Revision: 56830
http://sourceforge.net/p/brlcad/code/56830
Author: phoenixyjll
Date: 2013-08-14 07:16:36 +0000 (Wed, 14 Aug 2013)
Log Message:
-----------
Implement IsPointOnLoop() to determine whether a point is on the boundary of
the loop (using point-curve intersection)
Modified Paths:
--------------
brlcad/trunk/src/libbrep/boolean.cpp
Modified: brlcad/trunk/src/libbrep/boolean.cpp
===================================================================
--- brlcad/trunk/src/libbrep/boolean.cpp 2013-08-14 07:09:52 UTC (rev
56829)
+++ brlcad/trunk/src/libbrep/boolean.cpp 2013-08-14 07:16:36 UTC (rev
56830)
@@ -165,6 +165,9 @@
// -1: the input is not a valid loop
// 0: the point is not inside the loop or on boundary
// 1: the point is inside the loop or on boundary
+ // note:
+ // If you want to know whether this point is on boundary, please call
+ // IsPointOnLoop().
ON_PolyCurve polycurve;
if (!IsLoopValid(loop, ON_ZERO_TOLERANCE, &polycurve))
@@ -192,6 +195,23 @@
}
+HIDDEN int
+IsPointOnLoop(const ON_2dPoint& pt, const ON_SimpleArray<ON_Curve*>& loop)
+{
+ // returns:
+ // -1: the input is not a valid loop
+ // 0: the point is on the boundary of the loop
+ // 1: the point is not on the boundary of the loop
+
+ ON_PolyCurve polycurve;
+ if (!IsLoopValid(loop, ON_ZERO_TOLERANCE, &polycurve))
+ return -1;
+
+ ON_ClassArray<ON_PX_EVENT> px_event;
+ return ON_Intersect(ON_3dPoint(pt), polycurve, px_event, INTERSECTION_TOL)
? 1 : 0;
+}
+
+
HIDDEN void
link_curves(const ON_SimpleArray<ON_Curve*>& in, ON_SimpleArray<ON_Curve*>&
out)
{
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