Method Clip

Common/DataModel/vtkTriangleStrip.cxx:275–317

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//------------------------------------------------------------------------------
void vtkTriangleStrip::Clip(double value, vtkDataArray* cellScalars,
  vtkIncrementalPointLocator* locator, vtkCellArray* tris, vtkPointData* inPd, vtkPointData* outPd,
  vtkCellData* inCd, vtkIdType cellId, vtkCellData* outCd, int insideOut)
{
  int i, numTris = this->Points->GetNumberOfPoints() - 2;
  int id1, id2, id3;
  vtkDataArray* triScalars = cellScalars->NewInstance();
  triScalars->SetNumberOfComponents(cellScalars->GetNumberOfComponents());
  triScalars->SetNumberOfTuples(3);

  for (i = 0; i < numTris; i++)
  {
    if (i % 2)
    {
      id1 = i + 2;
      id2 = i + 1;
      id3 = i;
    }
    else
    {
      id1 = i;
      id2 = i + 1;
      id3 = i + 2;
    }

    this->Triangle->Points->SetPoint(0, this->Points->GetPoint(id1));
    this->Triangle->Points->SetPoint(1, this->Points->GetPoint(id2));
    this->Triangle->Points->SetPoint(2, this->Points->GetPoint(id3));

    this->Triangle->PointIds->SetId(0, this->PointIds->GetId(id1));
    this->Triangle->PointIds->SetId(1, this->PointIds->GetId(id2));
    this->Triangle->PointIds->SetId(2, this->PointIds->GetId(id3));

    triScalars->SetTuple(0, cellScalars->GetTuple(id1));
    triScalars->SetTuple(1, cellScalars->GetTuple(id2));
    triScalars->SetTuple(2, cellScalars->GetTuple(id3));

    this->Triangle->Clip(
      value, triScalars, locator, tris, inPd, outPd, inCd, cellId, outCd, insideOut);
  }

  triScalars->Delete();
}

//------------------------------------------------------------------------------
// Return the center of the point cloud in parametric coordinates.