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0011391

VTK

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public

2010-11-02 05:17

2016-08-12 09:55

Reporter

Simon ESNEAULT

Assigned To

Kitware Robot

Priority

normal

Severity

minor

Reproducibility

always

Status

closed

Resolution

moved

Platform

OS Version

Product Version

Target Version

Fixed in Version

Summary

0011391: vtkVolumeTextureMapper3D memory consumption since 5.6

Description

Hi All,

Since vtk 5.6 is out, we have some trouble using vtkVolumeTextureMapper3D.

With VTK 5.4 rendering a volume of 512x512x366 consumes around 500 Mo and needs one or two seconds to load. The interactivity is good (20 fps)
With VTK 5.6, rendering the same volume consumes 1700 Mo and needs more than 30 seconds to load. And the interactivity is unusable. (~1 fps)
Test done on an intel i7 870 cpu, with an nvidia gtx 260, Ubuntu Linux 64 bits (same result on windows 7).

After some investigation, it appears that the pb, is the use of MAX_3D_TEXTURE_SIZE in the file vtkOpenGLVolumeTextureMapper3D.cxx instead of an harcoded max texture size (128*256*256) as it used to be in vtk 5.4. In the documentation it is said that all the volume will be resampled to a 128*256*256 volume, but it's no longer true in > 5.4.

As a rough hack, if we changed the code around line 1970 of the file vtkOpenGLVolumeTextureMapper3D.cxx :

int vtkOpenGLVolumeTextureMapper3D::IsTextureSizeSupported(int size[3], components)
{
  GLint maxSize;
  glGetIntegerv(vtkgl::MAX_3D_TEXTURE_SIZE,&maxSize);

  if(size[0]>maxSize || size[1]>maxSize || size[2]>maxSize)
    {
    return 0;
    }

... into ...

int vtkOpenGLVolumeTextureMapper3D::IsTextureSizeSupported(int size[3], components)
{
  GLint maxSize;
  glGetIntegerv(vtkgl::MAX_3D_TEXTURE_SIZE,&maxSize);
  maxSize = 256;

  if(size[0]>maxSize || size[1]>maxSize || size[2]>maxSize)
    {
    return 0;
    }

... we get back the good old behavior of this 3D volume mapper.

Maybe this can be set as an option, something like mapper->Max3DTextureSizeOn(), to prevent that problem.

Thanks for listening, and thanks a lot for VTK.

-Simon

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Notes
(0027473) Julien Finet (developer) 2011-09-13 09:24	What is the maxSize you get from vtkgl::MAX_3D_TEXTURE_SIZE ?

(0037208) Kitware Robot (administrator) 2016-08-12 09:55	Resolving issue as `moved`. This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

Issue History
Date Modified	Username	Field	Change
2010-11-02 05:17	Simon ESNEAULT	New Issue
2011-06-16 13:11	Zack Galbreath	Category	=> (No Category)
2011-09-13 09:24	Julien Finet	Note Added: 0027473
2016-08-12 09:55	Kitware Robot	Note Added: 0037208
2016-08-12 09:55	Kitware Robot	Status	expired => closed
2016-08-12 09:55	Kitware Robot	Resolution	open => moved
2016-08-12 09:55	Kitware Robot	Assigned To	=> Kitware Robot