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docs/api/resources/mesh/addsection.md

@@ -0,0 +1,30 @@
+# Mesh::AddSection
+
+```cpp
+void AddSection(const MeshSection& section)
+```
+
+添加网格分段（Submesh）。一个 Mesh 可以包含多个分段，每个分段对应一组索引和不同的材质。
+
+**参数：**
+- `section` - 网格分段描述结构体
+
+**返回：** 无
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+MeshSection section;
+section.baseVertex = 0;
+section.vertexCount = 1000;
+section.startIndex = 0;
+section.indexCount = 3000;
+section.materialID = 0;
+mesh->AddSection(section);
+```
+
+## 相关文档
+
+- [Mesh 总览](mesh.md) - 返回类总览