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Detecting Collisions

Detecting Collisions. Collisions. Usually don’t test particle-particle collision Test collision with environment, e.g. ground Note: step overshoots collision Test for penetration back up or fixup. Handling collisions. v. N. tangential velocity v b unchanged

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Detecting Collisions

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  1. Detecting Collisions

  2. Collisions • Usually don’t test particle-particle collision • Test collision with environment, e.g. ground • Note: step overshoots collision • Test for penetration • back up or fixup

  3. Handling collisions v N • tangential velocity vbunchanged • normal velocity vnreflects: • coefficient of restitution • change of velocity = -(1+є)v • change of momentum Impulse = -m(1+є)v • Remember mirror reflection? Can be seen as photon particles

  4. Detecting collisions • Easy with implicit equations of surfaces • H(x,y,z)=0 at surface • H(x,y,z)<0 inside surface • So just compute H and you know that you’re inside if it’s negative • More complex with other surface definitions

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