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by Matthias Zwicker, Jussi Räsänen
http://www-i8.informatik.rwth-aachen.de/publications/./../publications/downloads/perspective_accurate_splatting.pdf
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Abstract:
We present a novel algorithm for accurate, high quality point rendering, which is based on the formulation of splatting using homogeneous coordinates. In contrast to previous methods, this leads to perspective correct splat shapes, avoiding artifacts such as holes caused by the affine approximation of the perspective projection. Further, our algorithm implements the EWA resampling filter, hence providing high image quality with anisotropic texture filtering. We also present an extension of our rendering primitive that facilitates the display of sharp edges and corners. Finally, we describe an efficient implementation of the entire point rendering pipeline using vertex and fragment programs of current GPUs. Key words: point rendering, conic sections and projective mappings, texture filtering, graphics hardware 1
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