//The control points for this surface
float[][] pts = new float[][]
{
    {-4.5f, -2.0f,  8.0f},
    {-2.0f,  1.0f,  8.0f},
    { 2.0f, -3.0f,  6.0f},
    { 5.0f, -1.0f,  8.0f},
    {-3.0f,  3.0f,  4.0f},
    { 0.0f, -1.0f,  4.0f},
    { 1.0f, -1.0f,  4.0f},
    { 3.0f,  2.0f,  4.0f},
    {-5.0f, -2.0f, -2.0f},
    {-2.0f, -4.0f, -2.0f},
    { 2.0f, -1.0f, -2.0f},
    { 5.0f,  0.0f, -2.0f},
    {-4.5f,  2.0f, -6.0f},
    {-2.0f, -4.0f, -5.0f},
    { 2.0f,  3.0f, -5.0f},
    { 4.5f, -2.0f, -6.0f}
};

// The knot vector
float[] knots = new float[]
{
    0, 0, 0, 0, 
    1, 1, 1, 1
};

// Create the nodes needed for the Bezier surface.
SoSeparator
makeSurface()
{
  SoSeparator surfSep = new SoSeparator();

  // Define the Bezier surface including the control
  // points and a complexity.
  SoComplexity complexity = new SoComplexity();
  SoCoordinate3 controlPts = new SoCoordinate3();
  SoNurbsSurface surface = new SoNurbsSurface();
  complexity.value.setValue(0.7f);
  controlPts.point.setValues(0, pts);
  surface.numUControlPoints.setValue(4);
  surface.numVControlPoints.setValue(4);
  surface.uKnotVector.setValues(0, knots);
  surface.vKnotVector.setValues(0, knots);
  surfSep.addChild(complexity);
  surfSep.addChild(controlPts);
  surfSep.addChild(surface);

  return surfSep;
}
                     

//The array of trim coordinates 
float[][] tpts = new float[][]
{
    { 0.0f, 0.0f },
    { 1.0f, 0.0f },
    { 1.0f, 1.0f },
    { 0.0f, 1.0f },
    { 0.2f, 0.2f },
    { 0.2f, 0.7f },
    { 0.9f, 0.7f },
    { 0.9f, 0.2f },
    { 0.7f, 0.0f },
    { 0.4f, 0.8f }
};

// The 16 coordinates defining the Bezier surface. 
float[][] pts = new float[][]
{
    {-4.5f,-2.0f, 8.0f},
    {-2.0f, 1.0f, 8.0f},
    { 2.0f,-3.0f, 6.0f},
    { 5.0f,-1.0f, 8.0f},
    {-3.0f, 3.0f, 4.0f},
    { 0.0f,-1.0f, 4.0f},
    { 1.0f,-1.0f, 4.0f},
    { 3.0f, 2.0f, 4.0f},
    {-5.0f,-2.0f,-2.0f},
    {-2.0f,-4.0f,-2.0f},
    { 2.0f,-1.0f,-2.0f},
    { 5.0f, 0.0f,-2.0f},
    {-4.5f, 2.0f,-6.0f},
    {-2.0f,-4.0f,-5.0f},
    { 2.0f, 3.0f,-5.0f},
    { 4.5f,-2.0f,-6.0f}
};

// The 3 knot vectors for the 3 trim curves.
float[] tknots1 = new float[] { 0.0f, 0.0f, 1.0f, 2.0f, 3.0f, 4.0f, 4.0f };
float[] tknots2 = new float[] { 0.0f, 0.0f, 1.0f, 2.0f, 3.0f, 3.0f };
float[] tknots3 = new float[] { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f };

// The Bezier knot vector for the surface.
// This knot vector is used in both the U and
// V directions.
float[] knots = new float[] { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 1.0f };

// Create the nodes needed for the Bezier patch
// and its trim curves.
SoSeparator MakeSurface()
{
  SoSeparator surfSep = new SoSeparator();

  // Define the Bezier surface including the control
  // points, trim curve, and a complexity.
  SoComplexity complexity = new SoComplexity();
  SoCoordinate3 controlPts = new SoCoordinate3();
  SoNurbsSurface surface = new SoNurbsSurface();
  complexity.value.setValue(0.7f);
  controlPts.point.setValues(0, pts);
  surface.numUControlPoints.setValue(4);
  surface.numVControlPoints.setValue(4);
  surface.uKnotVector.setValues(0, knots);
  surface.vKnotVector.setValues(0, knots);
  surfSep.addChild(complexity);
  surfSep.addChild(controlPts);

  SoProfileCoordinate2 trimPts = new SoProfileCoordinate2();
  SoNurbsProfile nTrim1 = new SoNurbsProfile();
  SoNurbsProfile nTrim2 = new SoNurbsProfile();
  SoNurbsProfile nTrim3 = new SoNurbsProfile();
  int[] trimInds = new int[5];

  trimPts.point.setValues(0, tpts);
  trimInds[0] = 0;
  trimInds[1] = 1;
  trimInds[2] = 2;
  trimInds[3] = 3;
  trimInds[4] = 0;
  nTrim1.index.setValues(0, trimInds);
  nTrim1.knotVector.setValues(0, tknots1);
  trimInds[0] = 4;
  trimInds[1] = 5;
  trimInds[2] = 6;
  trimInds[3] = 7;
  nTrim2.linkage.setValue(SoProfile.Profiles.START_NEW);
  nTrim2.index.setValues(0, trimInds);
  nTrim2.knotVector.setValues(0, tknots2);
  trimInds[0] = 7;
  trimInds[1] = 8;
  trimInds[2] = 9;
  trimInds[3] = 4;
  nTrim3.linkage.setValue(SoProfile.Profiles.ADD_TO_CURRENT);
  nTrim3.index.setValues(0, trimInds);
  nTrim3.knotVector.setValues(0, tknots3);

  surfSep.addChild(trimPts);
  surfSep.addChild(nTrim1);
  surfSep.addChild(nTrim2);
  surfSep.addChild(nTrim3);
  surfSep.addChild(surface);

  return surfSep;
}