[PD] Fwd: Lighting glitch, [alpha]-object depth detection

[Jack]

Le 29/01/2013 16:54, Klemens Schmiady a écrit :
>>> *Von: *Jack <jack at rybn.org <mailto:jack at rybn.org>>
>>> *Betreff: **Aw: [PD] Lighting glitch, [alpha]-object depth detection*
>>> *Datum: *17. Januar 2013 21:57:10 MEZ
>>> *An: *pd-list at iem.at <mailto:pd-list at iem.at>
>>>
>>> Le 17/01/2013 10:18, Klemens Schmiady a écrit :
>>>> Am 10.01.2013 18:38, schrieb Jack:
>>>>> Le 10/01/2013 16:22, Max a écrit :
>>>>>> Am 10.01.2013 um 12:34 schrieb Jack <jack at rybn.org>:
>>>>>>> Le 10/01/2013 11:57, Klemens Schmiady a écrit :
>>>>>>>> Am 10.01.2013 11:40, schrieb Cyrille Henry:
>>>>>>>>> hello,
>>>>>>>>>
>>>>>>>>> i can't reproduce this.
>>>>>>>>> is there anything special to do in the patch?
>>>>>>>>> cheers
>>>>>>>>> c
>>>>>>>>>
>>>>>>>>> Le 10/01/2013 11:06, Klemens Schmiady a écrit :
>>>>>>>>>> Hey there,
>>>>>>>>>>
>>>>>>>>>> the sphere in combination with the lighting leads to strange
>>>>>>>>>> artefacts as shown in the .jpg.
>>>>>>>>>> Looking for a solution.
>>>>>>> I think, this is because your viewpoint come too close to your geo (sphere).
>>>>>>> Put a [max 2] (for example) on your Z axis for the viewpoint to avoid
>>>>>>> collision.
>>>>>> i don't think it's that. i simplified the patch a bit more:
>>>>>>
>>>>>>
>>>>>>
>>>>>> with
>>>>>> GEM: ver: 0.93.3 
>>>>>> GEM: compiled: Nov 10 2011
>>>>>> i have the same phenomenon here.
>>>>>
>>>>> Yep, you are right Max. I think it was a problem with the near
>>>>> clipping plane of the frustum. But i was wrong...
>>>>> Cyrille, your patch seems to have the same problem if you put an
>>>>> alpha = 0.5, or i am wrong ?
>>>>> Here a patch that enable culling.
>>>>> Hoping it helps to solve _this_ problem.
>>>>> ++
>>>>>
>>>>> Jack
>>>>>
>>>>> PS : dont't forget to start by rendering the light before geos
>>>>> with an argument in [gemhead] ;)
>>>>>
>>>>> _______________________________________________
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>>>> I implemented your patch into what I'm working on at the moment but
>>>> the light goes all crazy and I don't know anything about openGL.
>>>> The lightsource should be in the center of the patch somehow.
>>>> Can you please help me with that!
>>>>
>>>> Thanks,
>>>>
>>>> Klemens
>>>>
>>>>
>>>> _______________________________________________
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>>> Hello Klemens,
>>>
>>> Can you tell us your configuration (OS, Graphic card, Pd version and
>>> Gem version) ?
>>> Have you put an _argument_ in your [gemhead] ? See example (in Gem
>>> help) if you didn't put it.
>>> You have to render lights before the first sphere. And the first
>>> sphere before the second sphere.
>>> In fact, in your patch you can't know what is render first because
>>> you don't have this argument.
>>> See attached patch if it works for you.
>>> ++
>>>
>>> Jack
>>>
>>>
>>>
>>
>>
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>
> I tried you patch I there are no visual differences between yours and
> mine.
>
> I'm using win7, intel hd graphics 4000 card, pd 0.42.5 extended and
> gem 0.93.3.
>
> Thanks,
>
> Klemens
>
>
> _______________________________________________
> Pd-list at iem.at mailing list
> UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list

Please, can you send your patch ?
The patch i sent before didn't work for you ?
Have you tried other method sent on this list in this thread ?
++

Jack


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