diff --git a/.gitignore b/.gitignore
index f25aa85..94e8588 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,8 +8,9 @@ dummy-file
 toto
 
 tools/*.obj
+! tools/minimal.obj
 tools/read_obj
 tools/*.xyz
 tools/*.asc
 tools/toto
-
+tools/core
diff --git a/tools/.gitignore b/tools/.gitignore
new file mode 100644
index 0000000..a86509e
--- /dev/null
+++ b/tools/.gitignore
@@ -0,0 +1,4 @@
+
+*.vertices
+*.edges
+