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The lowest level of geometry recognized by the rendering library, for example, a sphere, polygon mesh, or bi-cubic patch. Geometric primitives or primitives are defined through the rendering library interface and stored internally in implicit form. The facets of primitives are generated internally by the rendering library when required. The rendering library provides a creation function for each primitive type, that returns a handle of type
LiHandle. The application may refer to the primitive with this handle in subsequent operations.
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