Hi,
are you sure your hardware supports 32-bit blending? What card/drivers
are you using?
We've tried identifying the effective resolution of blending on various
cards. I don't have the results handy, will try to get them.
jp
[email protected] wrote:
Hi, I’m using the osgViewer ::Viewer to perform floating point rendering
in an FBO and I have a problem when blending is enabled. My blending
function is defined by GL_ONE_MINUS_SRC_ALPHA for destination and GL_ONE
for source. The problem occurs when I draw a facet with a small color in
front of a facet with a big color. For example lets define:
Rd = (0.2, 0.0, 0.0, 1.0) // RGBA
Rs = (6e-9, 0.0, 0.0, 1.0) //RGBA
In theory I was expecting to get:
Rd = Rs + (1-As)Rd
Rd = 6e-9 + (1-1)*0.2
Rd = 6e-9 +(0)*0.2 = 6e-9
but I get1.7920927e-8
Does someone have an idea what is going on? I currently using the
GL_FLOAT_RGBA32_NV format as internal format of my attached texture. I
have also tried the GL_FLOAT_RGBA16_NV, GL_RGBA32F_ARB, GL_RGBA16F_ARB
and I always get the same kind of results. Tell me if you need part of
my code in order to help me.
Thank you
Jonathan
------------------------------------------------------------------------
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
--
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.
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
