Do keep in mind that there is a basic command-driven interface behind Geogebra as well. You can actually literally enter the following into their "3D Calculator":
A=(1,2,3) B=(4,5,6) L=Segment(A, B) P=Midpoint(L) r=Length(L) C=Circle(P, r) where the system automatically translates the last command (which does not fully determine a circle in 3-space) to: C: Circle(P,r,xOyPlane) It looks like it's difficult to get at their programmatic interface. They do have scripting, which may provide an interface that's a little easier to work with. It may still be that there's a market for this in sagemath/python; or it may be an enjoyable recreational project to work on. But before you set off on it, it's probably good to know what prior art is available, and it looks like at least the start of what you'd be doing is reimplementing a lot of the things geogebra already has. On the python front, it looks like Sympy (which we already include) may have a start for you: https://docs.sympy.org/latest/modules/geometry/ -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/8095b0b4-6136-4704-8668-5bce977c3b01n%40googlegroups.com.
