[vtkusers] Visualisation of a large vtk files

[Lasso, Andras (GE Healthcare)]

Hi Patrick,

Would you like to render a high-resolution image? You may have to use
off-screen rendering to render an image that is larger than your display
size (typically 1024x768 or 1280x1024).

If your 2-dimensional vtk file is a bitmap, then 1185 x 2986 is not a
large data set (VTK_FAQ#How_to_handle_large_data_sets_in_VTK doesn't
apply). You can display it on a plane as a texture (see
resampledTexture.tcl sample).

Andras


-----Original Message-----
From: vtkusers-bounces+andras.lasso=med.ge.com at vtk.org
[mailto:vtkusers-bounces+andras.lasso=med.ge.com at vtk.org] On Behalf Of
ueberdrueber at warpmail.net
Sent: Friday, May 04, 2007 9:09 AM
To: vtkusers at vtk.org
Subject: [vtkusers] Visualisation of a large vtk files


Hi!

I have some problems displaying a 2-dimensional vtk file with the
dimensions 1185 x 2986 x 1. My small command line test program reads in
the data correctly (I have checked that by producing some output) but
when it comes to visualization the hard disk is getting very busy for a
while (whereas CPU is not used extensively) and then it crashes. 

I used a debugger to try to find the cause. It detects an access
violation in vtkOpenGLPolyDataMapper. The last call is
vtkOpenGLPolyDataMapper::DrawPolygons( ... ) which then seems to cause
some problem in the Windows system library nvoglnt.dll.

I tried to solve the problem by following the advices at
http://www.vtk.org/Wiki/VTK_FAQ#How_to_handle_large_data_sets_in_VTK
but that didn't solve my problem. However, it has to be possible as
visualisation of the same file in fact works in Paraview.
I'm using VTK Version 5.0.3.

I would be glad if someone had some advice.

Regards,
Patrick
-- 
  
  ueberdrueber at warpmail.net

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