Implicit Primitives Polyhedron Primitives half, arb4-arb8, rpp, arbn Ruled Surface Primitives rcc, rec, tec, trc, tgc Quadric Surface Bounded Volume Primitives sph, ell, ell1, rpc, rhc, epa, ehy, hyp Quartic Surface Bounded Volume Primitives tor, eto Composite Implicit Primitives pipe, part Explicit Primitives Two Dimensional Primitives sketch Primitives Based on Transforms of Two Dimensional Data extrude, revolve, [sweep] Polygonal Boundary Representations bot, nmg Spline Surface Boundary Representations brep Volumetric Representations ebm, hf, dsp Non-Geometric Primitives grip