pyopengl-users — Discussion of all PyOpenGL matters.

Re: [PyOpenGL-Users] py2exe and pyopengl?

[Dan H. <Dan...@no...>]

Craig Berry wrote:
> Thanks, Jef and Dan.  I'm a bit perturbed that this is so messy; it
> has the smell of something that will break every time the slightest
> change happens to any of the involved components.  I'm wondering
> whether Python is really suited to production OpenGL use, which is
> sad, as I've really been enjoying working in it.

Honestly, I find the state of Python packaging (py2exe/py2app) pretty 
sad, regardless of whether you're using PyOpenGL. However if you can get 
past difficulties with the packaging, Python is really nice for 
production use.. Even for graphics software.

Dan

Re: [PyOpenGL-Users] py2exe and pyopengl?

[Craig B. <cd...@gm...>]

Thanks, Jef and Dan.  I'm a bit perturbed that this is so messy; it
has the smell of something that will break every time the slightest
change happens to any of the involved components.  I'm wondering
whether Python is really suited to production OpenGL use, which is
sad, as I've really been enjoying working in it.

On Tue, Feb 16, 2010 at 10:27, Dan Helfman <Dan...@no...> wrote:
> Jef Mangelschots wrote:
>> please check out my previous posting called "HOWTO freeze PyOpenGL
>> programs with py2exe":
>> http://sourceforge.net/mailarchive/message.php?msg_name=eb8474fe0911100101u9dd7d24ibd1c56f2b2c1599e%40mail.gmail.com
>> hope this helps.
>
> One further variation of Jef's instructions: You can programmatically
> copy the OpenGL directory to "dist" via your setup.py so that you don't
> have to copy it manually each time. Here's an example using
> shutil.copytree():
>
>
> # Since the ignore keyword was introduced in Python 2.6, include a
> # fall-back for Python 2.5.
> try:
>   shutil.copytree(
>     opengl_dir, os.path.join( "dist", "OpenGL" ),
>     ignore = shutil.ignore_patterns( "*.py", "*.pyc", "GLUT", "Tk" ),
>   )
> except TypeError:
>   shutil.copytree( opengl_dir, os.path.join( "dist", "OpenGL" ) )
>
>
> This is from:
>
>   http://bitbucket.org/dhelfman/maproom/src/tip/setup.py#cl-190
>
> I didn't say it was pretty. :)
>
> Dan
>
> ------------------------------------------------------------------------------
> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
> http://p.sf.net/sfu/solaris-dev2dev
> _______________________________________________
> PyOpenGL Homepage
> http://pyopengl.sourceforge.net
> _______________________________________________
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>



-- 
Craig Berry - http://www.cine.net/~cberry/
"Lots of things in the universe don’t solve any problems, and
nevertheless exist."  -- Sean Carroll

Re: [PyOpenGL-Users] py2exe and pyopengl?

[Dan H. <Dan...@no...>]

Jef Mangelschots wrote:
> please check out my previous posting called "HOWTO freeze PyOpenGL 
> programs with py2exe":
> http://sourceforge.net/mailarchive/message.php?msg_name=eb8474fe0911100101u9dd7d24ibd1c56f2b2c1599e%40mail.gmail.com
> hope this helps.

One further variation of Jef's instructions: You can programmatically 
copy the OpenGL directory to "dist" via your setup.py so that you don't 
have to copy it manually each time. Here's an example using 
shutil.copytree():


# Since the ignore keyword was introduced in Python 2.6, include a
# fall-back for Python 2.5.
try:
   shutil.copytree(
     opengl_dir, os.path.join( "dist", "OpenGL" ),
     ignore = shutil.ignore_patterns( "*.py", "*.pyc", "GLUT", "Tk" ),
   )
except TypeError:
   shutil.copytree( opengl_dir, os.path.join( "dist", "OpenGL" ) )


This is from:

   http://bitbucket.org/dhelfman/maproom/src/tip/setup.py#cl-190

I didn't say it was pretty. :)

Dan

Re: [PyOpenGL-Users] py2exe and pyopengl?

[Jef M. <jef...@gm...>]

please check out my previous posting called "HOWTO freeze PyOpenGL programs
with py2exe":
http://sourceforge.net/mailarchive/message.php?msg_name=eb8474fe0911100101u9dd7d24ibd1c56f2b2c1599e%40mail.gmail.com
hope this helps.



On Mon, Feb 15, 2010 at 11:27 PM, Craig Berry <cd...@gm...> wrote:

> I'm trying to use py2exe to package a python program which uses
> pyopengl.  There's a lot of contradictory information on the web about
> how to accomplish this.  Can anyone provide or point me to a
> definitive recipe for this using Python 2.6, the most recent py2exe,
> and PyOpenGL_accelerate-3.0.1b2-py2.6-win32 ?
>
> --
> Craig Berry - http://www.cine.net/~cberry/<http://www.cine.net/%7Ecberry/>
> "Lots of things in the universe don’t solve any problems, and
> nevertheless exist."  -- Sean Carroll
>
>
> ------------------------------------------------------------------------------
> SOLARIS 10 is the OS for Data Centers - provides features such as DTrace,
> Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW
> http://p.sf.net/sfu/solaris-dev2dev
> _______________________________________________
> PyOpenGL Homepage
> http://pyopengl.sourceforge.net
> _______________________________________________
> PyOpenGL-Users mailing list
> PyO...@li...
> https://lists.sourceforge.net/lists/listinfo/pyopengl-users
>

[PyOpenGL-Users] py2exe and pyopengl?

[Craig B. <cd...@gm...>]

I'm trying to use py2exe to package a python program which uses
pyopengl.  There's a lot of contradictory information on the web about
how to accomplish this.  Can anyone provide or point me to a
definitive recipe for this using Python 2.6, the most recent py2exe,
and PyOpenGL_accelerate-3.0.1b2-py2.6-win32 ?

-- 
Craig Berry - http://www.cine.net/~cberry/
"Lots of things in the universe don’t solve any problems, and
nevertheless exist."  -- Sean Carroll

Re: [PyOpenGL-Users] Missing GLUT font values?

[Craig B. <cd...@gm...>]

It turns out these are actually available at runtime; my IDE (pydev
under eclipse) was complaining about their not being available during
static code analysis, but apparently they pop into existence at
runtime.  I solved the complaining-IDE problem by using the fully
qualified name for the constant: OpenGL.GLUT.GLUT_BITMAP_HELVETICA_10.

On Sat, Feb 13, 2010 at 12:47, Craig Berry <cd...@gm...> wrote:
> I'm trying to use glutBitmapCharacter.  All the examples show font
> constants like GLUT_BITMAP_HELVETICA_10 being available from
> OpenGL.GLUT, but when I try to use these I get a symbol-not-found
> compile error.  Am I missing something?
>
> --
> Craig Berry - http://www.cine.net/~cberry/
> "Lots of things in the universe don’t solve any problems, and
> nevertheless exist."  -- Sean Carroll
>



-- 
Craig Berry - http://www.cine.net/~cberry/
"Lots of things in the universe don’t solve any problems, and
nevertheless exist."  -- Sean Carroll

[PyOpenGL-Users] Missing GLUT font values?

[Craig B. <cd...@gm...>]

I'm trying to use glutBitmapCharacter.  All the examples show font
constants like GLUT_BITMAP_HELVETICA_10 being available from
OpenGL.GLUT, but when I try to use these I get a symbol-not-found
compile error.  Am I missing something?

-- 
Craig Berry - http://www.cine.net/~cberry/
"Lots of things in the universe don’t solve any problems, and
nevertheless exist."  -- Sean Carroll

Re: [PyOpenGL-Users] Mouse wheel events?

[Nicolas R. <Nic...@lo...>]

It depends on the glut version you're using on your system. Freeglut is able to catch these events while regular glut on macosx cannot without a patch.


Nicolas


On Feb 8, 2010, at 06:57 , Craig Berry wrote:

> Can someone please tell me if there's a way to do this, or answer
> definitively that there is no way?  I have a design in progress that
> could really use mousewheel control, and I don't want to settle for
> Plan B until I know Plan A is impossible. :)
> 
> On Fri, Feb 5, 2010 at 19:48, Craig Berry <cd...@gm...> wrote:
>> Is there any way to get mouse wheel events from glut in PyOpenGL?
>> 
>> --
>> Craig Berry - http://www.cine.net/~cberry/
>> "Lots of things in the universe don’t solve any problems, and
>> nevertheless exist."  -- Sean Carroll
>> 
> 
> 
> 
> -- 
> Craig Berry - http://www.cine.net/~cberry/
> "Lots of things in the universe don’t solve any problems, and
> nevertheless exist."  -- Sean Carroll
> 
> ------------------------------------------------------------------------------
> The Planet: dedicated and managed hosting, cloud storage, colocation
> Stay online with enterprise data centers and the best network in the business
> Choose flexible plans and management services without long-term contracts
> Personal 24x7 support from experience hosting pros just a phone call away.
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> _______________________________________________
> PyOpenGL Homepage
> http://pyopengl.sourceforge.net
> _______________________________________________
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> PyO...@li...
> https://lists.sourceforge.net/lists/listinfo/pyopengl-users

Re: [PyOpenGL-Users] Mouse wheel events?

[Craig B. <cd...@gm...>]

Can someone please tell me if there's a way to do this, or answer
definitively that there is no way?  I have a design in progress that
could really use mousewheel control, and I don't want to settle for
Plan B until I know Plan A is impossible. :)

On Fri, Feb 5, 2010 at 19:48, Craig Berry <cd...@gm...> wrote:
> Is there any way to get mouse wheel events from glut in PyOpenGL?
>
> --
> Craig Berry - http://www.cine.net/~cberry/
> "Lots of things in the universe don’t solve any problems, and
> nevertheless exist."  -- Sean Carroll
>



-- 
Craig Berry - http://www.cine.net/~cberry/
"Lots of things in the universe don’t solve any problems, and
nevertheless exist."  -- Sean Carroll

Re: [PyOpenGL-Users] PyOpenGL-Users Digest, Vol 43, Issue 2

[Cata <cat...@gm...>]

Try this code :

import sys
import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GL.EXT.framebuffer_object import *

def draw ():
  glClearColor(0.0,0.0,0.0,0.0)
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
  #draw stuff here
  pygame.display.flip()

pygame.init()
pygame.display.set_mode((512,512),OPENGL | DOUBLEBUF)

#setup a texture
tex = glGenTextures(1);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 512, 512, 0,
GL_RGBA,GL_UNSIGNED_BYTE, None);
glBindTexture(GL_TEXTURE_2D, 0);

#setup teh fbo

framebuffer = glGenFramebuffersEXT(1)
renderbuffer = glGenRenderbuffersEXT(1)

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,framebuffer)
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT,renderbuffer)
glBindTexture(GL_TEXTURE_2D, tex)

glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,GL_DEPTH_COMPONENT,512,512)

glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,GL_DEPTH_ATTACHMENT_EXT,GL_RENDERBUFFER_EXT,renderbuffer)

glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D,tex,0)

glBindRenderbufferEXT(GL_RENDERBUFFER_EXT,0)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,0)
while 1:
 event=pygame.event.poll ()
 if event.type is QUIT:
  sys.exit(0)
 draw()

Re: [PyOpenGL-Users] BUG (?) Exceptions not working?

[Ian M. <geo...@gm...>]

On Sat, Feb 6, 2010 at 5:01 AM, Mike C. Fletcher <mcf...@vr...>wrote:

> Can you tell me platform, card, etceteras?
>
Windows Vista Home Premium (32 bit) (SP2)
Intel Core 2 Duo 2.4 GHz
4 GB RAM
NVIDIA GeForce 8400M GS

Re: [PyOpenGL-Users] BUG (?) Exceptions not working?

[Mike C. F. <mcf...@vr...>]

Ian Mallett wrote:
> Hi,
>
> Just to clarify, the code presented was an excerpt.  I was actually
> using variations with the file attached for testing. 
>
> Interestingly, the code you did /doesn't/ crash for me:
>
> >>> import pygame
> >>> from OpenGL.GL import *
> >>> pygame.init()
> (6, 0)
> >>> pygame.display.set_mode((100,100), pygame.OPENGL)
> <Surface(100x100x32 SW)>
> >>> glViewport(0,0,-800,-800)
> >>> glBegin(GL_QUADS)
> >>> glClear(GL_DEPTH_BUFFER_BIT)
> >>> glEnd()
> >>>
>
> Ideas?
> Thanks,
> Ian
Can you tell me platform, card, etceteras?  That sounds like a bug, if
you've got a context you should be getting the glCheckError() function
running, but there is platform-specific code to guard against getting
protection faults if you call a function before there's a context.  I'm
not likely to get any time to work on PyOpenGL before the conference,
but it's beginning to look like I'll be spending at least one full day
of the sprints on it, so if there are things that need addressing, now's
the time to bring them to my attention.

Take care,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com

Re: [PyOpenGL-Users] BUG (?) Exceptions not working?

[Ian M. <geo...@gm...>]

I tried other versions.  It's the same with all 3.0.0b2 and 3.0.0b8.

I added:
import OpenGL
OpenGL.ERROR_CHECKING = True
OpenGL.ERROR_LOGGING = True
OpenGL.FULL_LOGGING = True
OpenGL.ERROR_ON_COPY = True
to the top of the file, which didn't solve the problem.

Interestingly, the line OpenGL.FULL_LOGGING = True causes (what I assume is
a warning; it's printed red):
No handlers could be found for logger "OpenGL.calltrace"

I couldn't find such a warning anywhere in PyOpenGL.  Does this line help
any?

Thanks,
Ian

[PyOpenGL-Users] Mouse wheel events?

[Craig B. <cd...@gm...>]

Is there any way to get mouse wheel events from glut in PyOpenGL?

-- 
Craig Berry - http://www.cine.net/~cberry/
"Lots of things in the universe don’t solve any problems, and
nevertheless exist."  -- Sean Carroll

Re: [PyOpenGL-Users] BUG (?) Exceptions not working?

[Alejandro S. <as...@gm...>]

Hi Ian,

On Thu, Feb 4, 2010 at 10:03 PM, Ian Mallett <geo...@gm...> wrote:

> Hi,
>
> So I've been trying to debug some code, and it now occurs to me that
> PyOpenGL's method of redirecting OpenGL error flags to the console as
> tracebacks simply isn't working.
>
> Absolute nonsense goes unchallenged:
>
> glClear(GL_BLEND|GL_TEXTURE_2D)
>
> glViewport(0,0,-800,-600)
>
> glBegin(GL_QUADS)
> glClear(GL_DEPTH_BUFFER_BIT)
> glEnd()
>
> etc.
>
> I really REALLY need to be aware of opengl errors to debug various problems
> with framebuffers/shaders/etc.  What's going on?
>
> PyOpenGL 3.0.1b2
>
>
I've noticed that you actually need a valid OpenGL context in order to be
able to detect gl errors. I modified your example slightly and seems to be
throwing errors now:

Negative Viewport dimensions:

>>> import pygame
>>> from OpenGL.GL import *
>>> pygame.init()
(6, 0)
>>> pygame.display.set_mode((100,100), pygame.OPENGL)
<Surface(100x100x32 SW)>
>>> glViewport(0,0,-800,-800)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/site-packages/OpenGL/error.py", line 194, in
glCheckError
    baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
err = 1281,
description = 'invalid value',
baseOperation = glViewport,
cArguments = (0, 0, -800, -800)
)
>>> glViewport(0,0,800,800)

Calling glClear between glBegin()...glEnd() block:

>>> glBegin(GL_QUADS)
>>> glClear(GL_DEPTH_BUFFER_BIT)
>>> glEnd()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/site-packages/OpenGL/GL/exceptional.py", line 55,
in glEnd
    return simple.glEnd( )
  File "/usr/lib/python2.5/site-packages/OpenGL/error.py", line 194, in
glCheckError
    baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
err = 1282,
description = 'invalid operation',
baseOperation = glEnd,
cArguments = ()
)

Let me know how it goes.

Best regards,
Alejandro.-


>
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> Choose flexible plans and management services without long-term contracts
> Personal 24x7 support from experience hosting pros just a phone call away.
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> https://lists.sourceforge.net/lists/listinfo/pyopengl-users
>
>

[PyOpenGL-Users] BUG (?) Exceptions not working?

[Ian M. <geo...@gm...>]

Hi,

So I've been trying to debug some code, and it now occurs to me that
PyOpenGL's method of redirecting OpenGL error flags to the console as
tracebacks simply isn't working.

Absolute nonsense goes unchallenged:

glClear(GL_BLEND|GL_TEXTURE_2D)

glViewport(0,0,-800,-600)

glBegin(GL_QUADS)
glClear(GL_DEPTH_BUFFER_BIT)
glEnd()

etc.

I really REALLY need to be aware of opengl errors to debug various problems
with framebuffers/shaders/etc.  What's going on?

PyOpenGL 3.0.1b2

Thanks,
Ian

Re: [PyOpenGL-Users] Problem attaching Texture to FBO on intel GMA 45000MHD (error when calling glFramebufferTexture2DEXT)

[Ian M. <geo...@gm...>]

They problem may be that you need a renderbuffer.

framebuffer = glGenFramebuffersEXT(1)
renderbuffer = glGenRenderbuffersEXT(1)

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,framebuffer)
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT,renderbuffer)
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT,GL_DEPTH_COMPONENT,
size[0],size[1])

glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,GL_DEPTH_ATTACHMENT_EXT,GL_RENDERBUFFER_EXT,renderbuffer)

glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,attachment,GL_TEXTURE_2D,texture,0)

glBindRenderbufferEXT(GL_RENDERBUFFER_EXT,0)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,0)

Re: [PyOpenGL-Users] Problem attaching Texture to FBO on intel GMA 45000MHD (error when calling glFramebufferTexture2DEXT)

[Gijs <in...@bs...>]

Hello Thomas,

I don't really have a solution for you, but you can use the following 
code to check what PyOpenGL actually does with your calls/data:
import logging
import OpenGL
logging.basicConfig( level = logging.DEBUG )
OpenGL.FULL_LOGGING = True

You might be able to figure out why it gives the error using the output.

Regards, Gijs

On 4-2-2010 22:35, Thomas Hansen wrote:
> I figured out a workaround.  If I disable OpenGL.ERROR_CHECK,
> everything works just fine.  If I get the error code after calling
> glFramebufferTexture2DEXT, it does not return a bad code, but instead
> the expected GL_FRAMEBUFFER_COMPLETE_EXT code.  So I'm guessing there
> is a bug in the error checking somewhere?
>
> It's funky behavior though, and only happens on this laptop (but I've
> tried with all the 3.0>  pyOpenGL version).  Another odd thing is that
> bool(glGenFrameBuffersEXT) returns false, although the function
> clearly exists.
>
> So still not sure exactly why this is happening, but at least it works
> with minor work around (would be nice for debugging if I could get the
> auto ERROR_CHECK to work at teh same time though)
>
> --
> Thomas
>
>
>    

Re: [PyOpenGL-Users] Problem attaching Texture to FBO on intel GMA 45000MHD (error when calling glFramebufferTexture2DEXT)

[Thomas H. <tho...@gm...>]

I figured out a workaround.  If I disable OpenGL.ERROR_CHECK,
everything works just fine.  If I get the error code after calling
glFramebufferTexture2DEXT, it does not return a bad code, but instead
the expected GL_FRAMEBUFFER_COMPLETE_EXT code.  So I'm guessing there
is a bug in the error checking somewhere?

It's funky behavior though, and only happens on this laptop (but I've
tried with all the 3.0 > pyOpenGL version).  Another odd thing is that
bool(glGenFrameBuffersEXT) returns false, although the function
clearly exists.

So still not sure exactly why this is happening, but at least it works
with minor work around (would be nice for debugging if I could get the
auto ERROR_CHECK to work at teh same time though)

--
Thomas



On Thu, Feb 4, 2010 at 12:06 PM, Thomas Hansen <tho...@gm...> wrote:
> Hi everyone,
>
> I using PyOpenGL 3.0.1b2 on Windows 7 on a Dell XT 2 tablet PC
> (http://www.dell.com/tablet). The tablet has a intel GMA  4500MHD
> graphics chip with the newest drivers from intel installed. I'm having
> problems creating a Framebuffer object using pyOpenGL.  The following
> code runs fine on every machine I have access to except for this one.
> I know the graphics chip has FBO support, and have successfully
> compiled and run various C programs using FBO's.
>
> The problem occurs when I call glFramebufferTexture2DEXT, to attach my
> texture to the FBO.  The program crashes and prints a traceback with
> GL error code 1286, which I believe is
> INVALID_FRAMEBUFFER_OPERATION_EXT.
>
> If anyone knows what I am doing wrong, has a workaround, or even just
> a suggestion of identifying the problem better, I would be very
> thankful.
>
> I'm posting a code snippet and the output it produces.  I know teh
> code isnt complete and nothing is actually done with the fbo etc.  but
> its enough to crash the program, and demonstrates the first problem I
> encounter on this machine.
>
> The code:
> =======================================================================
> import pygame
> from pygame.locals import *
> from OpenGL.GL import *
> from OpenGL.GL.EXT.framebuffer_object import *
>
> def draw ():
>   glClearColor(0.0,0.0,0.0,0.0)
>   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
>   #draw stuff here
>   pygame.display.flip()
>
> pygame.init()
> pygame.display.set_mode((512,512),OPENGL | DOUBLEBUF)
>
> #setup a texture
> tex = glGenTextures(1);
> glBindTexture(GL_TEXTURE_2D, tex);
> glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 512, 512, 0, GL_RGBA,
> GL_UNSIGNED_BYTE, None);
> glBindTexture(GL_TEXTURE_2D, 0);
>
> #setup teh fbo
> fbo = glGenFramebuffersEXT(1)
> glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo)
> glBindTexture(GL_TEXTURE_2D, tex)
>
> #this call produces an error!
> glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
> GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D, tex, 0)
>
> while 1:
>  event=pygame.event.poll ()
>  if event.type is QUIT:
>   sys.exit(0)
>  draw()
>
>
> Here is the output:
> ===================================================================
> Traceback (most recent call last):
>  File "test.py", line 29, in <module>
>    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
> GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D, tex, 0)
>  File "C:\Python26\lib\site-packages\pyopengl-3.0.1b2-py2.6-win32.egg\OpenGL\platform\baseplatform.py",
> line 335, in __call__
>    return self( *args, **named )
>  File "C:\Python26\lib\site-packages\pyopengl-3.0.1b2-py2.6-win32.egg\OpenGL\error.py",
> line 208, in glCheckError
>    baseOperation = baseOperation,
> OpenGL.error.GLError: GLError(
>        err = 1286,
>        baseOperation = glFramebufferTexture2DEXT,
>        cArguments = (
>                GL_FRAMEBUFFER_EXT,
>                GL_COLOR_ATTACHMENT0_EXT,
>                GL_TEXTURE_2D,
>                1L,
>                0,
>        )
> )
>
>
> Thanks alot!!
>
> --
> Thomas Hansen
>

[PyOpenGL-Users] Problem attaching Texture to FBO on intel GMA 45000MHD (error when calling glFramebufferTexture2DEXT)

[Thomas H. <tho...@gm...>]

Hi everyone,

I using PyOpenGL 3.0.1b2 on Windows 7 on a Dell XT 2 tablet PC
(http://www.dell.com/tablet). The tablet has a intel GMA  4500MHD
graphics chip with the newest drivers from intel installed. I'm having
problems creating a Framebuffer object using pyOpenGL.  The following
code runs fine on every machine I have access to except for this one.
I know the graphics chip has FBO support, and have successfully
compiled and run various C programs using FBO's.

The problem occurs when I call glFramebufferTexture2DEXT, to attach my
texture to the FBO.  The program crashes and prints a traceback with
GL error code 1286, which I believe is
INVALID_FRAMEBUFFER_OPERATION_EXT.

If anyone knows what I am doing wrong, has a workaround, or even just
a suggestion of identifying the problem better, I would be very
thankful.

I'm posting a code snippet and the output it produces.  I know teh
code isnt complete and nothing is actually done with the fbo etc.  but
its enough to crash the program, and demonstrates the first problem I
encounter on this machine.

The code:
=======================================================================
import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GL.EXT.framebuffer_object import *

def draw ():
   glClearColor(0.0,0.0,0.0,0.0)
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
   #draw stuff here
   pygame.display.flip()

pygame.init()
pygame.display.set_mode((512,512),OPENGL | DOUBLEBUF)

#setup a texture
tex = glGenTextures(1);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 512, 512, 0, GL_RGBA,
GL_UNSIGNED_BYTE, None);
glBindTexture(GL_TEXTURE_2D, 0);

#setup teh fbo
fbo = glGenFramebuffersEXT(1)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo)
glBindTexture(GL_TEXTURE_2D, tex)

#this call produces an error!
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D, tex, 0)

while 1:
 event=pygame.event.poll ()
 if event.type is QUIT:
   sys.exit(0)
 draw()


Here is the output:
===================================================================
Traceback (most recent call last):
  File "test.py", line 29, in <module>
    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,GL_TEXTURE_2D, tex, 0)
  File "C:\Python26\lib\site-packages\pyopengl-3.0.1b2-py2.6-win32.egg\OpenGL\platform\baseplatform.py",
line 335, in __call__
    return self( *args, **named )
  File "C:\Python26\lib\site-packages\pyopengl-3.0.1b2-py2.6-win32.egg\OpenGL\error.py",
line 208, in glCheckError
    baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
	err = 1286,
	baseOperation = glFramebufferTexture2DEXT,
	cArguments = (
		GL_FRAMEBUFFER_EXT,
		GL_COLOR_ATTACHMENT0_EXT,
		GL_TEXTURE_2D,
		1L,
		0,
	)
)


Thanks alot!!

--
Thomas Hansen

Re: [PyOpenGL-Users] _base_glutInit( ctypes.byref(count), holder ) TypeError: 'NoneType' object is not callable

[Alejandro S. <as...@gm...>]

Hi John,

I'm cleaning up the message thread a little bit for easier readability.

> > Does anyone know what the fix for the following error is:
>>>> >
>>>> > C:\dev\PyOpenGL-Demo-3.0.1b1\PyOpenGL-Demo\NeHe>python
>>>> > Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit
>>>> (Intel)] on win32
>>>> > Type "help", "copyright", "credits" or "license" for more information.
>>>> >>>> import lesson5.py
>>>> > Hit ESC key to quit.
>>>> > Traceback (most recent call last):
>>>> >   File "<stdin>", line 1, in <module>
>>>> >   File "lesson5.py", line 240, in <module>
>>>> >     main()
>>>> >   File "lesson5.py", line 195, in main
>>>> >     glutInit(sys.argv)
>>>> >   File "C:\Python25\Lib\site-packages\OpenGL\GLUT\special.py", line
>>>> 323, in glutInit
>>>> >     _base_glutInit( ctypes.byref(count), holder )
>>>> > TypeError: 'NoneType' object is not callable
>>>> >>>>
>>>> >
>>>> > I am running 2.5 on XP with NVidia drivers. I have GLUT, GLU, OpenGL
>>>> installed on the system.
>>>> > I can get NeHe samples working from within VC++ 2010, just not Python.
>>>> >
>>>>
>>> OK, I've performed several tests and glut seems to be working fine on all
my configurations, in particular:

* PyOpenGL 3.0.0 on python2.6
* PyOpenGL 3.0.1b2 on python 2.6
* PyOpenGL 3.0.1b2 on python 2.5

They all seem to work, with the caveat being that all my tests were
performed on a Mac. Maybe someone else on the list who's using Windows XP
can reproduce the issue?

Cheers,
Alejandro.-

Re: [PyOpenGL-Users] _base_glutInit( ctypes.byref(count), holder ) TypeError: 'NoneType' object is not callable

[Alejandro S. <as...@gm...>]

On Jan 30, 2010, at 3:59 AM, John Lutz <joh...@gm...> wrote:

> Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit  
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import ctypes
> >>> ctypes.byref
> <built-in function byref>
> >>>
>
> 3.0.1b2

Hmmm, ok. I'll have to think about this for a little more :-)

I'll try creating a glut app and invoking the lesson 5 code as soon as  
I get an Internet connecton on my laptop.

Cheers,
Alejandro.-

>
> On Fri, Jan 29, 2010 at 11:33 PM, Alejandro Segovia  
> <as...@gm...> wrote:
> Hi John,
>
> On Saturday, January 30, 2010, John Lutz <joh...@gm...> wrote:
> > Hey Alejando,   Thanks for the reply! I tried both 'python  
> lesson5.py' that didn't work (btw I'm using 2.5).I cannot find  
> ctypearrays by googling.John
>
> could you check whether your python's ctypes package defines function
> "byref"? You can do this by importing ctypes and typing ctypes.byref
> from the interactive interpreter. Check to see if that is not None.
>
> Also, what version of PyOpenGL are you using?
>
> Alejandro.-
>
> >
> >
> > On Fri, Jan 29, 2010 at 9:27 PM, Alejandro Segovia <as...@gm... 
> > wrote:
> >
> > Hi John,
> >
> > Sorry for the last email. On a second thought I think the problem  
> could be due to the fact that when your launching lesson5 the way  
> you are, sys.argv is None.
> >
> > This might be causing glut to choke. Would you mind testing it by  
> invoking the interpreter using the command line like: C:\python26\bin 
> \python lesson5.py (windows)?
> >
> > Let us know how it goes.
> >
> > Cheers,
> > Alejandro.-
> >
> > Sent from my iPhone
> >
> > On Jan 29, 2010, at 8:22 PM, John Lutz <joh...@gm...> wrote:
> >
> >
> > Hey Guys!,
> >
> > Does anyone know what the fix for the following error is:
> >
> > C:\dev\PyOpenGL-Demo-3.0.1b1\PyOpenGL-Demo\NeHe>python
> > Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32  
> bit (Intel)] on win32
> > Type "help", "copyright", "credits" or "license" for more  
> information.
> >>>> import lesson5.py
> > Hit ESC key to quit.
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> >   File "lesson5.py", line 240, in <module>
> >     main()
> >   File "lesson5.py", line 195, in main
> >     glutInit(sys.argv)
> >   File "C:\Python25\Lib\site-packages\OpenGL\GLUT\special.py",  
> line 323, in glutInit
> >     _base_glutInit( ctypes.byref(count), holder )
> > TypeError: 'NoneType' object is not callable
> >>>>
> >
> > I am running 2.5 on XP with NVidia drivers. I have GLUT, GLU,  
> OpenGL installed on the system.
> > I can get NeHe samples working from within VC++ 2010, just not  
> Python.
> >
> > Thanks!,
> > John
> >
> >
> >  
> --- 
> --- 
> --- 
> ---------------------------------------------------------------------
> > The Planet: dedicated and managed hosting, cloud storage, colocation
> > Stay online with enterprise data centers and the best network in  
> the business
> > Choose flexible plans and management services without long-term  
> contracts
> > Personal 24x7 support from experience hosting pros just a phone  
> call away.
> > http://p.sf.net/sfu/theplanet-com
> > _______________________________________________
> > PyOpenGL Homepage
> > http://pyopengl.sourceforge.net
> > _______________________________________________
> > PyOpenGL-Users mailing list
> > PyO...@li...
> > https://lists.sourceforge.net/lists/listinfo/pyopengl-users
> >
> >
> >
> > --
> > John Lutz
> > (631)-909-2582
> >
> >
> >
>
>
>
> -- 
> John Lutz
> (631)-909-2582
>

Re: [PyOpenGL-Users] _base_glutInit( ctypes.byref(count), holder ) TypeError: 'NoneType' object is not callable

[Alejandro S. <as...@gm...>]

Hi John,

On Saturday, January 30, 2010, John Lutz <joh...@gm...> wrote:
> Hey Alejando,   Thanks for the reply! I tried both 'python lesson5.py' that didn't work (btw I'm using 2.5).I cannot find ctypearrays by googling.John

could you check whether your python's ctypes package defines function
"byref"? You can do this by importing ctypes and typing ctypes.byref
from the interactive interpreter. Check to see if that is not None.

Also, what version of PyOpenGL are you using?

Alejandro.-

>
>
> On Fri, Jan 29, 2010 at 9:27 PM, Alejandro Segovia <as...@gm...> wrote:
>
> Hi John,
>
> Sorry for the last email. On a second thought I think the problem could be due to the fact that when your launching lesson5 the way you are, sys.argv is None.
>
> This might be causing glut to choke. Would you mind testing it by invoking the interpreter using the command line like: C:\python26\bin\python lesson5.py (windows)?
>
> Let us know how it goes.
>
> Cheers,
> Alejandro.-
>
> Sent from my iPhone
>
> On Jan 29, 2010, at 8:22 PM, John Lutz <joh...@gm...> wrote:
>
>
> Hey Guys!,
>
> Does anyone know what the fix for the following error is:
>
> C:\dev\PyOpenGL-Demo-3.0.1b1\PyOpenGL-Demo\NeHe>python
> Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import lesson5.py
> Hit ESC key to quit.
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "lesson5.py", line 240, in <module>
>     main()
>   File "lesson5.py", line 195, in main
>     glutInit(sys.argv)
>   File "C:\Python25\Lib\site-packages\OpenGL\GLUT\special.py", line 323, in glutInit
>     _base_glutInit( ctypes.byref(count), holder )
> TypeError: 'NoneType' object is not callable
>>>>
>
> I am running 2.5 on XP with NVidia drivers. I have GLUT, GLU, OpenGL installed on the system.
> I can get NeHe samples working from within VC++ 2010, just not Python.
>
> Thanks!,
> John
>
>
> ------------------------------------------------------------------------------
> The Planet: dedicated and managed hosting, cloud storage, colocation
> Stay online with enterprise data centers and the best network in the business
> Choose flexible plans and management services without long-term contracts
> Personal 24x7 support from experience hosting pros just a phone call away.
> http://p.sf.net/sfu/theplanet-com
> _______________________________________________
> PyOpenGL Homepage
> http://pyopengl.sourceforge.net
> _______________________________________________
> PyOpenGL-Users mailing list
> PyO...@li...
> https://lists.sourceforge.net/lists/listinfo/pyopengl-users
>
>
>
> --
> John Lutz
> (631)-909-2582
>
>
>

Re: [PyOpenGL-Users] _base_glutInit( ctypes.byref(count), holder ) TypeError: 'NoneType' object is not callable

[Alejandro S. <as...@gm...>]

Hi John,

Sorry for the last email. On a second thought I think the problem  
could be due to the fact that when your launching lesson5 the way you  
are, sys.argv is None.

This might be causing glut to choke. Would you mind testing it by  
invoking the interpreter using the command line like: C:\python26\bin 
\python lesson5.py (windows)?

Let us know how it goes.

Cheers,
Alejandro.-

Sent from my iPhone

On Jan 29, 2010, at 8:22 PM, John Lutz <joh...@gm...> wrote:

> Hey Guys!,
>
> Does anyone know what the fix for the following error is:
>
> C:\dev\PyOpenGL-Demo-3.0.1b1\PyOpenGL-Demo\NeHe>python
> Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit  
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import lesson5.py
> Hit ESC key to quit.
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "lesson5.py", line 240, in <module>
>     main()
>   File "lesson5.py", line 195, in main
>     glutInit(sys.argv)
>   File "C:\Python25\Lib\site-packages\OpenGL\GLUT\special.py", line  
> 323, in glutInit
>     _base_glutInit( ctypes.byref(count), holder )
> TypeError: 'NoneType' object is not callable
> >>>
>
> I am running 2.5 on XP with NVidia drivers. I have GLUT, GLU, OpenGL  
> installed on the system.
> I can get NeHe samples working from within VC++ 2010, just not Python.
>
> Thanks!,
> John
>
> --- 
> --- 
> --- 
> ---------------------------------------------------------------------
> The Planet: dedicated and managed hosting, cloud storage, colocation
> Stay online with enterprise data centers and the best network in the  
> business
> Choose flexible plans and management services without long-term  
> contracts
> Personal 24x7 support from experience hosting pros just a phone call  
> away.
> http://p.sf.net/sfu/theplanet-com
> _______________________________________________
> PyOpenGL Homepage
> http://pyopengl.sourceforge.net
> _______________________________________________
> PyOpenGL-Users mailing list
> PyO...@li...
> https://lists.sourceforge.net/lists/listinfo/pyopengl-users

Re: [PyOpenGL-Users] _base_glutInit( ctypes.byref(count), holder ) TypeError: 'NoneType' object is not callable

[Alejandro S. <as...@gm...>]

Hi John,

On Jan 29, 2010, at 8:22 PM, John Lutz <joh...@gm...> wrote:

> Hey Guys!,
>
> Does anyone know what the fix for the following error is:
>
> C:\dev\PyOpenGL-Demo-3.0.1b1\PyOpenGL-Demo\NeHe>python
> Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit  
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import lesson5.py
> Hit ESC key to quit.
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "lesson5.py", line 240, in <module>
>     main()
>   File "lesson5.py", line 195, in main
>     glutInit(sys.argv)
>   File "C:\Python25\Lib\site-packages\OpenGL\GLUT\special.py", line  
> 323, in glutInit
>     _base_glutInit( ctypes.byref(count), holder )
> TypeError: 'NoneType' object is not callable
> >>>
>
> I am running 2.5 on XP with NVidia drivers. I have GLUT, GLU, OpenGL  
> installed on the system.
> I can get NeHe samples working from within VC++ 2010, just not Python.

This might sound trivial, but are you importing package "ctypes" from  
within lesson5.py? It seems as if it didn't know what ctypes.byref is.

Best regards,
Alejandro.-

>
> Thanks!,
> John
>
> --- 
> --- 
> --- 
> ---------------------------------------------------------------------
> The Planet: dedicated and managed hosting, cloud storage, colocation
> Stay online with enterprise data centers and the best network in the  
> business
> Choose flexible plans and management services without long-term  
> contracts
> Personal 24x7 support from experience hosting pros just a phone call  
> away.
> http://p.sf.net/sfu/theplanet-com
> _______________________________________________
> PyOpenGL Homepage
> http://pyopengl.sourceforge.net
> _______________________________________________
> PyOpenGL-Users mailing list
> PyO...@li...
> https://lists.sourceforge.net/lists/listinfo/pyopengl-users