Hansong's Research and Publications

Hierarchical Occlusion Maps/Occlusion culling Forward Shadow Mapping for real-time shadow generation Backface culling/Normal masks Realtime Relativity Cache coherence/Pixel traversal/parallel volume raytracing Hybrid raytracinggeometry/volume data Pattern generation


* Forward Shadow Mapping
* Visibility Culling with Hierarchical Occlusion Maps (Ph. D. dissertation)
* Backface Culling Using Normal Masks
* Real-time Relativity
* Parallel Volume Ray-tracing and Data Coherence
* Raytracing Hybrid Volume Data and Geometry
* Pattern Generation


* A Derivation of Image-Based Rendering for Conventional 3-D Graphics, Hansong Zhang, Journal of Graphics Tools, Journal of Graphics Tools, 4(2):27-36, 1999.
* Effective Occlusion Culling for the Interactive Display of Arbitrary Models, Hansong Zhang, Ph. D. Dissertation , Department of Computer Science, UNC-Chapel Hill, 1998 (Postscript; PDF)
* Forward Shadow Mapping, Hansong Zhang, Rendering Techniques '98, Proceedings of the 9th EuroGraphics Rendering Workshop, Vienna, Austria, June 29-July 1, 1998, Drettakis, G., Max, N. (eds.) ISBN 3-211-83213-0 (Postscript). Figures (TIFF): 2 4a 2 4b 5a 6
* Visibility Culling Using Hierarchical Occlusion Map, Hansong Zhang, Dinesh Manocha, Tom Hudson and Kenny Hoff, Proceedings of SIGGRAPH 1997. You're strongly encouraged to read my dissesrtation instead of this paper. (Postscript)
* Fast Backface Culling Using Normal Mask, Hansong Zhang and Kenny Hoff, Symposium on Interactive 3D Graphics, 1997 (Postscript, PDF, source code nmask.h, nmask.C, encode.C)
* Efficient Radiosity Rendering using Textures and Bicubic Reconstruction, R. Bastos, M. Goslin and Hansong Zhang, Symposium on Interactive 3D Graphics, ACM SIGGRAPH, 1997 (Postscript)
* Accelerated Walkthrough of Large Spline Models, Subodh Kumar, Dinesh Manocha, Hansong Zhang and Kenneth E. Hoff III. Symposium on Interactive 3D Graphics, 1997. (Postscript, Color Plates 1, 2, 3, 4, 5)
* Pattern Generation with Color Map Gouraud Shading, Hansong Zhang, Computer & Graphics, No.1/Vol.20, Elsevier Science Ltd, Jan. 1996 (Color plates)
* Order of Pixel Traversal and Parallel Volume Ray-tracing on the Distributed Shared Volume Buffer, Hansong Zhang and Shenqian Liu, Eurographics Workshop on Visualization 1995, Springer Verlag, Wien, Austria, 1995 (Postscript, Color plates 1,2)

Technical Reports

* An Traditionalist View of 3-D Image Warping, Hansong Zhang, 9/11/97, (Postscript) Replaced by A Derivation of Image-Based Rendering for Conventional 3-D Graphics; see Publications above.
* Fast Transformation of Axis-Aligned Bounding Boxes, Hansong Zhang, 9/17/97. (Postscript, PDF)

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