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Method and apparatus for mapping surface texture

  • US 5,333,245 A
  • Filed: 12/10/1993
  • Issued: 07/26/1994
  • Est. Priority Date: 09/07/1990
  • Status: Expired due to Fees
First Claim
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1. A method for adding surface texture to a computer generated two-dimensional image of a three-dimensional object comprising the steps of:

  • (a) generating said two-dimensional image of said three-dimensional object on a first computer screen,(b) defining a region with bounding polylines on said two-dimensional image of said object,(c) generating a two-dimensional image of said surface texture on a second computer screen,(d) defining first and second non-contiguous polygonal areas with bounding polylines of said two-dimensional image of said surface texture,(e) defining first and second polygonal areas with bounding polylines within said defined region corresponding to said first and second polygonal areas defined in step (d),(f) computing a mathematical model of said defined region by;

    (i) calculating initial mappings between vertices of the first and second polygonal areas defined in step (d) and corresponding vertices of the respective first and second polygonal areas defined in step (e);

    (ii) calculating a mapping function for each of a plurality of sample points within said defined region by interpolating said initial mappings;

    (iii) smoothing the mapping function for each of said plurality of sample points by integrating the corresponding mapping functions of a plurality of neighboring sample points;

    (g) mapping said surface texture onto said defined region in accordance with said mathematical model, and(h) generating a textured image of said defined region on said first computer screen.

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