libcruft-util/maths.cpp

48 lines
1.5 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 2010-2014 Danny Robson <danny@nerdcruft.net>
*/
#include "maths.hpp"
#include <type_traits>
///////////////////////////////////////////////////////////////////////////////
template <typename T>
T
util::log2up (T v)
{
return log2 ((v << 1) - 1);
}
template uint32_t util::log2up (uint32_t);
template uint64_t util::log2up (uint64_t);
///////////////////////////////////////////////////////////////////////////////
template const float util::PI<float>;
template const double util::PI<double>;
///////////////////////////////////////////////////////////////////////////////
// Simple instantiations. Some functions aren't used internally to the library
// so it's easier to instantiate early and check for broken code at library
// build time.
template float util::limit (float, float, float);
template float util::smoothstep (float, float, float);
template double util::smoothstep (double, double, double);