RE: BACK_TO_FRONT sorting and 'Inverse Singular Matrix'

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Greg Harrison (harrisog++at++geocities.com)
Thu, 7 Jan 1999 20:02:29 -0500

Yep. There was a few scales that were zero in one axis. Fudging them to
0.00001f works. Thanks, Angus!

Greg Harrison
Air Force Institute of Technology

You sure there isn't a culprit DCS in the graph with a singular matrix,
for example shadows on the ground with a zero scaling factor in Z?

FYI this would cause z fighting which wouldn't be solved by sorting.
It's a different class of problem.

What machine are you using?

Also for sort to look good you need the objects with transparency to be
split up at the granularity of potential occlusion. Sorting only happens
on geosets so objects which potentially occlude each other need to be is
separate geosets. You chould also consider the centroid & size of these
objects, a simple depth sort will not work if objects overlap
significantly on some axis w.r.t. their rize

Cheers,Angus.

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