From 80529930ea3bc874c8da22c66343745ff6fdd45b Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 24 Feb 2024 00:10:27 +0000
Subject: Simplify vector addition/subtraction with differnt types

Automatically applies correct rounding with float to int operations, adjusts test
expectations accordingly.
---
 lib/maths.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'lib/maths.h')

diff --git a/lib/maths.h b/lib/maths.h
index a867c39..5886326 100644
--- a/lib/maths.h
+++ b/lib/maths.h
@@ -32,6 +32,34 @@ constexpr auto quarter_pi {half_pi / 2};
 constexpr auto pi {glm::pi<float>()};
 constexpr auto two_pi {glm::two_pi<float>()};
 
+template<glm::length_t D>
+constexpr inline GlobalPosition<D>
+operator+(const GlobalPosition<D> & g, const RelativePosition<D> & r)
+{
+	return g + GlobalPosition<D>(glm::round(r));
+}
+
+template<glm::length_t D>
+constexpr inline GlobalPosition<D>
+operator+(const GlobalPosition<D> & g, const CalcPosition<D> & r)
+{
+	return g + GlobalPosition<D>(r);
+}
+
+template<glm::length_t D>
+constexpr inline GlobalPosition<D>
+operator-(const GlobalPosition<D> & g, const RelativePosition<D> & r)
+{
+	return g - GlobalPosition<D>(glm::round(r));
+}
+
+template<glm::length_t D>
+constexpr inline GlobalPosition<D>
+operator-(const GlobalPosition<D> & g, const CalcPosition<D> & r)
+{
+	return g - GlobalPosition<D>(r);
+}
+
 glm::mat4 flat_orientation(const Rotation3D & diff);
 
 // C++ wrapper for C's sincosf, but with references, not pointers
-- 
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