[GEM-dev] Different Alpha Blending Methods in Alpha Object

Jack jack at rybn.org
Wed Nov 21 15:02:51 CET 2012


Le 20/11/2012 18:52, Santi a écrit :
> Hello,
>
> i don't know if this is the right place to write, sorry if don't.
>
> I'm working in a project with PD/Gem and i need more blending methods
> than the original Alpha object has. I've modified slightliy the file
> alpha.cpp (see atachment) and recompiled Gem. Simply i've add the
> different OpenGL blending mehods to the switch in the function
> funmess(). Some are working in mi system (Debian Wheezy), others are
> the same output than GL_ONE. I like specially GL_ONE_MINUS_SRC_COLOR,
> it doesn't saturate the bright pixels like GL_ONE_MINUS_SRC_ALPHA does.
>
> My question: Is there any reason to not include different alpha
> blending methods? the modification i've made is very simple and
> obvious, so i'm thinking about why not had made before... do i have
> lost something?
>
> Regards and sorry for my english...
>
> Santi Noreña    
>
>
> _______________________________________________
> GEM-dev mailing list
> GEM-dev at iem.at
> http://lists.puredata.info/listinfo/gem-dev

Hello,

You can use the object [GEMglBlendFunc].
++

Jack


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