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Constructive shell representations for freeform surfaces and solids

Published: 01 March 1994 Publication History

Abstract

We usually model freeform surfaces (mathematically, 2D r-sets embedded in 3D Euclidean space E/sup 3/) as a finite union of patches represented in the traditional parametric or the recently developed algebraic forms. The article introduces a new representation scheme for freeform surfaces called constructive shell representation (CSR), that draws on recent research on algebraic patches. CSRs of surfaces that constitute boundaries of solids are very useful for solid modeling. They represent thick shells derived from freeform surfaces and provide a means to compute exact CSG representations of freeform solids.

References

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1. T.W. Sederberg, "Techniques for Cubic Algebraic Surfaces: Tutorial Part Two," IEEE CG&A, Vol. 10, No. 5, Sept. 1990, pp. 12-21.
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2. T.W. Sederberg, "Piecewise Algebraic Surface Patches," Computer Aided Geometric Design, Vol. 2, 1985, pp. 53-59.
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3. B. Guo, "Modeling Arbitrary Smooth Objects with Algebraic Surfaces," doctoral dissertation, Dept. Computer Science, Cornell Univ., Ithaca, N.Y., June 1991.
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4. J.L. Ellis et al., "The Ray Casting Engine and Ray Representations: A Technical Summary," Int'l J. Compututional Geometry and Applications , Vol. 1, No. 4, Dec. 1991, pp. 347-380.
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5. V. Shapiro and D.L. Vossler, "Separation for Boundary to CSG Conversion," ACM Trans. on Graphics, Vol. 12, No. 1, Jan. 1993, pp. 35-55.
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6. J.P. Menon, "Constructive Shell Representations for Freeform Surfaces and Solids," doctoral dissertation, Sibley School of Mechanical and Aerospace Eng., Cornell Univ., Ithaca, N.Y., Aug. 1992.
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7. H.B. Voelcker, "New Directions in Solid Modeling?" Proc. Int'l Conf. on Manufacturing Automation, Univ. of Hong Kong, Hong Kong, August 1992, pp. 157-168.
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8. C. Bajaj and I. Ihm, "Smoothing Polyhedra Using Implicit Algebraic Splines," Computer Graphics (Siggraph 92), July 1992, Vol. 26, No. 2, pp. 79-88.
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9. B. Guo, "Nonsplitting Macro Patches for Implicit Cubic Spline Surfaces," Computer Graphics Forum, Vol. 12, No. 3, Sept. 1993, pp. 433-445.
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10. J.P. Menon, R.J. Marisa, and J. Zagajac, "More Powerful Solid Modeling through Ray Representations," IEEE CG&A, Vol. 14, No. 3, May 1994 (to appear).
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11. N.M. Patrikalakis and G.A. Kriezis, "Representations of Piecewise Continuous Algebraic Surfaces in Terms of B-splines," The Visual Computer, Vol. 5, No. 5, Oct. 1989, pp. 360-374.
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12. W. Dahmen and T.-M. Thamm-Schaar, "Cubicoids: Modeling and Visualization," Computer Aided Geometric Design, Vol. 10, 1993, pp. 89-108.

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      cover image IEEE Computer Graphics and Applications
      IEEE Computer Graphics and Applications  Volume 14, Issue 2
      March 1994
      114 pages

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      IEEE Computer Society Press

      Washington, DC, United States

      Publication History

      Published: 01 March 1994

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