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Method and apparatus for adaptive nonlinear projective rendering

  • US 5,905,500 A
  • Filed: 03/18/1997
  • Issued: 05/18/1999
  • Est. Priority Date: 02/19/1997
  • Status: Expired due to Term
First Claim
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1. A method of mapping a graphical surface model, comprising a plurality of model values, onto a polygon of a perspective projection of a polygon-based, graphically-represented object defined by points within an object coordinate system, the method comprising the steps of:

  • a) subdividing the polygon into subpolygons each having a plurality of sides and a plurality of vertices, the subdivision being such that, given exact model values to be assigned to the vertices, the determination of model values by linear interpolation over the length of any one subpolygon side does not produce an interpolation error which exceeds a predetermined threshold value;

    b) determining the exact model values for the vertices of the sub-polygons; and

    c) determining the model values corresponding to the non-vertex object points by interpolation.

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