If you are referring to SolveSpace, OpenSCAD is text-based, and you build your geometry programmatically.<p>SolveSpace has a CAD viewer interface, and you draw and constrain your geometry.
I use FreeCAD as an alternative to AutoCAD (Inventor, Fusion360), but I have used SolveSpace for a small project where I wanted to animate the linkage for a client. The same could have been done in Fusion360 too. It was for fun.<p>The latest FreeCAD has greatly improved animation capabilities for renderings.<p>You can use SolveSpace&#x27;s constraint solver in your own project, since I believe, it is separate from the viewer code. It is a very nice piece of work by one individual. I follow it once or twice a year to see if people are going to add much more to it.