Method OnMouseMove

Interaction/Widgets/vtkBoxWidget.cxx:756–839

}

void vtkBoxWidget::OnMouseMove()
{
  // See whether we're active
  if (this->State == vtkBoxWidget::Outside || this->State == vtkBoxWidget::Start)
  {
    return;
  }

  int X = this->Interactor->GetEventPosition()[0];
  int Y = this->Interactor->GetEventPosition()[1];

  // Do different things depending on state
  // Calculations everybody does
  double focalPoint[4], pickPoint[4], prevPickPoint[4];
  double z, vpn[3];

  vtkCamera* camera = this->CurrentRenderer->GetActiveCamera();
  if (!camera)
  {
    return;
  }

  // Compute the two points defining the motion vector
  this->ComputeWorldToDisplay(
    this->LastPickPosition[0], this->LastPickPosition[1], this->LastPickPosition[2], focalPoint);
  z = focalPoint[2];
  this->ComputeDisplayToWorld(double(this->Interactor->GetLastEventPosition()[0]),
    double(this->Interactor->GetLastEventPosition()[1]), z, prevPickPoint);
  this->ComputeDisplayToWorld(double(X), double(Y), z, pickPoint);

  // Process the motion
  if (this->State == vtkBoxWidget::Moving)
  {
    // Okay to process
    if (this->CurrentHandle)
    {
      if (this->RotationEnabled && this->CurrentHandle == this->HexFace)
      {
        camera->GetViewPlaneNormal(vpn);
        this->Rotate(X, Y, prevPickPoint, pickPoint, vpn);
      }
      else if (this->TranslationEnabled && this->CurrentHandle == this->Handle[6])
      {
        this->Translate(prevPickPoint, pickPoint);
      }
      else if (this->TranslationEnabled && this->ScalingEnabled)
      {
        if (this->CurrentHandle == this->Handle[0])
        {
          this->MoveMinusXFace(prevPickPoint, pickPoint);
        }
        else if (this->CurrentHandle == this->Handle[1])
        {
          this->MovePlusXFace(prevPickPoint, pickPoint);
        }
        else if (this->CurrentHandle == this->Handle[2])
        {
          this->MoveMinusYFace(prevPickPoint, pickPoint);