/* 
Copyright © 2016 NaturalPoint Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License. 
*/

using System;
using System.Collections.Generic;
using UnityEngine;


/// <summary>
/// Implements live retargeting of streamed OptiTrack skeletal data via Mecanim.
/// Add this component to an imported model GameObject that has a properly configured humanoid Avatar definition.
/// </summary>
/// <remarks>
/// A hierarchy of GameObjects (see <see cref="m_rootObject"/> and <see cref="m_boneObjectMap"/>) will be created to
/// receive the streaming pose data for the skeleton asset specified by <see cref="SkeletonAssetName"/>.
/// A source Avatar will be created automatically from the streamed skeleton definition.
/// </remarks>
public class OptitrackSkeletonAnimator : MonoBehaviour
{
    /// <summary>The client object to use for receiving streamed skeletal pose data.</summary>
    [Tooltip("The object containing the OptiTrackStreamingClient script.")]
    public OptitrackStreamingClient StreamingClient;

    /// <summary>The name of the skeleton asset in the stream that will provide retargeting source data.</summary>
    [Tooltip("The name of skeleton asset in Motive.")]
    public string SkeletonAssetName = "Skeleton1";

    /// <summary>The humanoid avatar for this GameObject's imported model.</summary>
    [Tooltip("The humanoid avatar model.")]
    public Avatar DestinationAvatar;

    #region Private fields
    /// <summary>Used when retrieving and retargeting source pose. Cached and reused for efficiency.</summary>
    private HumanPose m_humanPose = new HumanPose();

    /// <summary>The streamed source skeleton definition.</summary>
    private OptitrackSkeletonDefinition m_skeletonDef;

    /// <summary>The root GameObject of the streamed skeletal pose transform hierarchy.</summary>
    private GameObject m_rootObject;

    /// <summary>Maps between OptiTrack skeleton bone IDs and corresponding GameObjects.</summary>
    private Dictionary<Int32, GameObject> m_boneObjectMap;

    /// <summary>
    /// Maps between Mecanim anatomy bone names (keys) and streamed bone names from various naming conventions
    /// supported by the OptiTrack software (values). Populated by <see cref="CacheBoneNameMap"/>.
    /// </summary>
    private Dictionary<string, string> m_cachedMecanimBoneNameMap = new Dictionary<string, string>();

    /// <summary>Created automatically based on <see cref="m_skeletonDef"/>.</summary>
    private Avatar m_srcAvatar;

    /// <summary>Set up to read poses from our streamed GameObject transform hierarchy.</summary>
    private HumanPoseHandler m_srcPoseHandler;

    /// <summary>Set up to write poses to this GameObject using <see cref="DestinationAvatar"/>.</summary>
    private HumanPoseHandler m_destPoseHandler;
    #endregion Private fields

    void Start()
    {
        // If the user didn't explicitly associate a client, find a suitable default.
        if ( this.StreamingClient == null )
        {
            this.StreamingClient = OptitrackStreamingClient.FindDefaultClient();

            // If we still couldn't find one, disable this component.
            if ( this.StreamingClient == null )
            {
                Debug.LogError( GetType().FullName + ": Streaming client not set, and no " + typeof( OptitrackStreamingClient ).FullName + " components found in scene; disabling this component.", this );
                this.enabled = false;
                return;
            }
        }

        this.StreamingClient.RegisterSkeleton(this, this.SkeletonAssetName);

        // Create a lookup from Mecanim anatomy bone names to OptiTrack streaming bone names.
        CacheBoneNameMap( this.StreamingClient.BoneNamingConvention, this.SkeletonAssetName );

        // Retrieve the OptiTrack skeleton definition.
        m_skeletonDef = this.StreamingClient.GetSkeletonDefinitionByName( this.SkeletonAssetName );

        if ( m_skeletonDef == null )
        {
            Debug.LogError( GetType().FullName + ": Could not find skeleton definition with the name \"" + this.SkeletonAssetName + "\"", this );
            this.enabled = false;
            return;
        }

        // Create a hierarchy of GameObjects that will receive the skeletal pose data.
        string rootObjectName = "OptiTrack Skeleton - " + this.SkeletonAssetName;
        m_rootObject = new GameObject( rootObjectName );

        m_boneObjectMap = new Dictionary<Int32, GameObject>( m_skeletonDef.Bones.Count );

        for ( int boneDefIdx = 0; boneDefIdx < m_skeletonDef.Bones.Count; ++boneDefIdx )
        {
            OptitrackSkeletonDefinition.BoneDefinition boneDef = m_skeletonDef.Bones[boneDefIdx];

            GameObject boneObject = new GameObject( boneDef.Name );
            boneObject.transform.parent = boneDef.ParentId == 0 ? m_rootObject.transform : m_boneObjectMap[boneDef.ParentId].transform;
            boneObject.transform.localPosition = boneDef.Offset;
            m_boneObjectMap[boneDef.Id] = boneObject;
        }

        // Hook up retargeting between those GameObjects and the destination Avatar.
        MecanimSetup( rootObjectName );

        // Can't re-parent this until after Mecanim setup, or else Mecanim gets confused.
        m_rootObject.transform.parent = this.StreamingClient.transform;
        m_rootObject.transform.localPosition = Vector3.zero;
        m_rootObject.transform.localRotation = Quaternion.identity;
    }


    void Update()
    {
        OptitrackSkeletonState skelState = StreamingClient.GetLatestSkeletonState( m_skeletonDef.Id );
        if ( skelState != null )
        {
            // Update the transforms of the bone GameObjects.
            for ( int i = 0; i < m_skeletonDef.Bones.Count; ++i )
            {
                Int32 boneId = m_skeletonDef.Bones[i].Id;

                OptitrackPose bonePose;
                GameObject boneObject;

                bool foundPose = false;
                if (StreamingClient.SkeletonCoordinates == StreamingCoordinatesValues.Global)
                {
                    // Use global skeleton coordinates
                    foundPose = skelState.LocalBonePoses.TryGetValue(boneId, out bonePose);
                }
                else
                {
                    // Use local skeleton coordinates
                    foundPose = skelState.BonePoses.TryGetValue(boneId, out bonePose);
                }

                bool foundObject = m_boneObjectMap.TryGetValue( boneId, out boneObject );
                
                if (foundPose && foundObject)
                {
                    boneObject.transform.localPosition = bonePose.Position;
                    boneObject.transform.localRotation = bonePose.Orientation;
                }
            }

            // Perform Mecanim retargeting.
            if ( m_srcPoseHandler != null && m_destPoseHandler != null )
            {
                // Interpret the streamed pose into Mecanim muscle space representation.
                m_srcPoseHandler.GetHumanPose( ref m_humanPose );

                // Re-target that muscle space pose to the destination avatar.
                m_destPoseHandler.SetHumanPose( ref m_humanPose );
            }
        }
    }


    #region Private methods
    /// <summary>
    /// Constructs the source Avatar and pose handlers for Mecanim retargeting.
    /// </summary>
    /// <param name="rootObjectName"></param>
    private void MecanimSetup( string rootObjectName )
    {
        string[] humanTraitBoneNames = HumanTrait.BoneName;

        // Set up the mapping between Mecanim human anatomy and OptiTrack skeleton representations.
        List<HumanBone> humanBones = new List<HumanBone>( m_skeletonDef.Bones.Count );
        for ( int humanBoneNameIdx = 0; humanBoneNameIdx < humanTraitBoneNames.Length; ++humanBoneNameIdx )
        {
            string humanBoneName = humanTraitBoneNames[humanBoneNameIdx];
            if ( m_cachedMecanimBoneNameMap.ContainsKey( humanBoneName ) )
            {
                HumanBone humanBone = new HumanBone();
                humanBone.humanName = humanBoneName;
                humanBone.boneName = m_cachedMecanimBoneNameMap[humanBoneName];
                humanBone.limit.useDefaultValues = true;

                humanBones.Add( humanBone );
            }
        }

        // Set up the T-pose and game object name mappings.
        List<SkeletonBone> skeletonBones = new List<SkeletonBone>( m_skeletonDef.Bones.Count + 1 );

        // Special case: Create the root bone.
        {
            SkeletonBone rootBone = new SkeletonBone();
            rootBone.name = rootObjectName;
            rootBone.position = Vector3.zero;
            rootBone.rotation = Quaternion.identity;
            rootBone.scale = Vector3.one;

            skeletonBones.Add( rootBone );
        }

        // Create remaining re-targeted bone definitions.
        for ( int boneDefIdx = 0; boneDefIdx < m_skeletonDef.Bones.Count; ++boneDefIdx )
        {
            OptitrackSkeletonDefinition.BoneDefinition boneDef = m_skeletonDef.Bones[boneDefIdx];

            SkeletonBone skelBone = new SkeletonBone();
            skelBone.name = boneDef.Name;
            skelBone.position = boneDef.Offset;
            skelBone.rotation = RemapBoneRotation(boneDef.Name); //Identity unless it's the thumb bone. 
            skelBone.scale = Vector3.one;

            skeletonBones.Add( skelBone );
        }

        // Now set up the HumanDescription for the retargeting source Avatar.
        HumanDescription humanDesc = new HumanDescription();
        humanDesc.human = humanBones.ToArray();
        humanDesc.skeleton = skeletonBones.ToArray();

        // These all correspond to default values.
        humanDesc.upperArmTwist = 0.5f;
        humanDesc.lowerArmTwist = 0.5f;
        humanDesc.upperLegTwist = 0.5f;
        humanDesc.lowerLegTwist = 0.5f;
        humanDesc.armStretch = 0.05f;
        humanDesc.legStretch = 0.05f;
        humanDesc.feetSpacing = 0.0f;
        humanDesc.hasTranslationDoF = false;

        // Finally, take the description and build the Avatar and pose handlers.
        m_srcAvatar = AvatarBuilder.BuildHumanAvatar( m_rootObject, humanDesc );

        if ( m_srcAvatar.isValid == false || m_srcAvatar.isHuman == false )
        {
            Debug.LogError( GetType().FullName + ": Unable to create source Avatar for retargeting. Check that your Skeleton Asset Name and Bone Naming Convention are configured correctly.", this );
            this.enabled = false;
            return;
        }

        m_srcPoseHandler = new HumanPoseHandler( m_srcAvatar, m_rootObject.transform );
        m_destPoseHandler = new HumanPoseHandler( DestinationAvatar, this.transform );
    }


    /// <summary>
    /// Adjusts default position of the proximal thumb bones. 
    /// The default pose between Unity and Motive differs on the thumb, this fixes that difference. 
    /// </summary>
    /// <param name="boneName">The name of the current bone.</param>
    private Quaternion RemapBoneRotation(string boneName)
    {
        if (this.StreamingClient.BoneNamingConvention == OptitrackBoneNameConvention.Motive)
        {
            if (boneName.EndsWith("_LThumb1"))
            {
                // 60 Deg Y-Axis rotation
                return new Quaternion(0.0f, 0.5000011f, 0.0f, 0.8660248f);
            }
            if (boneName.EndsWith("_RThumb1"))
            {
                // -60 Deg Y-Axis rotation
                return new Quaternion(0.0f, -0.5000011f, 0.0f, 0.8660248f);
            }
        }
        if (this.StreamingClient.BoneNamingConvention == OptitrackBoneNameConvention.FBX)
        {
            if (boneName.EndsWith("_LeftHandThumb1"))
            {
                // 60 Deg Y-Axis rotation
                return new Quaternion(0.0f, 0.5000011f, 0.0f, 0.8660248f);
            }
            if (boneName.EndsWith("_RightHandThumb1"))
            {
                // -60 Deg Y-Axis rotation
                return new Quaternion(0.0f, -0.5000011f, 0.0f, 0.8660248f);
            }
        }
        if (this.StreamingClient.BoneNamingConvention == OptitrackBoneNameConvention.BVH)
        {
            if (boneName.EndsWith("_LeftFinger0"))
            {
                // 60 Deg Y-Axis rotation
                return new Quaternion(0.0f, 0.5000011f, 0.0f, 0.8660248f);
            }
            if (boneName.EndsWith("_RightFinger0"))
            {
                // -60 Deg Y-Axis rotation
                return new Quaternion(0.0f, -0.5000011f, 0.0f, 0.8660248f);
            }
        }

        return Quaternion.identity;
    }


    /// <summary>
    /// Updates the <see cref="m_cachedMecanimBoneNameMap"/> lookup to reflect the specified bone naming convention
    /// and source skeleton asset name.
    /// </summary>
    /// <param name="convention">The bone naming convention to use. Must match the host software.</param>
    /// <param name="assetName">The name of the source skeleton asset.</param>
    private void CacheBoneNameMap( OptitrackBoneNameConvention convention, string assetName )
    {
        m_cachedMecanimBoneNameMap.Clear();

        switch ( convention )
        {
            case OptitrackBoneNameConvention.Motive:
                m_cachedMecanimBoneNameMap.Add( "Hips",             assetName + "_Hip" );
                m_cachedMecanimBoneNameMap.Add( "Spine",            assetName + "_Ab" );
                m_cachedMecanimBoneNameMap.Add( "Chest",            assetName + "_Chest" );
                m_cachedMecanimBoneNameMap.Add( "Neck",             assetName + "_Neck" );
                m_cachedMecanimBoneNameMap.Add( "Head",             assetName + "_Head" );

                m_cachedMecanimBoneNameMap.Add( "LeftShoulder",     assetName + "_LShoulder" );
                m_cachedMecanimBoneNameMap.Add( "LeftUpperArm",     assetName + "_LUArm" );
                m_cachedMecanimBoneNameMap.Add( "LeftLowerArm",     assetName + "_LFArm" );
                m_cachedMecanimBoneNameMap.Add( "LeftHand",         assetName + "_LHand" );

                m_cachedMecanimBoneNameMap.Add( "RightShoulder",    assetName + "_RShoulder" );
                m_cachedMecanimBoneNameMap.Add( "RightUpperArm",    assetName + "_RUArm" );
                m_cachedMecanimBoneNameMap.Add( "RightLowerArm",    assetName + "_RFArm" );
                m_cachedMecanimBoneNameMap.Add( "RightHand",        assetName + "_RHand" );

                m_cachedMecanimBoneNameMap.Add( "LeftUpperLeg",     assetName + "_LThigh" );
                m_cachedMecanimBoneNameMap.Add( "LeftLowerLeg",     assetName + "_LShin" );
                m_cachedMecanimBoneNameMap.Add( "LeftFoot",         assetName + "_LFoot" );
                m_cachedMecanimBoneNameMap.Add( "LeftToeBase",      assetName + "_LToe" );

                m_cachedMecanimBoneNameMap.Add( "RightUpperLeg",    assetName + "_RThigh" );
                m_cachedMecanimBoneNameMap.Add( "RightLowerLeg",    assetName + "_RShin" );
                m_cachedMecanimBoneNameMap.Add( "RightFoot",        assetName + "_RFoot" );
                m_cachedMecanimBoneNameMap.Add( "RightToeBase",     assetName + "_RToe" );


                m_cachedMecanimBoneNameMap.Add( "Left Thumb Proximal",      assetName + "_LThumb1" );
                m_cachedMecanimBoneNameMap.Add( "Left Thumb Intermediate",  assetName + "_LThumb2" );
                m_cachedMecanimBoneNameMap.Add( "Left Thumb Distal",        assetName + "_LThumb3" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Proximal",     assetName + "_RThumb1" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Intermediate", assetName + "_RThumb2" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Distal",       assetName + "_RThumb3" );

                m_cachedMecanimBoneNameMap.Add( "Left Index Proximal",      assetName + "_LIndex1" );
                m_cachedMecanimBoneNameMap.Add( "Left Index Intermediate",  assetName + "_LIndex2" );
                m_cachedMecanimBoneNameMap.Add( "Left Index Distal",        assetName + "_LIndex3" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Proximal",     assetName + "_RIndex1" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Intermediate", assetName + "_RIndex2" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Distal",       assetName + "_RIndex3" );

                m_cachedMecanimBoneNameMap.Add( "Left Middle Proximal",      assetName + "_LMiddle1" );
                m_cachedMecanimBoneNameMap.Add( "Left Middle Intermediate",  assetName + "_LMiddle2" );
                m_cachedMecanimBoneNameMap.Add( "Left Middle Distal",        assetName + "_LMiddle3" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Proximal",     assetName + "_RMiddle1" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Intermediate", assetName + "_RMiddle2" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Distal",       assetName + "_RMiddle3" );

                m_cachedMecanimBoneNameMap.Add( "Left Ring Proximal",      assetName + "_LRing1" );
                m_cachedMecanimBoneNameMap.Add( "Left Ring Intermediate",  assetName + "_LRing2" );
                m_cachedMecanimBoneNameMap.Add( "Left Ring Distal",        assetName + "_LRing3" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Proximal",     assetName + "_RRing1" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Intermediate", assetName + "_RRing2" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Distal",       assetName + "_RRing3" );

                m_cachedMecanimBoneNameMap.Add( "Left Little Proximal",      assetName + "_LPinky1" );
                m_cachedMecanimBoneNameMap.Add( "Left Little Intermediate",  assetName + "_LPinky2" );
                m_cachedMecanimBoneNameMap.Add( "Left Little Distal",        assetName + "_LPinky3" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Proximal",     assetName + "_RPinky1" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Intermediate", assetName + "_RPinky2" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Distal",       assetName + "_RPinky3" );
                break;
            case OptitrackBoneNameConvention.FBX:
                m_cachedMecanimBoneNameMap.Add( "Hips",             assetName + "_Hips" );
                m_cachedMecanimBoneNameMap.Add( "Spine",            assetName + "_Spine" );
                m_cachedMecanimBoneNameMap.Add( "Chest",            assetName + "_Spine1" );
                m_cachedMecanimBoneNameMap.Add( "Neck",             assetName + "_Neck" );
                m_cachedMecanimBoneNameMap.Add( "Head",             assetName + "_Head" );

                m_cachedMecanimBoneNameMap.Add( "LeftShoulder",     assetName + "_LeftShoulder" );
                m_cachedMecanimBoneNameMap.Add( "LeftUpperArm",     assetName + "_LeftArm" );
                m_cachedMecanimBoneNameMap.Add( "LeftLowerArm",     assetName + "_LeftForeArm" );
                m_cachedMecanimBoneNameMap.Add( "LeftHand",         assetName + "_LeftHand" );

                m_cachedMecanimBoneNameMap.Add( "RightShoulder",    assetName + "_RightShoulder" );
                m_cachedMecanimBoneNameMap.Add( "RightUpperArm",    assetName + "_RightArm" );
                m_cachedMecanimBoneNameMap.Add( "RightLowerArm",    assetName + "_RightForeArm" );
                m_cachedMecanimBoneNameMap.Add( "RightHand",        assetName + "_RightHand" );

                m_cachedMecanimBoneNameMap.Add( "LeftUpperLeg",     assetName + "_LeftUpLeg" );
                m_cachedMecanimBoneNameMap.Add( "LeftLowerLeg",     assetName + "_LeftLeg" );
                m_cachedMecanimBoneNameMap.Add( "LeftFoot",         assetName + "_LeftFoot" );
                m_cachedMecanimBoneNameMap.Add( "LeftToeBase",      assetName + "_LeftToeBase" );

                m_cachedMecanimBoneNameMap.Add( "RightUpperLeg",    assetName + "_RightUpLeg" );
                m_cachedMecanimBoneNameMap.Add( "RightLowerLeg",    assetName + "_RightLeg" );
                m_cachedMecanimBoneNameMap.Add( "RightFoot",        assetName + "_RightFoot" );
                m_cachedMecanimBoneNameMap.Add( "RightToeBase",     assetName + "_RightToeBase" );


                m_cachedMecanimBoneNameMap.Add( "Left Thumb Proximal",      assetName + "_LeftHandThumb1" );
                m_cachedMecanimBoneNameMap.Add( "Left Thumb Intermediate",  assetName + "_LeftHandThumb2" );
                m_cachedMecanimBoneNameMap.Add( "Left Thumb Distal",        assetName + "_LeftHandThumb3" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Proximal",     assetName + "_RightHandThumb1" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Intermediate", assetName + "_RightHandThumb2" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Distal",       assetName + "_RightHandThumb3" );

                m_cachedMecanimBoneNameMap.Add( "Left Index Proximal",      assetName + "_LeftHandIndex1" );
                m_cachedMecanimBoneNameMap.Add( "Left Index Intermediate",  assetName + "_LeftHandIndex2" );
                m_cachedMecanimBoneNameMap.Add( "Left Index Distal",        assetName + "_LeftHandIndex3" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Proximal",     assetName + "_RightHandIndex1" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Intermediate", assetName + "_RightHandIndex2" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Distal",       assetName + "_RightHandIndex3" );

                m_cachedMecanimBoneNameMap.Add( "Left Middle Proximal",      assetName + "_LeftHandMiddle1" );
                m_cachedMecanimBoneNameMap.Add( "Left Middle Intermediate",  assetName + "_LeftHandMiddle2" );
                m_cachedMecanimBoneNameMap.Add( "Left Middle Distal",        assetName + "_LeftHandMiddle3" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Proximal",     assetName + "_RightHandMiddle1" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Intermediate", assetName + "_RightHandMiddle2" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Distal",       assetName + "_RightHandMiddle3" );

                m_cachedMecanimBoneNameMap.Add( "Left Ring Proximal",      assetName + "_LeftHandRing1" );
                m_cachedMecanimBoneNameMap.Add( "Left Ring Intermediate",  assetName + "_LeftHandRing2" );
                m_cachedMecanimBoneNameMap.Add( "Left Ring Distal",        assetName + "_LeftHandRing3" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Proximal",     assetName + "_RightHandRing1" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Intermediate", assetName + "_RightHandRing2" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Distal",       assetName + "_RightHandRing3" );

                m_cachedMecanimBoneNameMap.Add( "Left Little Proximal",      assetName + "_LeftHandPinky1" );
                m_cachedMecanimBoneNameMap.Add( "Left Little Intermediate",  assetName + "_LeftHandPinky2" );
                m_cachedMecanimBoneNameMap.Add( "Left Little Distal",        assetName + "_LeftHandPinky3" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Proximal",     assetName + "_RightHandPinky1" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Intermediate", assetName + "_RightHandPinky2" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Distal",       assetName + "_RightHandPinky3" );
                break;
            case OptitrackBoneNameConvention.BVH:
                m_cachedMecanimBoneNameMap.Add( "Hips",             assetName + "_Hips" );
                m_cachedMecanimBoneNameMap.Add( "Spine",            assetName + "_Chest" );
                m_cachedMecanimBoneNameMap.Add( "Chest",            assetName + "_Chest2" );
                m_cachedMecanimBoneNameMap.Add( "Neck",             assetName + "_Neck" );
                m_cachedMecanimBoneNameMap.Add( "Head",             assetName + "_Head" );

                m_cachedMecanimBoneNameMap.Add( "LeftShoulder",     assetName + "_LeftCollar" );
                m_cachedMecanimBoneNameMap.Add( "LeftUpperArm",     assetName + "_LeftShoulder" );
                m_cachedMecanimBoneNameMap.Add( "LeftLowerArm",     assetName + "_LeftElbow" );
                m_cachedMecanimBoneNameMap.Add( "LeftHand",         assetName + "_LeftWrist" );

                m_cachedMecanimBoneNameMap.Add( "RightShoulder",    assetName + "_RightCollar" );
                m_cachedMecanimBoneNameMap.Add( "RightUpperArm",    assetName + "_RightShoulder" );
                m_cachedMecanimBoneNameMap.Add( "RightLowerArm",    assetName + "_RightElbow" );
                m_cachedMecanimBoneNameMap.Add( "RightHand",        assetName + "_RightWrist" );

                m_cachedMecanimBoneNameMap.Add( "LeftUpperLeg",     assetName + "_LeftHip" );
                m_cachedMecanimBoneNameMap.Add( "LeftLowerLeg",     assetName + "_LeftKnee" );
                m_cachedMecanimBoneNameMap.Add( "LeftFoot",         assetName + "_LeftAnkle" );
                m_cachedMecanimBoneNameMap.Add( "LeftToeBase",      assetName + "_LeftToe" );

                m_cachedMecanimBoneNameMap.Add( "RightUpperLeg",    assetName + "_RightHip" );
                m_cachedMecanimBoneNameMap.Add( "RightLowerLeg",    assetName + "_RightKnee" );
                m_cachedMecanimBoneNameMap.Add( "RightFoot",        assetName + "_RightAnkle" );
                m_cachedMecanimBoneNameMap.Add( "RightToeBase",     assetName + "_RightToe" );


                m_cachedMecanimBoneNameMap.Add( "Left Thumb Proximal",      assetName + "_LeftFinger0" );
                m_cachedMecanimBoneNameMap.Add( "Left Thumb Intermediate",  assetName + "_LeftFinger01" );
                m_cachedMecanimBoneNameMap.Add( "Left Thumb Distal",        assetName + "_LeftFinger02" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Proximal",     assetName + "_RightFinger0" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Intermediate", assetName + "_RightFinger01" );
                m_cachedMecanimBoneNameMap.Add( "Right Thumb Distal",       assetName + "_RightFinger02" );

                m_cachedMecanimBoneNameMap.Add( "Left Index Proximal",      assetName + "_LeftFinger1" );
                m_cachedMecanimBoneNameMap.Add( "Left Index Intermediate",  assetName + "_LeftFinger11" );
                m_cachedMecanimBoneNameMap.Add( "Left Index Distal",        assetName + "_LeftFinger12" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Proximal",     assetName + "_RightFinger1" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Intermediate", assetName + "_RightFinger11" );
                m_cachedMecanimBoneNameMap.Add( "Right Index Distal",       assetName + "_RightFinger12" );

                m_cachedMecanimBoneNameMap.Add( "Left Middle Proximal",      assetName + "_LeftFinger2" );
                m_cachedMecanimBoneNameMap.Add( "Left Middle Intermediate",  assetName + "_LeftFinger21" );
                m_cachedMecanimBoneNameMap.Add( "Left Middle Distal",        assetName + "_LeftFinger22" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Proximal",     assetName + "_RightFinger2" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Intermediate", assetName + "_RightFinger21" );
                m_cachedMecanimBoneNameMap.Add( "Right Middle Distal",       assetName + "_RightFinger22" );

                m_cachedMecanimBoneNameMap.Add( "Left Ring Proximal",      assetName + "_LeftFinger3" );
                m_cachedMecanimBoneNameMap.Add( "Left Ring Intermediate",  assetName + "_LeftFinger31" );
                m_cachedMecanimBoneNameMap.Add( "Left Ring Distal",        assetName + "_LeftFinger32" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Proximal",     assetName + "_RightFinger3" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Intermediate", assetName + "_RightFinger31" );
                m_cachedMecanimBoneNameMap.Add( "Right Ring Distal",       assetName + "_RightFinger32" );

                m_cachedMecanimBoneNameMap.Add( "Left Little Proximal",      assetName + "_LeftFinger4" );
                m_cachedMecanimBoneNameMap.Add( "Left Little Intermediate",  assetName + "_LeftFinger41" );
                m_cachedMecanimBoneNameMap.Add( "Left Little Distal",        assetName + "_LeftFinger42" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Proximal",     assetName + "_RightFinger4" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Intermediate", assetName + "_RightFinger41" );
                m_cachedMecanimBoneNameMap.Add( "Right Little Distal",       assetName + "_RightFinger42" );
                break;
        }
    }
    #endregion Private methods
    
}