From 2bb0fb39998a55b6843261d714d8067e6d12b40a Mon Sep 17 00:00:00 2001
From: EZForever <34133756+EZForever@users.noreply.github.com>
Date: Wed, 28 Oct 2020 17:26:53 +0800
Subject: [PATCH] Add test case for glm::angle() sign bug introduced by #946

---
 test/ext/ext_quaternion_trigonometric.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/ext/ext_quaternion_trigonometric.cpp b/test/ext/ext_quaternion_trigonometric.cpp
index 1c1d6084..d2371252 100644
--- a/test/ext/ext_quaternion_trigonometric.cpp
+++ b/test/ext/ext_quaternion_trigonometric.cpp
@@ -21,6 +21,12 @@ static int test_angle()
 		Error += glm::equal(A, 90.0f, Epsilon) ? 0 : 1;
 	}
 
+	{
+		glm::quat const Q = glm::angleAxis(glm::two_pi<float>() - 1.0f, glm::vec3(1, 0, 0));
+		float const A = glm::angle(Q);
+		Error += glm::equal(A, 1.0f, Epsilon) ? 1 : 0;
+	}
+
 	return Error;
 }