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#include <vector>
#include <cassert>
#include <2geom/d2.h>
namespace Geom{
class Quad{
public:
Quad* children[4];
std::vector<int> data;
Quad() {
for(int i = 0; i < 4; i++)
children[i] = 0;
}
typedef std::vector<int>::iterator iterator;
Rect bounds(unsigned i, double x, double y, double d) {
double dd = d/2;
switch(i % 4) {
case 0:
return Rect(Interval(x, x+dd), Interval(y, y+dd));
case 1:
return Rect(Interval(x+dd, x+d), Interval(y, y+dd));
case 2:
return Rect(Interval(x, x+dd), Interval(y+dd, y+d));
case 3:
return Rect(Interval(x+dd, x+d), Interval(y+dd, y+d));
default:
/* just to suppress warning message
* this case should be never reached */
assert(false);
}
}
};
class QuadTree{
public:
Quad* root;
double scale;
double bx0, bx1;
double by0, by1;
QuadTree() : root(0), scale(1) {}
Quad* search(double x0, double y0, double x1, double y1);
void insert(double x0, double y0, double x1, double y1, int shape);
Quad* search(Geom::Rect const &r);
void insert(Geom::Rect const &r, int shape);
void erase(Quad *q, int shape);
};
};
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
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