Danny Robson
4544a594c3
calculates the root of the sum of the squares. much like std::hypot, but of arbitrary dimension.
46 lines
1.2 KiB
C++
46 lines
1.2 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 2011-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#if defined(__UTIL_VECTOR_IPP)
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#error
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#else
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#define __UTIL_VECTOR_IPP
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#endif
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#include "./maths.hpp"
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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template <size_t D>
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util::vector<D,T>
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util::vector<S,T>::homog (void) const
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{
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static_assert (D > S, "reducing size loses data");
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return (*this).template redim<D> (0.f);
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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constexpr
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T
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util::hypot (util::vector<S,T> a, util::vector<S,T> b)
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{
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auto c = a - b;
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return std::sqrt (sum (c * c));
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}
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