[osg-users] Render to Texture
paul1492 at yahoo.com
paul1492 at yahoo.com
Wed Jul 16 06:46:54 PDT 2008
I'm not sure what is going on but I switched to dumping a "png" file and still see the banding (see attached)...
Are you sure the PNG plugin can handle dumping an RGBA GL_FLOAT image?
All I did was add a osgDB::writeImageFile(*_image, "somefilename.png") at the end of the GL_FLOAT/RGBA if statement in MyCameraPostDrawCallback::operator() in the osgprerender.cpp example and then ran this example using "--image cow.osg".
----- Original Message ----
From: J.P. Delport <jpdelport at csir.co.za>
To: OpenSceneGraph Users <osg-users at lists.openscenegraph.org>
Sent: Tuesday, July 15, 2008 8:11:14 AM
Subject: Re: [osg-users] Render to Texture
make sure the image writer can handle your image format. Bands usually
mean an alignment error in the data the writer expects. E.g. expects
binary input data to be RGB, but the data is RGBA.
.jpg does not support alpha I think.
paul1492 at yahoo.com wrote:
> I'm attempting to render to a texture and then dump the rendered texture to a file (every frame), but I'm having trouble.
> I've attempted to use the osgprerender example (using the --image option), and replaced the MyCameraPostDrawCallback::operator() to have a
> osgDB::writeImageFile(*_image, fileName);
> where fileName is a ".tif" file (or .jpg file).
> When I look at the .tif file using the Linux "display" program, I get some funny banded image. What am I doing wrong?
> Is there a more efficient way to get access to the rendered image? Must I allocate an "image" array to the texture to access the image?
> Paul P.
> osg-users mailing list
> osg-users at lists.openscenegraph.org
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