120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
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#pragma once
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#include <types/math/color.h>
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#include <types/math/rect.h>
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#include <types/math/vec2.h>
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#include <types/ptr/intrusive_ptr.h>
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#include <types/ptr/ref_counted.h>
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// 前向声明 OpenGL 类型
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typedef unsigned int GLuint;
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namespace extra2d {
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/**
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* @brief 顶点结构
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*/
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struct Vertex {
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Vec2 position; // 位置
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Vec2 texCoord; // 纹理坐标
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Color color; // 颜色
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Vertex() = default;
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Vertex(const Vec2 &pos, const Vec2 &uv, const Color &col)
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: position(pos), texCoord(uv), color(col) {}
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};
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/**
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* @brief 网格类
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*
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* 管理 OpenGL 顶点数组对象和缓冲区
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* 支持静态和动态顶点数据
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*/
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class Mesh : public RefCounted {
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public:
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/**
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* @brief 默认构造函数
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*/
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Mesh();
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/**
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* @brief 析构函数
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*/
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~Mesh() override;
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/**
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* @brief 设置顶点数据
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* @param vertices 顶点数组
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* @param count 顶点数量
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*/
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void setVertices(const Vertex *vertices, uint32_t count);
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/**
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* @brief 设置索引数据
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* @param indices 索引数组
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* @param count 索引数量
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*/
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void setIndices(const uint16_t *indices, uint32_t count);
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/**
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* @brief 更新部分顶点数据
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* @param vertices 顶点数据
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* @param count 顶点数量
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* @param offset 偏移量
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*/
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void updateVertices(const Vertex *vertices, uint32_t count, uint32_t offset);
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/**
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* @brief 绑定网格
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*/
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void bind() const;
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/**
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* @brief 解绑网格
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*/
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void unbind() const;
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/**
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* @brief 绘制网格
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*/
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void draw() const;
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/**
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* @brief 实例化绘制
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* @param instanceCount 实例数量
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*/
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void drawInstanced(uint32_t instanceCount) const;
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/**
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* @brief 获取顶点数量
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* @return 顶点数量
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*/
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uint32_t getVertexCount() const { return vertexCount_; }
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/**
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* @brief 获取索引数量
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* @return 索引数量
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*/
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uint32_t getIndexCount() const { return indexCount_; }
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/**
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* @brief 创建标准四边形
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* @param size 四边形大小
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* @param uv 纹理坐标范围
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* @return 网格对象
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*/
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static Ptr<Mesh> createQuad(const Vec2 &size,
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const Rect &uv = Rect(0, 0, 1, 1));
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private:
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GLuint vao_ = 0; // 顶点数组对象
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GLuint vbo_ = 0; // 顶点缓冲区
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GLuint ibo_ = 0; // 索引缓冲区
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uint32_t vertexCount_ = 0; // 顶点数量
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uint32_t indexCount_ = 0; // 索引数量
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uint32_t vertexCapacity_ = 0; // 顶点缓冲区容量
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uint32_t indexCapacity_ = 0; // 索引缓冲区容量
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};
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} // namespace extra2d
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