Hi David,
David Spilling wrote:
Brian, JP,
The osgmultiplerendertargets example uses (by default)
GL_FLOAT_RGBA32_NV, rather than either GL_RGBA32F_ARB, or even
GL_RGBA16F_ARB. Could this be a card issue?
Yes, if I remember correctly, at the time I made the example I was
fiddling with various settings. On the card I tested, the
GL_FLOAT_RGBA32_NV was faster than GL_RGBA32F_ARB.
There is no real reason to not use the ARB formats. I'll submit a
modified example with the NV options commented out and documented.
I would be interested to know whether this example works for you if you
change to GL_RGBA32F_ARB or GL_RGBA16F_ARB. I admit, I haven't tried it
myself yet - and now intend to - but certainly in my own app (on ATI), I
have had issues with GL_RGBA16F_ARB and GL_FLOAT in the past. Things
might be better now.
I know GL_RGBA32F_ARB and GL_FLOAT work fine, we use it all the time on
NVidia 8-series and up.
I've just tested GL_RGBA16F_ARB with GL_FLOAT and it works fine after I
replaced all e-12 and e12 with e-3 and e3. This is on GeForce 7400Go.
jp
David
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