Method PickNormal

Interaction/Widgets/vtkCoordinateFrameRepresentation.cxx:1381–1411

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//------------------------------------------------------------------------------
bool vtkCoordinateFrameRepresentation::PickNormal(int X, int Y, bool snapToMeshPoint)
{
  this->HardwarePicker->SetSnapToMeshPoint(snapToMeshPoint);
  vtkAssemblyPath* path = this->GetAssemblyPath(X, Y, 0., this->HardwarePicker);
  if (path == nullptr) // actors of renderer were not touched
  {
    if (this->PickCameraFocalInfo)
    {
      double normal[3];
      this->HardwarePicker->GetPickNormal(normal);
      this->SetNormal(normal);
      this->BuildRepresentation();
    }
    return this->PickCameraFocalInfo;
  }
  else // actors of renderer were touched
  {
    double normal[3];
    this->HardwarePicker->GetPickNormal(normal);
    if (!std::isnan(normal[0]) || !std::isnan(normal[1]) || !std::isnan(normal[2]))
    {
      this->SetNormal(normal);
      this->BuildRepresentation();
      return true;
    }
    else
    {
      return false;
    }
  }
}

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bool vtkCoordinateFrameRepresentation::PickDirectionPoint(int X, int Y, bool snapToMeshPoint)