axmol/cocos/3d/CCMesh.h

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

 http://www.cocos2d-x.org

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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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
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 THE SOFTWARE.
 ****************************************************************************/

#ifndef __CCMESH_H__
#define __CCMESH_H__

#include <string>
#include <vector>

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

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

#include "CCAABB.h"


NS_CC_BEGIN

class EventListenerCustom;
class EventCustom;

class CC_DLL RenderMeshData
{
    typedef std::vector<unsigned short> IndexArray;
    friend class Mesh;
public:
    RenderMeshData(): _vertexsizeBytes(0)
    {
    }
    bool hasVertexAttrib(int attrib);
    bool init(const std::vector<float>& positions, const std::vector<float>& normals, const std::vector<float>& texs, const std::vector<IndexArray>& subMeshIndices);
    bool init(const std::vector<float>& vertices, int vertexSizeInFloat, const std::vector<IndexArray>& subMeshIndices, const std::vector<MeshVertexAttrib>& attribs);
    
protected:
    
    int calVertexSizeBytes();
    
    int _vertexsizeBytes;
    ssize_t _vertexNum;
    std::vector<float> _vertexs;
    std::vector<IndexArray> _subMeshIndices;
    std::vector<MeshVertexAttrib> _vertexAttribs;
};

/** 
 * Mesh: Geometry with a collection of vertex. 
 * Supporting various vertex formats.
 */
class CC_DLL Mesh : public Ref
{
    typedef std::vector<unsigned short> IndexArray;
public:
    /**create mesh from positions, normals, and so on, sigle SubMesh*/
    static Mesh* create(const std::vector<float>& positions, const std::vector<float>& normals, const std::vector<float>& texs, const IndexArray& indices);
    
    /**create mesh from positions, normals, and so on, multi-SubMesh*/
    static Mesh* create(const std::vector<float>& positions, const std::vector<float>& normals, const std::vector<float>& texs, const std::vector<IndexArray>& subMeshIndices);
    
    /**create mesh with vertex attributes*/
    CC_DEPRECATED_ATTRIBUTE static Mesh* create(const std::vector<float>& vertices, int vertexSizeInFloat, const IndexArray& indices, int numIndex, const std::vector<MeshVertexAttrib>& attribs, int attribCount) { return create(vertices, vertexSizeInFloat, indices, attribs); }
    
    /**
     * create Mesh
     * @param vertices vertices buffer data
     * @param vertexSizeInFloat size of each vertex
     * @param indices index buffer data that denotes how to connect the vertex, sigle SubMesh
     * @param attribs vertex attributes
     */
    static Mesh* create(const std::vector<float>& vertices, int vertexSizeInFloat, const IndexArray& indices, const std::vector<MeshVertexAttrib>& attribs);
    
    /**
     * create Mesh
     * @param vertices vertices buffer data
     * @param vertexSizeInFloat size of each vertex
     * @param subMeshIndices index buffer data that denotes how to connect the vertex, multi-SubMesh
     * @param attribs vertex attributes
     */
    static Mesh* create(const std::vector<float>& vertices, int vertexSizeInFloat, const std::vector<IndexArray>& subMeshIndices, const std::vector<MeshVertexAttrib>& attribs);

    /**get vertex buffer*/
    inline GLuint getVertexBuffer() const { return _vertexBuffer; }
    
    /**get mesh vertex attribute count*/
    ssize_t getMeshVertexAttribCount() const { return _renderdata._vertexAttribs.size(); }
    /**get MeshVertexAttribute by index*/
    const MeshVertexAttrib& getMeshVertexAttribute(int idx) const { return _renderdata._vertexAttribs[idx]; }
    /**has vertex attribute?*/
    bool hasVertexAttrib(int attrib) { return _renderdata.hasVertexAttrib(attrib); }
    /**get per vertex size in bytes*/
    int getVertexSizeInBytes() const { return _renderdata._vertexsizeBytes; }
    
    /**get sub mesh count*/
    ssize_t getSubMeshCount() const { return _subMeshes.size(); }
    
    /**get sub mesh by index*/
    SubMesh* getSubMesh(int index) const { return _subMeshes.at(index); }
    
    /**build vertex buffer from renderdata*/
    void restore();
    
    /** get origin aabb that calculate from vertices*/
    const AABB& getOriginAABB() const;
    
    /**to be deprecated, those functions have been moved to SubMesh*/
    /** get primitive type*/
    CC_DEPRECATED_ATTRIBUTE PrimitiveType getPrimitiveType() const { return _subMeshes.at(0)->getPrimitiveType(); }
    /**get index count*/
    CC_DEPRECATED_ATTRIBUTE ssize_t getIndexCount() const { return _subMeshes.at(0)->getIndexCount(); }
    /**get index format*/
    CC_DEPRECATED_ATTRIBUTE IndexFormat getIndexFormat() const { return _subMeshes.at(0)->getIndexFormat(); }
    /**get index buffer*/
    CC_DEPRECATED_ATTRIBUTE GLuint getIndexBuffer() const {return _subMeshes.at(0)->getIndexBuffer(); }

CC_CONSTRUCTOR_ACCESS:
    
    Mesh();
    virtual ~Mesh();
    /**init mesh*/
    bool init(const std::vector<float>& positions, const std::vector<float>& normals, const std::vector<float>& texs, const std::vector<IndexArray>& indices);
    
    /**init mesh*/
    bool init(const std::vector<float>& vertices, int vertexSizeInFloat, const std::vector<IndexArray>& indices, const std::vector<MeshVertexAttrib>& attribs);

    /**build sub meshes*/
    void buildSubMeshes();
    /**build buffer*/
    void buildBuffer();
    /**free buffer*/
    void cleanAndFreeBuffers();
    
    /*
     * calculate AABB by origin vertices
     * @param the vertices list
     * @param stride the stride between two vertex's position data.
     */
    void calOriginAABB(const std::vector<float>& vertices, unsigned int stride);

protected:
    GLuint _vertexBuffer;
    Vector<SubMesh*> _subMeshes;

    RenderMeshData _renderdata;
    
    AABB _originAABB;
};

/**
 * Mesh Cache
 */
class MeshCache
{
public:
    /**get & destroy*/
    static MeshCache* getInstance();
    static void destroyInstance();
    
    /**get mesh from cache*/
    Mesh* getMesh(const std::string& key) const;
    
    /**add mesh to cache*/
    bool addMesh(const std::string& key, Mesh* mesh);
    
    /**remove all meshes*/
    void removeAllMeshes();

    /**remove unused meshes*/
    void removeUnusedMesh();
    
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_WP8)
    void listenRendererRecreated(EventCustom* event);
#endif
    
CC_CONSTRUCTOR_ACCESS:
    
    MeshCache();
    ~MeshCache();
    
protected:
    
    static MeshCache* _cacheInstance;//instance
    
    std::unordered_map<std::string, Mesh*> _meshes; //cached meshes
    
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_WP8)
    EventListenerCustom* _rendererRecreatedListener;
#endif
};

NS_CC_END

#endif // __CCMESH_H_