transform&lightning

nope just subtract the objects position from the cameras position and get the length of that vector ie sqrt(x*x + y*y + z*z)

yes lighting is slow theres a hell of a lot of calculations to do each for each vertice, i recently down my own lighting in software. it was realtime
esp with positional lights u need a sqrt and a devide

quote:

---

Do i have to do rotations manually to get the
rotated z-coords needed for sorting?

---

Best to use the matrix at that moment. Transform coords to get the distance.

quote:

---

Does opengl rotate normals or light vectors
when calculating lightning? it seems slow...

---

I don''t know exactly, but if OpenGL is any good, or you want to do it yourself, maybe this is the answer:

- Do your translation & rotations to get the matrix
- Invert the matrix to get the inverse
*** Now you have the camera in object space!
- Use the camera pos in object space for backface culling and/or lighting.
- Now you don''t have to transform your normals. Much much faster!!!