[vtkusers] bug with multiple render windows?

[John Biddiscombe]

If you render a single actors to different renderwindows or renderers, you must turn on immediate mode rendering. Does it still allocate tons of memory if you 
map->SetImmediateModeRenderingOn();
or whatever the syntax is?

JB


-----Original Message-----
From: Frank Broicher [mailto:broicher at techinfo.rwth-aachen.de]
Sent: 25 February 2003 08:28
To: vtkusers at public.kitware.com
Subject: Re: [vtkusers] bug with multiple render windows?


Hi everybody, hi Nick, John, and Nigel

first of all I think I should introduce a minimal program that produces
the memory leak. As you can see there are two windows opened that render
the same scene. When the rendering starts, memory is allocated rapidly
(on an Athlon 1.2GHz approx. 6MB per second), so the render function is
our starting point.

With best regards
	Frank

//////////////////////////////////////////////
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkActor.h>
#include <vtkPolyDataMapper.h>

int main ()
{
   vtkRenderWindow * renWin  = vtkRenderWindow::New ();
   vtkRenderWindow * renWin2 = vtkRenderWindow::New ();

   vtkRenderer * ren1 = vtkRenderer::New();
   vtkRenderer * ren2 = vtkRenderer::New();

   vtkSphereSource   *sphere;
   vtkPolyDataMapper *map;
   vtkActor          *aSphere;

   renWin ->AddRenderer(ren1);
   renWin2->AddRenderer(ren2);

   sphere = vtkSphereSource::New();

   map = vtkPolyDataMapper::New();
   map->SetInput(sphere->GetOutput());

   aSphere = vtkActor::New();
   aSphere->SetMapper(map);

   ren1->AddActor(aSphere);
   ren2->AddActor(aSphere);

   while (1)
     {
       renWin ->Render();
       renWin2->Render();
     }
}
//////////////////////////////////////////////


-- 
Dipl.-Inform. F. H. Broicher

Chair of Technical Computer Science  Lehrstuhl f. Technische Informatik
RWTH Aachen University                                      RWTH-Aachen
Ahornstraße 55,  Room 2226
D-52074 Aachen
------------------------------------------------------------------------
  Tel.: +49 (241) 80 23636       mailto:broicher at techinfo.rwth-aachen.de
  Fax.: +49 (241) 80 22308       mailto:frank.broicher at ieee.org
------------------------------------------------------------------------
Fate, it seems, is not without a sense of irony. (Morpheus, The Matrix)


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