Creanup Distant Terrain code

- Cull terrain in the stock osg::CullVisitor
- Do not compile composite maps for shadow camera
- Do not abuse userdata for composite maps

components/terrain/chunkmanager.cpp

@@ -30,7 +30,6 @@ ChunkManager::ChunkManager(Storage *storage, Resource::SceneManager *sceneMgr, T
     , mCompositeMapSize(512)
     , mCompositeMapLevel(1.f)
     , mMaxCompGeometrySize(1.f)
-    , mCullingActive(true)
 {
 
 }
@@ -208,7 +207,8 @@ osg::ref_ptr<osg::Node> ChunkManager::createChunk(float chunkSize, const osg::Ve
 
         mCompositeMapRenderer->addCompositeMap(compositeMap.get(), false);
 
-        transform->getOrCreateUserDataContainer()->setUserData(compositeMap);
+        geometry->setCompositeMap(compositeMap);
+        geometry->setCompositeMapRenderer(mCompositeMapRenderer);
 
         TextureLayer layer;
         layer.mDiffuseMap = compositeMap->mTexture;
@@ -222,14 +222,7 @@ osg::ref_ptr<osg::Node> ChunkManager::createChunk(float chunkSize, const osg::Ve
     }
 
     transform->addChild(geometry);
-
-    if (!mCullingActive)
-    {
-        transform->setCullingActive(false);
-        geometry->setCullingActive(false);
-    }
-    else
-        transform->getBound();
+    transform->getBound();
 
     if (mSceneManager->getIncrementalCompileOperation())
     {

components/terrain/quadtreenode.cpp

@@ -120,7 +120,7 @@ void QuadTreeNode::traverse(ViewData* vd, const osg::Vec3f& viewPoint, LodCallba
     bool stopTraversal = (lodCallback->isSufficientDetail(this, dist)) || !getNumChildren();
 
     if (stopTraversal)
-        vd->add(this, true);
+        vd->add(this);
     else
     {
         for (unsigned int i=0; i<getNumChildren(); ++i)
@@ -142,7 +142,7 @@ void QuadTreeNode::traverseTo(ViewData* vd, float size, const osg::Vec2f& center
     bool stopTraversal = (getSize() == size);
 
     if (stopTraversal)
-        vd->add(this, true);
+        vd->add(this);
     else
     {
         for (unsigned int i=0; i<getNumChildren(); ++i)
@@ -159,7 +159,7 @@ void QuadTreeNode::intersect(ViewData* vd, TerrainLineIntersector* intersector)
         return;
 
     if (getNumChildren() == 0)
-        vd->add(this, true);
+        vd->add(this);
     else
     {
         for (unsigned int i=0; i<getNumChildren(); ++i)

components/terrain/quadtreeworld.cpp

@@ -186,7 +186,7 @@ public:
         if (node->getSize() <= mMinSize)
         {
             // We arrived at a leaf.
-            // Since the tree is used for LOD level selection instead of culling, we do not need to load an actual height data here.
+            // Since the tree is used for LOD level selection instead of culling, we do not need to load the actual height data here.
             float minZ = -std::numeric_limits<float>::max();
             float maxZ = std::numeric_limits<float>::max();
             float cellWorldSize = mStorage->getCellWorldSize();
@@ -226,9 +226,6 @@ QuadTreeWorld::QuadTreeWorld(osg::Group *parent, osg::Group *compileRoot, Resour
     , mVertexLodMod(vertexLodMod)
     , mViewDistance(std::numeric_limits<float>::max())
 {
-    // No need for culling on the Drawable / Transform level as the quad tree performs the culling already.
-    mChunkManager->setCullingActive(false);
-
     mChunkManager->setCompositeMapSize(compMapResolution);
     mChunkManager->setCompositeMapLevel(compMapLevel);
     mChunkManager->setMaxCompositeGeometrySize(maxCompGeometrySize);
@@ -362,44 +359,25 @@ void QuadTreeWorld::accept(osg::NodeVisitor &nv)
         else
         {
             osgUtil::IntersectionVisitor* iv = static_cast<osgUtil::IntersectionVisitor*>(&nv);
-            osgUtil::LineSegmentIntersector* lineIntsersector = dynamic_cast<osgUtil::LineSegmentIntersector*>(iv->getIntersector());
-            if (!lineIntsersector)
-                throw std::runtime_error("Can not update QuadTreeWorld - the LineSegmentIntersector expected");
+            osgUtil::LineSegmentIntersector* lineIntersector = dynamic_cast<osgUtil::LineSegmentIntersector*>(iv->getIntersector());
+            if (!lineIntersector)
+                throw std::runtime_error("Cannot update QuadTreeWorld: node visitor is not LineSegmentIntersector");
 
             osg::Matrix matrix = osg::Matrix::identity();
-            if (lineIntsersector->getCoordinateFrame() == osgUtil::Intersector::CoordinateFrame::MODEL && iv->getModelMatrix() == 0)
-                matrix = lineIntsersector->getTransformation(*iv, osgUtil::Intersector::CoordinateFrame::MODEL);
-            osg::ref_ptr<TerrainLineIntersector> terrainIntersector (new TerrainLineIntersector(lineIntsersector, matrix));
+            if (lineIntersector->getCoordinateFrame() == osgUtil::Intersector::CoordinateFrame::MODEL && iv->getModelMatrix() == 0)
+                matrix = lineIntersector->getTransformation(*iv, osgUtil::Intersector::CoordinateFrame::MODEL);
+            osg::ref_ptr<TerrainLineIntersector> terrainIntersector (new TerrainLineIntersector(lineIntersector, matrix));
             mRootNode->intersect(vd, terrainIntersector);
         }
     }
 
-    if (isCullVisitor)
-    {
-        for (unsigned int i=0; i<vd->getNumEntries(); ++i)
-        {
-            ViewData::Entry& entry = vd->getEntry(i);
-            entry.set(entry.mNode, !static_cast<osgUtil::CullVisitor*>(&nv)->isCulled(entry.mNode->getBoundingBox()));
-        }
-    }
-
     for (unsigned int i=0; i<vd->getNumEntries(); ++i)
     {
         ViewData::Entry& entry = vd->getEntry(i);
 
         loadRenderingNode(entry, vd, mVertexLodMod, mChunkManager.get());
 
-        if (entry.mVisible)
-        {
-            osg::UserDataContainer* udc = entry.mRenderingNode->getUserDataContainer();
-            if (udc && udc->getUserData())
-            {
-                mCompositeMapRenderer->setImmediate(static_cast<CompositeMap*>(udc->getUserData()));
-                udc->setUserData(nullptr);
-
-            }
-            entry.mRenderingNode->accept(nv);
-        }
+        entry.mRenderingNode->accept(nv);
     }
 
     if (!isCullVisitor)

components/terrain/terraindrawable.cpp

@@ -4,13 +4,11 @@
 
 #include <components/sceneutil/lightmanager.hpp>
 
+#include "compositemaprenderer.hpp"
+
 namespace Terrain
 {
 
-TerrainDrawable::TerrainDrawable()
-{
-}
-
 TerrainDrawable::TerrainDrawable(const TerrainDrawable &copy, const osg::CopyOp &copyop)
     : osg::Geometry(copy, copyop)
     , mPasses(copy.mPasses)
@@ -63,6 +61,12 @@ void TerrainDrawable::cull(osgUtil::CullVisitor *cv)
         return;
     }
 
+    if (mCompositeMap)
+    {
+        mCompositeMapRenderer->setImmediate(mCompositeMap);
+        mCompositeMap = nullptr;
+    }
+
     bool pushedLight = mLightListCallback && mLightListCallback->pushLightState(this, cv);
 
     for (PassVector::const_iterator it = mPasses.begin(); it != mPasses.end(); ++it)

components/terrain/terraindrawable.hpp

@@ -16,6 +16,9 @@ namespace SceneUtil
 namespace Terrain
 {
 
+    class CompositeMap;
+    class CompositeMapRenderer;
+
     /**
      * Subclass of Geometry that supports built in multi-pass rendering and built in LightListCallback.
      */
@@ -28,7 +31,8 @@ namespace Terrain
         virtual const char* className() const { return "TerrainDrawable"; }
         virtual const char* libraryName() const { return "Terrain"; }
 
-        TerrainDrawable();
+        TerrainDrawable() = default;
+        ~TerrainDrawable() = default;
         TerrainDrawable(const TerrainDrawable& copy, const osg::CopyOp& copyop);
 
         virtual void accept(osg::NodeVisitor &nv);
@@ -41,10 +45,15 @@ namespace Terrain
 
         virtual void compileGLObjects(osg::RenderInfo& renderInfo) const;
 
+        void setCompositeMap(CompositeMap* map) { mCompositeMap = map; }
+        void setCompositeMapRenderer(CompositeMapRenderer* renderer) { mCompositeMapRenderer = renderer; }
+
     private:
         PassVector mPasses;
 
         osg::ref_ptr<SceneUtil::LightListCallback> mLightListCallback;
+        osg::ref_ptr<CompositeMap> mCompositeMap;
+        osg::ref_ptr<CompositeMapRenderer> mCompositeMapRenderer;
     };
 
 }

components/terrain/terraingrid.cpp

@@ -61,11 +61,6 @@ osg::ref_ptr<osg::Node> TerrainGrid::buildTerrain (osg::Group* parent, float chu
             return nullptr;
         if (parent)
             parent->addChild(node);
-
-        osg::UserDataContainer* udc = node->getUserDataContainer();
-        if (udc && udc->getUserData())
-            mCompositeMapRenderer->setImmediate(static_cast<CompositeMap*>(udc->getUserData()));
-
         return node;
     }
 }

components/terrain/viewdata.cpp

@@ -26,7 +26,7 @@ void ViewData::copyFrom(const ViewData& other)
     mViewPoint = other.mViewPoint;
 }
 
-void ViewData::add(QuadTreeNode *node, bool visible)
+void ViewData::add(QuadTreeNode *node)
 {
     unsigned int index = mNumEntries++;
 
@@ -34,7 +34,7 @@ void ViewData::add(QuadTreeNode *node, bool visible)
         mEntries.resize(index+1);
 
     Entry& entry = mEntries[index];
-    if (entry.set(node, visible))
+    if (entry.set(node))
         mChanged = true;
 }
 
@@ -73,7 +73,7 @@ void ViewData::reset()
 {
     // clear any unused entries
     for (unsigned int i=mNumEntries; i<mEntries.size(); ++i)
-        mEntries[i].set(nullptr, false);
+        mEntries[i].set(nullptr);
 
     // reset index for next frame
     mNumEntries = 0;
@@ -83,7 +83,7 @@ void ViewData::reset()
 void ViewData::clear()
 {
     for (unsigned int i=0; i<mEntries.size(); ++i)
-        mEntries[i].set(nullptr, false);
+        mEntries[i].set(nullptr);
     mNumEntries = 0;
     mLastUsageTimeStamp = 0;
     mChanged = false;
@@ -100,15 +100,13 @@ bool ViewData::contains(QuadTreeNode *node)
 
 ViewData::Entry::Entry()
     : mNode(nullptr)
-    , mVisible(true)
     , mLodFlags(0)
 {
 
 }
 
-bool ViewData::Entry::set(QuadTreeNode *node, bool visible)
+bool ViewData::Entry::set(QuadTreeNode *node)
 {
-    mVisible = visible;
     if (node == mNode)
         return false;
     else

components/terrain/viewdata.hpp

@@ -19,7 +19,7 @@ namespace Terrain
         ViewData();
         ~ViewData();
 
-        void add(QuadTreeNode* node, bool visible);
+        void add(QuadTreeNode* node);
 
         void reset();
 
@@ -33,10 +33,9 @@ namespace Terrain
         {
             Entry();
 
-            bool set(QuadTreeNode* node, bool visible);
+            bool set(QuadTreeNode* node);
 
             QuadTreeNode* mNode;
-            bool mVisible;
 
             unsigned int mLodFlags;
             osg::ref_ptr<osg::Node> mRenderingNode;