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#ifndef TERRAIN_H
#define TERRAIN_H
#include "quad.h"
#include <vector>
#include <math.h>
class Terrain : public Quad
{
public:
double z_mean_;
double z_mean() {
if( isnan(z_mean_) ) {
return z_mean_ =
( z[0][0] + z[0][1] +
z[1][0] + z[1][1] ) / 4.;
}
return z_mean_;
};
double z[2][2];
public:
Terrain(std::vector<double>* V_) : Quad(V_) { z_mean_ = NAN; }
virtual void split();
virtual void track_down(double x, double y, double nz, int levels);
/*protected:
virtual void set_range(double nx1, double nx2, double ny1, double ny2);*/
};
#endif/*TERRAIN_H*/
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