Add some comments

components/sceneutil/riggeometry.hpp

@@ -10,6 +10,9 @@ namespace SceneUtil
     class Skeleton;
     class Bone;
 
+    /// @brief Mesh skinning implementation.
+    /// @note A RigGeometry may be attached directly to a Skeleton, or somewhere below a Skeleton.
+    /// Note though that the RigGeometry ignores any transforms below the Skeleton, so the attachment point is not that important.
     class RigGeometry : public osg::Geometry
     {
     public:
@@ -25,7 +28,6 @@ namespace SceneUtil
             std::map<short, float> mWeights;
         };
 
-
         struct InfluenceMap : public osg::Referenced
         {
             std::map<std::string, BoneInfluence> mMap;

components/sceneutil/skeleton.hpp

@@ -8,8 +8,8 @@
 namespace SceneUtil
 {
 
-    // Defines a Bone hierarchy, used for updating of skeleton-space bone matrices.
-    // To prevent unnecessary updates, only bones that are used for skinning will be added to this hierarchy.
+    /// @brief Defines a Bone hierarchy, used for updating of skeleton-space bone matrices.
+    /// @note To prevent unnecessary updates, only bones that are used for skinning will be added to this hierarchy.
     class Bone
     {
     public:
@@ -22,6 +22,7 @@ namespace SceneUtil
 
         std::vector<Bone*> mChildren;
 
+        /// Update the skeleton-space matrix of this bone and all its children.
         void update(const osg::Matrixf* parentMatrixInSkeletonSpace);
 
     private:
@@ -29,16 +30,21 @@ namespace SceneUtil
         void operator=(const Bone&);
     };
 
+    /// @brief Handles the bone matrices for any number of child RigGeometries.
+    /// @par Bones should be created as osg::MatrixTransform children of the skeleton.
+    /// To be a referenced by a RigGeometry, a bone needs to have a unique name.
     class Skeleton : public osg::Group
     {
     public:
         Skeleton();
         Skeleton(const Skeleton& copy, const osg::CopyOp& copyop);
 
-        Bone* getBone(const std::string& name);
-
         META_Node(NifOsg, Skeleton)
 
+        /// Retrieve a bone by name.
+        Bone* getBone(const std::string& name);
+
+        /// Request an update of bone matrices. May be a no-op if already updated in this frame.
         void updateBoneMatrices(osg::NodeVisitor* nv);
 
     private: