Revision: 48407
http://brlcad.svn.sourceforge.net/brlcad/?rev=48407&view=rev
Author: starseeker
Date: 2012-01-11 17:32:53 +0000 (Wed, 11 Jan 2012)
Log Message:
-----------
Make sure we have pt_prev before proceeding to use it - CID 266
Modified Paths:
--------------
brlcad/trunk/src/libdm/dm-plot.c
Modified: brlcad/trunk/src/libdm/dm-plot.c
===================================================================
--- brlcad/trunk/src/libdm/dm-plot.c 2012-01-11 17:29:36 UTC (rev 48406)
+++ brlcad/trunk/src/libdm/dm-plot.c 2012-01-11 17:32:53 UTC (rev 48407)
@@ -242,6 +242,7 @@
pt_prev = pt;
continue;
} else {
+ if (pt_prev) {
fastf_t alpha;
vect_t diff;
point_t tmp_pt;
@@ -251,9 +252,11 @@
alpha = (dist_prev - delta) / (dist_prev -
dist);
VJOIN1(tmp_pt, *pt_prev, alpha, diff);
MAT4X3PNT(fin, plotmat, tmp_pt);
+ }
}
} else {
if (dist_prev <= 0.0) {
+ if (pt_prev) {
fastf_t alpha;
vect_t diff;
point_t tmp_pt;
@@ -264,6 +267,7 @@
VJOIN1(tmp_pt, *pt_prev, alpha, diff);
MAT4X3PNT(last, plotmat, tmp_pt);
MAT4X3PNT(fin, plotmat, *pt);
+ }
} else {
MAT4X3PNT(fin, plotmat, *pt);
}
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