Towards interactive bump mapping with anisotropic shift-variant BRDFs

ABSTRACT

In this paper a technique is presented that combines interactive hardware accelerated bump mapping with shift-variant anisotropic reflectance models. An evolutionary path is shown how some simpler reflectance models can be rendered at interactive rates on current low-end graphics hardware, and how features from future graphics hardware can be exploited for more complex models. We show how our method can be applied to some well known reflectance models, namely the Banks model, Ward's model, and an anisotropic version of the Blinn-Phong model, but it is not limited to these models. Furthermore, we take a close look at the necessary capabilities of the graphics hardware, identifiy problems with current hardware, and discuss possible enhancements.

REFERENCES

• 1: David C. Banks, Illumination in diverse codimensions, Proceedings of the 21st annual conference on Computer graphics and interactive techniques, p.327-334, July 1994 [doi>10.1145/192161.192246]
• 2: James F. Blinn, Simulation of wrinkled surfaces, Proceedings of the 5th annual conference on Computer graphics and interactive techniques, p.286-292, August 23-25, 1978
• 3: James F. Blinn, Models of light reflection for computer synthesized pictures, Proceedings of the 4th annual conference on Computer graphics and interactive techniques, p.192-198, July 20-22, 1977, San Jose, California
• 4: Robert L. Cook , Kenneth E. Torrance, A reflectance model for computer graphics, Proceedings of the 8th annual conference on Computer graphics and interactive techniques, p.307-316, August 03-07, 1981, Dallas, Texas, United States
• 5: I. Ernst , H. Rüsseler , H. Schulz , O. Wittig, Gouraud bump mapping, Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware, p.47-ff., August 31-September 01, 1998, Lisbon, Portugal [doi>10.1145/285305.285311]
• 6: HAEBERLI, P., AND SEGAL, M. Texture Mapping As A Fundamental Drawing Primitive. In Fourth Eurographics Workshop on Rendering (June 1993), Eurographics, pp. 259-266.
• 7: HEIDRICH, W. High-quality Shading and Lighting for Hardware-accelerated Rendering. PhD thesis, Universit at Erlangen-Nurnberg, 1999.
• 8: Wolfgang Heidrich , Hans-Peter Seidel, Realistic, hardware-accelerated shading and lighting, Proceedings of the 26th annual conference on Computer graphics and interactive techniques, p.171-178, July 1999 [doi>10.1145/311535.311554]
• 9: Wolfgang Heidrich , Rüdiger Westermann , Hans-Peter Seidel , Thomas Ertl, Applications of pixel textures in visualization and realistic image synthesis, Proceedings of the 1999 symposium on Interactive 3D graphics, p.127-134, April 26-29, 1999, Atlanta, Georgia, United States [doi>10.1145/300523.300538]
• 10: KAUTZ, J., AND MCCOOL, M. Interactive Rendering with Arbitrary BRDFs using Separable Approximations. In Tenth Eurographics Workshop on Rendering (June 1999), pp. 281- 292.
• 11: KILGARD, M. A Practical and Robust Bump-mapping Technique for Today's GPUs. NVIDIA Corporation, April 2000. Available from http://www.nvidia.com.
• 12: Gordon Kindlmann , David Weinstein, Hue-balls and lit-tensors for direct volume rendering of diffusion tensor fields, Proceedings of the conference on Visualization '99: celebrating ten years, p.183-189, October 1999, San Francisco, California, United States
• 13: Eric P. F. Lafortune , Sing-Choong Foo , Kenneth E. Torrance , Donald P. Greenberg, Non-linear approximation of reflectance functions, Proceedings of the 24th annual conference on Computer graphics and interactive techniques, p.117-126, August 1997 [doi>10.1145/258734.258801]
• 14: Michael D. McCool , Wolfgang Heidrich, Texture shaders, Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware, p.117-126, August 08-09, 1999, Los Angeles, California, United States [doi>10.1145/311534.311585]
• 15: MCREYNOLDS, T., BLYTHE, D., GRANTHAM, B., AND NELSON, S. Advanced Graphics Programming Techniques Using OpenGL. In SIGGRAPH '98 Course Notes (July 1998).
• 16: Gavin Miller , Mark Halstead , Michael Clifton, On-the-Fly Texture Computation for Real-Time Surface Shading, IEEE Computer Graphics and Applications, v.18 n.2, p.44-58, March 1998 [doi>10.1109/38.656789]
• 17: NEIDER, J., DAVIS, T., AND WOO, M. OpenGL - Programming Guide. Addison-Wesley, 1993.
• 18: NVIDIA CORPORATION. NVIDIA OpenGL Extension Specifications, Oct. 1999. Available from http://www.nvidia.com.
• 19: Marc Olano , Anselmo Lastra, A shading language on graphics hardware: the pixelflow shading system, Proceedings of the 25th annual conference on Computer graphics and interactive techniques, p.159-168, July 1998 [doi>10.1145/280814.280857]
• 20: Mark Peercy , John Airey , Brian Cabral, Efficient bump mapping hardware, Proceedings of the 24th annual conference on Computer graphics and interactive techniques, p.303-306, August 1997 [doi>10.1145/258734.258873]
• 21: Bui Tuong Phong, Illumination for computer generated pictures, Communications of the ACM, v.18 n.6, p.311-317, June 1975 [doi>10.1145/360825.360839]
• 22: SEGAL, M., AND AKELEY, K. The OpenGL Graphics System: A Specification (Version 1.2.1), 1999.
• 23: SILICON GRAPHICS INC. Pixel Texture Extension, Dec. 1996. Specification document, available from http://www.opengl.org.
• 24: SILICON GRAPHICS INC. Multitexture Extension, Sept. 1997. Specification document, available from http://www.opengl.org.
• 25: TORRANCE, K., AND SPARROW, E. Theory for Off-Specular Reflection From Roughened Surfaces. Journal of the Optical Society of America 57, 9 (Sept. 1967), 1105-1114.
• 26: Douglas Voorhies , Jim Foran, Reflection vector shading hardware, Proceedings of the 21st annual conference on Computer graphics and interactive techniques, p.163-166, July 1994 [doi>10.1145/192161.192193]
• 27: Gregory J. Ward, Measuring and modeling anisotropic reflection, Proceedings of the 19th annual conference on Computer graphics and interactive techniques, p.265-272, July 1992
• 28: Rüdiger Westermann , Thomas Ertl, Efficiently using graphics hardware in volume rendering applications, Proceedings of the 25th annual conference on Computer graphics and interactive techniques, p.169-177, July 1998 [doi>10.1145/280814.280860]

INDEX TERMS

Primary Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.1 Hardware architecture
          Subjects: Graphics processors

Additional Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.3 Picture/Image Generation
          Subjects: Bitmap and framebuffer operations
      I.3.7 Three-Dimensional Graphics and Realism
          Subjects: Color, shading, shadowing, and texture

General Terms:
Design, Performance, Theory