[PD] [GEM-dev] gl stack underflow

Matteo Sisti Sette matteosistisette at gmail.com
Fri Jan 1 17:32:43 CET 2010


By the way is there any trick to "track" a GL error to find the object 
triggering it? (apart deleting objects until you find the one)

cyrille henry escribió:
> 
> 
> Matteo Sisti Sette a écrit :
>> cyrille henry escribió:
>>
>>> you try to get value from the stack when it is empty.
>>>
>>> you can have such error when using glPopMatrix without using 
>>> glPushMatrix...
>>
>>
>> First of all thank you for helping.
>>
>> I never explicitly use these functions, that is, I never use 
>> [GEMglPopMatrix] nor [GEMglPushMatrix].
>>
>> I guess [separator] has something to do with pushing and popping from 
>> that matrix, but shouldn't its push and pop operations always 
>> automatically "match"?
> yes, it should
>> Whay kind of anomaly in a patch can cause a call to a pop without a 
>> "matching" push?
> 
> save your patch. simplify it until it did not print this error. You can 
> then find the cause of this inappropriate pop...
> 
>> Do you think it is unrelated to the use of shaders?
> i never saw a shader doing this kind of error.
> you can easily test this if you remove the shader from the rendering 
> pipe...
> 
> c
> 
>> Btw is that the only stack that can underflow?
>>
>> Thanks
>>
>>> why do you always send your mail to the pd list AND gem-dev?
>>> this 2 lists are for different purpose, and people on Gem-dev are 
>>> also on pd-list.
>>
>> Oh sorry about that. Maybe I shouldn't; I'll stop doing that right now.
>> Since there isn't (to my knowledge) a "gem-list", specific to gem but 
>> not to developing, I thought I'd send gem-related questions to gem-dev 
>> too... You make me realise it is unnecessary and probably 
>> inappropriate, if most people in gem-dev are also on pd-list.
>>
>>
> 


-- 
Matteo Sisti Sette
matteosistisette at gmail.com
http://www.matteosistisette.com




More information about the Pd-list mailing list