[Csgl-users] problem with CsGL tesselation

[Derrick H. <dho...@pr...>]

I'm currently working on a project which uses C# and CsGL for
visualizations.  I have a cluster of points that are to be used to
create a polygonal surface.  This surface may have holes in it, so I am
trying to use the gluTesselation objects.  I am having a problem getting
the tesselator to do anything at all.  Here is my code so far:

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/******************************************************************/

GLUtesselator t =3D gluNewTess();

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GL.gluTessCallback(t,GL.GLU_TESS_BEGIN,

     new GLUtessBeginProc(BeginCB));

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GL.gluTessCallback(t,GL.GLU_TESS_VERTEX_DATA,

     new GLUtessVertexDataProc(VertexCB));

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GL.gluTessCallback(t, GL.GLU_TESS_END,

     new GLUtessEndProc(EndCB));

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GL.gluTessCallback(t,GL.GLU_TESS_ERROR,

     new GLUtessErrorProc(Error));

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GL.gluBeginPolygon(t);

GL.gluTessBeginContour(t);

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foreach(Point3 P in this.m_points)

//A list of 3D points with x,y,z values

{

    double[] point =3D {P.GetX(),P.GetY()};//Get the x and y vals

    GL.gluTessVertex(t,point,(IntPtr)0);

}

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GL.gluTessEndContour(t);

GL.gluEndPolygon(t);

GL.gluDeleteTess(t);

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/********************************************************************/

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The call backs do nothing.  The only one with code at this point is the
error callback.

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When the code calls the gluTessBeginContour call, the error callback
function is called.

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The error code passed in is 100154.

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If anyone can give some help it would be greatly appreciated.

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Derrick Hoffman

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