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FreeDebreuil

Line to point response

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I'm doing a simple 2d physics engine and I'm trying to get a point to bounce off a line. I already know which line it is hitting, all the angles, ect... Any help appreicated (btw, my angles go ccw).

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Generally this sort of thing is done with vector math rather than angles and trig. A simple way to 'bounce' an object is to reflect the velocity vector about the line (or plane in 3d) normal. The equation for vector reflection is:
v' = v - 2(v.n)n
Where n is the unit-length normal.

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Yes, and I'm still hacking away on it. :-D It's been in serious development for about 6 months off and on.

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