[GRASS-dev] Re: nvizlib compile error

[Michael Barton]

Martin,

I'm more than happy to test and report, but I have to at least get it  
compiled. It seems like it's getting closer.

Michael
____________________
C. Michael Barton, Professor of Anthropology
Director of Graduate Studies
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University

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On Jul 9, 2008, at 11:24 PM, Martin Landa wrote:

> Hi,
>
> thanks for the hits. I have commited some changes [1].
>
> However I have no access to Mac. Needs some investigation how to make
> off-screen rendering working.
>
> Martin
>
> [1] http://trac.osgeo.org/grass/changeset/32068
>
> 2008/7/10 Glynn Clements <glynn at gclements.plus.com>:
>>
>> Michael Barton wrote:
>>
>>> Are we at a place yet where I can compile and test this on a Mac,
>>> given it's location of OpenGL in the agl directory?
>>
>> The code won't compile on a Mac at present.
>>
>> AFAICT, it requires at least:
>>
>>   /* TODO */
>> -    rwin->displayId = aglChoosePixelFmt(GDHandle *dev, int ndev,  
>> attributeList);
>> +    rwin->displayId = aglChoosePixelFmt(NULL, 0, attributeList);
>>
>> -    rwin->contextId = aglCreateContext(rwin->display, NULL);
>> +    rwin->contextId = aglCreateContext(rwin->displayId, NULL);
>>
>>   /* create win pixmap to render to (same depth as RootWindow) */
>> -    rwin->pixmap = NULL; /* TODO */
>> +    rwin->pixmap = <no idea what should go here, but it ain't NULL>;
>>
>> There is some information on AGL at:
>>
>> [1]     http://www.mesa3d.org/brianp/sig97/agl.txt
>> [2]     http://www.mesa3d.org/brianp/sig97/compare.htm
>>
>> but I don't know how much of that refers to "classic" rather than  
>> OSX.
>> There's a lot more information in visualization/nviz/src/togl.c, but
>> it doesn't include creating off-screen pixmaps.
>>
>> I also note:
>>
>> [3]     http://www.iua.upf.es/~ggeiger/redbookhtml/apc.html
>>
>>       Off-screen Rendering
>>
>>       To render off-screen, first create an off-screen graphics
>>       world in the usual way, and pass the handle into
>>       aglCreateAGLPixmap().
>>
>> Good luck on figuring out what "the usual way" is ;)
>>
>> A Google search for aglCreateAGLPixmap produces exactly 7 hits; I've
>> just posted three of them, and the other 4 seem to be duplicates of
>> [1] and [3].
>>
>> IOW, everything that mentions aglCreateAGLPixmap seems to assume that
>> you are already familiar with normal (non-OpenGL) Mac GUI  
>> programming.
>>
>> In any case, it's going to require some amount of trial and error  
>> from
>> someone with a Mac.
>>
>> --
>> Glynn Clements <glynn at gclements.plus.com>
>>
>
>
>
> -- 
> Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/ 
> ~landa *