OpenCV基础绘图

代码出处：
https://github.com/opencv/opencv/blob/master/samples/cpp/tutorial_code/core/Matrix/Drawing_1.cpp
1. 列表内容

#include "stdafx.h"
#include <opencv\cv.h>
#include <opencv\highgui.h>
#define w 400
using namespace cv;


void MyEllipse(Mat img, double angle);
void MyFilledCircle(Mat img, Point center);
void MyPolygon(Mat img);
void MyLine(Mat img, Point start, Point end);

int _tmain(int argc, _TCHAR* argv[])
{
    char atom_window[] = "Drawing 1 :Atom";
    char rook_window[] = "Drawing 2: Rook";

    Mat atom_image = Mat::zeros(w, w, CV_8UC3);
    Mat rook_image = Mat::zeros(w, w, CV_8UC3);


    MyEllipse(atom_image, 90);
    MyEllipse(atom_image, 0);
    MyEllipse(atom_image, 45);
    MyEllipse(atom_image, -45);
    MyFilledCircle(atom_image, Point(w / 2, w / 2));

    //
    MyPolygon(rook_image);

    //![rectangle]
    /// 2.b. Creating rectangles
    rectangle(rook_image,
        Point(0, 7 * w / 8),
        Point(w, w),
        Scalar(0, 255, 255),
        CV_FILLED,
        8);

    imshow(atom_window, atom_image);
    moveWindow(atom_window, 0, 200);
    imshow(rook_window, rook_image);
    moveWindow(rook_window, w, 200);


    waitKey();
    system("pause");
    return 0;
}

void MyEllipse(Mat img, double angle)
{
    int thickness = 2;
    int lineType = 8;

    ellipse(img, Point(w / 2, w / 2), Size(w / 4, w / 16), angle,
        0, 360, Scalar(255, 0, 0), thickness, lineType);
}

void MyFilledCircle(Mat img, Point center)
{
    circle(img, center, w / 32, Scalar(0, 0, 255), CV_FILLED, 8);
}

void MyPolygon(Mat img)
{
    int lineType = 8;

    /** Create some points */
    Point rook_points[1][20];
    rook_points[0][0] = Point(w / 4, 7 * w / 8);
    rook_points[0][1] = Point(3 * w / 4, 7 * w / 8);
    rook_points[0][2] = Point(3 * w / 4, 13 * w / 16);
    rook_points[0][3] = Point(11 * w / 16, 13 * w / 16);
    rook_points[0][4] = Point(19 * w / 32, 3 * w / 8);
    rook_points[0][5] = Point(3 * w / 4, 3 * w / 8);
    rook_points[0][6] = Point(3 * w / 4, w / 8);
    rook_points[0][7] = Point(26 * w / 40, w / 8);
    rook_points[0][8] = Point(26 * w / 40, w / 4);
    rook_points[0][9] = Point(22 * w / 40, w / 4);
    rook_points[0][10] = Point(22 * w / 40, w / 8);
    rook_points[0][11] = Point(18 * w / 40, w / 8);
    rook_points[0][12] = Point(18 * w / 40, w / 4);
    rook_points[0][13] = Point(14 * w / 40, w / 4);
    rook_points[0][14] = Point(14 * w / 40, w / 8);
    rook_points[0][15] = Point(w / 4, w / 8);
    rook_points[0][16] = Point(w / 4, 3 * w / 8);
    rook_points[0][17] = Point(13 * w / 32, 3 * w / 8);
    rook_points[0][18] = Point(5 * w / 16, 13 * w / 16);
    rook_points[0][19] = Point(w / 4, 13 * w / 16);

    const Point* ppt[1] = { rook_points[0] };
    int npt[] = { 20 };

    fillPoly(img,
        ppt,
        npt,
        1,
        Scalar(255, 255, 255),
        lineType);
}
void MyLine(Mat img, Point start, Point end)
{
    int thickness = 2;
    int lineType = 8;

    line(img,
        start,
        end,
        Scalar(0, 0, 0),
        thickness,
        lineType);
}