/usr/include/wfmath-1.0/wfmath/axisbox_funcs.h is in libwfmath-1.0-dev 1.0.2+dfsg1-4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | // axisbox_funcs.h (Axis-aligned box implementation)
//
// The WorldForge Project
// Copyright (C) 2000, 2001 The WorldForge Project
//
// This program 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 2 of the License, or
// (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// For information about WorldForge and its authors, please contact
// the Worldforge Web Site at http://www.worldforge.org.
//
// Author: Ron Steinke
// The implementation of this class is based on the geometric
// parts of the Tree and Placement classes from stage/shepherd/sylvanus
#ifndef WFMATH_AXIS_BOX_FUNCS_H
#define WFMATH_AXIS_BOX_FUNCS_H
#include <wfmath/axisbox.h>
#include <wfmath/point.h>
#include <wfmath/ball.h>
namespace WFMath {
template<int dim>
bool Intersection(const AxisBox<dim>& a1, const AxisBox<dim>& a2, AxisBox<dim>& out)
{
for(int i = 0; i < dim; ++i) {
out.m_low[i] = FloatMax(a1.m_low[i], a2.m_low[i]);
out.m_high[i] = FloatMin(a1.m_high[i], a2.m_high[i]);
if(out.m_low[i] > out.m_high[i])
return false;
}
out.m_low.setValid(a1.m_low.isValid() && a2.m_low.isValid());
out.m_high.setValid(a1.m_high.isValid() && a2.m_high.isValid());
return true;
}
template<int dim>
AxisBox<dim> Union(const AxisBox<dim>& a1, const AxisBox<dim>& a2)
{
AxisBox<dim> out;
for(int i = 0; i < dim; ++i) {
out.m_low[i] = FloatMin(a1.m_low[i], a2.m_low[i]);
out.m_high[i] = FloatMax(a1.m_high[i], a2.m_high[i]);
}
out.m_low.setValid(a1.m_low.isValid() && a2.m_low.isValid());
out.m_high.setValid(a1.m_high.isValid() && a2.m_high.isValid());
return out;
}
template<int dim>
AxisBox<dim>& AxisBox<dim>::setCorners(const Point<dim>& p1, const Point<dim>& p2,
bool ordered)
{
if(ordered) {
m_low = p1;
m_high = p2;
return *this;
}
for(int i = 0; i < dim; ++i) {
if(p1[i] > p2[i]) {
m_low[i] = p2[i];
m_high[i] = p1[i];
}
else {
m_low[i] = p1[i];
m_high[i] = p2[i];
}
}
m_low.setValid();
m_high.setValid();
return *this;
}
template<int dim>
Point<dim> AxisBox<dim>::getCorner(size_t i) const
{
if(i < 1)
return m_low;
if(i >= (1 << dim) - 1)
return m_high;
Point<dim> out;
for(int j = 0; j < dim; ++j)
out[j] = (i & (1 << j)) ? m_high[j] : m_low[j];
out.setValid(m_low.isValid() && m_high.isValid());
return out;
}
template<int dim>
inline Ball<dim> AxisBox<dim>::boundingSphere() const
{
return Ball<dim>(getCenter(), Distance(m_low, m_high) / 2);
}
template<int dim>
inline Ball<dim> AxisBox<dim>::boundingSphereSloppy() const
{
return Ball<dim>(getCenter(), SloppyDistance(m_low, m_high) / 2);
}
template<int dim, template<class, class> class container>
AxisBox<dim> BoundingBox(const container<AxisBox<dim>, std::allocator<AxisBox<dim> > >& c)
{
typename container<AxisBox<dim>, std::allocator<AxisBox<dim> > >::const_iterator i = c.begin(), end = c.end();
if(i == end) {
return AxisBox<dim>();
}
Point<dim> low = i->lowCorner(), high = i->highCorner();
bool low_valid = low.isValid(), high_valid = high.isValid();
while(++i != end) {
const Point<dim> &new_low = i->lowCorner(), &new_high = i->highCorner();
low_valid = low_valid && new_low.isValid();
high_valid = high_valid && new_high.isValid();
for(int j = 0; j < dim; ++j) {
low[j] = FloatMin(low[j], new_low[j]);
high[j] = FloatMax(high[j], new_high[j]);
}
}
low.setValid(low_valid);
high.setValid(high_valid);
return AxisBox<dim>(low, high, true);
}
template<int dim, template<class, class> class container>
AxisBox<dim> BoundingBox(const container<Point<dim>, std::allocator<Point<dim> > >& c)
{
typename container<Point<dim>, std::allocator<Point<dim> > >::const_iterator i = c.begin(), end = c.end();
if(i == end) {
return AxisBox<dim>();
}
Point<dim> low = *i, high = *i;
bool valid = i->isValid();
while(++i != end) {
valid = valid && i->isValid();
for(int j = 0; j < dim; ++j) {
low[j] = FloatMin(low[j], (*i)[j]);
high[j] = FloatMax(high[j], (*i)[j]);
}
}
low.setValid(valid);
high.setValid(valid);
return AxisBox<dim>(low, high, true);
}
// This is here, instead of defined in the class, to
// avoid include order problems
template<int dim>
inline AxisBox<dim> Point<dim>::boundingBox() const
{
return AxisBox<dim>(*this, *this, true);
}
template<int dim>
Point<dim> Point<dim>::toParentCoords(const AxisBox<dim>& coords) const
{
return coords.lowCorner() + (*this - Point().setToOrigin());
}
template<int dim>
Point<dim> Point<dim>::toLocalCoords(const AxisBox<dim>& coords) const
{
return Point().setToOrigin() + (*this - coords.lowCorner());
}
} // namespace WFMath
#endif // WFMATH_AXIS_BOX_FUNCS_H
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