Merge pull request #4 from FOSSEE/develop

merging dev into master

1 files changed, 75 insertions, 0 deletions

diff --git a/include/gal/opengl/glm/gtx/fast_trigonometry.inl b/include/gal/opengl/glm/gtx/fast_trigonometry.inl
new file mode 100644
index 0000000..b2179a6
--- /dev/null
+++ b/include/gal/opengl/glm/gtx/fast_trigonometry.inl
@@ -0,0 +1,75 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2006-01-08
+// Updated : 2011-10-14
+// Licence : This source is under MIT License
+// File    : glm/gtx/fast_trigonometry.inl
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace glm
+{
+	// sin
+	template <typename T> 
+	GLM_FUNC_QUALIFIER T fastSin(T const & x)
+	{
+		return x - ((x * x * x) / T(6)) + ((x * x * x * x * x) / T(120)) - ((x * x * x * x * x * x * x) / T(5040));
+	}
+
+	VECTORIZE_VEC(fastSin)
+
+	// cos
+	template <typename T> 
+	GLM_FUNC_QUALIFIER T fastCos(T const & x)
+	{
+		return T(1) - (x * x * T(0.5)) + (x * x * x * x * T(0.041666666666)) - (x * x * x * x * x * x * T(0.00138888888888));
+	}
+
+	VECTORIZE_VEC(fastCos)
+
+	// tan
+	template <typename T> 
+	GLM_FUNC_QUALIFIER T fastTan(T const & x)
+	{
+		return x + (x * x * x * T(0.3333333333)) + (x * x * x * x * x * T(0.1333333333333)) + (x * x * x * x * x * x * x * T(0.0539682539));
+	}
+
+	VECTORIZE_VEC(fastTan)
+
+	// asin
+	template <typename T> 
+	GLM_FUNC_QUALIFIER T fastAsin(T const & x)
+	{
+		return x + (x * x * x * T(0.166666667)) + (x * x * x * x * x * T(0.075)) + (x * x * x * x * x * x * x * T(0.0446428571)) + (x * x * x * x * x * x * x * x * x * T(0.0303819444));// + (x * x * x * x * x * x * x * x * x * x * x * T(0.022372159));
+	}
+
+	VECTORIZE_VEC(fastAsin)
+
+	// acos
+	template <typename T> 
+	GLM_FUNC_QUALIFIER T fastAcos(T const & x)
+	{
+		return T(1.5707963267948966192313216916398) - fastAsin(x); //(PI / 2)
+	}
+
+	VECTORIZE_VEC(fastAcos)
+
+	// atan
+	template <typename T> 
+	GLM_FUNC_QUALIFIER T fastAtan(T const & y, T const & x)
+	{
+		T sgn = sign(y) * sign(x);
+		return abs(fastAtan(y / x)) * sgn;
+	}
+
+	VECTORIZE_VEC_VEC(fastAtan)
+
+	template <typename T> 
+	GLM_FUNC_QUALIFIER T fastAtan(T const & x)
+	{
+		return x - (x * x * x * T(0.333333333333)) + (x * x * x * x * x * T(0.2)) - (x * x * x * x * x * x * x * T(0.1428571429)) + (x * x * x * x * x * x * x * x * x * T(0.111111111111)) - (x * x * x * x * x * x * x * x * x * x * x * T(0.0909090909));
+	}
+
+	VECTORIZE_VEC(fastAtan)
+
+}//namespace glm