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The Design of a 3D Rendering Meta System

This paper describes the design of a 3D rendering meta system which wraps the functionality of 3D rendering packages into a uniform, object-oriented framework. The homogeneous interface of the 3D rendering meta system serves as an easy-to-learn application programming interface to 3D rendering packages and allows us to exchange rendering packages without the need to recode an application. Our approach is based on a logical decomposition of the elements of 3D rendering into four major class categories: Shapes define geometric objects; attributes specify quality and visual appearance; controllers describe rendering techniques and rendering processes, and rendering engines evaluate shapes, attributes, and controllers. We have implemented our concepts in VRS, the Virtual Rendering System, as a portable C++ toolkit. VRS currently supports rendering packages such as OpenGL, PEX, XGL, Radiance, POV Ray, and RenderMan.