Xianyou Hou, Li-Yi Wei, Harry Shum, and Baining Guo
EUROGRAPHICS Symposium on Rendering, 2006.
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Curved reflection of nearby objects is a classic example of multi-perspective rendering. Our multi-perspective framework renders more accurate reflection than a traditional environment map, which is single-perspective. All reported frame-rates are measured on a NVIDIA Geforce-7800-GT chip. |
Multi-perspective rendering has a variety of applications; examples include lens refraction, curved mirror reflection, caustics, as well depiction and visualization. However, multi-perspective rendering is not yet practical on polygonal graphics hardware, which so far has utilized mostly single-perspective (pin-hole or orthographic) projections.In this paper, we present a methodology for real-time multi-perspective rendering on polygonal graphics hardware. Our approach approximates a general multi-perspective projection surface (such as a curved mirror and lens) via a piecewise-linear triangle mesh, upon which each triangle is a simple multi-perspective camera, parameterized by three projection directions at triangle vertices. We derive analytic formula showing that each triangle projection can be implemented as a pair of vertex and fragment programs on programmable graphics hardware. We demonstrate real-time performance of a variety of applications enabled by our technique, including reflection, refraction, caustics, and visualization.
