67 lines
1.7 KiB
C++
67 lines
1.7 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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#ifndef __UTIL_NOISE_RAND_HPP
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#define __UTIL_NOISE_RAND_HPP
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#include "./rand/permute.hpp"
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#include "./rand/hash.hpp"
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#include <cstdint>
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namespace util { namespace noise {
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using seed_t = uint64_t;
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} }
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namespace util { namespace noise { namespace rand {
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/// generate a uniform random floating point in the range [0, 1] from a seed and vector
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template <
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typename U,
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size_t S,
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typename T,
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template <size_t,typename> class Q
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>
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U
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scalar (uint64_t seed, Q<S,T> value) noexcept
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{
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#if 1
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return permute::scalar<U> (seed, value);
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#else
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return hash::scalar<U> (seed, value);
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#endif
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}
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/// generate a coordinate type with uniform random components in the range [0, 1]
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template <
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template <size_t,typename> class R,
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typename U,
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size_t S,
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typename T,
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template <size_t,typename> class Q
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>
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R<S,U>
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coord (uint64_t seed, Q<S,T> value) noexcept
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{
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#if 1
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return permute::coord<R,U,S,T,Q> (seed, value);
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#else
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return hash::coord<R,U,S,T,Q> (seed, value);
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#endif
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}
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} } }
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#endif
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