Method OnLeftButtonUp

Interaction/Style/vtkInteractorStyleUnicam.cxx:213–273

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//------------------------------------------------------------------------------
void vtkInteractorStyleUnicam::OnLeftButtonUp()
{
  int x = this->Interactor->GetEventPosition()[0];
  int y = this->Interactor->GetEventPosition()[1];

  this->ButtonDown = vtkInteractorStyleUnicam::NONE;

  if (state == vtkInteractorStyleUnicam::CAM_INT_ROT && this->IsDot)
  {
    this->FocusSphereRenderer->RemoveActor(this->FocusSphere);
    this->IsDot = 0;
  }
  else if (state == vtkInteractorStyleUnicam::CAM_INT_CHOOSE)
  {
    if (this->IsDot)
    {
      this->FocusSphereRenderer->RemoveActor(this->FocusSphere);
      this->IsDot = 0;
    }
    else
    {
      this->FocusSphere->SetPosition(this->DownPt[0], this->DownPt[1], this->DownPt[2]);

      double from[3];
      this->FindPokedRenderer(x, y);
      vtkCamera* camera = this->CurrentRenderer->GetActiveCamera();
      camera->GetPosition(from);

      double vec[3];
      vec[0] = this->DownPt[0] - from[0];
      vec[1] = this->DownPt[1] - from[1];
      vec[2] = this->DownPt[2] - from[2];

      double at_v[4];
      camera->GetDirectionOfProjection(at_v);
      vtkMath::Normalize(at_v);

      // calculate scale so focus sphere always is the same size on the screen
      double s = 0.02 * vtkMath::Dot(at_v, vec);

      this->FocusSphere->SetScale(s, s, s);

      this->FindPokedRenderer(x, y);
      this->FocusSphereRenderer = this->CurrentRenderer;
      this->FocusSphereRenderer->AddActor(this->FocusSphere);

      this->IsDot = 1;
    }
    this->Interactor->Render();
  }

  vtkRenderWindowInteractor* rwi = this->Interactor;
  rwi->GetRenderWindow()->SetDesiredUpdateRate(rwi->GetStillUpdateRate());
  rwi->Render();
  if (this->UseTimers)
  {
    rwi->DestroyTimer(this->TimerId);
  }