[PD] [GEM-dev] gl stack underflow

[cyrille henry]

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.
> 
>