Added osgsimplifier example.

src/osgTerrain/DataSet.cpp

@@ -1924,7 +1924,7 @@ osg::Node* DataSet::DestinationTile::createPolygonal()
         return 0;
     }
 
-    bool createSkirt = true;
+    bool createSkirt = false;
 
     // compute sizes.
     unsigned int numColumns = grid->getNumColumns();
@@ -2184,7 +2184,7 @@ osg::Node* DataSet::DestinationTile::createPolygonal()
         geometry->setColorBinding(osg::Geometry::BIND_OVERALL);
     }
     
-#if 0
+#if 1
     osgUtil::Simplifier simplifier;
     simplifier.simplify(*geometry,0.5f);  // this will replace the normal vector with a new one
 #endif

src/osgUtil/Simplifier.cpp

@@ -52,7 +52,7 @@ public:
 
     void setTargetNumOfTriangles(unsigned int num) { _targetNumTriangles = num; }
 
-    unsigned int getNumOfTriangles() { return 0; }
+    unsigned int getNumOfTriangles() { return _triangleSet.size(); }
 
     Point* computeInterpolatedPoint(Edge* edge,float r) const
     {
@@ -1217,9 +1217,7 @@ void EdgeCollapse::copyBackToGeometry()
     std::cout<<"Number of edges= "<<_edgeSet.size()<<std::endl;
     std::cout<<"Number of boundary edges= "<<computeNumBoundaryEdges()<<std::endl;
 
-    float sampleRatio = 0.5;
-    unsigned int targetNumEdges = (unsigned int)((float)_edgeSet.size()*sampleRatio);
-    while (_edgeSet.size()>targetNumEdges)
+    while (_triangleSet.size()>_targetNumTriangles)
     {
         unsigned int numBefore = computeNumBoundaryEdges();
         bool result = collapseMinimumErrorEdge();