From a8b3118e8305fd1c668ea25e07157b625c9747ff Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Sat, 10 Apr 2021 17:29:02 +0000
Subject: add glm headers

---
 src/include/glm/gtx/fast_square_root.hpp | 92 ++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 src/include/glm/gtx/fast_square_root.hpp

(limited to 'src/include/glm/gtx/fast_square_root.hpp')

diff --git a/src/include/glm/gtx/fast_square_root.hpp b/src/include/glm/gtx/fast_square_root.hpp
new file mode 100644
index 0000000..be38ee9
--- /dev/null
+++ b/src/include/glm/gtx/fast_square_root.hpp
@@ -0,0 +1,92 @@
+/// @ref gtx_fast_square_root
+/// @file glm/gtx/fast_square_root.hpp
+///
+/// @see core (dependence)
+///
+/// @defgroup gtx_fast_square_root GLM_GTX_fast_square_root
+/// @ingroup gtx
+///
+/// Include <glm/gtx/fast_square_root.hpp> to use the features of this extension.
+///
+/// Fast but less accurate implementations of square root based functions.
+/// - Sqrt optimisation based on Newton's method,
+/// www.gamedev.net/community/forums/topic.asp?topic id=139956
+
+#pragma once
+
+// Dependency:
+#include "../common.hpp"
+#include "../exponential.hpp"
+#include "../geometric.hpp"
+
+#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
+#	ifndef GLM_ENABLE_EXPERIMENTAL
+#		pragma message("GLM: GLM_GTX_fast_square_root is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it.")
+#	else
+#		pragma message("GLM: GLM_GTX_fast_square_root extension included")
+#	endif
+#endif
+
+namespace glm
+{
+	/// @addtogroup gtx_fast_square_root
+	/// @{
+
+	/// Faster than the common sqrt function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<typename genType>
+	GLM_FUNC_DECL genType fastSqrt(genType x);
+
+	/// Faster than the common sqrt function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> fastSqrt(vec<L, T, Q> const& x);
+
+	/// Faster than the common inversesqrt function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<typename genType>
+	GLM_FUNC_DECL genType fastInverseSqrt(genType x);
+
+	/// Faster than the common inversesqrt function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL vec<L, T, Q> fastInverseSqrt(vec<L, T, Q> const& x);
+
+	/// Faster than the common length function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<typename genType>
+	GLM_FUNC_DECL genType fastLength(genType x);
+
+	/// Faster than the common length function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL T fastLength(vec<L, T, Q> const& x);
+
+	/// Faster than the common distance function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<typename genType>
+	GLM_FUNC_DECL genType fastDistance(genType x, genType y);
+
+	/// Faster than the common distance function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_DECL T fastDistance(vec<L, T, Q> const& x, vec<L, T, Q> const& y);
+
+	/// Faster than the common normalize function but less accurate.
+	///
+	/// @see gtx_fast_square_root extension.
+	template<typename genType>
+	GLM_FUNC_DECL genType fastNormalize(genType const& x);
+
+	/// @}
+}// namespace glm
+
+#include "fast_square_root.inl"
-- 
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