Skip light collection for far away terrain

components/terrain/chunkmanager.cpp

@@ -10,6 +10,7 @@
 #include <components/resource/scenemanager.hpp>
 
 #include <components/sceneutil/positionattitudetransform.hpp>
+#include <components/sceneutil/lightmanager.hpp>
 
 #include "terraindrawable.hpp"
 #include "material.hpp"
@@ -178,6 +179,9 @@ osg::ref_ptr<osg::Node> ChunkManager::createChunk(float chunkSize, const osg::Ve
     geometry->setUseDisplayList(false);
     geometry->setUseVertexBufferObjects(true);
 
+    if (chunkSize <= 2.f)
+        geometry->setLightListCallback(new SceneUtil::LightListCallback);
+
     unsigned int numVerts = (mStorage->getCellVertices()-1) * chunkSize / (1 << lod) + 1;
 
     geometry->addPrimitiveSet(mBufferCache.getIndexBuffer(numVerts, lodFlags));

components/terrain/terraindrawable.cpp

@@ -9,7 +9,6 @@ namespace Terrain
 
 TerrainDrawable::TerrainDrawable()
 {
-    mLightListCallback = new SceneUtil::LightListCallback;
 }
 
 TerrainDrawable::TerrainDrawable(const TerrainDrawable &copy, const osg::CopyOp &copyop)
@@ -52,7 +51,7 @@ void TerrainDrawable::cull(osgUtil::CullVisitor *cv)
     if (osg::isNaN(depth))
         return;
 
-    bool pushedLight = mLightListCallback->pushLightState(this, cv);
+    bool pushedLight = mLightListCallback && mLightListCallback->pushLightState(this, cv);
 
     for (PassVector::const_iterator it = mPasses.begin(); it != mPasses.end(); ++it)
     {
@@ -70,6 +69,11 @@ void TerrainDrawable::setPasses(const TerrainDrawable::PassVector &passes)
     mPasses = passes;
 }
 
+void TerrainDrawable::setLightListCallback(SceneUtil::LightListCallback *lightListCallback)
+{
+    mLightListCallback = lightListCallback;
+}
+
 void TerrainDrawable::compileGLObjects(osg::RenderInfo &renderInfo) const
 {
     for (PassVector::const_iterator it = mPasses.begin(); it != mPasses.end(); ++it)

components/terrain/terraindrawable.hpp

@@ -37,6 +37,8 @@ namespace Terrain
         typedef std::vector<osg::ref_ptr<osg::StateSet> > PassVector;
         void setPasses (const PassVector& passes);
 
+        void setLightListCallback(SceneUtil::LightListCallback* lightListCallback);
+
         virtual void compileGLObjects(osg::RenderInfo& renderInfo) const;
 
     private: