From dbc3dbc5fad7288b9ce9b4f7f28c4555cc42d9ab Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 1 Apr 2004 13:09:05 +0000
Subject: [PATCH] Added scaling of the PagedLOD range to be relative to the
 radius of children.

---
 include/osgTerrain/DataSet |  6 +++++-
 src/osgTerrain/DataSet.cpp | 13 ++++++++++---
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/include/osgTerrain/DataSet b/include/osgTerrain/DataSet
index f06c699bb..facd6aa35 100644
--- a/include/osgTerrain/DataSet
+++ b/include/osgTerrain/DataSet
@@ -839,7 +839,9 @@ class DataSet : public osg::Referenced
 
         void loadSources();
         
-        
+        void setRadiusToMaxVisibleDistanceRatio(float ratio) { _radiusToMaxVisibleDistanceRatio = ratio; }
+        float getRadiusToMaxVisibleDistanceRatio() const { return _radiusToMaxVisibleDistanceRatio; }
+	
         void setVerticalScale(float verticalScale) { _verticalScale = verticalScale; }
         float getVerticalScale() const { return _verticalScale; }
                
@@ -935,6 +937,8 @@ class DataSet : public osg::Referenced
         
         QuadMap                                     _quadMap;
 
+
+	float                                       _radiusToMaxVisibleDistanceRatio;
         float                                       _verticalScale;
             
         osg::ref_ptr<osgTerrain::CoordinateSystem>  _destinationCoordinateSystem;
diff --git a/src/osgTerrain/DataSet.cpp b/src/osgTerrain/DataSet.cpp
index b38aed40b..24d71c979 100644
--- a/src/osgTerrain/DataSet.cpp
+++ b/src/osgTerrain/DataSet.cpp
@@ -2410,7 +2410,7 @@ osg::Node* DataSet::CompositeDestination::createPagedLODScene()
     float farDistance = 1e8;
     if (tileNodes.size()==1)
     {
-        pagedLOD->addChild(tileNodes.front(),cutOffDistance,farDistance);
+        pagedLOD->addChild(tileNodes.front());
     }
     else if (tileNodes.size()>1)
     {
@@ -2421,9 +2421,13 @@ osg::Node* DataSet::CompositeDestination::createPagedLODScene()
         {
             group->addChild(*itr);
         }
-        pagedLOD->addChild(group,cutOffDistance,farDistance);
+        pagedLOD->addChild(group);
     }
     
+    cutOffDistance = pagedLOD->getBound().radius()*_dataSet->getRadiusToMaxVisibleDistanceRatio();
+    
+    pagedLOD->setRange(0,cutOffDistance,farDistance);
+    
     pagedLOD->setFileName(1,getSubTileName());
     pagedLOD->setRange(1,0,cutOffDistance);
     
@@ -2499,6 +2503,9 @@ DataSet::DataSet()
 {
     init();
     
+    _radiusToMaxVisibleDistanceRatio = 11.0f;
+    _verticalScale = 1.0f;
+
     _convertFromGeographicToGeocentric = false;
     
     _defaultColor.set(0.5f,0.5f,1.0f,1.0f);
@@ -2557,7 +2564,7 @@ DataSet::CompositeDestination* DataSet::createDestinationGraph(CompositeDestinat
 
     DataSet::CompositeDestination* destinationGraph = new DataSet::CompositeDestination(cs,extents);
 
-    destinationGraph->_maxVisibleDistance = extents.radius()*11.0f;
+    destinationGraph->_maxVisibleDistance = extents.radius()*getRadiusToMaxVisibleDistanceRatio();
 
     // first create the topmost tile