[PD] gem and double buffer

[Jack]

Le 19 juin 09 à 16:43, Jack a écrit :

>
> Le 19 juin 09 à 16:23, cyrille henry a écrit :
>
>>
>>
>> Jack a écrit :
>>> Le 19 juin 09 à 14:54, cyrille henry a écrit :
>>>>
>>>>
>>>> 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.
>>> Yep, there is blur with antialiasing and with [pix_snap] and  
>>> [pix_texture] (with quality 0 or 1) or with [pix_snap2tex]. But  
>>> it seems to be OK with [gemframebuffer] and [pix_texture] (with  
>>> quality 0 or 1).
>>> Have you an other method to avoid blur with [pix_snap] and  
>>> [pix_snap2tex] with antialiasing ?
>>
>> pix_snap2tex and antialiasing did not gives blur here.
>> at least with the attached patch.
>> but i thik it used to.
>> i would not be surprised if that would depend on the driver/ 
>> hardware...
>>
>> could you try this patch?
>
> Yep, i get blur here.
> MacOSX.4.11, Pd version 0.41.4-extended-rc2, GEM ver: 0.91.3 'tigital'
> I will test tomorrow on Ubuntu 9.04.
> ++
>
> Jack

It's OK with Ubuntu 9.04 and Pd cersion 0.41.4-extended and GEM ver:  
0.92.CVS, there is no blur.
However, i have a strange behaviour with Ubuntu/Pd/GEM with  
[pix_snap2tex] when i use 1024x768, my circle centers should be on  
the same horizontal line but this not the case.
Here two screen captures of the same patch : one under MacOSX, the  
other under Ubuntu.
Any idea about this strange behaviour under Ubuntu ?
To finish, there is no problem when i work with 800x600 !
++

Jack

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>
>
>>
>>
>> c
>>
>>> ++
>>> Jack
>>>>
>>>> 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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