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docs/api/resources/material/updateconstantbuffer.md

@@ -0,0 +1,26 @@
+# Material::UpdateConstantBuffer
+
+```cpp
+void UpdateConstantBuffer()
+```
+
+更新材质常量缓冲区。将所有属性值打包到常量缓冲区的二进制数据中，供 GPU 着色器使用。
+
+**参数：** 无
+
+**返回：** 无
+
+**复杂度：** O(n)，n 为属性数量
+
+**示例：**
+
+```cpp
+mat->SetFloat("roughness", 0.5f);
+mat->SetFloat3("albedo", Math::Vector3(1.0f, 0.8f, 0.6f));
+mat->UpdateConstantBuffer();
+auto cbData = mat->GetConstantBufferData();
+```
+
+## 相关文档
+
+- [Material 总览](material.md) - 返回类总览