On Fri, Jul 12, 2002 at 07:54:11AM -0600, Brian Paul wrote:
> Andy Isaacson wrote:
> > On Thu, Jul 11, 2002 at 06:10:01PM -0400, Mike Westall wrote:
> >>The attached program illustrates a shading anomaly 
> >>we have encountered while attempting to use autonormal
> >>in conjunction with nurbs.  
> >>
> >>The shading of the sphere is seriously screwed up 
> >>while running with indirect rendering on the standard
> >>X server packaged with RH 7.3.   It can be fixed by
> >>uncommenting the /* #define CORRECT 1 */ on line 8. 
> > 
> > Your example did fail for me on RH7.1 as well -- the sphere was rendered
> > in 4 "quarters" of solid shading, but a recent DRI build rendered it
> > just fine.  I'll take a screen shot when I'm back at work tomorrow...

I've put a screenshot of the misrendered sphere at
http://web.hexapodia.org/~adi/nurbsphere.png

I got that result on a fairly standard RedHat 7.1 system, but I can't
tell if it's using Mesa (client-side rendering) or indirect-software
rendering.

% ldd ./a.out|head -5
        libGLU.so.1 => /usr/lib/libGLU.so.1 (0x40024000)
        libGL.so.1 => /usr/lib/libGL.so.1 (0x40038000)
        libm.so.6 => /lib/i686/libm.so.6 (0x4029a000)
        libc.so.6 => /lib/i686/libc.so.6 (0x402be000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x403ee000)
% ls -l /usr/lib/libGL*.so
lrwxrwxrwx    1 root     root           19 Sep 10  2001
/usr/lib/libGL.so -> libGL.so.1.2.030401*
lrwxrwxrwx    1 root     root           20 Sep 10  2001
/usr/lib/libGLU.so -> libGLU.so.1.1.030401*
% rpm -qf /usr/lib/libGL.so
Mesa-devel-3.4-13
% rpm -qa|grep Mesa
Mesa-3.4-13
Mesa-devel-3.4-13
% glxinfo
display: :0.0  screen:0
direct rendering: No
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context
client glx vendor string: SGI
client glx version string: 1.2
client glx extensions:
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context, 
    GLX_ARB_get_proc_address
GLX extensions:
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context
OpenGL vendor string: VA Linux Systems, Inc.
OpenGL renderer string: Mesa GLX Indirect
OpenGL version string: 1.2 Mesa 3.4
[...]

-andy


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