ENH:Corrected derivative calculation to take into account subId and use the parametric center
ENH:Corrected derivative calculation to take into account subId and use the parametric center

daviddoria/PointGraphsPhase1,sumedhasingla/VTK,sankhesh/VTK,jmerkow/VTK,sgh/vtk,sumedhasingla/VTK,jeffbaumes/jeffbaumes-vtk,spthaolt/VTK,SimVascular/VTK,keithroe/vtkoptix,gram526/VTK,jmerkow/VTK,hendradarwin/VTK,sgh/vtk,mspark93/VTK,daviddoria/PointGraphsPhase1,spthaolt/VTK,aashish24/VTK-old,daviddoria/PointGraphsPhase1,keithroe/vtkoptix,mspark93/VTK,demarle/VTK,SimVascular/VTK,arnaudgelas/VTK,keithroe/vtkoptix,naucoin/VTKSlicerWidgets,johnkit/vtk-dev,candy7393/VTK,aashish24/VTK-old,candy7393/VTK,mspark93/VTK,mspark93/VTK,aashish24/VTK-old,berendkleinhaneveld/VTK,candy7393/VTK,cjh1/VTK,SimVascular/VTK,candy7393/VTK,hendradarwin/VTK,ashray/VTK-EVM,hendradarwin/VTK,msmolens/VTK,arnaudgelas/VTK,hendradarwin/VTK,Wuteyan/VTK,Wuteyan/VTK,biddisco/VTK,daviddoria/PointGraphsPhase1,sankhesh/VTK,sankhesh/VTK,jeffbaumes/jeffbaumes-vtk,demarle/VTK,collects/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,keithroe/vtkoptix,gram526/VTK,ashray/VTK-EVM,hendradarwin/VTK,Wuteyan/VTK,naucoin/VTKSlicerWidgets,aashish24/VTK-old,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,jeffbaumes/jeffbaumes-vtk,daviddoria/PointGraphsPhase1,aashish24/VTK-old,sumedhasingla/VTK,arnaudgelas/VTK,biddisco/VTK,sumedhasingla/VTK,hendradarwin/VTK,aashish24/VTK-old,berendkleinhaneveld/VTK,candy7393/VTK,msmolens/VTK,jmerkow/VTK,msmolens/VTK,johnkit/vtk-dev,SimVascular/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,collects/VTK,spthaolt/VTK,daviddoria/PointGraphsPhase1,mspark93/VTK,jmerkow/VTK,sankhesh/VTK,jmerkow/VTK,SimVascular/VTK,biddisco/VTK,mspark93/VTK,collects/VTK,johnkit/vtk-dev,demarle/VTK,sankhesh/VTK,naucoin/VTKSlicerWidgets,jeffbaumes/jeffbaumes-vtk,keithroe/vtkoptix,sankhesh/VTK,johnkit/vtk-dev,gram526/VTK,keithroe/vtkoptix,cjh1/VTK,biddisco/VTK,ashray/VTK-EVM,biddisco/VTK,jeffbaumes/jeffbaumes-vtk,johnkit/vtk-dev,msmolens/VTK,ashray/VTK-EVM,msmolens/VTK,cjh1/VTK,mspark93/VTK,naucoin/VTKSlicerWidgets,sgh/vtk,Wuteyan/VTK,arnaudgelas/VTK,gram526/VTK,berendkleinhaneveld/VTK,gram526/VTK,collects/VTK,arnaudgelas/VTK,ashray/VTK-EVM,candy7393/VTK,cjh1/VTK,spthaolt/VTK,jmerkow/VTK,demarle/VTK,msmolens/VTK,msmolens/VTK,demarle/VTK,ashray/VTK-EVM,sumedhasingla/VTK,biddisco/VTK,keithroe/vtkoptix,sgh/vtk,demarle/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,sumedhasingla/VTK,jmerkow/VTK,demarle/VTK,gram526/VTK,ashray/VTK-EVM,spthaolt/VTK,naucoin/VTKSlicerWidgets,sgh/vtk,sankhesh/VTK,Wuteyan/VTK,johnkit/vtk-dev,Wuteyan/VTK,ashray/VTK-EVM,collects/VTK,mspark93/VTK,collects/VTK,keithroe/vtkoptix,demarle/VTK,gram526/VTK,spthaolt/VTK,berendkleinhaneveld/VTK,SimVascular/VTK,sumedhasingla/VTK,biddisco/VTK,SimVascular/VTK,arnaudgelas/VTK,msmolens/VTK,candy7393/VTK,sgh/vtk,spthaolt/VTK,cjh1/VTK,Wuteyan/VTK,candy7393/VTK,naucoin/VTKSlicerWidgets,cjh1/VTK,SimVascular/VTK,jmerkow/VTK,gram526/VTK