[openvrml-develop] material-rendering bug (was ANN: OpenVRML 0.18.5)

[Greg R. <ne...@po...>]

>> Are the other problem worlds publicly available?

> I've just uploaded a tarball here:

The weird brown desktop in the cubicles model in the tarball was bothering
me, but I thought it must have been due to some subtle alignment issue
between that specific bit of geometry and my light source(s).  Doesn't
look like it, though:

	http://gregroelofs.com/test/cubicles-moved-DeskCorner.wrl

(Note that the textures aren't there, so copy that file wherever you
unpacked the tarball for complete parity with cubicles.wrl.  The relevant
"feature" isn't dependent on the textures, though.)

Anyway, that's an identical file except that the specific instance of the
DeskCorner proto that was brown in cubicles.wrl has been moved in front of
all the other desk-related instances (about 20-30 lines up).  Now it works
correctly, i.e., it matches all the other desktop surfaces.

I'm wondering of this is another manifestation of the apparent memory
corruption seen in the crashes.  There are similar color oddities on all
of the rectangular portions of desktop (Desk_2x2 protos), but only on the
(exposed) sides and undersurfaces.  I haven't completely verified that
that's not a real artifact/oversight in the model, but I've got some old
screenshots from other browsers that suggest it's not normal (so to speak).

Btw, note that the weird brown color is almost identical to that of the
cubicle sides visible from the second viewpoint.  This is more apparent if
you mouse-rotate the first (top down) viewpoint a bit.

Oh, and one other gotcha with sdl-viewer:  it appears that any X events
(e.g., mouseover) while it's setting up the initial scene will lock up X
input in a way reminiscent of the old Motif menu-focus-grab lockups.  The
mouse still moves, but focus doesn't change, and neither mouseclicks nor
keyboard input are accepted.  Since modern X no longer supports the old
AllowDeactivateGrabs option, I can't verify that it's actually a grab
issue, but that's what it feels like.  (Logging in from another machine
and killing the sdl-viewer process takes care of it.)

Greg