Add surfaces and solids to the list of primitives:
- Quadratic surfaces: “paraboloid” (elliptic and hyperbolic) and “hyperboloid” (single-roof).
- Prism with triangular base, square, pentagonal, hexagonal etc. (similar to the pyramid construction).
- Polygonal tubular shape (only the circular one exists.) Why not insert a polygonal?)
- sinusoidal curve and logarithmic spiral
(Many CAD do not have these elements. Rhino would be an exclusive!)