🚀 go-pugleaf

In article <92349.141625SML108@psuvm.psu.edu> SML108@psuvm.psu.edu writes:
>Hi, a program I am developing which uses the sphere library runs just
>fine on an IRIS 4D/220 VGS, but when I run it on a nearby Indigo XS24,
>the SPH_HEMI seems to get set true by default with SPH_ORIENT set to
>FALSE (It draws hemispheres which show up as you rotate objects on
>the screen).  If I set SPH_HEMI and SPH_ORIENT to TRUE, this problem
>goes away, but then z-buffering goes away too and the appearance of
>spheres on the screen is as if they all have the same z-coordinate
>and appear in the order in which they are drawn...  The Indigo is
>running 4.0.5 and zbuffer is most definitely set to TRUE...

Are you sure you have zbuffers?  Zbuffer hardware is an extra
cost option with XS24 graphics, and unlike Entry graphics XS24
doesn't do software zbuffering.

If you don't know whether you have zbuffer hardware, try running
/usr/gfx/gfxinfo.  Output on a XS24z (XS with zbuffer hardware)
should look something like this:

	Graphics board 0 is "GR2" graphics.
        	Managed (":0.0") 1280x1024 
        	1 GE, 24 bitplanes, 4 auxplanes, 4 cidplanes, Z-buffer
							      ^^^^^^^^
If you do have the zbuffer hardware, spheres should draw correctly
with SPH_HEMI and SPH_ORIENT set to TRUE.
 
arthur