From 33816fab944015fdff14e7d6e1a8f17affee35db Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 7 Nov 2024 12:31:02 +1000
Subject: [PATCH] vector: use xy members instead of 01 indices for cross

It's functionally identically, but is easier to read when comparing with
maths documents.
---
 cruft/util/vector.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cruft/util/vector.hpp b/cruft/util/vector.hpp
index 05181fc3..4457f11b 100644
--- a/cruft/util/vector.hpp
+++ b/cruft/util/vector.hpp
@@ -66,7 +66,7 @@ namespace cruft {
     T
     cross (vector<2,T> a, vector<2,T> b)
     {
-        return a[0] * b[1] - a[1] * b[0];
+        return a.x * b.y - a.y * b.x;
     }