| Hierarchical surface fragments |
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| 作者姓名： | HUA Wei BAO Hujun PENG Qunsheng |
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| 作者单位： | State Key Laboratory of CAD & CG, Zhejiang University, Hangzhou 310027, China,State Key Laboratory of CAD & CG, Zhejiang University, Hangzhou 310027, China,State Key Laboratory of CAD & CG, Zhejiang University, Hangzhou 310027, China |
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| 基金项目： | Supported by the National Natural Science Funds for Distinguished Young Scholars (No. 69925204) and for Creative Research Groups (No. 60021201) and National 863 High_Tech Program (2001AA135040) |
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| 摘 要： | A new compact level-of-detail representation, called hierarchical surface fragments, for geometric objects with highly complex shape is presented. The representation comprises a set of irregular unstructured sampled surface fragments, whose boundary is a circle viewed along its normal. An efficient algorithm to construct the representation is described. In depiction of the framework for visualization, a screen tile technique for acceleration of rendering is proposed. Since an approximate z-buffer algorithm is adopted to fast determine visibility of each rendering primitive, a new buffer, z-delta-buffer, is designed to facilitate solving the problems raised by the approximation and to improve the image fidelity. Finally, a solution is provided to integrate our rendering approach for hierarchical surface fragments with traditional polygon-based methods.
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| 关 键 词： | rendering systems level of detail antialiasing image-based rendering |
Hierarchical surface fragments |
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| HUA Wei,BAO Hujun,PENG Qunsheng.Hierarchical surface fragments[J].Progress in Natural Science,2002,12(9):701-709. |
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| Authors: | HUA Wei BAO Hujun Peng Qunsheng |
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| Institution: | State Key Laboratory of CAD & CG, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | A new compact level-of-detail representation, called hierarchical surface fragments, for geometric objects with highly complex shape is presented. The representation comprises a set of irregular unstructured sampled surface fragments, whose boundary is a circle viewed along its normal. An efficient algorithm to construct the representation is described. In depiction of the framework for visualization, a screen tile technique for acceleration of rendering is proposed. Since an approximate z-buffer algorithm is adopted to fast determine visibility of each rendering primitive, a new buffer, z-delta-buffer, is designed to facilitate solving the problems raised by the approximation and to improve the image fidelity. Finally, a solution is provided to integrate our rendering approach for hierarchical surface fragments with traditional polygon-based methods. |
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| Keywords: | rendering systems level of detail antialiasing image-based rendering |
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