From c068f22329d5cc722622a2183bbb22eef2093df7 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Mon, 24 Aug 2026 11:16:07 +0200
Subject: initial import

---
 src/libraries/glm/gtx/vector_angle.inl | 57 ++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100755 src/libraries/glm/gtx/vector_angle.inl

(limited to 'src/libraries/glm/gtx/vector_angle.inl')

diff --git a/src/libraries/glm/gtx/vector_angle.inl b/src/libraries/glm/gtx/vector_angle.inl
new file mode 100755
index 0000000..183f1c7
--- /dev/null
+++ b/src/libraries/glm/gtx/vector_angle.inl
@@ -0,0 +1,57 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2012 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2005-12-30
+// Updated : 2008-09-29
+// Licence : This source is under MIT License
+// File    : glm/gtx/vector_angle.inl
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace glm
+{
+	template <typename genType> 
+	GLM_FUNC_QUALIFIER typename genType::value_type angle
+	(
+		genType const & x, 
+		genType const & y
+	)
+	{
+		return degrees(acos(dot(x, y)));
+	}
+
+	//! \todo epsilon is hard coded to 0.01
+	template <typename valType> 
+	GLM_FUNC_QUALIFIER valType orientedAngle
+	(
+		detail::tvec2<valType> const & x, 
+		detail::tvec2<valType> const & y
+	)
+	{
+#ifdef GLM_FORCE_RADIANS
+		valType const Angle(acos(dot(x, y)));
+#else
+		valType const Angle(glm::degrees(acos(dot(x, y))));
+#endif
+		detail::tvec2<valType> const TransformedVector(glm::rotate(x, Angle));
+		if(all(epsilonEqual(y, TransformedVector, valType(0.01))))
+			return Angle;
+		else
+			return -Angle;
+	}
+
+	template <typename valType>
+	GLM_FUNC_QUALIFIER valType orientedAngle
+	(
+		detail::tvec3<valType> const & x,
+		detail::tvec3<valType> const & y,
+		detail::tvec3<valType> const & ref
+	)
+	{
+		valType const Angle(glm::degrees(glm::acos(glm::dot(x, y))));
+
+		if(glm::dot(ref, glm::cross(x, y)) < valType(0))
+			return -Angle;
+		else
+			return Angle;
+	}
+}//namespace glm
-- 
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