World to Eye Coordinates
•We need to transform from the world coordinates to the eye coordinates
•The eye coordinate system is specified by:
–View reference point (VRP)
•(VRPx, VRPy, VRPz)
–Direction of the axes: eye coordinate system
•U = (ux, uy, uz)
•V = (vx, vy, vz)
•N = (nx, ny, nz)