| ctx.fillRect(-30,-30,60,60); | |
| ctx.restore(); | |
| }; | |
| anim.drawing.innerSquare = function(ctx, frame) { | |
| ctx.save(); | |
| ctx.translate(60, 60); | |
| ctx.rotate(Math.PI/180 * (frame*3 % 360)); | |
| ctx.fillStyle = "#00ffff"; | |
| ctx.fillRect(-15,-15,30,30); | |
| ctx.restore(); | |
| }; | |
| } | |
| </script> | |
| </head> | |
| <body onload="init();"> | |
| <div><canvas id="canvas" width="120" height="120"></canvas></div> | |
| <div> | |
| <a href="#" onclick="if (anim.running) anim.pause(); else anim.start();">Play/Pause</a> | | |
| <a href="#" onclick="anim.stop();">Stop</a> | |
| </div> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment