libcruft-util/noise/rand.hpp
2015-10-06 21:19:17 +11:00

61 lines
1.6 KiB
C++

/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_NOISE_RAND_HPP
#define __UTIL_NOISE_RAND_HPP
#include "./rand/permute.hpp"
#include "./rand/hash.hpp"
namespace util { namespace noise { namespace rand {
/// generate a uniform random floating point in the range [0, 1] from a seed and vector
template <
typename U,
size_t S,
typename T,
template <size_t,typename> class Q
>
U
scalar (uint64_t seed, Q<S,T> value)
{
#if 1
return permute::scalar<U> (seed, value);
#else
return hash::scalar<U> (seed, value);
#endif
}
/// generate a coordinate type with uniform random components in the range [0, 1]
template <
template <size_t,typename> class R,
typename U,
size_t S,
typename T,
template <size_t,typename> class Q
>
R<S,U>
coord (uint64_t seed, Q<S,T> value)
{
#if 1
return permute::coord<R,U,S,T,Q> (seed, value);
#else
return hash::coord<R,U,S,T,Q> (seed, value);
#endif
}
} } }
#endif