Revision: 51750
http://brlcad.svn.sourceforge.net/brlcad/?rev=51750&view=rev
Author: phoenixyjll
Date: 2012-08-02 08:59:00 +0000 (Thu, 02 Aug 2012)
Log Message:
-----------
Add a function to deal with curve-curve intersection.
Modified Paths:
--------------
brlcad/trunk/src/librt/primitives/brep/brep.cpp
Modified: brlcad/trunk/src/librt/primitives/brep/brep.cpp
===================================================================
--- brlcad/trunk/src/librt/primitives/brep/brep.cpp 2012-08-02 08:57:44 UTC
(rev 51749)
+++ brlcad/trunk/src/librt/primitives/brep/brep.cpp 2012-08-02 08:59:00 UTC
(rev 51750)
@@ -3228,6 +3228,33 @@
int
+curve_intersect(const ON_NurbsCurve *curveA, const ON_NurbsCurve *curveB,
ON_3dPointArray *intersect)
+{
+ int countA = curveA->CVCount();
+ int countB = curveB->CVCount();
+ for (int i = 0; i < countA - 1; i++) {
+ ON_3dPoint fromA, toA;
+ curveA->GetCV(i, fromA);
+ curveA->GetCV(i + 1, toA);
+ ON_Line lineA(fromA, toA);
+ for (int j = 0; j < countB - 1; j++) {
+ ON_3dPoint fromB, toB;
+ curveB->GetCV(j, fromB);
+ curveB->GetCV(j + 1, toB);
+ ON_Line lineB(fromB, toB);
+ double tA, tB;
+ if (ON_Intersect(lineA, lineB, &tA, &tB) != true)
+ continue;
+ if (tA >= 0.0 && tA <= 1.0 && tB >= 0.0 && tB <= 1.0) {
+ intersect->Append(lineA.PointAt(tA));
+ }
+ }
+ }
+ return 0;
+}
+
+
+int
rt_brep_boolean(struct rt_db_internal *out, const struct rt_db_internal *ip1,
const struct rt_db_internal *ip2, const int UNUSED(operation))
{
RT_CK_DB_INTERNAL(ip1);
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