Hi,
I haven't read your code, but I'm sure alpha channel works just fine.
Attached is a modified osgmultiplerendertargets example. Run it with
osgmultiplerendertargets --image
which should print a=128
or with
osgmultiplerendertargets --hdr --image
which should print a=-1.1
You can adjust the values in gl_FragData[0].
rgds
jp
Steven Powers wrote:
danielh wrote:
Try attaching a texture to the COLOR_BUFFER0 instead of an image directly.
That's what worked for me.
Thats what this code is doing. I've written to COLOR_BUFFER0 and whenever I
change the shader alpha value to something other than 1 all color values come
back incorrect.
This will be read correctly:
Code:
gl_FragColor = vec4(1,2,3,4, 1);
But this will be read incorrectly:
Code:
gl_FragColor = vec4(1,2,3,4, .5);
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=8707#8707
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