gistfile1.txt

vtkSmartPointer<vtkSTLReader> stlReader = vtkSmartPointer<vtkSTLReader>::New();
vtkSmartPointer<vtkTriangleFilter> triangle = vtkSmartPointer<vtkTriangleFilter>::New();
vtkSmartPointer<vtkPolyData> mesh;


try {
  stlReader->SetFileName(fileName);
	triangle->SetInputConnection(stlReader->GetOutputPort());
	triangle->Update();
	mesh = triangle->GetOutput();
	nVertices = mesh->GetNumberOfPoints(); // number of vertices
	nTriangles = mesh->GetNumberOfPolys(); // number of triangles
}