[PD] gem and double buffer

[cyrille henry]

Jack a écrit :
> Le 19 juin 09 à 11:38, cyrille henry a écrit :
> 
>>
>>
>> jack at rybn.org a écrit :
>>> Yep, that's why Cyrille says that you can use [pix_snap] or
>>> [pix_snap2tex].
>>
>> like in exemple 07.texture/07.feedback
>>
>>> Or you can also use [gemframebuffer].
>>
>> like in exemple 10.glsl/06.framebuffer and shader, but removing the 
>> shader.
>>
>>> With that, you can capture a certain part of your last frame and add 
>>> it to
>>> your new. But the result could be not very nice.
>>
>> why?
>>
> 
> I was sure that a blur appear after a certain period. But i am wrong.
> So there is no problem to use this objects to simulate single buffer in 
> double buffer mode !
blur can appear, under cettain condition, with antialiasing / quality 1 to the texture or small displacement.
but you can avoid it if you wish.

c

> ++
> 
> Jack
> 
> 
>>> Try !
>>> ++
>>> Jack
>>>> yes, but my problem is : I need to emulate single buffer on double 
>>>> buffer,
>>>> i need to use double buffer because i work with iterations using 
>>>> repeat or
>>>> until objects, and in single buffer with metro this iterators are so 
>>>> so so
>>>> slow, almost "2" fps.
>>
>> wow, it's strange that it is slower in single buffer.
>> do you have a test patch that demonstrate this?
>>
>>>>
>>>> i want don´t clear the image buffer when is drawed the new buffer, 
>>>> like an
>>>> accumulation...but using double buffer!!....is possible???...in single
>>>> buffer is easy, but with iterators....no way.
>>
>> i don't understand why iterators can't work in single buffer.
>>
>> cyrille
>>
>>
>>>>
>>>>
>>>> thanks for your patience.
>>>>
>>>> Message: 6
>>>> Date: Mon, 15 Jun 2009 18:34:18 +0200
>>>> From: cyrille henry <cyrille.henry at la-kitchen.fr>
>>>> Subject: Re: [PD] gem and double buffer
>>>> To: Andres Ferrari <anfex at yahoo.com>
>>>> Cc: pd-list at iem.at
>>>> Message-ID: <4A36780A.1000905 at la-kitchen.fr>
>>>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>>>
>>>>
>>>>
>>>> Andres Ferrari a ?crit :
>>>>> hello,
>>>>>
>>>>> is possible in gem to change between single buffer and double buffer
>>>>> without destroy gemwindow??
>>>> no
>>>>
>>>>> or dont`t clear buffer(background image) in double buffer???
>>>> not really, but you can sna2tex and draw the last image on every frame.
>>>>
>>>> you can also easily emulate 2 buffer while in single buffer, using 
>>>> metro
>>>> to bang gemhead and clean windows / clear Z buffer.
>>>>
>>>> Cyrille
>>>>
>>>>> thanks a lot!!!
>>>>>
>>>>> Andr?s Ferrari G.
>>>>>
>>>>> http://www.myspace.com/anfex
>>>>
>>>>
>>>>       
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> 
>