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diff --git a/dev/a4-dance/skeleton.h b/dev/a4-dance/skeleton.h
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-#ifndef SKELETON_H_
-#define SKELETON_H_
-
-#include <mingfx.h>
-using namespace mingfx;
-
-#include "simple_parser.h"
-
-
-/** This data structure describes a rigid body skeleton used to record and play
- back motion capture data.  Each skelton has a root node, which may have one or
- more child bones.  Each bone, may have zero or more child bones.
- 
- */
-class Skeleton {
-public:
-    
-    /// Creates an empty skeleton
-    Skeleton();
-    virtual ~Skeleton();
-    
-    /// Loads a skeleton from the Acclaim ASF file format.
-    void LoadFromASF(const std::string &asf_filename);
-
-    /// The number of bones attached to the root node
-    int num_root_bones() const;
-    
-    /// The name of the i-th bone attached to the root node
-    std::string root_bone(int i) const;
-
-    /// The number of children of the named bone
-    int num_children(const std::string &bone_name) const;
-    
-    /// The name of the i-th child of the named bone
-    std::string child_bone(const std::string &bone_name, int i) const;
-    
-    
-    /** The joint angle rotations that produce the animation are applied around
-     a set of x,y,z axes that make sense for the joint (e.g., a joint with
-     only 1 degree-of-freedom might setup a coordinate system where the X-axis
-     is aligned along the hinge of that joint).  The following transform
-     rotates the bone's local coordinate system into the joint angle coordinate
-     system.  This must be done before the joint angles can be applied.  Then,
-     after the joint angles are applied, we must rotate back before applying
-     the to_parent transform.
-     */
-    Matrix4 BoneSpaceToRotAxesSpace(const std::string &bone_name) const;
-
-    /** The inverse of BoneSpaceToRotAxesSpace().  Use this matrix to rotate 
-     back to the bone's local coordinate system after applying joint angle 
-     rotations. */
-    Matrix4 RotAxesSpaceToBoneSpace(const std::string &bone_name) const;
-    
-    /** This matrix transforms from the bone's local coordinate system to the
-     coordinate system of its children, which is the same as translating from
-     the bone's origin by the BoneDirectionAndLength() */
-    Matrix4 BoneSpaceToChildrenSpace(const std::string &bone_name) const;
-    
-    /** Returns the direction and length of the bone.  If you translate from the
-     bone's origin along this vector, you will reach the point that should be
-     used as the origin for the bone's children. */
-    Vector3 BoneDirectionAndLength(const std::string &bone_name) const;
-    
-    
-    
-    /* Most users will not need to access the routines below this line because
-       all of these properties are taken into account when calculating the
-       matrices above. */
-
-    /// True if the joint used to rotate bone_name can rotate around the X axis.
-    bool rx_dof(const std::string &bone_name) const;
-
-    /// Returns the valid range of X-axis joint angles for the joint used to rotate bone_name.
-    Vector2 rx_limits(const std::string &bone_name) const;
-    
-    /// True if the joint used to rotate bone_name can rotate around the Y axis.
-    bool ry_dof(const std::string &bone_name) const;
-
-    /// Returns the valid range of Y-axis joint angles for the joint used to rotate bone_name.
-    Vector2 ry_limits(const std::string &bone_name) const;
-    
-    /// True if the joint used to rotate bone_name can rotate around the Z axis.
-    bool rz_dof(const std::string &bone_name) const;
-    
-    /// Returns the valid range of Z-axis joint angles for the joint used to rotate bone_name.
-    Vector2 rz_limits(const std::string &bone_name) const;
-    
-    /// Returns 0,1,2 or 3 for the number of degrees of freedom of the joint
-    /// used to rotate the named bone.
-    int degrees_of_freedom(const std::string &bone_name) const;
-    
-    
-    /// Typically zero, and we can ignore this.
-    Vector3 skeleton_root_position() const;
-
-    /// Typically zero, and we can ignore this.
-    Vector3 skeleton_root_orientation() const;
-    
-    
-private:
-    bool using_degrees_;
-
-    std::vector<std::string> root_bones_;
-    Vector3 root_position_;
-    Vector3 root_orientation_;
-
-    std::map<std::string, int> ids_;
-    
-    std::map<std::string, std::vector<std::string> > children_;
-    std::map<std::string, Vector3> directions_;
-
-    std::map<std::string, float> lengths_;
-    
-    std::map<std::string, bool> rx_dof_;
-    std::map<std::string, Vector2> rx_limits_;
-    
-    std::map<std::string, bool> ry_dof_;
-    std::map<std::string, Vector2> ry_limits_;
-    
-    std::map<std::string, bool> rz_dof_;
-    std::map<std::string, Vector2> rz_limits_;
-    
-    std::map<std::string, Matrix4> bone_to_rot_axes_;
-    std::map<std::string, Matrix4> rot_axes_to_bone_;
-    std::map<std::string, Matrix4> bone_to_children_;
-    
-    
-    // Helpers for parsing skeleton data from file
-    void ParseUnits(SimpleParser *parser);
-    void ParseRoot(SimpleParser *parser);
-    void ParseBonedata(SimpleParser *parser);
-    void ParseBone(SimpleParser *parser, bool dg);
-    void ParseHierarchy(SimpleParser *parser);
-};
-
-#endif