Method UniformScale

Interaction/Style/vtkInteractorStyleTrackballActor.cxx:466–496

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//------------------------------------------------------------------------------
void vtkInteractorStyleTrackballActor::UniformScale()
{
  if (this->CurrentRenderer == nullptr || this->InteractionProp == nullptr)
  {
    return;
  }

  vtkRenderWindowInteractor* rwi = this->Interactor;

  int dy = rwi->GetEventPosition()[1] - rwi->GetLastEventPosition()[1];

  double* obj_center = this->InteractionProp->GetCenter();
  double* center = this->CurrentRenderer->GetCenter();

  double yf = dy / center[1] * this->MotionFactor;
  double scaleFactor = pow(1.1, yf);

  double** rotate = nullptr;

  double scale[3];
  scale[0] = scale[1] = scale[2] = scaleFactor;

  this->Prop3DTransform(this->InteractionProp, obj_center, 0, rotate, scale);

  if (this->AutoAdjustCameraClippingRange)
  {
    this->CurrentRenderer->ResetCameraClippingRange();
  }

  rwi->Render();
}

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void vtkInteractorStyleTrackballActor::PrintSelf(ostream& os, vtkIndent indent)