| Autor: |
Philip Dutré, Leonidas J. Guibas, Markus Gross, Mark Pauly, Richard Keiser, Bart Adams |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
Computer Graphics Forum. 24:677-684 |
| ISSN: |
0167-7055 |
| DOI: |
10.1111/j.1467-8659.2005.00892.x |
| Popis: |
We present efficient data structures and caching schemes to accelerate ray-surface intersections for deforming point-sampled surfaces. By exploiting spatial and temporal coherence of the deformation during the animation, we are able to improve rendering performance by a factor of two to three compared to existing techniques. Starting from a tight bounding sphere hierarchy for the undeformed object, we use a lazy updating scheme to adapt the hierarchy to the deformed surface in each animation step. In addition, we achieve a significant speedup for ray-surface intersections by caching per-ray intersection points. We also present a technique for rendering sharp edges and corners in point-sampled models by introducing a novel surface clipping algorithm. © The Eurographics Association and Blackwell Publishing 2005. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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