[vtkusers] triangulating a cylinder

[debbie larson]

Hi,

I would like to build a vtkPolyData (triangular) representation of a 
cylinder. The points that define the cylinder sit on a number N of 
perpendicular circles (they are equally spaced).

I dont know how to specify the vtkCellArray for the triangles so that they 
match the points. Here it is how I compute the points in the cylinder

-------------------------------------------------------

float pts[number_of_points*N][3];
for (int k=0;k<N;k++)
	{
	  for (int j=0;j<number_of_points;j++)
	    {
	                    
pts[k*number_of_points+j][0]=radius*cos(2*M_PI*j/number_of_points);
pts[k*number_of_points+j][1]=radius*sin(2*M_PI*j/number_of_points);
	      pts[k*number_of_points+j][2]=k*distance_between_circles;
             }
         }
vtkFloatArray* coords=vtkFloatArray::New();
  coords->SetNumberOfComponents(3);
  coords->SetNumberOfTuples(number_of_points*N);

  for (int i=0;i<number_of_points*N;i++)
    {
      coords->SetTuple(i,innerpts[i]);
    }
  vtkPoints points=vtkPoints::New();
  points->SetData(coords);
  ---------------------------------------------------------------------
I would like to do something like

vtkCellArray* tri=vtkCellArray::New();

and assign the points above to tri. How to do it?

Thanks

deb

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