[GRASS-dev] New OpenGL options to test for native Mac and Win NVIZ

[William Kyngesburye]

There are new build options to make a native X11-less NVIZ for Mac OS  
X and Windows.  Mac OS X is the only one tested so far

It's been tested a little on a PPC Mac, both Tiger and Panther, and  
NVIZ works so far.  I also tested on a MacBook, the Intel Mac with  
the Intel GMA integrated graphics chip, and it crashes.  I don't have  
a 'Pro' MacBook or Intel iMac with 'real' ATI graphics hardware to  
test on.

The only option needed to set the OpenGL platform is --with-opengl.   
By default it uses X11, or GLX-based, OpenGL, so it doesn't break old  
habits.

--with-opengl=aqua, or agl, uses Mac OS X's AGL interface to OpenGL,  
for a native Aqua NVIZ (and ogsf library).  OpenGL include and lib  
options do not need to be specified for AGL, and will be ignored,  
they're all fixed on Mac OS X.

--with-opengl=windows, or wgl, uses Windows' WGL interface to OpenGL.

X11 can still be used for the XDRIVER, alongside AGL.  NVIZ will not  
interact with X11.  So, --with-x11 --with-opengl=aqua, will give you  
both a Mac NVIZ and an X11 d.mon to work with.  And, gis.m (any Tcl  
scripts) will also use the Aqua Tcl.

The Mac AGL build, for now, requires a separate Aqua framework build  
of Tcl/Tk, and NOT Apple's Tcl/Tk framework on Tiger - it's missing  
the required private headers.  The old Tcl/Tk Aqua packages should  
work, but the Tcl/Tk build instructions are easy to follow for  
building your own for an up-to-date Tcl/Tk framework, or I have a  
Universal Tcl/Tk package on my site.  So you don't have to muck  
around patching configure, you should add symlinks to the framework  
binaries in /usr/local/lib (my package takes care of this):

sudo ln -s /Library/Frameworks/Tcl.framework/Tcl /usr/local/lib/ 
libtcl.dylib
sudo ln -s /Library/Frameworks/Tk.framework/Tk /usr/local/lib/ 
libtk.dylib

Then you would use this in configure:

--with-tcltk-includes="/Library/Frameworks/Tcl.framework/Headers / 
Library/Frameworks/Tk.framework/Headers /Library/Frameworks/ 
Tk.framework/PrivateHeaders" --with-tcltk-libs=/usr/local/lib

A framework TclTk option is in the works for GRASS configure.


TESTING NEEDED: Try a windows openGL configuration.  Try on Intel Mac  
with ATI graphics.

-----
William Kyngesburye <kyngchaos at kyngchaos.com>
http://www.kyngchaos.com/

Theory of the Universe

There is a theory which states that if ever anyone discovers exactly  
what the universe is for and why it is here, it will instantly  
disappear and be replaced by something even more bizarrely  
inexplicable.  There is another theory which states that this has  
already happened.

-Hitchhiker's Guide to the Galaxy 2nd season intro