Re: [PyOpenGL-Users] GLE on linux systems

[Stéphane A. <san...@fr...>]

On 26/11/2015 09:45, Stéphane ANCELOT wrote:
> On 11/11/2015 19:26, Mike C. Fletcher wrote:
>> On 15/10/15 12:26, Stéphane ANCELOT wrote:
>>> Hi,
>>>
>>> I have noticed in my recent linux systems I was no more able to use 
>>> GLE API with pyopengl.
>>>
>>> I tried reinstalling the sources, the problem is the same :
>>> I can import GLE but not use any functions .
>>>
>>> OpenGL.error.NullFunctionError: Attempt to call an undefined 
>>> function gleSetJoinStyle, check for bool(gleSetJoinStyle) before calling
>>>
>>> I have found similar people with same problem, but no answer.
>>>
>>> I am a bit surprised, since setting up Release 3.0.2 from source is 
>>> working , but not releases 3.1.x .
>>>
>>> I tried using ctypes and loading libgle libs, no problem.
>>>
>>> So, If there is no "good" reason, to inhibit it in 3.1.x releases it 
>>> should work.
>>
>> Could you give more details as to *what* Linux systems? PyOpenGL is 
>> primarily written on Kubuntu machines (12.04 and 15.10) and on both 
>> GLE tests using PyOpenGL-Demo and OpenGLContext are all working.
>>
> OpenSuse 13.2  64 bits system. (you can testdrive it on susestudio.com)
>> Are you sure that you've created a GL context before calling any GLE 
>> functions?
> This is a working / running application, with context, no problem.
>> I was working on getting the final 3.1.1 release out today, but it 
>> seems that will need to wait until we address this (afraid I haven't 
>> been monitoring my PyOpenGL folder as I worked on my conference 
>> presentation).
>
> It looks like you are using ctypes, so I made few investigations and 
> tried this :
> I had the /usr/lib64/libgle.so library file in the system.
> I made a symlink named "libGLE.so" in the same directory ===> now, 
> PyOpenGL can run gle Commands !
>
> That may give you some ideas...
>
> without any context, the following gle command should work :
> gleGetJoinStyle()
> gleSetJoinStyle(...)
>
This more complicated than that , if I import GLU before GLE, the 
behaviour is not the same:

linux-qhf9:~ # python
Python 2.7.8 (default, Sep 30 2014, 15:34:38) [GCC] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> from OpenGL.GLE import *
 >>> gleGetJoinStyle()
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File 
"/usr/lib/python2.7/site-packages/OpenGL/platform/baseplatform.py", line 
407, in __call__
     self.__name__, self.__name__,
OpenGL.error.NullFunctionError: Attempt to call an undefined function 
gleGetJoinStyle, check for bool(gleGetJoinStyle) before calling
 >>>

linux-qhf9:~ # python
Python 2.7.8 (default, Sep 30 2014, 15:34:38) [GCC] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> from OpenGL.GLU import *
 >>> from OpenGL.GLE import *
 >>> gleGetJoinStyle()
274


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