[PD] pix_mask and gemframebuffer

[Max]

yes, that's a nice patch.
i am still wondering though why it doesn't look the same (sharp) when done without glsl.
i remember someone said that he was working on making glsl abstractions to replace some of the pix_ es
m.

(posting back to pd-list, hope that's okay for you)

Am 09.11.2011 um 16:23 schrieb Guido Tamino:

> Hello,
> 
> I've put together this quick and dirty glsl patch for alpha masking.
> http://www.mediafire.com/file/c5cey458piu1d47/glslMask.zip
> 
> Hope it helps.
> 
> Best,
> Guido
> 
> Il giorno 09/nov/11, alle ore 15:01, Max ha scritto:
> 
>> <masking4.pd>
>> 
>> 
>> Am 09.11.2011 um 14:41 schrieb cyrille henry:
>>> Le 09/11/2011 12:23, Max a écrit :
>>>> thanks cyrille,
>>>> am i getting closer?
>>> yes, a bit.
>>> except that :
>>> - gemframbuffer does not have the same camera position than gemhead.
>>> you need to add translateXYZ 0 0 -4
>> 
>> ah, right.
>> works! but looks terrible. i am wondering why the resolution and edge looks so bad.
>> 
>>> - pix_snap snap the curent frambuffer, you don't need to pass the framebuffer texture.
>>> see attachment.
>>> 
>>>> it's ok if it is slow, but i want to use gem objects to make a mask i can animate in gem, so there is now way around the snapping if i understand that correctly.
>>> it's possible with shader : render 1st scene in a frambuffer
>>> other scene in a 2nd frambuffer. set it to use texunit 1
>>> then, use something like the example : 10.glsl/5.multitexture, and change a bit the mixing equation.
>> 
>> ok, seems that the answer on anything gem related i try lately is glsl.
>> max
>> 
>> 
>>> cyrille
>>> 
>>>> 
>>>> max
>>>> 
>>>> 
>>>> Am 09.11.2011 um 14:07 schrieb cyrille henry:
>>>> 
>>>>> hello,
>>>>> pix_masque need a pix, not a texture.
>>>>> (one is in the CPU, the other in the GPU).
>>>>> you need a pix_snap to pass the texture to a pix object.
>>>>> beware, this is slow.
>>>>> i recommend using a shader to emulate pix_masque, but using 2 texture and not 2 pix.
>>>>> it will be hundred time faster.
>>>>> 
>>>>> 
>>>>> Cyrille
>>>>> 
>>>>> 
>>>>> Le 09/11/2011 11:52, Max a écrit :
>>>>>> dear list,
>>>>>> 
>>>>>> i'm trying to generate a b/w mask in gemframebuffer for a pix_mask
>>>>>> pix_mask seems to ignore the texture from gemframbuffer.
>>>>>> hints appreciated.
>>>>>> m.
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
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>>>> 
>>> <masking3.pd>
>> 
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