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Ruta de la carpeta: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\random\triangle_distribution.hpp
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/* boost random/triangle_distribution.hpp header file * * Copyright Jens Maurer 2000-2001 * Distributed under the Boost Software License, Version 1.0. (See * accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) * * See http://www.boost.org for most recent version including documentation. * * $Id: triangle_distribution.hpp 41369 2007-11-25 18:07:19Z bemandawes $ * * Revision history * 2001-02-18 moved to individual header files */ #ifndef BOOST_RANDOM_TRIANGLE_DISTRIBUTION_HPP #define BOOST_RANDOM_TRIANGLE_DISTRIBUTION_HPP #include
#include
#include
namespace boost { // triangle distribution, with a smallest, b most probable, and c largest // value. template
class triangle_distribution { public: typedef RealType input_type; typedef RealType result_type; explicit triangle_distribution(result_type a_arg = result_type(0), result_type b_arg = result_type(0.5), result_type c_arg = result_type(1)) : _a(a_arg), _b(b_arg), _c(c_arg) { assert(_a <= _b && _b <= _c); init(); } // compiler-generated copy ctor and assignment operator are fine result_type a() const { return _a; } result_type b() const { return _b; } result_type c() const { return _c; } void reset() { } template
result_type operator()(Engine& eng) { #ifndef BOOST_NO_STDC_NAMESPACE using std::sqrt; #endif result_type u = eng(); if( u <= q1 ) return _a + p1*sqrt(u); else return _c - d3*sqrt(d2*u-d1); } #if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) template
friend std::basic_ostream
& operator<<(std::basic_ostream
& os, const triangle_distribution& td) { os << td._a << " " << td._b << " " << td._c; return os; } template
friend std::basic_istream
& operator>>(std::basic_istream
& is, triangle_distribution& td) { is >> std::ws >> td._a >> std::ws >> td._b >> std::ws >> td._c; td.init(); return is; } #endif private: void init() { #ifndef BOOST_NO_STDC_NAMESPACE using std::sqrt; #endif d1 = _b - _a; d2 = _c - _a; d3 = sqrt(_c - _b); q1 = d1 / d2; p1 = sqrt(d1 * d2); } result_type _a, _b, _c; result_type d1, d2, d3, q1, p1; }; } // namespace boost #endif // BOOST_RANDOM_TRIANGLE_DISTRIBUTION_HPP
triangle_distribution.hpp
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