Avoid accessing Node::GetWorldTransform() in StaticModel::UpdateBatches() if possible to reduce cache misses when collecting drawables.

Source/Urho3D/Graphics/StaticModel.cpp

@@ -125,22 +125,16 @@ void StaticModel::ProcessRayQuery(const RayOctreeQuery& query, PODVector<RayQuer
 void StaticModel::UpdateBatches(const FrameInfo& frame)
 {
     const BoundingBox& worldBoundingBox = GetWorldBoundingBox();
-    const Matrix3x4& worldTransform = node_->GetWorldTransform();
     distance_ = frame.camera_->GetDistance(worldBoundingBox.Center());
 
     if (batches_.Size() > 1)
     {
+        const Matrix3x4& worldTransform = node_->GetWorldTransform();
         for (unsigned i = 0; i < batches_.Size(); ++i)
-        {
             batches_[i].distance_ = frame.camera_->GetDistance(worldTransform * geometryData_[i].center_);
-            batches_[i].worldTransform_ = &worldTransform;
-        }
     }
     else if (batches_.Size() == 1)
-    {
         batches_[0].distance_ = distance_;
-        batches_[0].worldTransform_ = &worldTransform;
-    }
 
     float scale = worldBoundingBox.Size().DotProduct(DOT_SCALE);
     float newLodDistance = frame.camera_->GetLodDistance(distance_, scale, lodBias_);
@@ -254,8 +248,10 @@ void StaticModel::SetModel(Model* model)
         SetNumGeometries(model->GetNumGeometries());
         const Vector<Vector<SharedPtr<Geometry> > >& geometries = model->GetGeometries();
         const PODVector<Vector3>& geometryCenters = model->GetGeometryCenters();
+        const Matrix3x4* worldTransform = node_ ? &node_->GetWorldTransform() : (const Matrix3x4*)0;
         for (unsigned i = 0; i < geometries.Size(); ++i)
         {
+            batches_[i].worldTransform_ = worldTransform;
             geometries_[i] = geometries[i];
             geometryData_[i].center_ = geometryCenters[i];
         }