Created
September 10, 2017 10:35
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| ... | |
| scaleBy (factor) { | |
| return Vector2D(x * factor, y * factor) | |
| }, | |
| negate () { | |
| return this.scaleBy(-1) | |
| }, | |
| normalize () { | |
| return this.scaleBy(1 / this.length) | |
| } | |
| ... |
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