Revision: 57022
http://sourceforge.net/p/brlcad/code/57022
Author: iiizzzaaakkk
Date: 2013-08-21 11:44:11 +0000 (Wed, 21 Aug 2013)
Log Message:
-----------
Added comment explaining the importance of the new constant 1.25 in
rt_hrt_prep()
Modified Paths:
--------------
brlcad/trunk/src/librt/primitives/hrt/hrt.c
Modified: brlcad/trunk/src/librt/primitives/hrt/hrt.c
===================================================================
--- brlcad/trunk/src/librt/primitives/hrt/hrt.c 2013-08-21 11:14:36 UTC (rev
57021)
+++ brlcad/trunk/src/librt/primitives/hrt/hrt.c 2013-08-21 11:44:11 UTC (rev
57022)
@@ -318,6 +318,7 @@
/* compute bounding sphere */
VMOVE(stp->st_center, hrt->hrt_V);
+ /* 1.0 stands for zdir vector and 0.25 takes care of displacement from
upper cusp to highest point of either lobe in the Z direction */
f = hip->zdir[Z] * 1.25;
stp->st_aradius = stp->st_bradius = sqrt(f);
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