基本绘图-----学习记录（5）

#include "opencv2/highgui/highgui.hpp"
#include "opencv2/core/core.hpp"
#include "iostream"
#define w 400
using namespace std;
using namespace cv;

void MyEllipse( Mat, double ); //创建椭圆
void MyFilledCircle( Mat, Point );//创建圆
void MyPolygon( Mat );//创建一个凸多边形
void MyLine( Mat, Point, Point );//创建直线

int main(int argc, char* argv[])
{
	char* name1 = "yuanzi";
	char* name2 = "bangzi";
	//char window1[] = "yuanzi";  //另一种命名窗口方式，其实窗口名字只要是指针类型就可以了，指针变量指向引用
	//char window2[] = "bangzi";  //数组可以看做指针

	namedWindow( name1, 1 );
	namedWindow( name2, 1 );
	
	Mat yuanzi_image = Mat::zeros( w, w, CV_8UC3 );
	Mat bangzi_image = Mat::zeros( w, w, CV_8UC3 );
	MyEllipse( yuanzi_image, 90 );
	MyEllipse( yuanzi_image, 0 );
	MyEllipse( yuanzi_image, 45 );
	MyEllipse( yuanzi_image, -45);
	MyFilledCircle( yuanzi_image, Point( w/2, w/2 ) );

	MyPolygon( bangzi_image );
	rectangle( bangzi_image, Point( 0, 7*w/8), Point( w, w ), Scalar( 255, 0, 255 ), -1, 8 );
	MyLine( bangzi_image, Point( 0, 15*w/16 ), Point( w, 15*w/16 ) );
	MyLine( bangzi_image, Point( w/4, 7*w/8 ), Point( w/4, w ) );
	MyLine( bangzi_image, Point( w/2, 7*w/8 ), Point( w/2, w ) );
	MyLine( bangzi_image, Point( 3*w/4, 7*w/8 ), Point( 3*w/4, w ) );
	imshow( name1, yuanzi_image );
	imshow( name2, bangzi_image );
	waitKey(0);
	return 0;
}


void MyEllipse( Mat map, double angle ){
	int thickness = 2;
	int lineType = 8;
	ellipse( map, Point( w/2, w/2 ), Size( w/4, w/2), angle, 0, 360, Scalar( 255, 0 ,0 ), thickness, lineType);//size是矩形的大小，将椭圆框住，其他参数线粗，线的类型
}

void MyFilledCircle( Mat map, Point center ){
	int thickness = -1;
	int lineType = 8;
	circle( map, center, w/32, Scalar( 0, 255, 0), thickness, lineType );
}

void MyPolygon( Mat map ){
	int lineType = 8;
	/** 创建一些点 */
	Point rook_points[1][20];
	rook_points[0][0] = Point( w/4.0, 7*w/8.0 );
	rook_points[0][1] = Point( 3*w/4.0, 7*w/8.0 );
	rook_points[0][2] = Point( 3*w/4.0, 13*w/16.0 );
	rook_points[0][3] = Point( 11*w/16.0, 13*w/16.0 );
	rook_points[0][4] = Point( 19*w/32.0, 3*w/8.0 );
	rook_points[0][5] = Point( 3*w/4.0, 3*w/8.0 );
	rook_points[0][6] = Point( 3*w/4.0, w/8.0 );
	rook_points[0][7] = Point( 26*w/40.0, w/8.0 );
	rook_points[0][8] = Point( 26*w/40.0, w/4.0 );
	rook_points[0][9] = Point( 22*w/40.0, w/4.0 );
	rook_points[0][10] = Point( 22*w/40.0, w/8.0 );
	rook_points[0][11] = Point( 18*w/40.0, w/8.0 );
	rook_points[0][12] = Point( 18*w/40.0, w/4.0 );
	rook_points[0][13] = Point( 14*w/40.0, w/4.0 );
	rook_points[0][14] = Point( 14*w/40.0, w/8.0 );
	rook_points[0][15] = Point( w/4.0, w/8.0 );
	rook_points[0][16] = Point( w/4.0, 3*w/8.0 );
	rook_points[0][17] = Point( 13*w/32.0, 3*w/8.0 );
	rook_points[0][18] = Point( 5*w/16.0, 13*w/16.0 );
	rook_points[0][19] = Point( w/4.0, 13*w/16.0) ;
	const Point* ppt[1] = { rook_points[0] };  //这个是指针数组（妹的，记反了），数组中的每个元素都是一个指针
	// ppt[0]指向这个二维数组的点
	int npt[] = { 20 };  //不限制大小的一个数组，npt是指针变量，里面存着首地址
	fillPoly( map, ppt, npt, 1, Scalar( 255 , 255, 0 ), lineType );

}

void MyLine( Mat map, Point start, Point end ){
	int thickness  = 2;
	int lineType = 8;
	line( map, start, end, Scalar( 255, 255, 255 ), thickness, lineType );

}