47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#if defined(__UTIL_GEOM_ELLIPSE_IPP)
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#error
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#endif
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#define __UTIL_GEOM_ELLIPSE_IPP
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#include "sample.hpp"
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#include <cmath>
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#include <random>
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///////////////////////////////////////////////////////////////////////////////
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namespace util { namespace geom {
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template <typename T, template <size_t,typename> class K, typename G>
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struct sampler<2,T,K,G>
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{
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static util::point<2,T> fn (K<2,T> k, G &g)
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{
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std::uniform_real_distribution<T> dist;
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float phi = dist (g) * 2 * PI<T>;
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float rho = std::sqrt (dist (g));
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return util::point<2,T> {
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std::cos (phi),
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std::sin (phi)
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} * rho * k.radius + k.origin.template as<util::vector> ();
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}
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};
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} }
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