axmol/core/3d/CCSprite3D.h

/****************************************************************************
 Copyright (c) 2014-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#ifndef __CCSPRITE3D_H__
#define __CCSPRITE3D_H__

#include <unordered_map>

#include "base/CCVector.h"
#include "base/ccTypes.h"
#include "base/CCProtocols.h"
#include "2d/CCNode.h"
#include "renderer/CCMeshCommand.h"
#include "3d/CCSkeleton3D.h"  // need to include for lua-binding
#include "3d/CCAABB.h"
#include "3d/CCBundle3DData.h"
#include "3d/CCMeshVertexIndexData.h"

NS_CC_BEGIN

/**
 * @addtogroup _3d
 * @{
 */

class Mesh;
class Texture2D;
class MeshSkin;
class AttachNode;
struct NodeData;
/** @brief Sprite3D: A sprite can be loaded from 3D model files, .obj, .c3t, .c3b, then can be drawn as sprite */
class CC_DLL Sprite3D : public Node, public BlendProtocol
{
public:
    /**
     * Creates an empty sprite3D without 3D model and texture.
     *
     * @return An autoreleased sprite3D object.
     */
    static Sprite3D* create();

    /** creates a Sprite3D*/
    static Sprite3D* create(std::string_view modelPath);

    // creates a Sprite3D. It only supports one texture, and overrides the internal texture with 'texturePath'
    static Sprite3D* create(std::string_view modelPath, std::string_view texturePath);

    /** create 3d sprite asynchronously
     * If the 3d model was previously loaded, it will create a new 3d sprite and the callback will be called at once.
     * Otherwise it will load the model file in a new thread, and when the 3d sprite is loaded, the callback will be
     * called with the created Sprite3D and a user-defined parameter. The callback will be called from the main thread,
     * so it is safe to create any cocos2d object from the callback.
     * @param modelPath model to be loaded
     * @param callback callback after loading
     * @param callbackparam user defined parameter for the callback
     */
    static void createAsync(std::string_view modelPath,
                            const std::function<void(Sprite3D*, void*)>& callback,
                            void* callbackparam);

    static void createAsync(std::string_view modelPath,
                            std::string_view texturePath,
                            const std::function<void(Sprite3D*, void*)>& callback,
                            void* callbackparam);

    /**set diffuse texture, set the first if multiple textures exist*/
    void setTexture(std::string_view texFile);
    void setTexture(Texture2D* texture);

    /**get Mesh by index*/
    Mesh* getMeshByIndex(int index) const;

    /**get Mesh by Name, it returns the first one if there are more than one mesh with the same name */
    Mesh* getMeshByName(std::string_view name) const;

    /**
     * get mesh array by name, returns all meshes with the given name
     *
     * @lua NA
     */
    std::vector<Mesh*> getMeshArrayByName(std::string_view name) const;

    /**get mesh*/
    Mesh* getMesh() const;

    /** get mesh count */
    ssize_t getMeshCount() const { return _meshes.size(); }

    Skeleton3D* getSkeleton() const { return _skeleton; }

    /**get AttachNode by bone name, return nullptr if not exist*/
    AttachNode* getAttachNode(std::string_view boneName);

    /**remove attach node*/
    void removeAttachNode(std::string_view boneName);

    /**remove all attach nodes*/
    void removeAllAttachNode();

    // overrides
    virtual void setBlendFunc(const BlendFunc& blendFunc) override;
    virtual const BlendFunc& getBlendFunc() const override;

    // overrides
    /** Sets ProgramState, you should bind attributes by yourself */
    bool setProgramState(backend::ProgramState* programState, bool needsRetain = true) override;

    /*
     * Get AABB
     * If the sprite has animation, it can't be calculated accurately,
     * because bone can drive the vertices, we just use the origin vertices
     * to calculate the AABB.
     */
    const AABB& getAABB() const;

    /*
     * Get AABB Recursively
     * Because some times we may have an empty Sprite3D Node as parent, but
     * the Sprite3D don't contain any meshes, so getAABB()
     * will return a wrong value at that time.
     */
    AABB getAABBRecursively();

    /**
     * Executes an action, and returns the action that is executed. For Sprite3D special logic are needed to take care
     * of Fading.
     *
     * This node becomes the action's target. Refer to Action::getTarget()
     * @warning Actions don't retain their target.
     *
     * @return An Action pointer
     */
    virtual Action* runAction(Action* action) override;

    /**
     * Force to write to depth buffer, this is useful if you want to achieve effects like fading.
     */
    void setForceDepthWrite(bool value) { _forceDepthWrite = value; }
    bool isForceDepthWrite() const { return _forceDepthWrite; };

    /**
     * Returns 2d bounding-box
     * Note: the bounding-box is just get from the AABB which as Z=0, so that is not very accurate.
     */
    virtual Rect getBoundingBox() const override;

    // set which face is going to cull, CullFaceSide::BACK, CullFaceSide::FRONT and CullFaceSide::NONE.
    virtual void setCullFace(CullFaceSide side);
    // set cull face enable or not
    void setCullFaceEnabled(bool enable);

    /** light mask getter & setter, light works only when _lightmask & light's flag is true, default value of _lightmask
     * is 0xffff */
    void setLightMask(unsigned int mask) { _lightMask = mask; }
    unsigned int getLightMask() const { return _lightMask; }

    /**draw*/
    virtual void draw(Renderer* renderer, const Mat4& transform, uint32_t flags) override;

    /** Adds a new material to the sprite.
     The Material will be applied to all the meshes that belong to the sprite.
     Internally it will call `setMaterial(material,-1)`
     */
    void setMaterial(Material* material);

    /** Adds a new material to a particular mesh of the sprite.
     meshIndex is the mesh that will be applied to.
     if meshIndex == -1, then it will be applied to all the meshes that belong to the sprite.
     */
    void setMaterial(Material* material, int meshIndex);

    /** Adds a new material to a particular mesh of the sprite.
     meshIndex is the mesh that will be applied to.
     if meshIndex == -1, then it will be applied to all the meshes that belong to the sprite.
     */
    Material* getMaterial(int meshIndex) const;

    /**
     * force set this Sprite3D to 2D render queue
     */
    void setForce2DQueue(bool force2D);

    /**
     * Get meshes used in sprite 3d
     */
    const Vector<Mesh*>& getMeshes() const { return _meshes; }

    CC_CONSTRUCTOR_ACCESS :

        Sprite3D();
    virtual ~Sprite3D();

    virtual bool init() override;

    bool initWithFile(std::string_view path);

    bool initFrom(const NodeDatas& nodedatas, const MeshDatas& meshdatas, const MaterialDatas& materialdatas);

    /**load sprite3d from cache, return true if succeed, false otherwise*/
    bool loadFromCache(std::string_view path);

    /** load file and set it to meshedatas, nodedatas and materialdatas, obj file .mtl file should be at the same
     * directory if exist */
    bool loadFromFile(std::string_view path, NodeDatas* nodedatas, MeshDatas* meshdatas, MaterialDatas* materialdatas);

    /**
     * Visits this Sprite3D's children and draw them recursively.
     * Note: all its children will rendered as 3D objects
     */
    virtual void visit(Renderer* renderer, const Mat4& parentTransform, uint32_t parentFlags) override;

    /**generate default material*/
    void genMaterial(bool useLight = false);

    void createNode(NodeData* nodedata, Node* root, const MaterialDatas& materialdatas, bool singleSprite);
    void createAttachSprite3DNode(NodeData* nodedata, const MaterialDatas& materialdatas);
    Sprite3D* createSprite3DNode(NodeData* nodedata, ModelData* modeldata, const MaterialDatas& materialdatas);

    /**get MeshIndexData by Id*/
    MeshIndexData* getMeshIndexData(std::string_view indexId) const;

    void addMesh(Mesh* mesh);

    void onAABBDirty() { _aabbDirty = true; }

    void afterAsyncLoad(void* param);

    static AABB getAABBRecursivelyImp(Node* node);

protected:
    Skeleton3D* _skeleton;  // skeleton

    Vector<MeshVertexData*> _meshVertexDatas;

    hlookup::string_map<AttachNode*> _attachments;

    BlendFunc _blend;

    Vector<Mesh*> _meshes;

    mutable AABB _aabb;                  // cache current aabb
    mutable Mat4 _nodeToWorldTransform;  // cache the matrix
    mutable bool _aabbDirty;
    unsigned int _lightMask;
    bool _shaderUsingLight;  // is current shader using light ?
    bool _forceDepthWrite;   // Always write to depth buffer
    bool _usingAutogeneratedGLProgram;

    struct AsyncLoadParam
    {
        std::function<void(Sprite3D*, void*)> afterLoadCallback;  // callback after load
        void* callbackParam;
        bool result;  // sprite load result
        std::string modelPath;
        std::string texPath;  //
        MeshDatas* meshdatas;
        MaterialDatas* materialdatas;
        NodeDatas* nodeDatas;
    };
    AsyncLoadParam _asyncLoadParam;
};

///////////////////////////////////////////////////////
/**
 * Sprite3DCache
 * @brief the cache data of Sprite3D, use to speed up Sprite3D::create
 */
class CC_DLL Sprite3DCache
{
public:
    struct Sprite3DData
    {
        Vector<MeshVertexData*> meshVertexDatas;
        Vector<backend::ProgramState*> programStates;
        NodeDatas* nodedatas;
        MaterialDatas* materialdatas;
        ~Sprite3DData()
        {
            if (nodedatas)
                delete nodedatas;
            if (materialdatas)
                delete materialdatas;
            meshVertexDatas.clear();
            programStates.clear();
        }
    };

    /**get & destroy*/
    static Sprite3DCache* getInstance();
    static void destroyInstance();

    /**
     * get the SpriteData struct
     *
     * @lua NA
     */
    Sprite3DData* getSpriteData(std::string_view key) const;

    /**
     * add the SpriteData into Sprite3D by given the specified key
     *
     * @lua NA
     */
    bool addSprite3DData(std::string_view key, Sprite3DData* spritedata);

    /**remove the SpriteData from Sprite3D by given the specified key*/
    void removeSprite3DData(std::string_view key);

    /**remove all the SpriteData from Sprite3D*/
    void removeAllSprite3DData();

    CC_CONSTRUCTOR_ACCESS : Sprite3DCache();
    ~Sprite3DCache();

protected:
    static Sprite3DCache* _cacheInstance;
    hlookup::string_map<Sprite3DData*> _spriteDatas;  // cached sprite data
};

// end of 3d group
/// @}

NS_CC_END
#endif  // __SPRITE3D_H_