int DPlot_3DBorder(int Docnum, int NumPoints, double *Border);
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Remarks
This function may be used only on surface plots of randomly-spaced 3D points (DATA_3DR). The border may start at any location and then proceed in either a clockwise or counterclockwise direction. The border may cross over itself. Triangles for which the center point is outside the border will be removed (Note that this means that the resulting plot may have triangles that cross the border; triangles are not clipped by the border.) The border cannot be added to using this function; any existing border, set either with a call to this function or via the Define Boundary menu command, will be removed. For a description of creating holes in a surface see the DPlot Help file topic on the Define Boundary menu command. For example usage see the C ctest, VB btest, or Watcom FORTRAN ftest demo programs.
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