3-D graphics classes
The 3-D graphics classes are described in Chapter 14, and this chapter provides a series of simple examples of creating and manipulating them. The 3-D graphics classes consist of curve, line, polyline, surface, and sweep classes. The surface and sweep classes let you model solid surface shapes. The curve, line, and polyline classes parallel the 2-D curve, line, and polyline classes, but take an extra z coordinate point.
The surface and sweep classes provide two approaches to modeling solid surfaces.
- Use TSampledSurface3D to create quadratic shapes and flat surfaces where the contour is defined by discrete points. Discrete points let you model complex shapes such as fractal surfaces, digitized or scanned data, and fluid flow.
- Use TSurface3D or the sweep classes to represent common quadratic shapes such as cones and cylinders where the contour is defined by smoothly curved surfaces. Smoothly curved surfaces let you model things like cones, cylinders, and spheres.
The sweep classes are described in Chapter 15. They let you represent everything you can represent with a TSurface3D without your needing to understand NURB curves.
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