axmol/core/3d/MeshVertexIndexData.h

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

 https://axmol.dev/

 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 above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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#pragma once

#include <string>
#include <vector>

#include "3d/Bundle3DData.h"
#include "3d/AABB.h"
#include "3d/3DProgramInfo.h"

#include "base/Object.h"
#include "base/Vector.h"
#include "math/Math.h"
#include "renderer/MeshCommand.h"

namespace ax
{

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

class MeshVertexData;

/**
 * the MeshIndexData class.
 * @brief the MeshIndexData contain all of the indices data which mesh need.
 * @js NA
 * @lua NA
 */
class AX_DLL MeshIndexData : public Object
{
public:
    /** create  */
    static MeshIndexData* create(std::string_view id,
                                 MeshVertexData* vertexData,
                                 backend::Buffer* indexbuffer,
                                 const AABB& aabb);

    /**get index buffer*/
    backend::Buffer* getIndexBuffer() const { return _indexBuffer; }

    /**get vertex buffer*/
    backend::Buffer* getVertexBuffer() const;

    /**get vertex data*/
    const MeshVertexData* getMeshVertexData() const { return _vertexData; }

    /** aabb getter and setter */
    void setAABB(const AABB& aabb) { _aabb = aabb; }
    const AABB& getAABB() const { return _aabb; }

    /** id setter and getter */
    void setId(std::string_view id) { _id = id; }
    std::string_view getId() const { return _id; }

    /**primitive type setter & getter*/
    MeshCommand::PrimitiveType getPrimitiveType() const { return _primitiveType; }
    void setPrimitiveType(MeshCommand::PrimitiveType primitive) { _primitiveType = primitive; }

    void setIndexData(const MeshData::IndexArray& indexdata);

    MeshIndexData();
    virtual ~MeshIndexData();

protected:
    backend::Buffer* _indexBuffer = nullptr;  // index buffer
    MeshVertexData* _vertexData   = nullptr;  // vertex buffer, weak ref
    AABB _aabb;                               // original aabb of the submesh
    std::string _id;                          // id
    MeshCommand::PrimitiveType _primitiveType = MeshCommand::PrimitiveType::TRIANGLE;
    MeshData::IndexArray _indexData;

    friend class MeshVertexData;
    friend class MeshRenderer;
#if AX_ENABLE_CACHE_TEXTURE_DATA
    EventListenerCustom* _backToForegroundListener = nullptr;
#endif
};

/**
 * the MeshVertexData class.
 * @brief the MeshVertexData contain all of the vertices data which mesh need.
 */
class AX_DLL MeshVertexData : public Object
{
    friend class MeshRenderer;
    friend class Mesh;

public:
    /**create*/
    static MeshVertexData* create(const MeshData& meshdata, CustomCommand::IndexFormat format = CustomCommand::IndexFormat::U_SHORT);

    /** get vertexbuffer */
    backend::Buffer* getVertexBuffer() const { return _vertexBuffer; }

    /** get attributes count */
    ssize_t getMeshVertexAttribCount() const { return _attribs.size(); }

    /** get attribute by index */
    const MeshVertexAttrib& getMeshVertexAttrib(ssize_t index) const { return _attribs[index]; }

    /** get index data count */
    ssize_t getMeshIndexDataCount() const { return _indices.size(); }
    /** get index data by index */
    MeshIndexData* getMeshIndexDataByIndex(int index) const { return _indices.at(index); }
    /** get index data by id */
    MeshIndexData* getMeshIndexDataById(std::string_view id) const;

    ssize_t getSizePerVertex() const { return _sizePerVertex; }

    /**has vertex attribute?*/
    // TODO: will be removed!
    bool hasVertexAttrib(shaderinfos::VertexKey attrib) const;

    void setVertexData(const std::vector<float>& vertexData);

    MeshVertexData();
    virtual ~MeshVertexData();

protected:
    backend::Buffer* _vertexBuffer = nullptr;  // vertex buffer
    ssize_t _sizePerVertex         = -1;
    Vector<MeshIndexData*> _indices;           // index data
    std::vector<MeshVertexAttrib> _attribs;    // vertex attributes

    int _vertexCount = 0;  // vertex count
    std::vector<float> _vertexData;
#if AX_ENABLE_CACHE_TEXTURE_DATA
    EventListenerCustom* _backToForegroundListener = nullptr;
#endif
};

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

}