Method UpdateMaxError

Common/DataModel/vtkGenericCellTessellator.cxx:110–132

------------------------------------------------------------------------------ Description: Update the max error of each error metric according to the error at the mid-point. The type of error depends on the state of the concrete error metric. For instance, it can return an absolute or relative error metric. See RequiresEdgeSubdivision() for a description of the arguments. \pre leftPoint_exists: l

// \pre valid_size: sizeof(leftPoint)=sizeof(midPoint)=sizeof(rightPoint)
//          =GetAttributeCollection()->GetNumberOfPointCenteredComponents()+6
void vtkGenericCellTessellator::UpdateMaxError(
  double* leftPoint, double* midPoint, double* rightPoint, double alpha)
{
  assert("pre: leftPoint_exists" && leftPoint != nullptr);
  assert("pre: midPoint_exists" && midPoint != nullptr);
  assert("pre: rightPoint_exists" && rightPoint != nullptr);
  assert("pre: clamped_alpha" && alpha > 0 && alpha < 1);

  this->ErrorMetrics->InitTraversal();
  vtkGenericSubdivisionErrorMetric* e =
    static_cast<vtkGenericSubdivisionErrorMetric*>(this->ErrorMetrics->GetNextItemAsObject());

  // Once we found at least one error metric that need subdivision,
  // the subdivision has to be done and there is no need to check for other
  // error metrics.
  for (int i = 0; e != nullptr; ++i)
  {
    double error = e->GetError(leftPoint, midPoint, rightPoint, alpha);
    assert("check: positive_error" && error >= 0);
    this->MaxErrors[i] = std::max(error, this->MaxErrors[i]);
    e = static_cast<vtkGenericSubdivisionErrorMetric*>(this->ErrorMetrics->GetNextItemAsObject());
  }
}

//------------------------------------------------------------------------------
// Description: