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Collision with polygon or Polyeder

Started by Mr.L Aug 30, 2012 at 3:41 PM 3 replies 1.4k views

Original Post

Aug 30, 2012 at 3:41 PM

There's something i don't understand about collision:

When i want to detect a collision between a polyeder (obstacle) and a sphere(Player), do i have to check collision between the Sphere and the polyeder(Sep. Axis th. 3d) or between the sphere and every face of the polyeder?

Faelenor

Aug 31, 2012 at 12:30 PM

The separating axis theorem will tell you if your objects collide, but not where. Then, if you need the exact point(s) of collision, you'll have to check with every face.

Mr.L

Aug 31, 2012 at 12:46 PM

Ok, thanks.

pacobarter

Aug 31, 2012 at 1:16 PM

I would build a generic triangle-triangle collision engine. You can then use that engine for just whatever "objects" you check for collision. And you can optimize the engine just ignoring the type of objects that are made of triangles.

Mr.L

Sep 1, 2012 at 11:49 AM

you mean even the player as a bunch of triangles?

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