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. Delport<jpdelp...@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 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
>>>
>>
>>
>>
>
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--
Regards,
Peter Wraae Marino
www.osghelp.com - OpenSceneGraph support site
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