[vtkusers] Re: Drawing Grid Lines

[Nigel Nunn]

Hi Poonam, 
 
> I want to draw grid lines on the vtk rendering window. 
 
vtkRectilinearGrid and vtkRectilinearGridGeometryFilter work 
together to allow high-powered grid construction.  In an old 
C++ project, I used something like this to get an XY grid: 
(also needed YZ and ZX grids) 
----------------------------------------------  
  int m = 30, n = 30, p = 15; 
 
  rgrid = vtkRectilinearGrid::New(); 
    rgrid->SetDimensions(m,n,p); 
    rgrid->SetXCoordinates(xCoords); 
    rgrid->SetYCoordinates(yCoords); 
    rgrid->SetZCoordinates(zCoords); 
 
  planeXY = vtkRectilinearGridGeometryFilter::New(); 
    planeXY->SetInput(rgrid); 

    planeXY->SetExtent( 0,   (m-1),  0,   (n-1),  0, 0   ); 
  //planeXZ->SetExtent( 0,   (m-2), (n-1),(n-1),  1,(p-1)); 
  //planeYZ->SetExtent((m-1),(m-1),  0,   (n-2),  1, p   ); 
  
  mapXY = vtkPolyDataMapper::New(); 
    mapXY->SetInput(planeXY->GetOutput()); 

  actorXY = vtkActor::New(); 
    actorXY->SetMapper(mapXY); 
 
  // Lock each grid Actor 
  actorXY->PickableOff(); 
 
---------------------------------------------- 
See the Vtk documentation for more help. 
Nigel 
 
 

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