OpenCv fillPoly polylines

#include "stdafx.h"#include <iostream>#include <cv.h>#include <highgui.h>#include <vector>using namespace cv;using namespace std;void MyPolygon( Mat& img );int _tmain(int argc, _TCHAR* argv[]){  Mat img = imread("d://1.jpg");namedWindow("Test",CV_WINDOW_AUTOSIZE);MyPolygon(img);imshow("Test", img);waitKey(0);return 0;}void MyPolygon( Mat& img ){  /** Create some points */  Point rook_points[1][20];  rook_points[0][3] = Point( 100, 10 );  rook_points[0][0] = Point(10, 10 );  rook_points[0][1] = Point( 20, 100 );  rook_points[0][2] = Point( 100, 200 );  const Point* ppt[1] = { rook_points[0] };  int npt[] = { 4 };  //fillPoly( img, ppt,npt,1,Scalar( 0, 255, 255 ),8 );  polylines(img,ppt,npt,1,1,CV_RGB(0,255,0),2,8,0);}