diff --git a/glm/helper.go b/glm/helper.go
new file mode 100644
index 0000000..918bba1
--- /dev/null
+++ b/glm/helper.go
@@ -0,0 +1,7 @@
+package glm
+
+import "cmp"
+
+func Clamp[T cmp.Ordered] (low, high, val T) T {
+	return min(high, max(low, val))
+}