diff --git a/src/main.rs b/src/main.rs
index 928f43c..f01b02e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -154,6 +154,6 @@ fn main() -> io::Result<()> {
 }
 
 fn edge_dist(a: Vec3, b: Vec3, base: Vec3, dir: Vec3) -> f32 {
-	Mat3 { c0: b - a, c1: base - a, c2: dir }.determinant()
+	// Note: given that the input is not arbitrary but comes from a cartesian product of certain (a, b) pairs and certain (base, dir) pairs, this can be optimized from Cnm to an+bm+cnm with c<C.
 	Mat3 { c0: b - a, c1: base - a, c2: -dir }.determinant()
 }