Moved osgUtil::PolytopeIntersector, osgUtil::PlaneIntersector and osgUtil::LineSegmentIntersector out from include/osgUtil/IntersecionVisitor into their own seperate files.

src/osgSim/ElevationSlice.cpp

@@ -15,6 +15,7 @@
 #include <osgSim/ElevationSlice>
 
 #include <osg/Notify>
+#include <osgUtil/PlaneIntersector>
 
 using namespace osgSim;
 

src/osgSim/HeightAboveTerrain.cpp

@@ -15,6 +15,7 @@
 #include <osgSim/HeightAboveTerrain>
 
 #include <osg/Notify>
+#include <osgUtil/LineSegmentIntersector>
 
 using namespace osgSim;
 

src/osgSim/LineOfSight.cpp

@@ -14,8 +14,8 @@
 #include <osgSim/LineOfSight>
 
 #include <osg/Notify>
-
 #include <osgDB/ReadFile>
+#include <osgUtil/LineSegmentIntersector>
 
 using namespace osgSim;