From e81bc351f7a7550addea94adb9c445adb1c8ed5c Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Wed, 1 Feb 2023 00:27:05 +0000
Subject: Add helper operator to perform vec3*mat4 and perspective divide

---
 lib/maths.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/maths.h b/lib/maths.h
index c651af5..d4bcd16 100644
--- a/lib/maths.h
+++ b/lib/maths.h
@@ -125,6 +125,13 @@ operator||(const glm::vec<L, T, Q> v1, const T v2)
 	return {v1, v2};
 }
 
+inline glm::vec3
+operator%(const glm::vec3 & p, const glm::mat4 & mutation)
+{
+	const auto p2 = mutation * (p ^ 1);
+	return p2 / p2.w;
+}
+
 constexpr inline float
 arc_length(const Arc & arc)
 {
-- 
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