bool PlaneCullTest(const Plane3& plane, const AABB3& box){
Vector3 testVertex;
// find the vertex with the greatest distance value
if(plane.n.x >= 0.f){
if(plane.n.y >= 0.f){
if(plane.n.z >= 0.f){
testVertex = box.max;
}else{
testVertex = MakeVector3(box.max.x, box.max.y, box.min.z);
}
}else{
if(plane.n.z >= 0.f){
testVertex = MakeVector3(box.max.x, box.min.y, box.max.z);
}else{
testVertex = MakeVector3(box.max.x, box.min.y, box.min.z);
}
}
}else{
if(plane.n.y >= 0.f){
if(plane.n.z >= 0.f){
testVertex = MakeVector3(box.min.x, box.max.y, box.max.z);
}else{
testVertex = MakeVector3(box.min.x, box.max.y, box.min.z);
}
}else{
if(plane.n.z >= 0.f){
testVertex = MakeVector3(box.min.x, box.min.y, box.max.z);
}else{
testVertex = box.min;
}
}
}
return plane.GetDistanceTo(testVertex) >= 0.f;
}
static Segment ZRange(Vector3 base, Vector3 dir,
Plane3 plane1, Plane3 plane2){
return Segment(plane1.GetDistanceTo(base)/Vector3::Dot(dir,plane1.n),
plane2.GetDistanceTo(base)/Vector3::Dot(dir,plane2.n));
}
