Revision: 46352
http://brlcad.svn.sourceforge.net/brlcad/?rev=46352&view=rev
Author: brlcad
Date: 2011-08-23 19:29:17 +0000 (Tue, 23 Aug 2011)
Log Message:
-----------
primitive testing has uncovered off-by-one raytrace errors during identical
subsequent invocations of rt due to some floating point issue during parallel
processing. single processor results in zero errors yet parallel gives subtle
changes. should investigate to see if there's a code issue though the problem
persists back as far as at least 7.8 (on 64-bit Linux).
Modified Paths:
--------------
brlcad/trunk/TODO
Modified: brlcad/trunk/TODO
===================================================================
--- brlcad/trunk/TODO 2011-08-23 19:28:27 UTC (rev 46351)
+++ brlcad/trunk/TODO 2011-08-23 19:29:17 UTC (rev 46352)
@@ -58,6 +58,10 @@
THESE ARE UNSCHEDULED BACKLOG TASKS
-----------------------------------
+* investigate off-by-one errors from identical rt invocations.
+ running with -P1 results in no errors, parallel (on 64-bit Linux
+ RHEL) is giving many floating-point related errors.
+
* investigate why epa primitive is so sensitive to coarse absolute
value changes (run csgbrep, tol abs=1, facetize and get 321k poly)
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