// clip this line segment against this triangle.
bool clip(const Vector3d &start,Vector3d &end) const
{
Vector3d sect;
bool hit = lineIntersectsTriangle(start.Ptr(), end.Ptr(), mP1.Ptr(), mP2.Ptr(), mP3.Ptr(), sect.Ptr() );
if ( hit )
{
end = sect;
}
return hit;
}
void addTri(VertexLookup vl,UintVector &list,const Vector3d &p1,const Vector3d &p2,const Vector3d &p3)
{
unsigned int i1 = Vl_getIndex(vl, p1.Ptr() );
unsigned int i2 = Vl_getIndex(vl, p2.Ptr() );
unsigned int i3 = Vl_getIndex(vl, p3.Ptr() );
// do *not* process degenerate triangles!
if ( i1 != i2 && i1 != i3 && i2 != i3 )
{
list.push_back(i1);
list.push_back(i2);
list.push_back(i3);
}
}
float raySect(const Vector3d &p,const Vector3d &dir,Vector3d §) const
{
float plane[4];
plane[0] = mNormal.x;
plane[1] = mNormal.y;
plane[2] = mNormal.z;
plane[3] = mPlaneD;
Vector3d dest = p+dir*100000;
intersect( p.Ptr(), dest.Ptr(), sect.Ptr(), plane );
return sect.Distance(p); // return the intersection distance.
}
float planeDistance(const Vector3d &p) const
{
float plane[4];
plane[0] = mNormal.x;
plane[1] = mNormal.y;
plane[2] = mNormal.z;
plane[3] = mPlaneD;
return DistToPt( p.Ptr(), plane );
}