MULTI-LEVEL GRID STRATEGIES FOR RAY TRACING - Improving Render Time Performance for Row Displacement Compressed Grids

Vasco Costa, João Madeiras Pereira

Abstract

Grids have some of the lowest ray tracing acceleration structure build times. This is because acceleration structure construction is analogous to a sorting algorithm. The ideal behavior for a sorting algorithm is to have O(N) time complexity regarding the number of elements. Grids also have O(N) construction time complexity regarding the number of primitives unlike other commonly used acceleration structures, such as kd-trees or bounding volume hierarchies, which have an O(N logN) lower bound. This trait makes grid ray tracing interesting for many applications including animation. Recent algorithmic developments have also made it possible to achieve one-level grid construction, with low memory requirements, by compressing empty grid cells. Unfortunately one-level grids achieve lower render time performance than recursive structures such as multi-level grids. We present a method for rapidly building a grid with similarly good render time performance and using less memory than classic multi-level grids. We demonstrate that this method is a remarkably effective solution for interactive ray tracing of large scanned models.

References

  1. Amanatides, J. and Woo, A. (1987). A fast voxel traversal algorithm for ray tracing. In Eurographics 7887, pages 3-10.
  2. Cleary, J. and Wyvill, G. (1988). Analysis of an algorithm for fast ray tracing using uniform space subdivision. The Visual Computer, 4(2):65-83.
  3. Cohen, D. and Sheffer, Z. (1994). Proximity clouds - an acceleration technique for 3D grid traversal. The Visual Computer, 11(1):27-38.
  4. Devillers, O. (1989). The macro-regions: an efficient space subdivision structure for ray tracing. In Eurographics 7889, pages 27-38.
  5. Fujimoto, A., Tanaka, T., and Iwata, K. (1986). Arts: Accelerated ray-tracing system. Computer Graphics and Applications, IEEE, 6(4):16-26.
  6. Havran, V., Sixta, F., and Databases, S. (1999). Comparison of hierarchical grids. Ray Tracing News, 12(1):1-4.
  7. Ize, T., Shirley, P., and Parker, S. (2007). Grid creation strategies for efficient ray tracing. In Interactive Ray Tracing, 2007. RT'07. IEEE Symposium on, pages 27- 32.
  8. Jevans, D. and Wyvill, B. (1989). Adaptive voxel subdivision for ray tracing. In Graphics Interface 7889, pages 164-172.
  9. Kalojanov, J. and Slusallek, P. (2009). A parallel algorithm for construction of uniform grids. In Proceedings of the 1st ACM conference on High Performance Graphics, pages 23-28. ACM.
  10. Kim, T., Moon, B., Kim, D., and Yoon, S. (2009). RACBVHs: random-accessible compressed bounding volume hierarchies. In SIGGRAPH 2009: Talks, page 46. ACM.
  11. Lagae, A. and Dutré, P. (2008). Compact, fast and robust grids for ray tracing. Computer Graphics Forum (Proceedings of the 19th Eurographics Symposium on Rendering), 27(8).
  12. Möller, T. and Trumbore, B. (2005). Fast, minimum storage ray/triangle intersection. In International Conference on Computer Graphics and Interactive Techniques. ACM Press New York, NY, USA.
  13. Shevtsov, M., Soupikov, A., and Kapustin, A. (2007). Highly parallel fast kd-tree construction for interactive ray tracing of dynamic scenes. In Computer Graphics Forum, volume 26, pages 395-404. Citeseer.
  14. Wald, I., Ize, T., Kensler, A., Knoll, A., and Parker, S. (2006). Ray tracing animated scenes using coherent grid traversal. In International Conference on Computer Graphics and Interactive Techniques, pages 485-493. ACM Press New York, NY, USA.
  15. Woo, A. (1992). Ray tracing polygons using spatial subdivision. In Proceedings of the conference on Graphics interface 7892, pages 184-191, San Francisco, CA, USA. Morgan Kaufmann Publishers Inc.
Download


Paper Citation


in Harvard Style

Costa V. and Madeiras Pereira J. (2010). MULTI-LEVEL GRID STRATEGIES FOR RAY TRACING - Improving Render Time Performance for Row Displacement Compressed Grids . In Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010) ISBN 978-989-674-026-9, pages 219-224. DOI: 10.5220/0002815302190224


in Bibtex Style

@conference{grapp10,
author={Vasco Costa and João Madeiras Pereira},
title={MULTI-LEVEL GRID STRATEGIES FOR RAY TRACING - Improving Render Time Performance for Row Displacement Compressed Grids},
booktitle={Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010)},
year={2010},
pages={219-224},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002815302190224},
isbn={978-989-674-026-9},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2010)
TI - MULTI-LEVEL GRID STRATEGIES FOR RAY TRACING - Improving Render Time Performance for Row Displacement Compressed Grids
SN - 978-989-674-026-9
AU - Costa V.
AU - Madeiras Pereira J.
PY - 2010
SP - 219
EP - 224
DO - 10.5220/0002815302190224