[osg-users] crash with setTextureAttributeAndModes

2009-10-27 Thread Otto Cologne 
Hi,

I'm having a crash with setTextureAttributeAndModes I don't know how to fix. 

To explain the issue. I have a list of data sets which hold a pointer to a 
osg::Texture3D. The texture mixing is done in a shader and my texture update 
function containing the following loop is called from an update  callback. 
Since the order of the textures can/must change i loop over the textures and do 
this


Code:

osg::StateSet* sliceState = m_sliceNode-getOrCreateStateSet();
for ( size_t i = 0; i  datasetList.size(); ++i)
{
  osg::Texture3D* texture3D = datasetList[i] )-getTexture3D();
  sliceState-setTextureAttributeAndModes( i, texture3D, 
osg::StateAttribute::ON );
}




This works just find when adding one texture after another. However when the 
order changes, thus overwriting a different order it crashes. So apparently I'm 
doing it wrong. 

Any help would be greatly appreciated.
... 

Thank you!

Cheers,
Otto

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Re: [osg-users] crash with setTextureAttributeAndModes

2009-10-27 Thread David Callu 
Hi Otto


We don't have enough information to solve you problem.
Have you try to debug you application ?
Have you an available callstack to found where you application crash ?
Have you a simple program test which isolate the problem ?
but more simply, is your datasetList array store texture pointer in
osg::ref_ptr ?

Nobody can help you with this too little description.
This probably a misusing of osg code more than a bug in OSG.

HTH
David Callu



2009/10/27 Otto Cologne schur...@gmx.de

 Hi,

 I'm having a crash with setTextureAttributeAndModes I don't know how to
 fix.

 To explain the issue. I have a list of data sets which hold a pointer to a
 osg::Texture3D. The texture mixing is done in a shader and my texture update
 function containing the following loop is called from an update  callback.
 Since the order of the textures can/must change i loop over the textures and
 do this


 Code:

 osg::StateSet* sliceState = m_sliceNode-getOrCreateStateSet();
 for ( size_t i = 0; i  datasetList.size(); ++i)
 {
  osg::Texture3D* texture3D = datasetList[i] )-getTexture3D();
  sliceState-setTextureAttributeAndModes( i, texture3D,
 osg::StateAttribute::ON );
 }




 This works just find when adding one texture after another. However when
 the order changes, thus overwriting a different order it crashes. So
 apparently I'm doing it wrong.

 Any help would be greatly appreciated.
 ...

 Thank you!

 Cheers,
 Otto

 --
 Read this topic online here:
 http://forum.openscenegraph.org/viewtopic.php?p=18753#18753





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Re: [osg-users] crash with setTextureAttributeAndModes

2009-10-27 Thread Ulrich Hertlein 

Hi Otto,

On 27/10/09 10:12 AM, Otto Cologne wrote:

I'm having a crash with setTextureAttributeAndModes I don't know how to fix.

To explain the issue. I have a list of data sets which hold a pointer to a
osg::Texture3D. The texture mixing is done in a shader and my texture update 
function
containing the following loop is called from an update  callback. Since the 
order of
the textures can/must change i loop over the textures and do this
...

osg::StateSet* sliceState = m_sliceNode-getOrCreateStateSet(); for ( size_t i = 
0; i
datasetList.size(); ++i) { osg::Texture3D* texture3D = datasetList[i]
)-getTexture3D(); sliceState-setTextureAttributeAndModes( i, texture3D,
osg::StateAttribute::ON ); }

This works just find when adding one texture after another. However when the 
order
changes, thus overwriting a different order it crashes. So apparently I'm doing 
it
wrong.


David already hinted at the answer: you need to use ref_ptrTexture3D for your 
datasetList, not Texture3D*.


Or manually do a 'ref' on each object.

Cheers,
/ulrich
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Re: [osg-users] crash with setTextureAttributeAndModes

2009-10-27 Thread Otto Cologne 
Yes you are right :) I was just about to post that i followed that hint and 
used it. It works now. Thanks.


Ulrich Hertlein wrote:
 Hi Otto,
 
 On 27/10/09 10:12 AM, Otto Cologne wrote:
 
  I'm having a crash with setTextureAttributeAndModes I don't know how to fix.
  
  To explain the issue. I have a list of data sets which hold a pointer to a
  osg::Texture3D. The texture mixing is done in a shader and my texture 
  update function
  containing the following loop is called from an update  callback. Since the 
  order of
  the textures can/must change i loop over the textures and do this
  ...
  
  osg::StateSet* sliceState = m_sliceNode-getOrCreateStateSet(); for ( 
  size_t i = 0; i
  datasetList.size(); ++i) { osg::Texture3D* texture3D = datasetList[i]
  )-getTexture3D(); sliceState-setTextureAttributeAndModes( i, texture3D,
  osg::StateAttribute::ON ); }
  
  This works just find when adding one texture after another. However when 
  the order
  changes, thus overwriting a different order it crashes. So apparently I'm 
  doing it
  wrong.
  
 
 David already hinted at the answer: you need to use ref_ptrTexture3D for 
 your 
 datasetList, not Texture3D*.
 
 Or manually do a 'ref' on each object.
 
 Cheers,
 /ulrich
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