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 Marino<osgh...@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 Gaitan<rafa.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 Marino<osgh...@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 Gammer<maxgam...@gmail.com> wrote:
>>>> Hi...
>>>>
>>>> osg::ref_ptr<osg::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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