Merge pull request #4 from FOSSEE/develop

merging dev into master

1 files changed, 170 insertions, 0 deletions

diff --git a/include/gal/opengl/glm/gtc/random.inl b/include/gal/opengl/glm/gtc/random.inl
new file mode 100644
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+++ b/include/gal/opengl/glm/gtc/random.inl
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+///////////////////////////////////////////////////////////////////////////////////
+/// OpenGL Mathematics (glm.g-truc.net)
+///
+/// Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net)
+/// Permission is hereby granted, free of charge, to any person obtaining a copy
+/// of this software and associated documentation files (the "Software"), to deal
+/// in the Software without restriction, including without limitation the rights
+/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+/// copies of the Software, and to permit persons to whom the Software is
+/// furnished to do so, subject to the following conditions:
+/// 
+/// The above copyright notice and this permission notice shall be included in
+/// all copies or substantial portions of the Software.
+/// 
+/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+/// THE SOFTWARE.
+///
+/// @ref gtc_random
+/// @file glm/gtc/random.inl
+/// @date 2011-09-19 / 2012-04-07
+/// @author Christophe Riccio
+///////////////////////////////////////////////////////////////////////////////////
+
+#include <ctime>
+#include <cassert>
+
+namespace glm{
+namespace detail
+{
+	struct compute_linearRand
+	{
+		template <typename T>
+		GLM_FUNC_QUALIFIER T operator() (T const & Min, T const & Max) const;
+/*
+		{
+			GLM_STATIC_ASSERT(0, "'linearRand' invalid template parameter type. GLM_GTC_random only supports floating-point template types.");
+			return Min;
+		}
+*/
+	};
+    
+	template <>
+	GLM_FUNC_QUALIFIER half compute_linearRand::operator()<half> (half const & Min, half const & Max) const
+	{
+		return half(float(std::rand()) / float(RAND_MAX) * (float(Max) - float(Min)) + float(Min));
+	}
+
+	template <>
+	GLM_FUNC_QUALIFIER float compute_linearRand::operator()<float> (float const & Min, float const & Max) const
+	{
+		return float(std::rand()) / float(RAND_MAX) * (Max - Min) + Min;
+	}
+
+	template <>
+	GLM_FUNC_QUALIFIER double compute_linearRand::operator()<double> (double const & Min, double const & Max) const
+	{
+		return double(std::rand()) / double(RAND_MAX) * (Max - Min) + Min;
+	}
+    
+	template <>
+	GLM_FUNC_QUALIFIER long double compute_linearRand::operator()<long double> (long double const & Min, long double const & Max) const
+	{
+		return (long double)(std::rand()) / (long double)(RAND_MAX) * (Max - Min) + Min;
+	}
+}//namespace detail
+
+	template <typename genType> 
+	GLM_FUNC_QUALIFIER genType linearRand
+	(
+		genType const & Min, 
+		genType const & Max
+	)
+	{
+		return detail::compute_linearRand()(Min, Max);
+	}
+
+	VECTORIZE_VEC_VEC(linearRand)
+
+	template <typename genType> 
+	GLM_FUNC_QUALIFIER genType gaussRand
+	(
+		genType const & Mean,	
+		genType const & Deviation
+	)
+	{
+		genType w, x1, x2;
+	
+		do
+		{
+			x1 = linearRand(genType(-1), genType(1));
+			x2 = linearRand(genType(-1), genType(1));
+		
+			w = x1 * x1 + x2 * x2;
+		} while(w > genType(1));
+	
+		return x2 * Deviation * Deviation * sqrt((genType(-2) * log(w)) / w) + Mean;
+	}
+
+	VECTORIZE_VEC_VEC(gaussRand)
+
+	template <typename T>
+	GLM_FUNC_QUALIFIER detail::tvec2<T> diskRand
+	(
+		T const & Radius
+	)
+	{		
+		detail::tvec2<T> Result(T(0));
+		T LenRadius(T(0));
+		
+		do
+		{
+			Result = linearRand(detail::tvec2<T>(-Radius), detail::tvec2<T>(Radius));
+			LenRadius = length(Result);
+		}
+		while(LenRadius > Radius);
+		
+		return Result;
+	}
+	
+	template <typename T>
+	GLM_FUNC_QUALIFIER detail::tvec3<T> ballRand
+	(
+		T const & Radius
+	)
+	{		
+		detail::tvec3<T> Result(T(0));
+		T LenRadius(T(0));
+		
+		do
+		{
+			Result = linearRand(detail::tvec3<T>(-Radius), detail::tvec3<T>(Radius));
+			LenRadius = length(Result);
+		}
+		while(LenRadius > Radius);
+		
+		return Result;
+	}
+	
+	template <typename T> 
+	GLM_FUNC_QUALIFIER detail::tvec2<T> circularRand
+	(
+		T const & Radius
+	)
+	{
+		T a = linearRand(T(0), T(6.283185307179586476925286766559f));
+		return detail::tvec2<T>(cos(a), sin(a)) * Radius;		
+	}
+	
+	template <typename T> 
+	GLM_FUNC_QUALIFIER detail::tvec3<T> sphericalRand
+	(
+		T const & Radius
+	)
+	{
+		T z = linearRand(T(-1), T(1));
+		T a = linearRand(T(0), T(6.283185307179586476925286766559f));
+	
+		T r = sqrt(T(1) - z * z);
+	
+		T x = r * cos(a);
+		T y = r * sin(a);
+	
+		return detail::tvec3<T>(x, y, z) * Radius;	
+	}
+}//namespace glm