Created
August 23, 2013 16:23
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JS Bin math visualisation competition entry. Working version can be seen here: http://jsbin.com/oyecax/2/
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta name="description" content="JS Bin Competition Entry" /> | |
| <script src="http://ajax.googleapis.com/ajax/libs/dojo/1.8/dojo/dojo.js"></script> | |
| <meta charset=utf-8 /> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <div id="surface"></div> | |
| </body> | |
| </html> |
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| require(['dojox/gfx', 'dojox/gfx/fx'], function(gfx){ | |
| var angle = 0, | |
| width = 500, | |
| height = 500, | |
| x = width / 2, | |
| y = height / 2, | |
| surface = gfx.createSurface('surface', width, height), | |
| ellipses = [], | |
| movingTarget = surface.createGroup(); | |
| //Red Circle | |
| surface.createCircle({ | |
| cx: x, | |
| cy: y, | |
| r: 50 | |
| }).setStroke('red'); | |
| for(var i = 0; i < 4; i++){ | |
| ellipses[i] = surface.createEllipse({ | |
| cx: x, | |
| cy: y, | |
| rx: 150, | |
| ry: 50 | |
| }).setStroke('red').applyTransform(gfx.matrix.rotategAt(45 * i, x, y)); | |
| } | |
| //Blue Circle | |
| surface.createCircle({ | |
| cx: x, | |
| cy: y, | |
| r: 100 | |
| }).setStroke('blue'); | |
| surface.createLine({ | |
| x1: x - 100, | |
| y1: y, | |
| x2 : x + 100, | |
| y2: y | |
| }).setStroke('blue'); | |
| surface.createLine({ | |
| x1: x, | |
| y1: y -100, | |
| x2 : x, | |
| y2: y + 100 | |
| }).setStroke('blue'); | |
| //Black Moving Target | |
| movingTarget.createLine({ | |
| x1: - 100, | |
| y1: 0, | |
| x2: 100, | |
| y2: 0 | |
| }).setStroke('black'); | |
| movingTarget.createLine({ | |
| x1: 0, | |
| y1: -100, | |
| x2: 0, | |
| y2: 100 | |
| }).setStroke('black'); | |
| movingTarget.createCircle({ | |
| cx: 0, | |
| cy: 0, | |
| r: 3 | |
| }).setStroke('black'); | |
| movingTarget.createCircle({ | |
| cx: 0, | |
| cy: -100, | |
| r: 3 | |
| }).setStroke('black'); | |
| movingTarget.createCircle({ | |
| cx: 0, | |
| cy: 100, | |
| r: 3 | |
| }).setStroke('black'); | |
| movingTarget.createCircle({ | |
| cx: 100, | |
| cy: 0, | |
| r: 3 | |
| }).setStroke('black'); | |
| movingTarget.createCircle({ | |
| cx: 50, | |
| cy: 0, | |
| r: 4 | |
| }).setStroke('blue'); | |
| movingTarget.createCircle({ | |
| cx: 0, | |
| cy: 0, | |
| r: 50 | |
| }).setStroke('blue'); | |
| movingTarget.createCircle({ | |
| cx: -50, | |
| cy: 0, | |
| r: 4 | |
| }).setStroke('blue'); | |
| movingTarget.createCircle({ | |
| cx: -100, | |
| cy: 0, | |
| r: 3 | |
| }).setStroke('black'); | |
| movingTarget.moveToFront(); | |
| function draw() { | |
| var x2 = Math.cos(angle * Math.PI / 180) * 50, | |
| y2 = Math.sin(angle * Math.PI / 180) * 50; | |
| movingTarget.setTransform(gfx.matrix.translate({ x : x + x2, y : y + y2})); | |
| movingTarget.applyTransform(gfx.matrix.rotateg(-angle)); | |
| angle++; | |
| setTimeout(draw, 16); | |
| } | |
| draw(); | |
| }); |
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