Contributor: SWAG SUPPORT TEAM { > Could someone please explain how to plot a 3-D points? How do you convert > a 3D XYZ value, to an XY value that can be plotted onto the screen? } Function x3d(x1, z1 : Integer) : Integer; begin x3d := Round(x1 - (z1 * Cos(Theta))); end; Function y3d(y1, z1 : Integer) : Integer; begin y3d := Round(y1 - (z1 * Sin(Theta))); end; { So a Function that plots a 3d pixel might look like this: Procedure plot3d(x, y, z : Integer); begin plot(x3d(x, z), y3d(y, z)); end; The theta above is the angle on the screen on which your are "simulating" your z axis. This is simplistic, but should get you started. Just remember you are simulating 3 dimensions on a 2 dimension media (the screen). Trig helps. ;-) }