/****************************************************************File Name: grid.C  Author: Tian Zhang, CS Dept., Univ. of Wisconsin-Madison, 1995               Copyright(c) 1995 by Tian Zhang                   All Rights ReservedPermission to use, copy and modify this software must be grantedby the author, provided that the above copyright notice appear in all relevant copies and that both that copyright notice and this permission notice appear in all relevant supporting documentations. Comments and additions may be sent the author at zhang@cs.wisc.edu.******************************************************************/#include "global.h"#include "util.h"#include "vector.h"#include "rectangle.h"#include "grid.h"void Grid::Add(Vector v){int i = (int) floor(v.Value(0)/rsize);int j = (int) floor(v.Value(1)/rsize);if (units[i][j]==0) {	units[i][j]=1;	count++;	}}int Grid::Count(){return count;}Grid::~Grid(){for (int i=0;i<xsize;i++)	delete [] units[i];delete [] units;}Grid::Grid(const Grid& g){rsize = g.rsize;boundary = g.boundary;xsize = g.xsize;ysize = g.ysize;count = g.count;units = g.units;}Grid::Grid(double r, const Rectangle& bound) {rsize = r;boundary = bound;xsize = (int)floor(bound.Length(0)/r+1);ysize = (int)floor(bound.Length(1)/r+1);count = 0;units = new short*[xsize];for (int i=0;i<xsize;i++) 	units[i] = new short[ysize];for (i=0;i<xsize;i++)	for (int j=0;j<ysize;j++)		units[i][j]=0;}