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.
---
 test/test-maths.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'test/test-maths.cpp')

diff --git a/test/test-maths.cpp b/test/test-maths.cpp
index a2e1953..b66b863 100644
--- a/test/test-maths.cpp
+++ b/test/test-maths.cpp
@@ -2,7 +2,9 @@
 
 #include <boost/test/data/test_case.hpp>
 #include <boost/test/unit_test.hpp>
+#include <glm/gtx/transform.hpp>
 #include <stream_support.hpp>
+#include <string_view>
 
 #include <glm/glm.hpp>
 #include <maths.h>
@@ -95,3 +97,30 @@ BOOST_AUTO_TEST_CASE(test_find_arcs_radius)
 {
 	BOOST_CHECK_CLOSE(find_arcs_radius({10.32, 26.71}, {0.4, .92}, {2.92, 22.41}, {-0.89, -0.45}), 2.29, 1);
 }
+
+static void
+compare_rotations(float a, const glm::vec3 & axis, glm::mat4 (*rotate_func)(float), std::string_view n)
+{
+	BOOST_TEST_CONTEXT(n) {
+		const auto g {glm::rotate(a, axis)}, ilt {rotate_func(a)};
+		for (int c = 0; c < 4; c++) {
+			BOOST_TEST_CONTEXT(c) {
+				for (int r = 0; r < 4; r++) {
+					BOOST_TEST_CONTEXT(r) {
+						BOOST_CHECK_CLOSE(g[c][r], ilt[c][r], 0.0001);
+					}
+				}
+			}
+		}
+	}
+}
+const auto angs = boost::unit_test::data::make({pi, half_pi, two_pi, quarter_pi, -pi, -half_pi, -quarter_pi, 0.F});
+const auto rots = boost::unit_test::data::make<std::tuple<glm::vec3, glm::mat4 (*)(float), std::string_view>>({
+		{up, rotate_yaw, "yaw"},
+		{west, rotate_pitch, "pitch"},
+		{north, rotate_roll, "roll"},
+});
+BOOST_DATA_TEST_CASE(test_rotations, angs * rots, a, ax, func, n)
+{
+	compare_rotations(a, ax, func, n);
+}
-- 
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