weird o2 rendering errors

weird o2 rendering errors

Post by dave scruto » Fri, 11 Jul 1997 04:00:00



hi. i've noticed that any program which produces
  3d, solid, lit objects in a hybrid openGL/motif
    window looks as if the Z-buffer is flipped
  upside-down, producing some VERY weird looking
 results.  this bug even happens with a SGI demo,
(olight) from the 4Dgifts.

this weirdness doesn't happen in IRIS, extreme,
  or impact platforms.....

anyone seen this one?
...pls reply to my email addr if you can

tanx!

Dave Scruton
Hughes Aircraft

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1. Weird POV syntax error / bug

Since the PovRay pages are more or less closed, I see no other
way than to report a bug/inconvenience here in this newsgroup:

For some reason the following definition gives an error:

sphere {
  <0,0,0>,1
  #declare Tex = texture { pigment { color Blue } }
  texture { Tex }

The error reads:

  texture { Tex  <----ERROR

test.pov:16: error: No matching } in texture, undeclared identifier
'Tex' found instead.

Any other (non-texture) declaration is OK; even the insertion of
an extra declaration after the "#declare Tex" line makes the
error disappear, like in:

sphere {
  <0,0,0>,1
  #declare Tex = texture { pigment { color Blue } }
  #declare A = 1
  texture { Tex }

The error is not harmful. Just reporting...

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