[PD-dev] smoke object help

[marius schebella]

hi,
I did not follow the whole thread of this discussion, so maybe you are 
talking about something different, but to change the cameraposition and 
viewing point of the gem window send the message view (and maybe also 
perspec) to the gemwin object (see help patch of gemwin 'pd viewing')
marius.

nosehair911 at bellsouth.net wrote:
> The reason I was not seeing anything was that the code was using glVertex2f and it seems that 
> anything above -1 z depth desapears in gem.  So I ended up using glVertex3f( number,number, -1.1) 
> and now I can see stuff happening. Now my problem is that the action is all limited to the positive side 
> of the grid. Also coordinate 500,500 is 0,0 in the gem grid and 0,0 is 2.5,2.5 on the gem grid.  If 
> anyone knows a simple way to fix this let me know.
> Thanks,
> Alain
> 
>> From: <nosehair911 at bellsouth.net>
>> Date: 2007/08/03 Fri AM 08:47:08 EDT
>> To: <pd-dev at iem.at>
>> CC: pd-list at iem.at
>> Subject: [PD-dev] smoke object help
>>
>> Hi all,
>>
>> I posted this in the gem-dev list but maybe someone here can give a some advise or a different 
>> solution for my problem. The reason I am trying to use gem is because they have already figured 
> out 
>> the glLoop problem between openGL and Pd. Also because I then would have access to the other 
>> gem objects.
>>
>> I am trying to transcribe this glut application here:
>>
>> http://www.nada.kth.se/~gustavt/fluids/
>>
>> into a gem object. At first at thought it would be easy seeing as the code was 
>> pretty much working but 
>> I am having a tough time of it. I compiled the original application and it 
>> works perfect but it seems like 
>> when I convert it to a gem object I get nothing.
>>
>> Here are some things I am assuming, please correct me...
>> 1. glut and openGL/Gem use the same measurements like when I use glVertex2f(px, 
>> py); it is the 
>> same in both.
>> 2. Instead of using the glut mouse controls I can use a list inlet to get x and 
>> y coordinates.
>>
>> Other than that I pretty much copied the app and used render(GemState *state) 
>> to put all of the 
>> rendering stuff into. But I still cant get it to work. I get a black screen. 
>> I think it is probably drawing 
>> somewhere of screen but I really cant seem to figure out how to fix the 
>> problem. If anyone can give 
>> me a clue I would appreciate it.
>> Thanks,
>> Alain
>>
>>
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> 
> 
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