axmol/cocos/3d/CCSkeleton3D.h

/****************************************************************************
 Copyright (c) 2014 Chukong Technologies Inc.

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 ****************************************************************************/

#ifndef __CCSKELETON3D_H__
#define __CCSKELETON3D_H__

#include <unordered_map>

#include "3d/CCBundle3DData.h"

#include "base/ccMacros.h"
#include "base/CCRef.h"
#include "base/CCVector.h"
#include "base/ccTypes.h"
#include "math/CCMath.h"

NS_CC_BEGIN

/**
 * Defines a basic hierachial structure of transformation spaces.
 */
class CC_DLL Bone3D : public Ref
{
    friend class Skeleton3D;
    friend class MeshSkin;
public:
    
    /**
     * Returns the inverse bind pose matrix for this joint.
     *
     * @return Inverse bind pose matrix.
     */
    const Mat4& getInverseBindPose();
    
    /**update own world matrix and children's*/
    void updateWorldMat();
    
    /**get wrod matrix*/
    const Mat4& getWorldMat();
    
    /**get bone name*/
    const std::string& getName() const { return _name; }
    
    /**
     * set animation value
     * @param trans translate vec3
     * @param rot   rotation quaternion
     * @param scale scale vec3
     * @param tag, unique tag, only blend animation between different tags
     * @param weight, blend weight
     */
    void setAnimationValue(float* trans, float* rot, float* scale, void* tag = nullptr, float weight = 1.0f);
    
    /**clear bone blend states*/
    void clearBoneBlendState();
    /**
     * Creates C3DBone.
     */
    static Bone3D* create(const std::string& id);
    
    /**
     * Sets the inverse bind pose matrix.
     *
     * @param m Mat4 representing the inverse bind pose for this Bone.
     */
    void setInverseBindPose(const Mat4& m);
    
    /**
     * Sets the bone's original pose.
     *
     * @param m Mat4 representing the original pose for this Bone.
     */
    void setOriPose(const Mat4& m);
    
    /**
     * reset pose to origin
     */
    void resetPose();
    
    /**
     * Updates the joint matrix.
     *
     * @param matrixPalette The matrix palette to update.
     */
    void updateJointMatrix(Vec4* matrixPalette);
    
    /**bone tree, we do not inherit from Node, Node has too many properties that we do not need. A clean Node is needed.*/
    Bone3D* getParentBone();
    /**get child bone count*/
    ssize_t getChildBoneCount() const;
    /**get child bone by index*/
    Bone3D* getChildBoneByIndex(int index) const;
    /**add child bone*/
    void addChildBone(Bone3D* bone);
    /**remove child bone by index*/
    void removeChildBoneByIndex(int index);
    /**remove child bone*/
    void removeChildBone(Bone3D* bone);
    /**remove all child bone*/
    void removeAllChildBone();
    
    
    
protected:
    
    struct BoneBlendState
    {
        Vec3          localTranslate;
        Quaternion    localRot;
        Vec3          localScale;
        float         weight;
        void*         tag; //
        BoneBlendState()
        : localTranslate(Vec3::ZERO)
        , localRot(Quaternion::identity())
        , localScale(Vec3::ONE)
        , weight(1.f)
        , tag(nullptr)
        {
            
        }
    };
	/**
     * Constructor.
     */
    Bone3D(const std::string& id);
    
	/**
     * Destructor.
     */
    virtual ~Bone3D();
    
    /**
     * Update local matrix
     */
    void updateLocalMat();
    
    /**set world matrix dirty flag*/
    void setWorldMatDirty(bool dirty = true);
    
    std::string _name; // bone name
    /**
     * The Mat4 representation of the Joint's bind pose.
     */
    Mat4 _invBindPose;
    
    Mat4 _oriPose; //original bone pose
    
    Bone3D* _parent; //parent bone
    
    Vector<Bone3D*> _children;
    
    bool          _worldDirty;
    Mat4          _world;
    Mat4          _local;
    
    std::vector<BoneBlendState> _blendStates;
    
};

/**
 * Skeleton
 *
 */
class CC_DLL Skeleton3D: public Ref
{
public:
    
    /**create a new meshskin if do not want to share Skeleton3D*/
    static Skeleton3D* create(const std::string& filename, const std::string& name);
    
    static Skeleton3D* create(const std::vector<NodeData*>& skeletondata);
    
    /**get total bone count*/
    ssize_t getBoneCount() const;
    
    /**get bone*/
    Bone3D* getBoneByIndex(unsigned int index) const;
    Bone3D* getBoneByName(const std::string& id) const;
    
    /**get & set root bone*/
    Bone3D* getRootBone() const;
    void setRootBone(Bone3D* bone);
    ssize_t getRootCount() const;
    Bone3D* getRootBone(int index) const;
    
    /**get bone index*/
    int getBoneIndex(Bone3D* bone) const;
    
    /**refresh bone world matrix*/
    void updateBoneMatrix();
    
CC_CONSTRUCTOR_ACCESS:
    
    Skeleton3D();
    
    ~Skeleton3D();
    
    /**init from skeleton data*/
    bool initFromSkeletonData(const Skeleton3DData& skeletondata);
    
    /**remove all bones*/
    void removeAllBones();
    
    /**add bone*/
    void addBone(Bone3D* bone);
    
    /** create Bone3D from NodeData */
    static Bone3D* createBone3D(const NodeData& nodedata);
    
protected:
    
    Vector<Bone3D*> _bones; // bones

    Bone3D* _rootBone;
    Vector<Bone3D*> _rootBones;
};

/**
 * Skeleton3DData Cache
 */
class Skeleton3DDataCache
{
public:
    /**get & destroy*/
    static Skeleton3DDataCache* getInstance();
    static void destroyInstance();
    
    /**get mesh skin data from cache*/
    const Skeleton3DData* getSkeletonData(const std::string& key) const;
    
    /**add skeleton data to cache*/
    bool addSkeletonData(const std::string& key, const Skeleton3DData& skeletonData);
    
    /**remove all skeleton data*/
    void removeAllSkeletonData();
    
CC_CONSTRUCTOR_ACCESS:
    Skeleton3DDataCache();
    ~Skeleton3DDataCache();
    
    static Skeleton3DDataCache* _cacheInstance; // instance
    
    std::unordered_map<std::string, Skeleton3DData> _skeletonDatas; //cached skeleton datas
};

NS_CC_END

#endif // __CCSKELETON3D_H__