三维虚拟场景编辑系统研究与实现
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摘要
在三维图形领域，主要包括三维场景建模，三维场景Render和三维场景编
辑三方面。特别是在三维场景Render和三维场景编辑方面，实时性、系统性和
交互性还存在很大的不足。
基于上述不足，本文对三维场景的解释、三维场景Render和三维场景交互
操作方面进行了深入的研究，在系统性和交互性方面取得了很大的进步。为了
使交互平滑流畅，提出了在几何空间中进行求交计算方法；为了使系统具有良
好的扩展性，提出了节点注册方法。
本文实现的主要功能：（1）把一个VRML文件解释成系统内部的场景图，即
实现了一个VRML解释器；（2）Render一个场景图；（3）选择并操作场景中的节
点。此系统已成功地应用于各电视台高度评价的虚拟演播室。
In the 3-Dimension Graphics area, there are three important research directions:
3-Dimension Graphics Modeling, 3-Dimension Graphics Rendering and
3-Dimension Scene Graph Editing. Especially in the 3-Dimension Graphics
Rendering and 3-Dimension Graphics Editing fields, there is a lot of inefficiency
about the Real-Time, Systematicness and Interaction.
The dissertation based on the inefficiency above, and devoted to research of the
3-Dimension Graphics Rendering and Interaction, and make great achievements in
Real-Time, Systematicness and Interaction aspects.
The dissertation has accomplished these functionalities: 0 a complier that
interpret the VRML file into the Scene Graph of the Scene Database, ?Rendering
the Scene Graph, ?Select and Operate the Scene Node. And the system has
been applied to the Virtual Studio System that has praised by all the TV Stations
successfully.
辑三方面。特别是在三维场景Render和三维场景编辑方面，实时性、系统性和
交互性还存在很大的不足。
基于上述不足，本文对三维场景的解释、三维场景Render和三维场景交互
操作方面进行了深入的研究，在系统性和交互性方面取得了很大的进步。为了
使交互平滑流畅，提出了在几何空间中进行求交计算方法；为了使系统具有良
好的扩展性，提出了节点注册方法。
本文实现的主要功能：（1）把一个VRML文件解释成系统内部的场景图，即
实现了一个VRML解释器；（2）Render一个场景图；（3）选择并操作场景中的节
点。此系统已成功地应用于各电视台高度评价的虚拟演播室。
In the 3-Dimension Graphics area, there are three important research directions:
3-Dimension Graphics Modeling, 3-Dimension Graphics Rendering and
3-Dimension Scene Graph Editing. Especially in the 3-Dimension Graphics
Rendering and 3-Dimension Graphics Editing fields, there is a lot of inefficiency
about the Real-Time, Systematicness and Interaction.
The dissertation based on the inefficiency above, and devoted to research of the
3-Dimension Graphics Rendering and Interaction, and make great achievements in
Real-Time, Systematicness and Interaction aspects.
The dissertation has accomplished these functionalities: 0 a complier that
interpret the VRML file into the Scene Graph of the Scene Database, ?Rendering
the Scene Graph, ?Select and Operate the Scene Node. And the system has
been applied to the Virtual Studio System that has praised by all the TV Stations
successfully.
引文
[1] M.Levoy, Display of surfaces form volume data, IEEE Cpmputer Graphics and Applications 8(3) 29-37(May 1998) .
[2] J.F. Blinn, Light reflection functions for simulation of clouds and dusty surfaces, ACM Computer Graphics, SIGGRAPH-84,16(3) 21-29 (1982) .
[3] J.T. Kajiya and B. von Herzen, Ray tracing volume densities, ACM Computer Graphics, SIGGEAPH-84 18(3) 165-174 (July 1985) .
[4] N.L. Max, Atmospheric illumination and shadows, ACM Computer Graphics, SIGGRAPH-86 20(4) 117-124 (August 1986) .
[5] V.Klassen,Modeling the effect of the atmosphere on light, ACM Transactions on Graphics 6(3) 215-237 (July 1987) .
[6] D.Ebert and R.Parent, Rendering and animation of gaseous phenomena by combing fast volume and scanline A-buffer techniques, ACM Computer Graphics, SIGGRAPH-90 24(4) 357-367 (August 1990) .
[7] M.Levoy, Efficient ray-tracing of volume data, ACM Transactions on Graphics 9(3) (July 1990) .
[8] P.Heckbert, Survey of texture mapping, IEEE Computer Graphics and Applications 7-19(1986) .
[9] L.Westover, Footprint evaluation for volume rendering, ACM Computer Graphics, SIGGRAPH-90 24(4) 367-376 (August 1990) .
[10] D.R. Peachy, Antialiasling solid textures, M.Inagkage(Ed.), ACM SIGGRAPH-88 "Functional Based Motioning" Course Notes, 28 13-35 (August 1998) .
[11] H.Shawney and J.Hafner, "Efficient Color Histogram Indexing," Proc. Int' 1Conf. On Image Processing, IEEE Press, Piscataway, N.J., 1994, pp.67-70
[12] R.Methrotra and J.E.Gray, "Featrue-Index-Based Similar Shape Retrieval," Proc 3rd Working Conf. On Visual Database Systems, Chapman and Hall, London, 1995, pp.46-65
[13] E.Schikuta, "Grid Clustering: An efficient Hierarchical Clustering Method for Very Large Data Sets," Proc. 13th Conf.on Pattern Recognition, Vol.2, IEEE CS Press, Los Alamitos, Calif., pp.101-105
[14] M.R. Falvo et al., "Bending and Buckling of Carbon Nanotubes under Large Strain," Nature, Vol.389, Oct: 1997, pp.582-584
[15] I.Poupyrev et al, "The Go-Go Interaction Technique: Non-linear Mapping for Direct Manipulation in VR," Proc. ACM symp. On User Interface Software and Technology, ACM Press, New York, 1996, pp.79-80
[16] AKELEY, K. and T. JERMOLUK "High-Performance Polygon Rendering", in Proceedings of SIGGRAPH' 88, Comuter Graphics, 22(4) , pp.239-246．
[17] BARR, A.H. "Ray Tracing Deformed Surfaces", in proceedings of SIGGRAPH'86m Computer Graphics, 20(4) , pp.287-296
[18] OpenGL Programming Guide
[2] J.F. Blinn, Light reflection functions for simulation of clouds and dusty surfaces, ACM Computer Graphics, SIGGRAPH-84,16(3) 21-29 (1982) .
[3] J.T. Kajiya and B. von Herzen, Ray tracing volume densities, ACM Computer Graphics, SIGGEAPH-84 18(3) 165-174 (July 1985) .
[4] N.L. Max, Atmospheric illumination and shadows, ACM Computer Graphics, SIGGRAPH-86 20(4) 117-124 (August 1986) .
[5] V.Klassen,Modeling the effect of the atmosphere on light, ACM Transactions on Graphics 6(3) 215-237 (July 1987) .
[6] D.Ebert and R.Parent, Rendering and animation of gaseous phenomena by combing fast volume and scanline A-buffer techniques, ACM Computer Graphics, SIGGRAPH-90 24(4) 357-367 (August 1990) .
[7] M.Levoy, Efficient ray-tracing of volume data, ACM Transactions on Graphics 9(3) (July 1990) .
[8] P.Heckbert, Survey of texture mapping, IEEE Computer Graphics and Applications 7-19(1986) .
[9] L.Westover, Footprint evaluation for volume rendering, ACM Computer Graphics, SIGGRAPH-90 24(4) 367-376 (August 1990) .
[10] D.R. Peachy, Antialiasling solid textures, M.Inagkage(Ed.), ACM SIGGRAPH-88 "Functional Based Motioning" Course Notes, 28 13-35 (August 1998) .
[11] H.Shawney and J.Hafner, "Efficient Color Histogram Indexing," Proc. Int' 1Conf. On Image Processing, IEEE Press, Piscataway, N.J., 1994, pp.67-70
[12] R.Methrotra and J.E.Gray, "Featrue-Index-Based Similar Shape Retrieval," Proc 3rd Working Conf. On Visual Database Systems, Chapman and Hall, London, 1995, pp.46-65
[13] E.Schikuta, "Grid Clustering: An efficient Hierarchical Clustering Method for Very Large Data Sets," Proc. 13th Conf.on Pattern Recognition, Vol.2, IEEE CS Press, Los Alamitos, Calif., pp.101-105
[14] M.R. Falvo et al., "Bending and Buckling of Carbon Nanotubes under Large Strain," Nature, Vol.389, Oct: 1997, pp.582-584
[15] I.Poupyrev et al, "The Go-Go Interaction Technique: Non-linear Mapping for Direct Manipulation in VR," Proc. ACM symp. On User Interface Software and Technology, ACM Press, New York, 1996, pp.79-80
[16] AKELEY, K. and T. JERMOLUK "High-Performance Polygon Rendering", in Proceedings of SIGGRAPH' 88, Comuter Graphics, 22(4) , pp.239-246．
[17] BARR, A.H. "Ray Tracing Deformed Surfaces", in proceedings of SIGGRAPH'86m Computer Graphics, 20(4) , pp.287-296
[18] OpenGL Programming Guide
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