Method Clip

Common/DataModel/vtkQuadraticPyramid.cxx:684–719

------------------------------------------------------------------------------ Clip this quadratic pyramid using scalar value provided. Like contouring, except that it cuts the pyramid to produce tetrahedra.

// except that it cuts the pyramid to produce tetrahedra.
//
void vtkQuadraticPyramid::Clip(double value, vtkDataArray* cellScalars,
  vtkIncrementalPointLocator* locator, vtkCellArray* tets, vtkPointData* inPd, vtkPointData* outPd,
  vtkCellData* inCd, vtkIdType cellId, vtkCellData* outCd, int insideOut)
{
  int i;
  // create six linear pyramid + 4 tetra
  this->Subdivide(inPd, inCd, cellId, cellScalars);

  // contour each linear pyramid separately
  this->Scalars->SetNumberOfTuples(5); // num of vertices
  for (i = 0; i < 6; i++)              // for each subdivided pyramid
  {
    for (int j = 0; j < 5; j++) // for each of the five vertices of the pyramid
    {
      this->Pyramid->Points->SetPoint(j, this->Points->GetPoint(LinearPyramids[i][j]));
      this->Pyramid->PointIds->SetId(j, LinearPyramids[i][j]);
      this->Scalars->SetValue(j, this->CellScalars->GetValue(LinearPyramids[i][j]));
    }
    this->Pyramid->Clip(value, this->Scalars, locator, tets, this->PointData, outPd, this->CellData,
      i, outCd, insideOut);
  }

  this->Scalars->SetNumberOfTuples(4); // num of vertices
  for (i = 6; i < 10; i++)             // for each subdivided tetra
  {
    for (int j = 0; j < 4; j++) // for each of the four vertices of the tetra
    {
      this->Tetra->Points->SetPoint(j, this->Points->GetPoint(LinearPyramids[i][j]));
      this->Tetra->PointIds->SetId(j, LinearPyramids[i][j]);
      this->Scalars->SetValue(j, this->CellScalars->GetValue(LinearPyramids[i][j]));
    }
    this->Tetra->Clip(value, this->Scalars, locator, tets, this->PointData, outPd, this->CellData,
      i, outCd, insideOut);
  }
  this->ResizeArrays(13);
}

//------------------------------------------------------------------------------
// Compute interpolation functions for the fifteen nodes.