Re: [PyOpenGL-Users] gluBuild3DMipmaps

[JoN <jo...@we...>]

Don't hold your breath sorry Andrew, I've shifted jobs and all my previous stuff
is archived :(
I'll try and dig it out.

The NeHe tutorials and anything on GLSL are good places to start.
Also the Python ctypes cookbook people made a really nice little shader demo in
python that is very fast, so googling may help.

Jon


Quoting Andrew Wilson <and...@al...>:

> Hey Jon,
>   Would you mind sharing your GLSL shaders program?  Also, I seemed to have
> cleared up my 3d texture problem by installing glewpy, don't know why this
> fixed it but it just started working...
>   Thanks
>   Andrew
> 
> 
> On 2/11/07, JoN <jo...@we...> wrote:
> >
> >
> > Ah, you are another poor fool like me, interested in 3D textures.
> > Their support is extremely patchy across different drivers (then there is
> > the
> > _vtc compression issue too!).
> >
> > Sorry I realize this email isn't particularly helpful but be warned: 3D
> > textures
> > are another world of pain/can of worms again in terms of getting access to
> > them,
> > you have another hill to climb!
> >
> > I'm doing some stuff at the moment that is working, using GLSL shaders and
> > 2D
> > textures that pretend to be 3D textures (eg. one 512x512 2D texture can
> > contain
> > 64 (that's 8x8 squares) x 64texel-by-64texel squares, so you can have a 3D
> > texture that is 64 slices deep, with each slice a 64x64 texture).  This
> > turns
> > out to be very quick if you program your fragment shaders right and use
> > the
> > built-in stuff (I'm on Nvidia), plus you get the added advantage that 2D
> > textures and 2D texture _compression_ is fully supported everywhere with
> > no ifs
> > or buts.
> >
> > More fud for thot.
> >
> > Jon
> >
> >
> > Quoting Andrew Wilson <and...@al...>:
> >
> > > Hello,
> > >   Great hack, got it working no problem now.  One side question,
> > > gluBuild3DMipmaps works without a hitch, but when I call
> > bool(glTexImage3D)
> > > I get "False" back. glGetString(GL_VERSION) returns 2.0.1 so supposedly
> > > teximage3d is supported on gl > 1.2.  Am I missing something here?
> > >   Thanks
> > >   Andrew
> > >
> > >
> > > On 2/9/07, Mike C. Fletcher <mcf...@vr...> wrote:
> > > >
> > > > Andrew Wilson wrote:
> > > > > Hello,
> > > > >   I found a newer glu version compiled for win32.  Unfortunately
> > winxp
> > > > > has a file protection scheme that won't allow me to overwrite
> > > > > glu32.dll with the newer version.  Is there a way to force pyopengl
> > to
> > > > > use different dll's?
> > > > There is, though it feels a bit hacky and has AFAIK never been tested.
> > > > Here's an example where I make the GLU DLL a completely unrelated
> > > > library (so there will be no GLU functionality at all):
> > > >
> > > > >>> import ctypes
> > > > >>> glu = ctypes.CDLL( '/usr/lib/libFLAC.so' )
> > > > >>> platform.GLU = glu
> > > > >>> from OpenGL.GLU import *
> > > > >>> gluGetString
> > > > <OpenGL.platform.gluGetString object at 0x2aaaabc82f10>
> > > > >>> gluGetString( GLU_VERSION )
> > > > Traceback (most recent call last):
> > > >   File "<stdin>", line 1, in <module>
> > > >   File
> > > >
> > "/var/pylive/src/OpenGL-dev/OpenGL-ctypes/OpenGL/platform/__init__.py",
> > > > line 186, in __call__
> > > >     self.__name__, self.__name__,
> > > > OpenGL.error.NullFunctionError: Attempt to call an undefined function
> > > > gluGetString, check for bool(gluGetString) before calling
> > > >
> > > > (You will need to use WinDLL, not CDLL for win32).  You may want to
> > use
> > > > OpenGL.platform.ctypesloader.loadLibrary( ctypes.windll,
> > > > path_to_your_library ) instead of the bald ctypes operations, as older
> > > > ctypes versions should be supported with that function.
> > > >
> > > > Good luck,
> > > > Mike
> > > >
> > > > >
> > > > > On 2/8/07, *Andrew Wilson* <and...@al...
> > > > > <mailto:and...@al...>> wrote:
> > > > >
> > > > >     Hey Mike,
> > > > >       You hit the nail on the head, my version of GLU is '1.2.2.0
> > > > >     <http://1.2.2.0> Microsoft Corporation'. This may be a silly
> > > > >     question, is there any way to update glu to 1.3 on win32?
> > > > >       Thanks
> > > > >       Andrew
> > > > >
> > > >
> > > > --
> > > > ________________________________________________
> > > >   Mike C. Fletcher
> > > >   Designer, VR Plumber, Coder
> > > >   http://www.vrplumber.com
> > > >   http://blog.vrplumber.com
> > > >
> > > >
> > >
> >
> >
> >
> >
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