From e7420b24c30d9c25bdcc9369fb1ae7a409fda7d4 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Wed, 3 Mar 2021 00:07:16 +0000
Subject: Our own matrix rotations

Simpler and faster than glm's as we don't need arbitrary axes.
---
 lib/maths.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'lib/maths.h')

diff --git a/lib/maths.h b/lib/maths.h
index c072283..d304b65 100644
--- a/lib/maths.h
+++ b/lib/maths.h
@@ -1,6 +1,7 @@
 #ifndef MATH_H
 #define MATH_H
 
+#include <cmath>
 #include <glm/glm.hpp>
 #include <glm/gtc/constants.hpp>
 #include <utility>
@@ -29,6 +30,26 @@ constexpr auto two_pi {glm::two_pi<float>()};
 
 glm::mat4 flat_orientation(const glm::vec3 & diff);
 
+// C++ wrapper for C's sincosf, but with references, not pointers
+inline auto
+sincosf(float a, float & s, float & c)
+{
+	return sincosf(a, &s, &c);
+}
+
+inline std::pair<float, float>
+sincosf(float a)
+{
+	std::pair<float, float> sc;
+	sincosf(a, &sc.first, &sc.second);
+	return sc;
+}
+
+glm::mat4 rotate_roll(float);
+glm::mat4 rotate_yaw(float);
+glm::mat4 rotate_pitch(float);
+glm::mat4 rotate_ypr(glm::vec3);
+
 float vector_yaw(const glm::vec3 & diff);
 float vector_pitch(const glm::vec3 & diff);
 
-- 
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