Hello, I saw in MITK code that in order to transform a Surface Data Node, you do it like this:
1) To get the IndexToWorldTransform of the node I want to transform: mitk::AffineTransform3D::Pointer originalTransform = surfaceToTransform-> GetData()->GetGeometry()->GetIndexToWorldTransform(); 2) To concatenate the "originalTransform" with the one I want to apply, let's call it "registrationTransformation" originalTransform->Compose(registrationTransformation); 3) Then save the result in a new Transformation and mitk::AffineTransform3D::Pointer newTransform = mitk::AffineTransform3D::New(); //create new image transform... setting the composed directly leads to an error itk::Matrix<mitk::ScalarType, 3, 3> rotationFloatNew = originalTransform-> GetMatrix(); itk::Vector<mitk::ScalarType, 3> translationFloatNew = originalTransform-> GetOffset(); newTransform->SetMatrix(rotationFloatNew); newTransform->SetOffset(translationFloatNew); 4) To set this new transform to the IndexToWorldTransform of the Node: surfaceToTransform->GetData()->GetGeometry()->SetIndexToWorldTransform (newImageTransform); My question is: If I want to undo the transformation, let's say to come back to the original IndexToWorldTransform, the only way is to save it into a new variable before modifying its values? But If I have to work with many transformed objects, saving all its original transformations would be the correct approach? And another topic related with this. Very simple example: I have a vtkConeSource created into a mitkSurface stored in a DataNode. If I operate on its Geometry and apply mitk::Operations over the cone node it works perfectly. BUT, if I want to use any vtk filters and operate with the cone vtkPolyData, it has still the original transformation. So I have to apply vtkTransform appart from mitk::Operation to the polydata to be able to use it... Is that OK?? It seems to me that I am duplicating efforts... Thank you very much in advance! Best, Rocío -- Rocío López Velazco *SimbioSYS** group, BCN MedTech* *UniversityPompeu Fabra* *Department of Information and Communication Technologies Roc Boronat, 122 (Tànger Building), 08018 Barcelona Office 55 119 https://bcn-medtech.upf.edu/ <https://bcn-medtech.upf.edu/>*
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