ENH:Use VTK_POLY_VERTEX in partilces vtkPolyData
ENH:Use VTK_POLY_VERTEX in partilces vtkPolyData

Add representation of particles as a list of
vtkPoints for the particle positions and a single
VTK_POLY_VERTEX cell for each vtkPolyData.

jmerkow/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,biddisco/VTK,demarle/VTK,demarle/VTK,candy7393/VTK,johnkit/vtk-dev,gram526/VTK,SimVascular/VTK,hendradarwin/VTK,cjh1/VTK,candy7393/VTK,sankhesh/VTK,aashish24/VTK-old,gram526/VTK,keithroe/vtkoptix,msmolens/VTK,collects/VTK,mspark93/VTK,cjh1/VTK,ashray/VTK-EVM,gram526/VTK,cjh1/VTK,jmerkow/VTK,mspark93/VTK,demarle/VTK,jmerkow/VTK,demarle/VTK,msmolens/VTK,johnkit/vtk-dev,jmerkow/VTK,sumedhasingla/VTK,johnkit/vtk-dev,sankhesh/VTK,aashish24/VTK-old,aashish24/VTK-old,gram526/VTK,berendkleinhaneveld/VTK,cjh1/VTK,berendkleinhaneveld/VTK,SimVascular/VTK,sumedhasingla/VTK,ashray/VTK-EVM,msmolens/VTK,candy7393/VTK,biddisco/VTK,ashray/VTK-EVM,hendradarwin/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,keithroe/vtkoptix,ashray/VTK-EVM,sumedhasingla/VTK,hendradarwin/VTK,jmerkow/VTK,collects/VTK,sumedhasingla/VTK,sankhesh/VTK,ashray/VTK-EVM,biddisco/VTK,sumedhasingla/VTK,jmerkow/VTK,mspark93/VTK,demarle/VTK,msmolens/VTK,demarle/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,aashish24/VTK-old,SimVascular/VTK,keithroe/vtkoptix,gram526/VTK,keithroe/vtkoptix,SimVascular/VTK,collects/VTK,sankhesh/VTK,hendradarwin/VTK,candy7393/VTK,johnkit/vtk-dev,jmerkow/VTK,cjh1/VTK,biddisco/VTK,sankhesh/VTK,collects/VTK,sankhesh/VTK,johnkit/vtk-dev,biddisco/VTK,biddisco/VTK,ashray/VTK-EVM,SimVascular/VTK,hendradarwin/VTK,keithroe/vtkoptix,aashish24/VTK-old,collects/VTK,candy7393/VTK,msmolens/VTK,johnkit/vtk-dev,sumedhasingla/VTK,biddisco/VTK,candy7393/VTK,hendradarwin/VTK,gram526/VTK,sankhesh/VTK,gram526/VTK,mspark93/VTK,msmolens/VTK,demarle/VTK,sankhesh/VTK,mspark93/VTK,msmolens/VTK,mspark93/VTK,aashish24/VTK-old,ashray/VTK-EVM,mspark93/VTK,keithroe/vtkoptix,cjh1/VTK,ashray/VTK-EVM,SimVascular/VTK,sumedhasingla/VTK,keithroe/vtkoptix,keithroe/vtkoptix,candy7393/VTK,candy7393/VTK,demarle/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,msmolens/VTK,gram526/VTK,mspark93/VTK,collects/VTK,jmerkow/VTK