“Object-space point blending and splatting” by Pajarola, Sainz and Guidotti

  • ©Renato Pajarola, Miguel Sainz, and Patrick Guidotti




    Object-space point blending and splatting



    We present a novel point-based rendering approach based on object-space point interpolation. We introduce the concept of a transformation-invariant covariance matrix of a set of points to efficiently determine splat sizes in a multiresolution hierarchy. We analyze continuous point interpolation in object-space, and define a new class of parametrized blending kernels to achieve smooth blending. Furthermore, we present a hardware accelerated rendering algorithm based on α-texture mapping and α-blending.


    1. M. Botsch, A. Wiratanaya, and L. Kobbelt. Efficient high quality rendering of point sampled geometry. In Proceedings Eurographics Workshop on Rendering, pages -, 2002.
    2. M. Gross. Are points the better graphics primitives? Computer Graphics Forum 20(3), 2001. Plenary Talk Eurographics 2001.
    3. L. Ren, H. Pfister, and M. Zwicker. Object space EWA surface splatting: A hardware accelerated approach to high quality point rendering. In Proceedings EUROGRAPHICS 2002, pages -, 2002. also in Computer Graphics Forum 21(3).
    4. S. Rusinkiewicz and M. Levoy. Qsplat: A multiresolution point rendering system for large meshes. In Proceedings SIGGRAPH 2000, pages 343–352. ACM SIGGRAPH, 2000.
    5. M. Zwicker, H. Pfister, J. van Baar, and M. Gross. Surface splatting. In Proceedings SIGGRAPH 2001, pages 371–378. ACM SIGGRAPH, 2001.

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