Method Update

Common/Transforms/vtkAbstractTransform.cxx:320–349

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkAbstractTransform::Update()
{
  auto& internals = *(this->Internals);

  // locking is required to ensure that the class is thread-safe
  internals.UpdateMutex.lock();
  internals.InUpdate = true;

  // check to see if we are a special 'inverse' transform
  if (internals.DependsOnInverse &&
    internals.MyInverse->GetMTime() >= internals.UpdateTime.GetMTime())
  {
    vtkDebugMacro("Updating transformation from its inverse");
    this->InternalDeepCopy(internals.MyInverse);
    this->Inverse();
    vtkDebugMacro("Calling InternalUpdate on the transformation");
    this->InternalUpdate();
  }
  // otherwise just check our MTime against our last update
  else if (this->GetMTime() >= internals.UpdateTime.GetMTime())
  {
    // do internal update for subclass
    vtkDebugMacro("Calling InternalUpdate on the transformation");
    this->InternalUpdate();
  }

  internals.InUpdate = false;
  internals.UpdateTime.Modified();
  internals.UpdateMutex.unlock();
}

//------------------------------------------------------------------------------
int vtkAbstractTransform::CircuitCheck(vtkAbstractTransform* transform)