subject:"\[osg\-users\] texture to file"

Re: [osg-users] texture to file

2009-08-27 Thread Peter Wraae Marino

Hi osgUsers,

I'm still battling with the luminance texture to file.
The problem is I need to save a texture with 32bit floating point
value for each pixel in the texture
as a file and load it in at a later time. (16bit can also be used if
32bit isn't supported).

I have tried all these combinations:

m_rImage = new osg::Image;
//m_rImage-allocateImage( 1024, 1024, 1, GL_LUMINANCE, GL_BYTE );  
// fails
//m_rImage-allocateImage( 1024, 1024, 8, GL_LUMINANCE, GL_BYTE );  
// fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_BYTE ); 
// fails
//m_rImage-allocateImage( 1024, 1024, 16, GL_LUMINANCE, GL_FLOAT );// fails
//m_rImage-allocateImage( 1024, 1024, 32, GL_LUMINANCE, GL_FLOAT );// fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_4_BYTES
);  // fails with crash
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_BYTE );   
//
works ( image 8bit in each RGB )
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_FLOAT );  
//
works ( image 8bit in each RGB ), but all values zero
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_4_BYTES );
//
fails with crash
//m_rImage-allocateImage( 1024, 1024, 32, GL_RED, GL_FLOAT );  
//
works, but fails when writing image to file

the only one that gave anykind of result was the GL_RGB, GL_BYTE ...
am I missing something?

anyone?

Peter

On Wed, Aug 26, 2009 at 1:57 PM, Peter Wraae Marinoosgh...@gmail.com wrote:
 Hi Rafa,

 thanks.. i used your suggestion and it works.

 my only problem now is that the RTT i have created generates a
 GL_LUMINANCE image,
 which format do I use?

 I would like to load and use this texture again as luminance texture.

 any suggestions,
 Peter

 On Tue, Aug 25, 2009 at 12:25 PM, Rafa Gaitanrafa.gai...@gmail.com wrote:
 Hi Peter

 You can attach an image to the camera doing the rtt.

 osg::Image *image = new osg::Image;
 image-allocateImage(tex_width, tex_height, 1, GL_RGBA, GL_UNSIGNED_BYTE);

 // attach the image so its copied on each frame.
 camera-attach(osg::Camera::COLOR_BUFFER, image);

 Rafa.



 On Tue, Aug 25, 2009 at 12:22 PM, Peter Wraae Marinoosgh...@gmail.com 
 wrote:
 Hi Maxim ,

 I believe the readPixels is reading from the framebuffer and not the
 texture (or am I mistaken??)
 remember a RTT usually means I have 2 or more cameras in my scene...
 where one is used
 to do the RTT... so this can lead to a question how would osg::Image
 know which buffer to read from?

 Peter

 On Tue, Aug 25, 2009 at 12:16 PM, Maxim Gammermaxgam...@gmail.com wrote:
 Hi...

 osg::ref_ptrosg::Image image = new osg::Image;

 image-readPixels. example

 if (osgDB::writeImageFile(*image,_filename))

 {

 std::cout  Saved screen image to `_filename` std::endl;

 }

 2009/8/25 Peter Wraae Marino osgh...@gmail.com

 Hi osgUsers,

 I have a question about texture to file. Currently I have render to
 texture (RTT) and would like to save this texture to a file. Is there
 a straight forward method of doing this?

 anyone?

 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org



 --
 Maxim Gammer


 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org





 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org




 --
 Rafael Gaitán Linares
 Instituto de Automática e Informática Industrial  http://www.ai2.upv.es
 Ciudad Politécnica de la Innovación
 Universidad Politécnica de Valencia
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org




 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site




-- 
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
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Re: [osg-users] texture to file

2009-08-27 Thread J.P. Delport

What format are you trying to write the file to? How are you attaching 
the image to your camera? i.e. where are the luminance values coming from?


jp

Peter Wraae Marino wrote:

Hi osgUsers,

I'm still battling with the luminance texture to file.
The problem is I need to save a texture with 32bit floating point
value for each pixel in the texture
as a file and load it in at a later time. (16bit can also be used if
32bit isn't supported).

I have tried all these combinations:

m_rImage = new osg::Image;
//m_rImage-allocateImage( 1024, 1024, 1, GL_LUMINANCE, GL_BYTE );   // 
fails
//m_rImage-allocateImage( 1024, 1024, 8, GL_LUMINANCE, GL_BYTE );   // 
fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_BYTE );  // 
fails
//m_rImage-allocateImage( 1024, 1024, 16, GL_LUMINANCE, GL_FLOAT ); // fails
//m_rImage-allocateImage( 1024, 1024, 32, GL_LUMINANCE, GL_FLOAT ); // fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_4_BYTES
);  // fails with crash
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_BYTE );   
 //
works ( image 8bit in each RGB )
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_FLOAT );  
 //
works ( image 8bit in each RGB ), but all values zero
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_4_BYTES ); //
fails with crash
//m_rImage-allocateImage( 1024, 1024, 32, GL_RED, GL_FLOAT );  
 //
works, but fails when writing image to file

the only one that gave anykind of result was the GL_RGB, GL_BYTE ...
am I missing something?

anyone?

Peter

On Wed, Aug 26, 2009 at 1:57 PM, Peter Wraae Marinoosgh...@gmail.com wrote:

Hi Rafa,

thanks.. i used your suggestion and it works.

my only problem now is that the RTT i have created generates a
GL_LUMINANCE image,
which format do I use?

I would like to load and use this texture again as luminance texture.

any suggestions,
Peter

On Tue, Aug 25, 2009 at 12:25 PM, Rafa Gaitanrafa.gai...@gmail.com wrote:

Hi Peter

You can attach an image to the camera doing the rtt.

osg::Image *image = new osg::Image;
image-allocateImage(tex_width, tex_height, 1, GL_RGBA, GL_UNSIGNED_BYTE);

// attach the image so its copied on each frame.
camera-attach(osg::Camera::COLOR_BUFFER, image);

Rafa.



On Tue, Aug 25, 2009 at 12:22 PM, Peter Wraae Marinoosgh...@gmail.com wrote:

Hi Maxim ,

I believe the readPixels is reading from the framebuffer and not the
texture (or am I mistaken??)
remember a RTT usually means I have 2 or more cameras in my scene...
where one is used
to do the RTT... so this can lead to a question how would osg::Image
know which buffer to read from?

Peter

On Tue, Aug 25, 2009 at 12:16 PM, Maxim Gammermaxgam...@gmail.com wrote:

Hi...

osg::ref_ptrosg::Image image = new osg::Image;

image-readPixels. example

if (osgDB::writeImageFile(*image,_filename))

{

std::cout  Saved screen image to `_filename` std::endl;

}

2009/8/25 Peter Wraae Marino osgh...@gmail.com

Hi osgUsers,

I have a question about texture to file. Currently I have render to
texture (RTT) and would like to save this texture to a file. Is there
a straight forward method of doing this?

anyone?

--
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
___
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--
Maxim Gammer


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--
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
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--
Rafael Gaitán Linares
Instituto de Automática e Informática Industrial  http://www.ai2.upv.es
Ciudad Politécnica de la Innovación
Universidad Politécnica de Valencia
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--
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site







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The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html.


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Re: [osg-users] texture to file

2009-08-27 Thread J.P. Delport


Hi,

Peter Wraae Marino wrote:

Hi osgUsers,

I'm still battling with the luminance texture to file.
The problem is I need to save a texture with 32bit floating point
value for each pixel in the texture
as a file and load it in at a later time. (16bit can also be used if
32bit isn't supported).

I have tried all these combinations:

m_rImage = new osg::Image;
//m_rImage-allocateImage( 1024, 1024, 1, GL_LUMINANCE, GL_BYTE );   // 
fails
//m_rImage-allocateImage( 1024, 1024, 8, GL_LUMINANCE, GL_BYTE );   // 
fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_BYTE );  // 
fails
//m_rImage-allocateImage( 1024, 1024, 16, GL_LUMINANCE, GL_FLOAT ); // fails
//m_rImage-allocateImage( 1024, 1024, 32, GL_LUMINANCE, GL_FLOAT ); // fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_4_BYTES
);  // fails with crash
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_BYTE );   
 //
works ( image 8bit in each RGB )
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_FLOAT );  
 //
works ( image 8bit in each RGB ), but all values zero
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_4_BYTES ); //
fails with crash
//m_rImage-allocateImage( 1024, 1024, 32, GL_RED, GL_FLOAT );  
 //
works, but fails when writing image to file


mmm, I think the third parameter of allocateImage is the depth, as in 
for a 3D texture, not bit depth. So for a 2D image should always be 1.


jp

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The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html.


This message has been scanned for viruses and dangerous content by MailScanner, 
and is believed to be clean.  MailScanner thanks Transtec Computers for their support.


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Re: [osg-users] texture to file

2009-08-27 Thread Peter Wraae Marino

Hi jp,

If I was to post the entire render setup it would be so big.. but I'll
try and break it up into pseudo form:

-osg::Camera setSourceType GL_FLOAT
-osg::Camera setInternalFormat GL_LUMINANCE32F_ARB
-osg::Camera detaches osg::Camera::COLOR_BUFFER
-osg::Camera attaches osg:::Camera::COLOR_BUFFER with osg::Image
-the RTT uses the above camera to render an image
-use osgDB::writeImageFile using image as input and file test.png

png supports 16bit grayscale

hope this helps,
Peter




On Thu, Aug 27, 2009 at 10:01 AM, J.P. Delportjpdelp...@csir.co.za wrote:
 What format are you trying to write the file to? How are you attaching the
 image to your camera? i.e. where are the luminance values coming from?

 jp

 Peter Wraae Marino wrote:

 Hi osgUsers,

 I'm still battling with the luminance texture to file.
 The problem is I need to save a texture with 32bit floating point
 value for each pixel in the texture
 as a file and load it in at a later time. (16bit can also be used if
 32bit isn't supported).

 I have tried all these combinations:

 m_rImage = new osg::Image;
 //m_rImage-allocateImage( 1024, 1024, 1, GL_LUMINANCE, GL_BYTE );
      // fails
 //m_rImage-allocateImage( 1024, 1024, 8, GL_LUMINANCE, GL_BYTE );
      // fails
 //m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_BYTE );
       // fails
 //m_rImage-allocateImage( 1024, 1024, 16, GL_LUMINANCE, GL_FLOAT );    //
 fails
 //m_rImage-allocateImage( 1024, 1024, 32, GL_LUMINANCE, GL_FLOAT );    //
 fails
 //m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_4_BYTES
 );      // fails with crash
 //m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_BYTE );
       //
 works ( image 8bit in each RGB )
 //m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_FLOAT );
      //
 works ( image 8bit in each RGB ), but all values zero
 //m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_4_BYTES );
      //
 fails with crash
 //m_rImage-allocateImage( 1024, 1024, 32, GL_RED, GL_FLOAT );
      //
 works, but fails when writing image to file

 the only one that gave anykind of result was the GL_RGB, GL_BYTE ...
 am I missing something?

 anyone?

 Peter

 On Wed, Aug 26, 2009 at 1:57 PM, Peter Wraae Marinoosgh...@gmail.com
 wrote:

 Hi Rafa,

 thanks.. i used your suggestion and it works.

 my only problem now is that the RTT i have created generates a
 GL_LUMINANCE image,
 which format do I use?

 I would like to load and use this texture again as luminance texture.

 any suggestions,
 Peter

 On Tue, Aug 25, 2009 at 12:25 PM, Rafa Gaitanrafa.gai...@gmail.com
 wrote:

 Hi Peter

 You can attach an image to the camera doing the rtt.

 osg::Image *image = new osg::Image;
 image-allocateImage(tex_width, tex_height, 1, GL_RGBA,
 GL_UNSIGNED_BYTE);

 // attach the image so its copied on each frame.
 camera-attach(osg::Camera::COLOR_BUFFER, image);

 Rafa.



 On Tue, Aug 25, 2009 at 12:22 PM, Peter Wraae Marinoosgh...@gmail.com
 wrote:

 Hi Maxim ,

 I believe the readPixels is reading from the framebuffer and not the
 texture (or am I mistaken??)
 remember a RTT usually means I have 2 or more cameras in my scene...
 where one is used
 to do the RTT... so this can lead to a question how would osg::Image
 know which buffer to read from?

 Peter

 On Tue, Aug 25, 2009 at 12:16 PM, Maxim Gammermaxgam...@gmail.com
 wrote:

 Hi...

 osg::ref_ptrosg::Image image = new osg::Image;

 image-readPixels. example

 if (osgDB::writeImageFile(*image,_filename))

 {

 std::cout  Saved screen image to `_filename` std::endl;

 }

 2009/8/25 Peter Wraae Marino osgh...@gmail.com

 Hi osgUsers,

 I have a question about texture to file. Currently I have render to
 texture (RTT) and would like to save this texture to a file. Is there
 a straight forward method of doing this?

 anyone?

 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org

 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org


 --
 Maxim Gammer


 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org

 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org




 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org

 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org



 --
 Rafael Gaitán Linares
 Instituto de Automática e Informática Industrial  http://www.ai2.upv.es
 Ciudad Politécnica de la Innovación
 Universidad Politécnica de Valencia
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org

 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org



 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site





 --

Re: [osg-users] texture to file

2009-08-27 Thread J.P. Delport


Hi,

sorry, more questions...

Peter Wraae Marino wrote:

Hi jp,

If I was to post the entire render setup it would be so big.. but I'll
try and break it up into pseudo form:

-osg::Camera setSourceType GL_FLOAT


you mean you set this on the camera's attached texture?


-osg::Camera setInternalFormat GL_LUMINANCE32F_ARB
-osg::Camera detaches osg::Camera::COLOR_BUFFER


why the detach?


-osg::Camera attaches osg:::Camera::COLOR_BUFFER with osg::Image


you can have a texture and image attached. If you view the texture with 
the main OSG camera, are the values what you expect?



-the RTT uses the above camera to render an image
-use osgDB::writeImageFile using image as input and file test.png

png supports 16bit grayscale


try tiff, it supports luminance with 32-bit float.

jp



hope this helps,
Peter




On Thu, Aug 27, 2009 at 10:01 AM, J.P. Delportjpdelp...@csir.co.za wrote:

What format are you trying to write the file to? How are you attaching the
image to your camera? i.e. where are the luminance values coming from?

jp

Peter Wraae Marino wrote:

Hi osgUsers,

I'm still battling with the luminance texture to file.
The problem is I need to save a texture with 32bit floating point
value for each pixel in the texture
as a file and load it in at a later time. (16bit can also be used if
32bit isn't supported).

I have tried all these combinations:

m_rImage = new osg::Image;
//m_rImage-allocateImage( 1024, 1024, 1, GL_LUMINANCE, GL_BYTE );
 // fails
//m_rImage-allocateImage( 1024, 1024, 8, GL_LUMINANCE, GL_BYTE );
 // fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_BYTE );
  // fails
//m_rImage-allocateImage( 1024, 1024, 16, GL_LUMINANCE, GL_FLOAT );//
fails
//m_rImage-allocateImage( 1024, 1024, 32, GL_LUMINANCE, GL_FLOAT );//
fails
//m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_4_BYTES
);  // fails with crash
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_BYTE );
  //
works ( image 8bit in each RGB )
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_FLOAT );
 //
works ( image 8bit in each RGB ), but all values zero
//m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_4_BYTES );
 //
fails with crash
//m_rImage-allocateImage( 1024, 1024, 32, GL_RED, GL_FLOAT );
 //
works, but fails when writing image to file

the only one that gave anykind of result was the GL_RGB, GL_BYTE ...
am I missing something?

anyone?

Peter

On Wed, Aug 26, 2009 at 1:57 PM, Peter Wraae Marinoosgh...@gmail.com
wrote:

Hi Rafa,

thanks.. i used your suggestion and it works.

my only problem now is that the RTT i have created generates a
GL_LUMINANCE image,
which format do I use?

I would like to load and use this texture again as luminance texture.

any suggestions,
Peter

On Tue, Aug 25, 2009 at 12:25 PM, Rafa Gaitanrafa.gai...@gmail.com
wrote:

Hi Peter

You can attach an image to the camera doing the rtt.

osg::Image *image = new osg::Image;
image-allocateImage(tex_width, tex_height, 1, GL_RGBA,
GL_UNSIGNED_BYTE);

// attach the image so its copied on each frame.
camera-attach(osg::Camera::COLOR_BUFFER, image);

Rafa.



On Tue, Aug 25, 2009 at 12:22 PM, Peter Wraae Marinoosgh...@gmail.com
wrote:

Hi Maxim ,

I believe the readPixels is reading from the framebuffer and not the
texture (or am I mistaken??)
remember a RTT usually means I have 2 or more cameras in my scene...
where one is used
to do the RTT... so this can lead to a question how would osg::Image
know which buffer to read from?

Peter

On Tue, Aug 25, 2009 at 12:16 PM, Maxim Gammermaxgam...@gmail.com
wrote:

Hi...

osg::ref_ptrosg::Image image = new osg::Image;

image-readPixels. example

if (osgDB::writeImageFile(*image,_filename))

{

std::cout  Saved screen image to `_filename` std::endl;

}

2009/8/25 Peter Wraae Marino osgh...@gmail.com

Hi osgUsers,

I have a question about texture to file. Currently I have render to
texture (RTT) and would like to save this texture to a file. Is there
a straight forward method of doing this?

anyone?

--
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
___
osg-users mailing list
osg-users@lists.openscenegraph.org

http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org


--
Maxim Gammer


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--
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
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--
Rafael Gaitán Linares
Instituto de Automática e Informática Industrial  http://www.ai2.upv.es
Ciudad Politécnica de la Innovación
Universidad Politécnica de Valencia
___
osg-users

Re: [osg-users] texture to file

2009-08-27 Thread Engvall Åsa

Try to use 
m_rImage-setInternalTextureFormat(GL_LUMINANCE32F_ARB);  

Åsa

-Ursprungligt meddelande-
Från: osg-users-boun...@lists.openscenegraph.org 
[mailto:osg-users-boun...@lists.openscenegraph.org] För J.P. Delport
Skickat: den 27 augusti 2009 10:50
Till: OpenSceneGraph Users
Ämne: Re: [osg-users] texture to file


Hi,

Peter Wraae Marino wrote:
 Hi osgUsers,
 
 I'm still battling with the luminance texture to file.
 The problem is I need to save a texture with 32bit floating point 
 value for each pixel in the texture as a file and load it in at a 
 later time. (16bit can also be used if 32bit isn't supported).
 
 I have tried all these combinations:
 
 m_rImage = new osg::Image;
 //m_rImage-allocateImage( 1024, 1024, 1, GL_LUMINANCE, GL_BYTE );
 // fails
 //m_rImage-allocateImage( 1024, 1024, 8, GL_LUMINANCE, GL_BYTE );
 // fails
 //m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_BYTE );   
 // fails
 //m_rImage-allocateImage( 1024, 1024, 16, GL_LUMINANCE, GL_FLOAT );  // fails
 //m_rImage-allocateImage( 1024, 1024, 32, GL_LUMINANCE, GL_FLOAT );  // fails
 //m_rImage-allocateImage( 1024, 1024, 24, GL_LUMINANCE, GL_4_BYTES
 );// fails with crash
 //m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_BYTE ); 
 //
 works ( image 8bit in each RGB )
 //m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_FLOAT );
 //
 works ( image 8bit in each RGB ), but all values zero
 //m_rImage-allocateImage( 1024, 1024, 24, GL_RGB, GL_4_BYTES );  
 //
 fails with crash
 //m_rImage-allocateImage( 1024, 1024, 32, GL_RED, GL_FLOAT );
 //
 works, but fails when writing image to file

mmm, I think the third parameter of allocateImage is the depth, as in for a 3D 
texture, not bit depth. So for a 2D image should always be 1.

jp

--
This message is subject to the CSIR's copyright terms and conditions, e-mail 
legal notice, and implemented Open Document Format (ODF) standard. 
The full disclaimer details can be found at 
http://www.csir.co.za/disclaimer.html.

This message has been scanned for viruses and dangerous content by MailScanner, 
and is believed to be clean.  MailScanner thanks Transtec Computers for their 
support.

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Re: [osg-users] texture to file

2009-08-26 Thread Peter Wraae Marino

Hi Rafa,

thanks.. i used your suggestion and it works.

my only problem now is that the RTT i have created generates a
GL_LUMINANCE image,
which format do I use?

I would like to load and use this texture again as luminance texture.

any suggestions,
Peter

On Tue, Aug 25, 2009 at 12:25 PM, Rafa Gaitanrafa.gai...@gmail.com wrote:
 Hi Peter

 You can attach an image to the camera doing the rtt.

 osg::Image *image = new osg::Image;
 image-allocateImage(tex_width, tex_height, 1, GL_RGBA, GL_UNSIGNED_BYTE);

 // attach the image so its copied on each frame.
 camera-attach(osg::Camera::COLOR_BUFFER, image);

 Rafa.



 On Tue, Aug 25, 2009 at 12:22 PM, Peter Wraae Marinoosgh...@gmail.com wrote:
 Hi Maxim ,

 I believe the readPixels is reading from the framebuffer and not the
 texture (or am I mistaken??)
 remember a RTT usually means I have 2 or more cameras in my scene...
 where one is used
 to do the RTT... so this can lead to a question how would osg::Image
 know which buffer to read from?

 Peter

 On Tue, Aug 25, 2009 at 12:16 PM, Maxim Gammermaxgam...@gmail.com wrote:
 Hi...

 osg::ref_ptrosg::Image image = new osg::Image;

 image-readPixels. example

 if (osgDB::writeImageFile(*image,_filename))

 {

 std::cout  Saved screen image to `_filename` std::endl;

 }

 2009/8/25 Peter Wraae Marino osgh...@gmail.com

 Hi osgUsers,

 I have a question about texture to file. Currently I have render to
 texture (RTT) and would like to save this texture to a file. Is there
 a straight forward method of doing this?

 anyone?

 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org



 --
 Maxim Gammer


 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org





 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org




 --
 Rafael Gaitán Linares
 Instituto de Automática e Informática Industrial  http://www.ai2.upv.es
 Ciudad Politécnica de la Innovación
 Universidad Politécnica de Valencia
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org




-- 
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
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[osg-users] texture to file

2009-08-25 Thread Peter Wraae Marino

Hi osgUsers,

I have a question about texture to file. Currently I have render to
texture (RTT) and would like to save this texture to a file. Is there
a straight forward method of doing this?

anyone?

-- 
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
___
osg-users mailing list
osg-users@lists.openscenegraph.org
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Re: [osg-users] texture to file

2009-08-25 Thread Maxim Gammer

Hi...

osg::ref_ptrosg::Image image = new osg::Image;

image-readPixels. example

if (osgDB::writeImageFile(*image,_filename))

{

std::cout  Saved screen image to `_filename` std::endl;

}


2009/8/25 Peter Wraae Marino osgh...@gmail.com

 Hi osgUsers,

 I have a question about texture to file. Currently I have render to
 texture (RTT) and would like to save this texture to a file. Is there
 a straight forward method of doing this?

 anyone?

 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org




-- 
Maxim Gammer
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Re: [osg-users] texture to file

2009-08-25 Thread Peter Wraae Marino

Hi Maxim ,

I believe the readPixels is reading from the framebuffer and not the
texture (or am I mistaken??)
remember a RTT usually means I have 2 or more cameras in my scene...
where one is used
to do the RTT... so this can lead to a question how would osg::Image
know which buffer to read from?

Peter

On Tue, Aug 25, 2009 at 12:16 PM, Maxim Gammermaxgam...@gmail.com wrote:
 Hi...

 osg::ref_ptrosg::Image image = new osg::Image;

 image-readPixels. example

 if (osgDB::writeImageFile(*image,_filename))

 {

 std::cout  Saved screen image to `_filename` std::endl;

 }

 2009/8/25 Peter Wraae Marino osgh...@gmail.com

 Hi osgUsers,

 I have a question about texture to file. Currently I have render to
 texture (RTT) and would like to save this texture to a file. Is there
 a straight forward method of doing this?

 anyone?

 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org



 --
 Maxim Gammer


 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org





-- 
Regards,
Peter Wraae Marino

www.osghelp.com - OpenSceneGraph support site
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

Re: [osg-users] texture to file

2009-08-25 Thread Rafa Gaitan

Hi Peter

You can attach an image to the camera doing the rtt.

osg::Image *image = new osg::Image;
image-allocateImage(tex_width, tex_height, 1, GL_RGBA, GL_UNSIGNED_BYTE);

// attach the image so its copied on each frame.
camera-attach(osg::Camera::COLOR_BUFFER, image);

Rafa.



On Tue, Aug 25, 2009 at 12:22 PM, Peter Wraae Marinoosgh...@gmail.com wrote:
 Hi Maxim ,

 I believe the readPixels is reading from the framebuffer and not the
 texture (or am I mistaken??)
 remember a RTT usually means I have 2 or more cameras in my scene...
 where one is used
 to do the RTT... so this can lead to a question how would osg::Image
 know which buffer to read from?

 Peter

 On Tue, Aug 25, 2009 at 12:16 PM, Maxim Gammermaxgam...@gmail.com wrote:
 Hi...

 osg::ref_ptrosg::Image image = new osg::Image;

 image-readPixels. example

 if (osgDB::writeImageFile(*image,_filename))

 {

 std::cout  Saved screen image to `_filename` std::endl;

 }

 2009/8/25 Peter Wraae Marino osgh...@gmail.com

 Hi osgUsers,

 I have a question about texture to file. Currently I have render to
 texture (RTT) and would like to save this texture to a file. Is there
 a straight forward method of doing this?

 anyone?

 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org



 --
 Maxim Gammer


 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org





 --
 Regards,
 Peter Wraae Marino

 www.osghelp.com - OpenSceneGraph support site
 ___
 osg-users mailing list
 osg-users@lists.openscenegraph.org
 http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org




-- 
Rafael Gaitán Linares
Instituto de Automática e Informática Industrial  http://www.ai2.upv.es
Ciudad Politécnica de la Innovación
Universidad Politécnica de Valencia
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Re: [osg-users] texture to file

Re: [osg-users] texture to file

Re: [osg-users] texture to file

Re: [osg-users] texture to file

Re: [osg-users] texture to file

Re: [osg-users] texture to file

Re: [osg-users] texture to file

[osg-users] texture to file

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Re: [osg-users] texture to file

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