Method SetBoundaryArrays

Filters/General/vtkLoopBooleanPolyDataFilter.cxx:692–739

Set the boundary arrays on the mesh

// Set the boundary arrays on the mesh
void vtkLoopBooleanPolyDataFilter::Impl::SetBoundaryArrays()
{
  // Variables used in the function
  // Point locator to find points on mesh that are the points on the boundary
  // lines
  vtkSmartPointer<vtkPointLocator> pointLocator1 = vtkSmartPointer<vtkPointLocator>::New();
  vtkSmartPointer<vtkPointLocator> pointLocator2 = vtkSmartPointer<vtkPointLocator>::New();
  pointLocator1->SetDataSet(this->Mesh[0]);
  pointLocator1->BuildLocator();
  pointLocator2->SetDataSet(this->Mesh[1]);
  pointLocator2->BuildLocator();

  int numPoints = this->IntersectionLines->GetNumberOfPoints();

  for (vtkIdType pointId = 0; pointId < numPoints; pointId++)
  {
    double pt[3];
    this->IntersectionLines->GetPoint(pointId, pt);
    // Find point on mesh
    vtkIdType bp1 = pointLocator1->FindClosestPoint(pt);
    this->PointMapper[0][bp1] = pointId;
    this->ReversePointMapper[0][pointId] = bp1;
    this->BoundaryPointArray[0]->InsertValue(bp1, 1);
    vtkSmartPointer<vtkIdList> bpCellIds1 = vtkSmartPointer<vtkIdList>::New();
    this->Mesh[0]->GetPointCells(bp1, bpCellIds1);
    // Set the point mapping array
    // Assign each cell attached to this point as a boundary cell
    for (int i = 0; i < bpCellIds1->GetNumberOfIds(); i++)
    {
      this->BoundaryCellArray[0]->InsertValue(bpCellIds1->GetId(i), 1);
      this->Checked[0][bpCellIds1->GetId(i)] = 1;
    }

    vtkIdType bp2 = pointLocator2->FindClosestPoint(pt);
    this->PointMapper[1][bp2] = pointId;
    this->ReversePointMapper[1][pointId] = bp2;
    this->BoundaryPointArray[1]->InsertValue(bp2, 1);
    vtkSmartPointer<vtkIdList> bpCellIds2 = vtkSmartPointer<vtkIdList>::New();
    this->Mesh[1]->GetPointCells(bp2, bpCellIds2);
    // Set the point mapping array
    // Assign each cell attached to this point as a boundary cell
    for (int i = 0; i < bpCellIds2->GetNumberOfIds(); i++)
    {
      this->BoundaryCellArray[1]->InsertValue(bpCellIds2->GetId(i), 1);
      this->Checked[1][bpCellIds2->GetId(i)] = 1;
    }
  }
}

// Set the original finding region check arrays
void vtkLoopBooleanPolyDataFilter::Impl::SetCheckArrays()