IAPDemo/Libraries/cocos2d/cocos/3d/CCMesh.h

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 Copyright (c) 2014-2017 Chukong Technologies Inc.

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#ifndef __CCMESH_H__
#define __CCMESH_H__

#include <string>
#include <map>

#include "3d/CCBundle3DData.h"
#include "3d/CCAABB.h"

#include "base/CCRef.h"
#include "math/CCMath.h"
#include "renderer/CCMeshCommand.h"

NS_CC_BEGIN

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

class Texture2D;
class MeshSkin;
class MeshIndexData;
class GLProgramState;
class GLProgram;
class Material;
class Renderer;
class Scene;
class Pass;

/** 
 * @brief Mesh: contains ref to index buffer, GLProgramState, texture, skin, blend function, aabb and so on
 */
class CC_DLL Mesh : public Ref
{
    friend class Sprite3D;
public:
    typedef std::vector<unsigned short> IndexArray;
    /**create mesh from positions, normals, and so on, single SubMesh*/
    static Mesh* create(const std::vector<float>& positions, const std::vector<float>& normals, const std::vector<float>& texs, const IndexArray& indices);
    
    //高频操作时的创建方式，解决内存分配导致的卡顿问题
    static Mesh* create(std::vector<float>* outputVertices,const std::vector<float>& positions, const std::vector<float>& normals, const std::vector<float>& tangent, const std::vector<float>& texs, const IndexArray& indices,MeshData* reusedData);
    
    /**create mesh with vertex attributes*/
    CC_DEPRECATED_ATTRIBUTE static Mesh* create(const std::vector<float>& vertices, int perVertexSizeInFloat, const IndexArray& indices, int /*numIndex*/, const std::vector<MeshVertexAttrib>& attribs, int /*attribCount*/){ return create(vertices, perVertexSizeInFloat, indices, attribs); }
    
    /**
     * @lua NA
     */
    static Mesh* create(const std::vector<float>& vertices, int perVertexSizeInFloat, const IndexArray& indices, const std::vector<MeshVertexAttrib>& attribs);
    
    /**
     * @lua 缓存meshdata，解决高频操作时内存导致的卡顿问题
     */
    static Mesh* create(const std::vector<float>& vertices, int perVertexSizeInFloat, const IndexArray& indices, const std::vector<MeshVertexAttrib>& attribs,MeshData* reusedData);
    
    /** 
     * create mesh
     * @lua NA
     */
    static Mesh* create(const std::string& name, MeshIndexData* indexData, MeshSkin* skin = nullptr);
    
    
    void updateMesh(std::vector<float>* outputVertices,const std::vector<float>& positions, const std::vector<float>& normals, const std::vector<float>& tangent, const std::vector<float>& texs, const IndexArray& indices);
    /**
     * get vertex buffer
     * 
     * @lua NA
     */
    GLuint getVertexBuffer() const;
    /**
     * has vertex attribute?
     *
     * @lua NA
     */
    bool hasVertexAttrib(int attrib) const;
    /**get mesh vertex attribute count*/
    ssize_t getMeshVertexAttribCount() const;
    /**get MeshVertexAttribute by index*/
    const MeshVertexAttrib& getMeshVertexAttribute(int idx);
    /**get per vertex size in bytes*/
    int getVertexSizeInBytes() const;

    /**
     * set texture (diffuse), which is responsible for the main appearance. It is also means main texture, you can also call setTexture(texPath, NTextureData::Usage::Diffuse)
     * @param texPath texture path
     */
    void setTexture(const std::string& texPath);
    /**
     * set texture (diffuse), which is responsible for the main appearance. It is also means main texture, you can also call setTexture(texPath, NTextureData::Usage::Diffuse)
     * @param tex texture to be set
     */
    void setTexture(Texture2D* tex);
    /**
     * set texture
     * @param tex texture to be set
     * @param usage Usage of this texture
     * @param whether refresh the cache file name
     */
    void setTexture(Texture2D* tex, NTextureData::Usage usage,bool cacheFileName = true);
    /**
     * set texture
     * @param texPath texture path
     * @param usage Usage of this texture
     */
    void setTexture(const std::string& texPath, NTextureData::Usage usage);
    /**
     * Get texture (diffuse), which is responsible for the main appearance. It is also means main texture, you can also call getTexture(NTextureData::Usage::Diffuse)
     * @return Texture used, return the texture of first mesh if multiple meshes exist
     */
    Texture2D* getTexture() const;
    /**
     * Get texture
     * @param usage Usage of returned texture
     * @return The texture of this usage, return the texture of first mesh if multiple meshes exist
     */
    Texture2D* getTexture(NTextureData::Usage usage);
    
    /**visible getter and setter*/
    void setVisible(bool visible);
    bool isVisible() const;
    
    /**
     * skin getter
     *
     * @lua NA
     */
    MeshSkin* getSkin() const { return _skin; }
    
    /**
     * mesh index data getter
     *
     * @lua NA
     */
    MeshIndexData* getMeshIndexData() const { return _meshIndexData; }
    
    /**
     * get GLProgramState
     * 
     * @lua NA
     */
    GLProgramState* getGLProgramState() const;
    
    /**name getter */
    const std::string& getName() const { return _name; }
    
    void setBlendFunc(const BlendFunc &blendFunc);
    const BlendFunc &getBlendFunc() const;
    
    /** 
     * get primitive type
     *
     * @lua NA
     */
    GLenum getPrimitiveType() const;
    /**
     * get index count
     *
     * @lua NA
     */
    ssize_t getIndexCount() const;
    /**
     * get index format
     *
     * @lua NA
     */
    GLenum getIndexFormat() const;
    /**
     * get index buffer
     *
     * @lua NA
     */
    GLuint getIndexBuffer() const;
    
    /**get AABB*/
    const AABB& getAABB() const { return _aabb; }

    /**  Sets a new GLProgramState for the Mesh
     * A new Material will be created for it
     */
    void setGLProgramState(GLProgramState* glProgramState);

    /** Sets a new Material to the Mesh */
    void setMaterial(Material* material);

    /** Returns the Material being used by the Mesh */
    Material* getMaterial() const;

    void draw(Renderer* renderer, float globalZ, const Mat4& transform, uint32_t flags, unsigned int lightMask, const Vec4& color, bool forceDepthWrite);

    /** 
     * Get the MeshCommand.
     */
    MeshCommand& getMeshCommand() { return _meshCommand; }

    /**skin setter*/
    void setSkin(MeshSkin* skin);
    /**Mesh index data setter*/
    void setMeshIndexData(MeshIndexData* indexdata);
    /**name setter*/
    void setName(const std::string& name) { _name = name; }
 
    /** 
     * calculate the AABB of the mesh
     * @note the AABB is in the local space, not the world space
     */
    void calculateAABB();
    
    /**
     * force set this Sprite3D to 2D render queue
     */
    void setForce2DQueue(bool force2D) { _force2DQueue = force2D; }

    std::string getTextureFileName(){ return _texFile; }

CC_CONSTRUCTOR_ACCESS:

    Mesh();
    virtual ~Mesh();

protected:
    void resetLightUniformValues();
    void setLightUniforms(Pass* pass, Scene* scene, const Vec4& color, unsigned int lightmask);
    void bindMeshCommand();

    std::map<NTextureData::Usage, Texture2D*> _textures; //textures that submesh is using
    MeshSkin*           _skin;     //skin
    bool                _visible; // is the submesh visible
    bool                _isTransparent; // is this mesh transparent, it is a property of material in fact
    bool                _force2DQueue; // add this mesh to 2D render queue
    
    std::string         _name;
    MeshCommand         _meshCommand;
    MeshIndexData*      _meshIndexData;
    GLProgramState*     _glProgramState;
    BlendFunc           _blend;
    bool                _blendDirty;
    Material*           _material;
    AABB                _aabb;
    std::function<void()> _visibleChanged;
    
    ///light parameters
    std::vector<Vec3> _dirLightUniformColorValues;
    std::vector<Vec3> _dirLightUniformDirValues;
    
    std::vector<Vec3> _pointLightUniformColorValues;
    std::vector<Vec3> _pointLightUniformPositionValues;
    std::vector<float> _pointLightUniformRangeInverseValues;
    
    std::vector<Vec3> _spotLightUniformColorValues;
    std::vector<Vec3> _spotLightUniformPositionValues;
    std::vector<Vec3> _spotLightUniformDirValues;
    std::vector<float> _spotLightUniformInnerAngleCosValues;
    std::vector<float> _spotLightUniformOuterAngleCosValues;
    std::vector<float> _spotLightUniformRangeInverseValues;

    std::string _texFile;
};

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

/// @cond
extern std::string CC_DLL s_uniformSamplerName[];//uniform sampler names array
/// @endcond

NS_CC_END

#endif // __CCMESH_H__