Method SetScale

Rendering/Core/vtkInteractorStyle3D.cxx:258–288

}

void vtkInteractorStyle3D::SetScale(vtkCamera* camera, double newScale)
{
  vtkRenderWindowInteractor3D* rwi = static_cast<vtkRenderWindowInteractor3D*>(this->Interactor);

  double* trans = rwi->GetPhysicalTranslation(camera);
  double physicalScale = rwi->GetPhysicalScale();
  double* dop = camera->GetDirectionOfProjection();
  double* pos = camera->GetPosition();
  double hmd[3];
  hmd[0] = (pos[0] + trans[0]) / physicalScale;
  hmd[1] = (pos[1] + trans[1]) / physicalScale;
  hmd[2] = (pos[2] + trans[2]) / physicalScale;

  double newPos[3];
  newPos[0] = hmd[0] * newScale - trans[0];
  newPos[1] = hmd[1] * newScale - trans[1];
  newPos[2] = hmd[2] * newScale - trans[2];

  // Note: New camera properties are overridden by virtual reality render
  // window if head-mounted display is tracked
  camera->SetFocalPoint(
    newPos[0] + dop[0] * newScale, newPos[1] + dop[1] * newScale, newPos[2] + dop[2] * newScale);
  camera->SetPosition(newPos[0], newPos[1], newPos[2]);

  rwi->SetPhysicalScale(newScale);

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