[PD-dev] smoke object help

[nosehair911 at bellsouth.net]

Thanks for your responce.  perspec -1 640 -1 480 1 1001 did the trick. What I dont get is why I cant do 
perspec -1 640 -1 480 999 1001 and view 0 0 1000.  The image disapears I have to have perspec at 
1 1001 to see an image. Even if I do 2 1001 I get nothing. With other geos it works but not with this 
one I am writing. Could it be that my z depth is set at -1. I dont think that is it but maybe some one can 
explain that to me.
Thanks,
Alain

> 
> From: marius schebella <marius.schebella at gmail.com>
> Date: 2007/08/04 Sat PM 04:16:20 EDT
> To: nosehair911 at bellsouth.net
> CC: pd-dev at iem.at
> Subject: Re: [PD-dev] smoke object help
> 
> 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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