Update file .clang-format
diff --git a/.clang-format b/.clang-format
index b293c3e..b48874e 100644
--- a/.clang-format
+++ b/.clang-format
@@ -3,6 +3,8 @@
 ColumnLimit:  120
 ---
 Language:     Cpp
+BasedOnStyle: Google
+ColumnLimit:  120
 StatementMacros:
   - EIGEN_STATIC_ASSERT
 SortIncludes: false