ENH: cleanup multitextureing support functions.
ENH: cleanup multitextureing support functions.

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