libcruft-util/aabb.cpp

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/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#include "aabb.hpp"
#include "debug.hpp"
using util::AABB;
//-----------------------------------------------------------------------------
template <size_t S, typename T>
AABB<S,T>::AABB (point<S,T> _p0, point<S,T> _p1):
p0 (_p0),
p1 (_p1)
{
debug::sanity (*this);
}
//-----------------------------------------------------------------------------
template <size_t S, typename T>
util::extent<S,T>
AABB<S,T>::magnitude (void) const
{
extent<S,T> out;
for (size_t i = 0; i < S; ++i)
out[i] = p1[i] - p0[i];
return out;
}
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//-----------------------------------------------------------------------------
template <size_t S, typename T>
bool
AABB<S,T>::overlaps (point<S,T> p) const
{
for (size_t i = 0; i < S; ++i)
if (p0[i] > p[i] || p1[i] < p[i])
return false;
return true;
}
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//-----------------------------------------------------------------------------
template <size_t S, typename T>
void
AABB<S,T>::expand (point<S,T> p)
{
p0 = min (p, p0);
p1 = max (p, p1);
}
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//-----------------------------------------------------------------------------
template <size_t S, typename T>
AABB<S,T>
AABB<S,T>::operator+ (vector<S,T> v) const
{
return { p0 + v, p1 + v };
}
//-----------------------------------------------------------------------------
template <size_t S, typename T>
AABB<S,T>
AABB<S,T>::operator- (vector<S,T> v) const
{
return { p0 - v, p1 - v };
}
//-----------------------------------------------------------------------------
namespace debug {
template <size_t S, typename T>
struct validator<AABB,S,T> {
static bool is_valid (const AABB<S,T> &b)
{
for (size_t i = 0; i < S; ++i)
if (b.p1[i] < b.p0[i])
return false;
return true;
}
};
}
//-----------------------------------------------------------------------------
template <size_t S, typename T>
std::ostream&
util::operator<< (std::ostream &os, AABB<S,T> b)
{
os << "AABB(" << b.p0 << ", " << b.p1 << ")";
return os;
}
//-----------------------------------------------------------------------------
#define INSTANTIATE_S_T(S,T) \
namespace util { template struct AABB<S,T>; } \
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template bool debug::valid (const AABB<S,T>&); \
template std::ostream& util::operator<< (std::ostream&, AABB<S,T>);
#define INSTANTIATE(T) \
INSTANTIATE_S_T(2,T) \
INSTANTIATE_S_T(3,T)
INSTANTIATE(uint32_t)
INSTANTIATE(uint64_t)
INSTANTIATE(float)
INSTANTIATE(double)