∙ From the formula of rotation conversion, the viewpoint coordinates after conversion and the screen screen coordinates after conversion are expressed by the following formula.

 A, B, C, D, E, F, G, H, I: Rotation matrix parameters
Px, Py, Pz: viewpoint coordinates before rotation conversion
Sx, Sy, Sz: Screen screen coordinates before rotation conversion
Cx, Cy, Cz: Center coordinates of rotation
Mx, My, Mz: parallel displacement
Xp, Yp, Zp: Viewpoint coordinates after rotation conversion
Xs, Ys, Zs: Screen screen coordinates after rotation conversion