From 9c2fce90b58b65b6c52802657fe5aff602d4afb2 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 18 Dec 2022 14:04:23 +0000
Subject: Helper for midpoint of pair

---
 lib/maths.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/maths.h b/lib/maths.h
index 1c07baa..5bb69d3 100644
--- a/lib/maths.h
+++ b/lib/maths.h
@@ -3,6 +3,7 @@
 #include <cmath>
 #include <glm/glm.hpp>
 #include <glm/gtc/constants.hpp>
+#include <numeric>
 #include <utility>
 
 struct Arc : public std::pair<float, float> {
@@ -130,6 +131,13 @@ std::pair<glm::vec2, bool> find_arc_centre(glm::vec2 start, glm::vec2 ad, glm::v
 std::pair<float, float> find_arcs_radius(glm::vec2 start, float entrys, glm::vec2 end, float entrye);
 float find_arcs_radius(glm::vec2 start, glm::vec2 ad, glm::vec2 end, glm::vec2 bd);
 
+template<typename T>
+auto
+midpoint(const std::pair<T, T> & v)
+{
+	return std::midpoint(v.first, v.second);
+}
+
 // Conversions
 template<typename T>
 inline constexpr auto
-- 
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