Added doc on transforms

diff --git a/vv/vvSlicer.h b/vv/vvSlicer.h
index 44e1a2cdde7ef23c7baa53c68651fadd497db516..0a0bcca86395deffd27d00230ffbc6e62eeaf2c1 100644 (file)
--- a/vv/vvSlicer.h
+++ b/vv/vvSlicer.h
@@ -207,6 +207,16 @@ protected:
 
   vvLandmarks* mLandmarks;
 
+  //                         __________ Image coordinates accounting for spacing and origin
+  //                            Λ  Λ
+  //                            |  | vvImage.GetTransform()
+  //                            |  |
+  // GetConcatenatedTransform() | _|___ VV world coordinates (mm) (displayed in VV)
+  //                            |  Λ
+  //                            |  | GetSlicingTransform()
+  //                            |  |
+  //                         ___|__|___ VTK world coordinates (mm) (never displayed)
+
   vtkSmartPointer<vtkImageReslice> mImageReslice;
   vtkSmartPointer<vtkTransform> mSlicingTransform;
   vtkSmartPointer<vtkTransform> mConcatenatedTransform;