Solid objects are modeled in 3-D space with surface geometry. A surface is a geometry that is modeled by discrete points or smoothly curved surfaces. Each approach has a different visual effect. Discrete points let you model complex shapes such as fractal surfaces, digitized or scanned data, and fluid flow. Smoothly curved surfaces let you make geometric models of things like cones, cylinders, and spheres. The following three 3-D classes are for modeling surface shapes in 3D space: TSampledSurface3D, TSurface3D, and TSweep3D.
- TSampledSurface3D lets you create surfaces from mesh discrete 3-D points.
- TSurface3D lets you represent arbitrary NURB surfaces connected into triangles to form a smoothly curved surfaces.
- Sweep classes let you represent everything you can represent with a TSurface3D without your needing to understand NURB curves. Sweeps are created from a 2-D contour curve and a 3-D trajectory curve.
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