From 9506960a925367b3ac45f8bd7775b3a70cb0baec Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 14 Feb 2021 12:59:07 +0000
Subject: Add operator[] to Arc

---
 utility/maths.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/utility/maths.h b/utility/maths.h
index 22688cb..31f5960 100644
--- a/utility/maths.h
+++ b/utility/maths.h
@@ -5,7 +5,15 @@
 #include <glm/gtc/constants.hpp>
 #include <utility>
 
-using Arc = std::pair<float, float>;
+struct Arc : public std::pair<float, float> {
+	using std::pair<float, float>::pair;
+
+	float
+	operator[](unsigned int i) const
+	{
+		return i ? second : first;
+	}
+};
 
 constexpr const glm::vec3 up {0, 1, 0};
 constexpr const glm::vec3 north {0, 0, 1};
-- 
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