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Customized Object Hierarchies


Haber,  Jörg
Computer Graphics, MPI for Informatics, Max Planck Society;

Stamminger,  Marc
Computer Graphics, MPI for Informatics, Max Planck Society;

Seidel,  Hans-Peter
Computer Graphics, MPI for Informatics, Max Planck Society;

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Haber, J., Stamminger, M., & Seidel, H.-P. (2000). Customized Object Hierarchies. In B. Girod, G. Greiner, H. Niemann, & H.-P. Seidel (Eds.), {Proceedings of Vision, Modeling, and Visualization (VMV-00)} (pp. 255-262). Berlin, Germany: Akademische Verlagsgesellschaft Aka.

Object hierarchies are useful for different rendering applications. In hierarchical radiosity, for instance, the quality of lighting simulations can be improved through well-adapted object hierarchies. Using a different criterion for constructing the hierarchies may lead to significant speed-ups for typical ray tracing applications. In this paper we introduce a new method for automatically creating object hierarchies. Our algorithm inserts all scene objects sequentially into the hierarchy created so far. The insertion decision is based on a user-defined cost function. Thus the algorithm can be guided to create customized object hierarchies appropriate to the desired application. In addition, a global optimization may be used to improve the completed hierarchy even further. During this optimization step ill-formed groups are eliminated by breaking up or splitting. The results obtained with our method demonstrate the benefit of customized hierarchies over traditional ones.