that lets you do drawings like that Unix had "ideal", a remarkable language by Chris Van Wyk, based on complex numbers and capable of some constraint solving. Its code seemed to be lost but can now be found in one of the online v10 repositories. I've been meaning to try to resurrect it. If anyone has already done so, I'd love to hear about it. I, too, have some pic macros, though no big coherent packages, to do things like polar coordinates and solving for the intersection of lines and circles. I have even in extremis made filled triangles with scripts that massage PostScript by deleting corners of filled rectangles. Then from triangles you can, with patience, make polygons. Doug