From 0a5d23ce263551bab3759e4ac65ecb6cfebdc892 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 2 Dec 2023 12:23:52 +0000
Subject: Add crossInt - cross product for integer vectors

---
 lib/maths.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'lib')

diff --git a/lib/maths.h b/lib/maths.h
index 67b2a15..cf369a7 100644
--- a/lib/maths.h
+++ b/lib/maths.h
@@ -67,6 +67,17 @@ sq(T v)
 	return v * v;
 }
 
+template<std::integral T, glm::qualifier Q>
+inline constexpr glm::vec<3, T, Q>
+crossInt(const glm::vec<3, T, Q> a, const glm::vec<3, T, Q> b)
+{
+	return {
+			(a.y * b.z) - (a.z * b.y),
+			(a.z * b.x) - (a.x * b.z),
+			(a.x * b.y) - (a.y * b.x),
+	};
+}
+
 template<typename R = float, typename Ta, typename Tb>
 inline constexpr auto
 ratio(Ta a, Tb b)
-- 
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