Hello Alfonso,
I don't know how to do it. I want to disable this option because when
these road textures are first "seen" by the camera, the program stops
for a moment to scale them to the power of two and it is quite rough.
You have a few options, and not all of them are disabling that hint...
1. Of course, you can ask your modelers to use powers of two in texture
sizes.
2. You can use osgconv to do the resize offline (osgconv in.osg
out.osg). The resulting model will be the same thing that you get when
it's done at run time, but the program won't need to scale the textures,
they'll already be scaled. You can even take this opportunity to make
other things more efficient, like if you choose .ive as your output
format the loading will likely take less time, and if you use the
--compressed argument you'll get compressed textures that take less
texture memory on the video card.
These two options are good because they don't force you to use video
cards that support NPOT textures. These are quite common now, but if you
have a wide user/customer base (or you want to) then you want to support
as wide an array of hardware as possible, and using POT textures is one
factor in that.
3. If you really want to disable the resizeNPOTHint, you need to write a
visitor that you'll run just after loading a model. This visitor will
traverse the loaded graph and for each node and drawable, check if the
stateset contains a texture, and if so disable the hint. No such visitor
exists right now, but you can take inspiration from the
osgUtil::Optimizer::TextureVisitor which does this for other texture
settings.
I was planning on extending osgUtil::Optimizer::TextureVisitor to
support this option sometime, but it's a "wish list" item so it could
take some time for me to get to it. If you want to do something like
that, I encourage you to do it there and submit the modified files so
that all could have this added capability in a future version of OSG.
Hope this helps,
J-S
--
______________________________________________________
Jean-Sebastien Guay [email protected]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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