Compute the transformation from one view coordinate system to another.

Input parameters:

1. Vw → View to process.
2. Ss → Initial coordinate system.
   • 0 → World
   • 1 → Frustum
   • 2 → Clip
3. Ts → Final coordinate system.
   • 0 → World
   • 1 → Frustum
   • 2 → Clip

Output parameters:

1. Tr → Requested transformation.