On Fri 19 Jan 2018 at 19:50:11 (-0800), Dan Hitt wrote: > I'm looking for a gui drawing program that will let me, for example, > draw a circle, inscribe a square in the circle, connect the opposite > edges of the square with line segments, draw the diagonals of the > square, and label the vertices, edges, and regions of the figure. > > So, something like xfig, except that it should have geometrically > describable grouping or linking options. (You can glue objects > together with xfig, but afaik not link them loosely, like through a > point of tangency.) > > I.e., if i draw two primitives (like a square and a circle), then it > should be possible to demand that they stay tangent, or that the > corners of the square be on the cricle (inscription), and these > relations will continue to hold if one primitive or the other is > resized or scaled or moved (and the relations should be recorded as > some kind of constraints in the file format). > > Maybe some kind of svg editor is capable of doing this? > > Anyhow, tia for any pointers.
That sounds very much like Cabri Géomètre at http://www.cabri.net/ but it's not available for linux, except possibly in a java/browser version. Note that it's also of French origin. You might want to scour https://alternativeto.net/software/cabri/ for possibilities. Cheers, David.
