Merge branch 'timoore/optimizations' into next

Some changes aimed at reducing the cost of the huge scene graph.

simgear/scene/model/ModelRegistry.cxx

@@ -314,7 +314,9 @@ OptimizeModelPolicy::OptimizeModelPolicy(const string& extension) :
     _osgOptions(Optimizer::SHARE_DUPLICATE_STATE
                 | Optimizer::MERGE_GEOMETRY
                 | Optimizer::FLATTEN_STATIC_TRANSFORMS
-                | Optimizer::TRISTRIP_GEOMETRY)
+                | Optimizer::INDEX_MESH
+                | Optimizer::VERTEX_POSTTRANSFORM
+                | Optimizer::VERTEX_PRETRANSFORM)
 {
 }
 

simgear/scene/model/animation.cxx

@@ -12,6 +12,7 @@
 #include <algorithm>
 #include <functional>
 
+#include <OpenThreads/Atomic>
 #include <OpenThreads/Mutex>
 #include <OpenThreads/ReentrantMutex>
 #include <OpenThreads/ScopedLock>
@@ -42,6 +43,7 @@
 #include <simgear/props/props.hxx>
 #include <simgear/structure/SGBinding.hxx>
 #include <simgear/scene/material/EffectGeode.hxx>
+#include <simgear/scene/material/EffectCullVisitor.hxx>
 #include <simgear/scene/util/OsgMath.hxx>
 #include <simgear/scene/util/SGNodeMasks.hxx>
 #include <simgear/scene/util/SGSceneUserData.hxx>
@@ -655,7 +657,9 @@ public:
                  SGExpressiond const* animationValue) :
     _condition(condition),
     _animationValue(animationValue)
-  { }
+  {
+      setName("SGTranslateAnimation::UpdateCallback");
+  }
   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
   {
     if (!_condition || _condition->test()) {
@@ -722,60 +726,129 @@ SGTranslateAnimation::createAnimationGroup(osg::Group& parent)
 // Implementation of rotate/spin animation
 ////////////////////////////////////////////////////////////////////////
 
-class SGRotateAnimation::UpdateCallback : public osg::NodeCallback {
+//Cull callback
+class RotAnimCallback : public osg::NodeCallback
+{
 public:
-  UpdateCallback(SGCondition const* condition,
-                 SGExpressiond const* animationValue) :
-    _condition(condition),
-    _animationValue(animationValue)
-  { }
-  virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
-  {
-    if (!_condition || _condition->test()) {
-      SGRotateTransform* transform;
-      transform = static_cast<SGRotateTransform*>(node);
-      transform->setAngleDeg(_animationValue->getValue());
-    }
-    traverse(node, nv);
-  }
+      RotAnimCallback(SGCondition const* condition,
+                      SGExpressiond const* animationValue,
+                      double initialValue = 0.0) :
+          _condition(condition),
+          _animationValue(animationValue),
+          _initialValue(initialValue),
+          _lastValue(0.0)
+    { }
+    virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
 public:
-  SGSharedPtr<SGCondition const> _condition;
-  SGSharedPtr<SGExpressiond const> _animationValue;
+    SGSharedPtr<SGCondition const> _condition;
+    SGSharedPtr<SGExpressiond const> _animationValue;
+    double _initialValue;
+    double _lastValue;
 };
 
-class SGRotateAnimation::SpinUpdateCallback : public osg::NodeCallback {
+void RotAnimCallback::operator()(osg::Node* node, osg::NodeVisitor* nv)
+{
+    using namespace osg;
+    SGRotateTransform* transform = static_cast<SGRotateTransform*>(node);
+    EffectCullVisitor* cv = dynamic_cast<EffectCullVisitor*>(nv);
+
+    if (!cv)
+        return;
+    double angle = 0.0;
+    if (!_condition || _condition->test()) {
+        angle = _animationValue->getValue() - _initialValue;
+        _lastValue = angle;
+    } else {
+        angle = _lastValue;
+    }
+    const SGVec3d& sgcenter = transform->getCenter();
+    const SGVec3d& sgaxis = transform->getAxis();
+    Matrixd mat = Matrixd::translate(-sgcenter[0], -sgcenter[1], -sgcenter[2])
+        * Matrixd::rotate(SGMiscd::deg2rad(angle), sgaxis[0], sgaxis[1], sgaxis[2])
+        * Matrixd::translate(sgcenter[0], sgcenter[1], sgcenter[2])
+        * *cv->getModelViewMatrix();
+    ref_ptr<RefMatrix> refmat = new RefMatrix(mat);
+    cv->pushModelViewMatrix(refmat.get(), transform->getReferenceFrame());
+    traverse(transform, nv);
+    cv->popModelViewMatrix();
+}
+
+// Cull callback
+class SpinAnimCallback : public osg::NodeCallback {
 public:
-  SpinUpdateCallback(SGCondition const* condition,
-                     SGExpressiond const* animationValue) :
+    SpinAnimCallback(SGCondition const* condition,
+                       SGExpressiond const* animationValue,
+          double initialValue = 0.0) :
     _condition(condition),
     _animationValue(animationValue),
-    _lastTime(-1)
-  { }
-  virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
-  {
-    if (!_condition || _condition->test()) {
-      SGRotateTransform* transform;
-      transform = static_cast<SGRotateTransform*>(node);
-
-      double t = nv->getFrameStamp()->getReferenceTime();
-      double dt = 0;
-      if (0 <= _lastTime)
-        dt = t - _lastTime;
-      _lastTime = t;
-      double velocity_rpms = _animationValue->getValue()/60;
-      double angle = transform->getAngleDeg();
-      angle += dt*velocity_rpms*360;
-      angle -= 360*floor(angle/360);
-      transform->setAngleDeg(angle);
-    }
-    traverse(node, nv);
-  }
+    _initialValue(initialValue)
+    {}
+    virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
 public:
-  SGSharedPtr<SGCondition const> _condition;
-  SGSharedPtr<SGExpressiond const> _animationValue;
-  double _lastTime;
+    SGSharedPtr<SGCondition const> _condition;
+    SGSharedPtr<SGExpressiond const> _animationValue;
+    double _initialValue;
+protected:
+    // This cull callback can run in different threads if there is
+    // more than one camera. It is probably safe to overwrite the
+    // reference values in multiple threads, but we'll provide a
+    // threadsafe way to manage those values just to be safe.
+    struct ReferenceValues {
+        ReferenceValues(double t, double rot, double vel)
+            : _time(t), _rotation(rot), _rotVelocity(vel)
+        {
+        }
+        double _time;
+        double _rotation;
+        double _rotVelocity;
+    };
+    OpenThreads::AtomicPtr _referenceValues;
 };
 
+void SpinAnimCallback::operator()(osg::Node* node, osg::NodeVisitor* nv)
+{
+    using namespace osg;
+    SGRotateTransform* transform = static_cast<SGRotateTransform*>(node);
+    EffectCullVisitor* cv = dynamic_cast<EffectCullVisitor*>(nv);
+    if (!cv)
+        return;
+    if (!_condition || _condition->test()) {
+        double t = nv->getFrameStamp()->getReferenceTime();
+        double rps = _animationValue->getValue() / 60.0;
+        ReferenceValues* refval = static_cast<ReferenceValues*>(_referenceValues.get());
+        if (!refval || refval->_rotVelocity != rps) {
+            ReferenceValues* newref = 0;
+            if (!refval) {
+                // initialization
+                newref = new ReferenceValues(t, 0.0, rps);
+            } else {
+                double newRot = refval->_rotation + (t - refval->_time) * refval->_rotVelocity;
+                newref = new ReferenceValues(t, newRot, rps);
+            }
+            if (_referenceValues.assign(newref, refval)) {
+                delete refval;
+            }
+            refval = newref;
+        }
+        double rotation = refval->_rotation + (t - refval->_time) * rps;
+        double intPart;
+        double rot = modf(rotation, &intPart);
+        double angle = rot * 2.0 * osg::PI;
+        const SGVec3d& sgcenter = transform->getCenter();
+        const SGVec3d& sgaxis = transform->getAxis();
+        Matrixd mat = Matrixd::translate(-sgcenter[0], -sgcenter[1], -sgcenter[2])
+            * Matrixd::rotate(angle, sgaxis[0], sgaxis[1], sgaxis[2])
+            * Matrixd::translate(sgcenter[0], sgcenter[1], sgcenter[2])
+            * *cv->getModelViewMatrix();
+        ref_ptr<RefMatrix> refmat = new RefMatrix(mat);
+        cv->pushModelViewMatrix(refmat.get(), transform->getReferenceFrame());
+        traverse(transform, nv);
+        cv->popModelViewMatrix();
+    } else {
+        traverse(transform, nv);
+    }
+}
+
 SGRotateAnimation::SGRotateAnimation(const SGPropertyNode* configNode,
                                      SGPropertyNode* modelRoot) :
   SGAnimation(configNode, modelRoot)
@@ -792,7 +865,6 @@ SGRotateAnimation::SGRotateAnimation(const SGPropertyNode* configNode,
     _initialValue = _animationValue->getValue();
   else
     _initialValue = 0;
-
   _center = SGVec3d::zeros();
   if (configNode->hasValue("axis/x1-m")) {
     SGVec3d v1, v2;
@@ -823,12 +895,12 @@ SGRotateAnimation::createAnimationGroup(osg::Group& parent)
   SGRotateTransform* transform = new SGRotateTransform;
   transform->setName("rotate animation");
   if (_isSpin) {
-    SpinUpdateCallback* uc;
-    uc = new SpinUpdateCallback(_condition, _animationValue);
-    transform->setUpdateCallback(uc);
+    SpinAnimCallback* cc;
+    cc = new SpinAnimCallback(_condition, _animationValue, _initialValue);
+    transform->setCullCallback(cc);
   } else if (_animationValue || !_animationValue->isConst()) {
-    UpdateCallback* uc = new UpdateCallback(_condition, _animationValue);
-    transform->setUpdateCallback(uc);
+      RotAnimCallback* cc = new RotAnimCallback(_condition, _animationValue, _initialValue);
+      transform->setCullCallback(cc);
   }
   transform->setCenter(_center);
   transform->setAxis(_axis);
@@ -851,6 +923,7 @@ public:
     _animationValue[0] = animationValue[0];
     _animationValue[1] = animationValue[1];
     _animationValue[2] = animationValue[2];
+    setName("SGScaleAnimation::UpdateCallback");
   }
   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
   {
@@ -1373,7 +1446,9 @@ public:
     _maxAnimationValue(maxAnimationValue),
     _minStaticValue(minValue),
     _maxStaticValue(maxValue)
-  {}
+  {
+      setName("SGRangeAnimation::UpdateCallback");
+  }
   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
   {
     osg::LOD* lod = static_cast<osg::LOD*>(node);
@@ -1629,7 +1704,9 @@ public:
   UpdateCallback(const SGPropertyNode* configNode, const SGExpressiond* v) :
     _prev_value(-1),
     _animationValue(v)
-  { }
+  {
+      setName("SGBlendAnimation::UpdateCallback");
+  }
   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
   {
     double blend = _animationValue->getValue();
@@ -1708,6 +1785,7 @@ public:
                                        rNode->getDoubleValue( "max", 1));
       }
     }
+    setName("SGTimedAnimation::UpdateCallback");
   }
   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
   {
@@ -1796,7 +1874,9 @@ class SGShadowAnimation::UpdateCallback : public osg::NodeCallback {
 public:
   UpdateCallback(const SGCondition* condition) :
     _condition(condition)
-  {}
+  {
+      setName("SGShadowAnimation::UpdateCallback");
+  }
   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
   {
     if (_condition->test())
@@ -1889,7 +1969,9 @@ class SGTexTransformAnimation::UpdateCallback :
 public:
   UpdateCallback(const SGCondition* condition) :
     _condition(condition)
-  { }
+  {
+      setName("SGTexTransformAnimation::UpdateCallback");
+  }
   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor*)
   {
     if (!_condition || _condition->test()) {

simgear/scene/model/animation.hxx

@@ -136,8 +136,6 @@ public:
                     SGPropertyNode* modelRoot);
   virtual osg::Group* createAnimationGroup(osg::Group& parent);
 private:
-  class UpdateCallback;
-  class SpinUpdateCallback;
   SGSharedPtr<const SGCondition> _condition;
   SGSharedPtr<const SGExpressiond> _animationValue;
   SGVec3d _axis;

simgear/scene/tgdb/TreeBin.cxx

@@ -35,6 +35,7 @@
 #include <osg/Math>
 #include <osg/MatrixTransform>
 #include <osg/Matrix>
+#include <osg/NodeVisitor>
 
 #include <osgDB/ReadFile>
 #include <osgDB/FileUtils>
@@ -281,6 +282,42 @@ struct TreeTransformer
     Matrix mat;
 };
 
+// We may end up with a quadtree with many empty leaves. One might say
+// that we should avoid constructing the leaves in the first place,
+// but this node visitor tries to clean up after the fact.
+
+struct QuadTreeCleaner : public osg::NodeVisitor
+{
+    QuadTreeCleaner() : NodeVisitor(NodeVisitor::TRAVERSE_ALL_CHILDREN)
+    {
+    }
+    void apply(LOD& lod)
+    {
+        for (int i  = lod.getNumChildren() - 1; i >= 0; --i) {
+            EffectGeode* geode = dynamic_cast<EffectGeode*>(lod.getChild(i));
+            if (!geode)
+                continue;
+            bool geodeEmpty = true;
+            for (unsigned j = 0; j < geode->getNumDrawables(); ++j) {
+                const Geometry* geom = dynamic_cast<Geometry*>(geode->getDrawable(j));
+                if (!geom) {
+                    geodeEmpty = false;
+                    break;
+                }
+                for (unsigned k = 0; k < geom->getNumPrimitiveSets(); k++) {
+                    const PrimitiveSet* ps = geom->getPrimitiveSet(k);
+                    if (ps->getNumIndices() > 0) {
+                        geodeEmpty = false;
+                        break;
+                    }
+                }
+            }
+            if (geodeEmpty)
+                lod.removeChildren(i, 1);
+        }
+    }
+};
+
 // This actually returns a MatrixTransform node. If we rotate the whole
 // forest into the local Z-up coordinate system we can reuse the
 // primitive tree geometry for all the forests of the same type.
@@ -342,8 +379,10 @@ osg::Group* createForest(SGTreeBinList& forestList, const osg::Matrix& transform
     }
     
     forestList.clear();
-    
+    QuadTreeCleaner cleaner;
+    mt->accept(cleaner);
     return mt;
 }
 
+
 }