Method UpdateTransform

Common/DataModel/vtkAnnulus.cxx:183–200

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void vtkAnnulus::UpdateTransform()
{
  const vtkVector3d yAxis(0., 1., 0.);

  vtkVector3d cross = yAxis.Cross(this->Axis);
  const double crossNorm = cross.Normalize();
  const double dot = yAxis.Dot(this->Axis);
  const double angle = vtkMath::DegreesFromRadians(std::atan2(crossNorm, dot));

  vtkNew<vtkTransform> transform;
  transform->Identity();
  transform->Translate(this->Center.GetData());
  transform->RotateWXYZ(angle, cross.GetData());
  transform->Inverse();

  this->SetTransform(transform.GetPointer());
  this->Modified();
}

VTK_ABI_NAMESPACE_END