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Method and system for inversion of detail-in-context presentations with folding

  • US 20030231177A1
  • Filed: 05/12/2003
  • Published: 12/18/2003
  • Est. Priority Date: 05/17/2002
  • Status: Active Grant
First Claim
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1. A method for inverting a distorted surface presentation into an undistorted surface presentation in a detail-in-context presentation system comprising the steps of:

  • a) selecting an input point {overscore (p)}input on said undistorted surface;

    b) calculating a vector {overscore (ν

    )} from said input point {overscore (p)}input to a reference viewpoint v{overscore (r)}p;

    c) locating a starting point {overscore (p)}i+1, said starting point {overscore (p)}i+1 lying above said distorted surface and on said vector {overscore (ν

    )};

    d) locating a first bracketing {overscore (p)}i for a first intersection point of said vector {overscore (ν

    )} and said distorted surface, said first bracketing point {overscore (p)}i lying above said distorted surface and on said vector {overscore (ν

    )};

    e) locating a second bracketing point {overscore (p)}i+1 for said first intersection point, said second bracketing point {overscore (p)}i+1 lying below said distorted surface, and below said first intersection point, but above any subsequent intersection points of said vector {overscore (ν

    )} and said distorted surface;

    f) locating a midpoint {overscore (p)}mid between said first and second bracketing points {overscore (p)}i, {overscore (p)}i+1; and

    , g) determining if said midpoint {overscore (p)}mid is an acceptable approximation for said first intersection point, said acceptable approximation being an inversion point corresponding to said input point {overscore (p)}input.

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