Demonstration of Orthographic and Perspective Projection on matlab

Hi everybody I'm new to Matlab and I have a project going on about demonstrating Orthographic and Perspective Projection in MatLab. How can we demonstrate these two kinds of 3d to 2d projections, like draw a plane and perpendicular lines going from the 3d point to the plane (for Orthogonal) and a screen (may be basically a plane) and a camera point toward which the lines from the 3d points are sketched (for Perspective) and Oblique Projection . Please show me the syntax and function I can use, and if possible, a sample code for both. Thank you :D

[KAE]

You need to show what you have done so far and ask for help on a specific step, or look in the File Exchange (though I didn't see anything).