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/*
some 2D geometrical concepts
*/
#ifndef BOXES_HH
#define BOXES_HH
#include "textdb.hh"
#include "real.hh"
#include "vray.hh"
/// 2d vector
struct Offset {
Real x,y;
Offset operator+(Offset o)const {
Offset r(*this);
r+=o;
return r;
}
Offset operator+=(Offset o) {
x+=o.x;
y+=o.y;
return *this;
}
Offset(Real ix , Real iy) {
x=ix;
y=iy;
}
Offset() {
x=0.0;
y=0.0;
}
};
/// a Real interval
struct Interval {
Real min, max;
void translate(Real t) {
min += t;
max += t;
}
void unite(Interval h) {
if (h.min<min)
min = h.min;
if (h.max>max)
max = h.max;
}
Real length() const;
void set_empty() ;
bool empty() { return min > max; }
Interval() {
set_empty();
}
Interval(Real m, Real M) {
min =m;
max = M;
}
};
/// a 4-tuple of #Real#s
struct Box {
Interval x, y;
void translate(Offset o) {
x.translate(o.x);
y.translate(o.y);
}
void unite(Box b) {
x.unite(b.x);
y.unite(b.y);
}
Box(svec<Real> );
Box();
Box(Interval ix, Interval iy);
};
#endif
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