ptinpolygon.h

测试点是否落在多边形内

#pragma once

#define Global_Tolerance	1.0e-8

typedef struct _Point{
	double	x;
	double	y;
	_Point(){this->x = this->y = 0.0f;}
	_Point(double x, double y){this->x = x; this->y = y;}
	bool operator==(const _Point &pt) const
	{
		if(fabs(x-pt.x) < Global_Tolerance &&
			fabs(y-pt.y) < Global_Tolerance)
			return TRUE;
		else
			return FALSE;
	}
}Point;

int  PointInPolygon(const SHPObject *polygonObject, double x, double y);