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Plane shape creation system, plane shape creation method and program recording medium

  • US 7,782,322 B2
  • Filed: 05/19/2003
  • Issued: 08/24/2010
  • Est. Priority Date: 05/19/2003
  • Status: Expired due to Fees
First Claim
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1. A method for generating/displaying a plane shape, comprising the steps of:

  • setting a normal line, which is equivalent to a tangent plane of a curved surface of an object shape, at each vertex of a triangle shape plane patch which is a basic form necessary for generating/displaying the object shape,decomposing, in a specific direction, said set normal line on a tangent plane at said each vertex of the triangle shape plane patch, thus setting a tangent line;

    forming, between two corresponding vertexes of said triangle shape plane patch and in a direction based on said two corresponding vertexes, an equivalent normal line that becomes a new tangent plane of the object shape;

    determining another tangent line at where said normal line is formed; and

    further determining a normal line equivalent to the tangent plane of the curved surface,thus creating the object shape; and

    displaying the object shape on a display.

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