Procedural surfaces can be created from linear objects, with some commands presented in Chapter 4, Creating Solids and Surfaces from 2D, such as
SWEEP, also with
PLANESURF, presented in Chapter 5, 3D Primitives and Conversions, and with
SURFNETWORK, presented next section. These surfaces can also be obtained from other surfaces, applying known operations such as blend, fillet, or offset. Included are also two editing commands and a command to create solids from surfaces.
SURFACEMODELINGMODE variable must have value
0. With value
1, NURBS surfaces are created instead when applying next commands. The
SURFV variables control the surface isolines density in the first and second directions and can be modified any time with the