axmol/cocos/3d/CCMeshSkin.h

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

 http://www.cocos2d-x.org

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 of this software and associated documentation files (the "Software"), to deal
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 The above copyright notice and this permission notice shall be included in
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 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 THE SOFTWARE.
 ****************************************************************************/

#ifndef __CCMESHSKIN_H__
#define __CCMESHSKIN_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 Bone : public Ref
{
    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*/
    void setAnimationValue(float* trans, float* rot, float* scale, float weight = 1.0f);
    
    /**clear bone blend states*/
    void clearBoneBlendState();
    /**
     * Creates C3DBone.
     */
    static Bone* 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.*/
    Bone* getParentBone();
    /**get child bone count*/
    int getChildBoneCount() const;
    /**get child bone by index*/
    Bone* getChildBoneByIndex(int index);
    /**add child bone*/
    void addChildBone(Bone* bone);
    /**remove child bone by index*/
    void removeChildBoneByIndex(int index);
    /**remove child bone*/
    void removeChildBone(Bone* bone);
    /**remove all child bone*/
    void removeAllChildBone();
    
    
    
protected:
    
    struct BoneBlendState
    {
        Vec3          localTranslate;
        Quaternion    localRot;
        Vec3          localScale;
        float         weight;
        BoneBlendState()
        : localTranslate(Vec3::ZERO)
        , localRot(Quaternion::identity())
        , localScale(Vec3::ONE)
        , weight(1.f)
        {
            
        }
    };
	/**
     * Constructor.
     */
    Bone(const std::string& id);
    
	/**
     * Destructor.
     */
    virtual ~Bone();
    
    /**
     * 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
    
    Bone* _parent; //parent bone
    
    Vector<Bone*> _children;
    
    bool          _worldDirty;
    Mat4          _world;
    Mat4          _local;
    
    std::vector<BoneBlendState> _blendStates;
    
};

/**
 * MeshSkin, A class maintain a collection of bones that affect Mesh vertex.
 * And it is responsible for computing matrix palletes that used by skin mesh rendering.
 */
class MeshSkin: public Ref
{
public:
    
    /**create a new meshskin if do not want to share meshskin*/
    static MeshSkin* create(const std::string& filename, const std::string& name);
    
    /**get skin bone count*/
    ssize_t getSkinBoneCount() const;
    
    /**get bone*/
    Bone* getBoneByIndex(unsigned int index) const;
    Bone* getBoneByName(const std::string& id) const;
    
    /**get & set root bone*/
    Bone* getRootBone() const;
    void setRootBone(Bone* bone);
    
    /**get bone index*/
    int getBoneIndex(Bone* bone) const;
    
    /**compute matrix palette used by gpu skin*/
    Vec4* getMatrixPalette();
    
    /**getSkinBoneCount() * 3*/
    ssize_t getMatrixPaletteSize() const;
    
    /**refresh bone world matrix*/
    void updateBoneMatrix();
    
CC_CONSTRUCTOR_ACCESS:
    
    MeshSkin();
    
    ~MeshSkin();
    
    /**init from skin data*/
    bool initFromSkinData(const SkinData& skindata);
    
    /**remove all bones*/
    void removeAllBones();
    
    /**add skin bone*/
    void addSkinBone(Bone* bone);
    
    /**add Node bone*/
    void addNodeBone(Bone* bone);
    
protected:
    
    Vector<Bone*> _skinBones; // bones with skin
    Vector<Bone*> _nodeBones; //bones without skin, only used to compute transform of children

    Bone* _rootBone;
    
    // Pointer to the array of palette matrices.
    // This array is passed to the vertex shader as a uniform.
    // Each 4x3 row-wise matrix is represented as 3 Vec4's.
    // The number of Vec4's is (_skinBones.size() * 3).
    Vec4* _matrixPalette;
};

/**
 * MeshSkinData Cache
 */
class MeshSkinDataCache
{
public:
    /**get & destroy*/
    static MeshSkinDataCache* getInstance();
    static void destroyInstance();
    
    /**get mesh skin data from cache*/
    const SkinData* getMeshSkinData(const std::string& key) const;
    
    /**add mesh skin data to cache*/
    bool addMeshSkinData(const std::string& key, const SkinData& skinData);
    
    /**remove all mesh skin data*/
    void removeAllMeshSkinData();
    
protected:
    MeshSkinDataCache();
    ~MeshSkinDataCache();
    
    static MeshSkinDataCache* _cacheInstance; // instance
    
    std::unordered_map<std::string, SkinData> _skinDatas; //cached skindatas
};

NS_CC_END

#endif // __CCSKIN_H__