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About alterecho

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  1. Normal n of surface to calculate impulse

    I apologize for the late reply. I am now calculating the normal to the surface by finding the velocity of the contact point and then normalizing that velocity. This does seem to give me the normal for that surface of contact. Is this right?
  2. Hi, I'm trying to use the equation from Wikipedia ([url="http://en.wikipedia.org/wiki/Collision_response"]http://en.wikipedia....lision_response[/url]) to find the impulse of a collision. How do i find the surface normal n, which is a unit vector?
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