Central projection of a Cube - Perspective
Exercise
Change your position with right mouse button and view the construction from different sides.
- Move the position of the center of the projection in horizontal and vertical direction.
 - Show the horizontal plane and auxiliary lines by clicking on the check boxes.
 - Enlarge oder shorten the sphere by moving point B.
 - Choose front elevation (upright projection) in the style bar.
 - The position of the image plane can moved with point P.
 
Andreas Lindner