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/*
interval.hh -- part of flowerlib
(c) 1996 Han-Wen Nienhuys
*/
#ifndef INTERVAL_HH
#define INTERVAL_HH
#include <assert.h>
#include "real.hh"
/// a Real interval
struct Interval {
Real min, max;
void translate(Real t) {
min += t;
max += t;
}
Real operator[](int j) {
if (j==-1)
return min;
else if (j==1)
return max;
else
assert(false);
return 0.0;
}
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;
}
Interval &operator += (Real r) {
min += r;
max +=r;
return *this;
}
};
#endif // INTERVAL_HH
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