gszauer/gamephysicscookbook

Source code for Game Physics Cookbook

gamephysicscookbook's Issues

Querying the octree with a sphere doesn't work

I've already tried multiple times to implement all the geometry code described by both this repository's latest version and the book and it seems that querying the octree for a sphere is always returning wrong results.
That doesn't happen when querying an AABB. That method seems to be working just fine.
The last try I did just a copy-paste of all the library but the error still persists.

ModelPlane doesn't modify the plane's normal

In the ModelPlane function, the plane's normal is transformed by the model's inverse world matrix as needed, but the distance from origin isn't - eg, take a point on the plane, multiply it by the inverse world matrix, and dot it against the transformed normal to get the transformed distance.

no issue

......

GetInterval in OBBOBB test

I was looking on OBB vs OBB test and found that it's calling GetInterval() with obb1 twice.

GamePhysicsCookbook/Code/Geometry3D.cpp

Lines 384 to 388 in 15810bb

	bool OverlapOnAxis(const OBB& obb1, const OBB& obb2, const vec3& axis) {
	Interval a = GetInterval(obb1, axis);
	Interval b = GetInterval(obb1, axis);
	return ((b.min <= a.max) && (a.min <= b.max));
	}

Is this intentional? or is second call supposed to be with obb2?