diff --git a/cg/half-edge.md b/cg/half-edge.md
index 4bc7cf1..b91536d 100644
--- a/cg/half-edge.md
+++ b/cg/half-edge.md
@@ -16,7 +16,7 @@ geometric interpretations，称为embeddings，与半边结构的关系是
 
 但也存在两个很重要的限制于关系的描述
 - no non-orientalbe sureface(Moebius strip)莫比乌斯带
-
+- no non-manifold surface非流形表面，如两个立方体共享一个顶点
 
 
 
diff --git a/dev-note/cmake.md b/dev-note/cmake.md
index 871031f..c30fd2b 100644
--- a/dev-note/cmake.md
+++ b/dev-note/cmake.md
@@ -1,5 +1,13 @@
 # CMake 
 
+## 详解
+
+### BUILD_INTERFACE
+In CMake, BUILD_INTERFACE is a generator expression that can be used with target_include_directories to specify include directories that should only be used when building the target itself, and not when building any other targets that may depend on it.
+
+### cmake_parse_arguments
+在[库glad](https://github.com/Dav1dde/glad)中使用了这个来解析glad_add_library函数
+
 ## cmd-tool
 
 cmake