[vtkusers] extract verticies from polydata

[Matt and Elizabeth Kay]

Hi All-

I have a vtkPolyData called 'spoly'. I would like to
extract from spoly the vertex positions of each
polygon in the dataset and save them in a float array
called 'verticies'. Polygons are triangles. Here is a
segment of my code:

float **verticies;int i, numverts, numcells;

vtkSphereSource *sphere = vtkSphereSource::New();
   sphere->SetRadius(1);
   sphere->Update();

vtkPolyData *spoly=sphere->GetOutput();
numverts=spoly->GetNumberOfPoints();
numcells=spoly->GetNumberOfCells();
verticies=(float **)malloc((unsigned
int)numcells*sizeof(float*));
for (i=0;i<numcells;++i){
  verticies[i]=(float *)malloc(3*sizeof(float));}
Now I want something like this, but of course this
doesn't work:

for (i=0;i<numcells;++i){
  points[i][0] spoly->GetVertex(i,0);
  points[i][1] spoly->GetVertex(i,1);
  points[i][2] spoly->GetVertex(i,2);
}


Any suggestions?

Thanks a ton,
Matt



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