Sample-based Cameras for Fast Accurate Reflections

This paper presents sample-based cameras for rendering accurate reflections on curved reflectors at interactive rates. 'The method supports change of view, moving objects and reflectors, higher order reflections, view-dependent lighting of reflected objects, and reflector surface properties. In order to render reflections with the feed forward graphics pipeline, one has to compute the image points where a reflected scene point projects. A sample-based camera is a collection of BSP trees of pinhole cameras that jointly approxinlate the projection function. It is constructed from the reflected rays defined by the desired view and the scene reflectors. A scene point is projected by invoking the cameras that contain it in their frustums. Reflections are rendered by projecting the scene geometry then rasterizing in hardware.