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#include "glt_bbox.h"
/*! \file
\ingroup Math
*/
#include <iostream>
using namespace std;
#include "glt_matrix4.h"
#include "glt_viewport.h"
BoundingBox::BoundingBox()
: _defined(false)
{
}
BoundingBox::BoundingBox(const Vector &min,const Vector &max)
: _defined(true), _min(min), _max(max)
{
}
bool &BoundingBox::defined() { return _defined; }
const bool BoundingBox::defined() const { return _defined; }
Vector &BoundingBox::min() { return _min; }
const Vector &BoundingBox::min() const { return _min; }
Vector &BoundingBox::max() { return _max; }
const Vector &BoundingBox::max() const { return _max; }
Vector
BoundingBox::center() const
{
return (_min+_max)*0.5;
}
real BoundingBox::width() const { return _max[0] - _min[0]; }
real BoundingBox::height() const { return _max[1] - _min[1]; }
real BoundingBox::depth() const { return _max[2] - _min[2]; }
void
BoundingBox::points(std::vector<Vector> &p) const
{
p.clear();
p.reserve(8);
p.push_back(Vector(_min.x(), _min.y(), _min.z()));
p.push_back(Vector(_min.x(), _min.y(), _max.z()));
p.push_back(Vector(_min.x(), _max.y(), _min.z()));
p.push_back(Vector(_min.x(), _max.y(), _max.z()));
p.push_back(Vector(_max.x(), _min.y(), _min.z()));
p.push_back(Vector(_max.x(), _min.y(), _max.z()));
p.push_back(Vector(_max.x(), _max.y(), _min.z()));
p.push_back(Vector(_max.x(), _max.y(), _max.z()));
}
void
BoundingBox::reset()
{
_defined = false;
}
BoundingBox &
BoundingBox::operator+=(const Vector &p)
{
if (!_defined)
{
_min = _max = p;
_defined = true;
}
else
{
_min.vmin(p);
_max.vmax(p);
}
return *this;
}
BoundingBox &
BoundingBox::operator+=(const vector<Vector> &p)
{
if (!p.size())
return *this;
uint32 i = 0;
if (!_defined)
{
_min = _max = p.front();
_defined = true;
i = 1;
}
for (; i<p.size(); i++)
{
_min.vmin(p[i]);
_max.vmax(p[i]);
}
return *this;
}
BoundingBox &
BoundingBox::operator+=(const BoundingBox &box)
{
if (!_defined && box._defined)
{
_min = box._min;
_max = box._max;
_defined = true;
return *this;
}
if (_defined && box._defined)
{
_min.vmin(box._min);
_max.vmax(box._max);
}
return *this;
}
BoundingBox &
BoundingBox::operator*=(const BoundingBox &box)
{
if (_defined && box._defined)
{
_min.vmax(box._min);
_max.vmin(box._max);
if
(
_min.x()>_max.x() ||
_min.y()>_max.y() ||
_min.z()>_max.z()
)
_defined = false;
}
else
_defined = false;
return *this;
}
bool
BoundingBox::operator==(const BoundingBox &box) const
{
if (!_defined && !box._defined)
return true;
if (_defined && box._defined)
return _min==box._min && _max==box._max;
else
return false;
}
bool
BoundingBox::inside(const Vector &pos) const
{
if (pos.x()<_min.x() || pos.x()>_max.x()) return false;
if (pos.y()<_min.y() || pos.y()>_max.y()) return false;
if (pos.z()<_min.z() || pos.z()>_max.z()) return false;
return true;
}
bool
BoundingBox::intersects(const BoundingBox &box) const
{
if (!_defined || !box._defined)
return false;
if (_min.x() > box._max.x()) return false;
if (_min.y() > box._max.y()) return false;
if (_min.z() > box._max.z()) return false;
if (_max.x() < box._min.x()) return false;
if (_max.y() < box._min.y()) return false;
if (_max.z() < box._min.z()) return false;
return true;
}
bool
BoundingBox::project(const GltMatrix &model,const GltMatrix &proj,const GltViewport &view)
{
bool ok = true;
vector<Vector> pnt;
points(pnt);
reset();
for (int j=0; j<(int)pnt.size(); j++)
{
ok &= pnt[j].project(model,proj,view);
operator+=(pnt[j]);
}
return ok;
}
ostream &
operator<<(ostream &os, const BoundingBox &b)
{
os << b.min() << " - " << b.max();
return os;
}
BoundingBox sum(const BoundingBox &a,const BoundingBox &b)
{
BoundingBox tmp(a);
tmp += b;
return tmp;
}
BoundingBox intersection(const BoundingBox &a,const BoundingBox &b)
{
BoundingBox tmp(a);
tmp *= b;
return tmp;
}
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