I want to project a rotating earth on a transparent sperical segment. I use a patch that came with the demo of vvvv last year. rotation and everything works fine.
I think I must project my renderer output onto a 3d world in v4 . right? where can I find a simple mapping example?
my earth rotates in the x direction. (actually i ignore the tilted earth axis) Now, the user can use a slider to shift the earth between the booth polar ice caps. When I change the z rotation I must also change the y rotation to get the effect the user expects. is there a mathematical description anywhere to do this?