226 lines
5.2 KiB
C++
226 lines
5.2 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 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#include "./aabb.hpp"
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#include "./iostream.hpp"
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#include "../coord/iostream.hpp"
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#include "../debug.hpp"
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using util::geom::aabb;
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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aabb<S,T>::aabb (point<S,T> _p0, point<S,T> _p1):
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p0 (_p0),
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p1 (_p1)
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{
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debug::sanity (*this);
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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T
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aabb<S,T>::diameter (void) const
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{
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return magnitude ().diameter ();
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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util::extent<S,T>
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aabb<S,T>::magnitude (void) const
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{
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extent<S,T> out;
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for (size_t i = 0; i < S; ++i)
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out[i] = p1[i] - p0[i];
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return out;
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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bool
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aabb<S,T>::overlaps (point<S,T> p) const
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{
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for (size_t i = 0; i < S; ++i)
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if (p0[i] > p[i] || p1[i] < p[i])
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return false;
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return true;
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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util::point<S,T>
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aabb<S,T>::closest (point<S,T> q) const
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{
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point<S,T> res;
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for (size_t i = 0; i < S; ++i)
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res[i] = q[i] < p0[i] ? p0[i] :
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q[i] > p1[i] ? p1[i] :
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q[i];
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return res;
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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aabb<S,T>
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aabb<S,T>::expanded (vector<S,T> mag) const noexcept
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{
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CHECK (all (mag >= T{0}));
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CHECK (all (mag < p1 - p0));
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return {
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p0 - mag / T{2},
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p1 + mag / T{2}
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};
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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aabb<S,T>
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aabb<S,T>::expanded (T t) const noexcept
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{
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CHECK_GE (t, T{0});
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CHECK (all (t < p1 - p0));
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return {
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p0 - t / T{2},
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p1 + t / T{2}
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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aabb<S,T>
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aabb<S,T>::contracted (util::vector<S,T> mag) const noexcept
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{
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CHECK (all (mag > T{0}));
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CHECK (all (mag <= p1 - p0));
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return {
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p0 + mag / T{2},
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p1 - mag / T{2}
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};
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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aabb<S,T>
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aabb<S,T>::contracted (T mag) const noexcept
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{
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CHECK_GE (mag, T{0});
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CHECK (all (mag <= p1 - p0));
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return {
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p0 + mag / T{2},
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p1 - mag / T{2}
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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void
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aabb<S,T>::cover (point<S,T> p)
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{
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p0 = min (p, p0);
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p1 = max (p, p1);
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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aabb<S,T>
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aabb<S,T>::operator+ (vector<S,T> v) const
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{
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return { p0 + v, p1 + v };
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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aabb<S,T>
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aabb<S,T>::operator- (vector<S,T> v) const
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{
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return { p0 - v, p1 - v };
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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bool
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aabb<S,T>::operator== (const aabb<S,T> rhs) const
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{
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return rhs.p0 == p0 && rhs.p1 == p1;
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}
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//-----------------------------------------------------------------------------
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namespace util::debug {
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template <size_t S, typename T>
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struct validator<aabb<S,T>> {
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static bool is_valid (const aabb<S,T> &b)
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{
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for (size_t i = 0; i < S; ++i)
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if (b.p1[i] < b.p0[i])
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return false;
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return true;
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}
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};
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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std::ostream&
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util::geom::operator<< (std::ostream &os, util::geom::aabb<S,T> b)
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{
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os << "aabb(" << b.p0 << ", " << b.p1 << ")";
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return os;
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}
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//-----------------------------------------------------------------------------
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#define INSTANTIATE_S_T(S,T) \
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namespace util::geom { template struct aabb<S,T>; } \
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template bool util::debug::is_valid (const aabb<S,T>&); \
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template std::ostream& util::geom::operator<< (std::ostream&, aabb<S,T>);
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#define INSTANTIATE(T) \
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INSTANTIATE_S_T(2,T) \
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INSTANTIATE_S_T(3,T)
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INSTANTIATE( int32_t)
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INSTANTIATE( int64_t)
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INSTANTIATE(uint32_t)
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INSTANTIATE(uint64_t)
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INSTANTIATE(float)
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INSTANTIATE(double)
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