[Paraview] How to generate a depth map from a ParaView scene

Tue Dec 7 08:56:07 EST 2010

Hi,

If you want to use the depth map to improve some rendering, I would 
recommend trying the multipass framework.
You can have a look in the Example/Plugin/RenderPassViews directory in the 
sources, or you can have some higher level description at 
http://www.vtk.org/Wiki/VTK/MultiPass_Rendering

Stephane

Stephane PLOIX
Pilote Opérationnel - Visualisation scientifique
EDF - R&D
SINETICS
1, Av du Général de Gaulle
92140 Clamart

stephane.ploix at edf.fr
Tél. : +33 (0) 1 47 65 51 10

Un geste simple pour l'environnement, n'imprimez ce message que si vous en 
avez l'utilité.

dave.demarle at kitware.com 
Envoyé par : paraview-bounces at paraview.org
07/12/2010 14:21

A
baaden at smplinux.de
cc
paraview at paraview.org
Objet
Re: [Paraview] How to generate a depth map from a ParaView scene

I'ld try this path:

from the python shell get a hold of the current render view proxy
http://www.paraview.org/ParaQ/Doc/Nightly/html/classvtkSMRenderViewProxy.html

from that get a hold of the vtkRenderWindow
http://www.vtk.org/doc/nightly/html/classvtkRenderWindow.html

on that call GetZBufferData

David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109

On Tue, Dec 7, 2010 at 4:07 AM, Marc Baaden <baaden at smplinux.de> wrote:

Hi,

We are experimenting with some 3D visualization of data/paraview scenes, 
where we need
both an image of the scene and the corresponding depthmap (or z-buffer; 
grayscale image
where each pixel color corresponds to the distance from the camera 
viewpoint).

I was wondering how to achieve such a depthmap within paraview (from some 
3D data such
as a surface or a polygonal object). I guess such a filter does not exist 
right out of
the box?

Probably the elevation filter could be used for this, but I was wondering 
how I could get
it to use the right axis (perpendicular to the screen from the camera 
position)?
Thanks in advance for any hints.

Kind regards,
Marc Baaden

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