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Binary Space Partitioning for Previewing UNIGRAFIX Scenes

Gigus, Ziv
Technical Report Identifier: CSD-86-280
December 1985

Abstract: The binary space partition algorithm by Fuchs et al. has been implemented for interactive display of scenes described in the UNIGRAFIX language. The scene is displayed using the painter's algorithm on a device that draws only convex polygons, thus an algorithm for decomposing concave polygons into convex pieces has also been implemented.

The program provides fast, near real time interaction for modifying the viewing parameters. The user can move through the scene, examine its content and the relation between the objects in the scene. In this way, one can easily pick the "best" viewing parameters for rendering the scene on hard copy devices, using the relatively slow scan-line based renderers provided by the UNIGRAFIX system.