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This demonstrates the use of vertex programs for NURBS using a 4x4 NURB.

Nurbs Surface Demo

    This demo uses a vertex program to compute the vertex position for a NURB surface. The example uses

    a 4x4 control mesh to define a NURBS surface.

    The host CPU generates a UV surface with the the u and v basis functions in the vertex position and

    and color. The routine that builds the UV surface is CreateNURBSUVSurface which is called once, NURB

    basis functions are generated in CreateBSpliineBasis which is a recursive routine that computes the

    basis function from n to 1.

    Once the basis functions have been computed and inserted into the UV mesh a the control points are

    loaded to the GPU using glProgramLocalParameter4fvARB(GL_VERTEX_PROGRAM_ARB, ...) then drawn to using

    a glDrawElements command.

    The UV mesh is then evaluated on the GPU using the vertex program NURBSSurface.vsh (in Resources).