Created
November 24, 2015 06:22
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| x += velocity * Math.cos(angle * Math.PI /180); | |
| y += velocity * Math.sin(angle * Math.PI /180); | |
| if (x < 0 || x > canvas.width) { | |
| angle = 180 - angle; | |
| } | |
| else if (y < 0 ||y > canvas.height) { | |
| angle = 360 - angle; | |
| } |
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