bool CheckBoundingBoxWithSphere(R3Sphere *sphere, R3Player *player) {
R3Box bbox = player->shape->mesh->bbox;
R3Point coords[8];
coords[1] = bbox.Corner(0, 0, 0);
coords[2] = bbox.Corner(0, 0, 1);
coords[3] = bbox.Corner(0, 1, 0);
coords[4] = bbox.Corner(0, 1, 1);
coords[5] = bbox.Corner(1, 0, 0);
coords[6] = bbox.Corner(1, 0, 1);
coords[7] = bbox.Corner(1, 1, 0);
coords[8] = bbox.Corner(1, 1, 1);
// check if it is entirely within the sphere
bool in = true;
for (int i = 0; i < 8; i++) {
if (R3Distance(coords[i], sphere->Center()) < sphere->Radius()){
in = false;
break;
}
}
if (in) return false;
for (int i = 0; i < 8; i++) {
if (R3Distance(coords[i], sphere->Center()) < sphere->Radius())
return true;
}
if (R3Distance(player->pos, sphere->Center()) < sphere->Radius())
return true;
return false;
}
double R3SignedDistance(const R3Plane& plane, const R3Box& box)
{
// Return signed distance from plane to box
int ix = (plane.Normal().X() > 0) ? 0 : 1;
int iy = (plane.Normal().Y() > 0) ? 0 : 1;
int iz = (plane.Normal().Z() > 0) ? 0 : 1;
double d1 = R3SignedDistance(plane, box.Corner(ix, iy, iz));
if (d1 >= 0) return d1;
double d2 = R3SignedDistance(plane, box.Corner(1-ix, 1-iy, 1-iz));
if (d2 < 0) return d2;
else return 0.0;
}
RNBoolean R3Contains(const R3Sphere& sphere, const R3Box& box)
{
// Return whether sphere contains box
R3Vector v = box.Centroid() - sphere.Center();
R3Point corner = box.Corner(v.Octant());
return R3Contains(sphere, corner);
}
RNBoolean R3Contains(const R3Ray& ray, const R3Box& box)
{
// Return whether ray contains box
if (!R3Contains(ray.Line(), box)) return FALSE;
RNOctant octant = ray.Vector().Octant();
if (!R3Contains(ray, box.Corner(~octant & 0x7))) return FALSE;
return TRUE;
}
RNBoolean R3Contains(const R3Box& box, const R3Halfspace& halfspace)
{
// Return whether box contains halfspace
RNOctant octant = halfspace.Normal().Octant();
R3Point corner = box.Corner(octant);
if (!RNIsFinite(corner.X())) return FALSE;
if (!RNIsFinite(corner.Y())) return FALSE;
if (!RNIsFinite(corner.Z())) return FALSE;
RNAbort("Not Implemented");
return FALSE;
}
RNBoolean R3Contains(const R3Halfspace& halfspace, const R3Box& box)
{
// Return whether halfspace contains box
RNOctant octant = halfspace.Normal().Octant();
return (R3Contains(halfspace, box.Corner(~octant & 0x7)));
}
