Drawing basic image

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This link: https://blog.csdn.net/qq_39504764/article/details/100554521

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace cv;

#define WINDOW_NAME1 "pic1"        //为窗口标题定义的宏
#define WINDOW_NAME2 "pic2"        //为窗口标题定义的宏
#define WINDOW_WIDTH 600//定义窗口大小的宏


void DrawEllipse( Mat img, double angle );//绘制椭圆
void DrawFilledCircle( Mat img, Point center );//绘制圆
void DrawPolygon( Mat img );//绘制多边形
void DrawLine( Mat img, Point start, Point end );//绘制线段

int main( void )
{
    
    // 创建空白的Mat图像
    Mat atomImage = Mat::zeros( WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3 );
    Mat rookImage = Mat::zeros( WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3 );
    
   
    // ---------------------<1>绘制化学中的原子示例图------------------------
    
    //【1.1】先绘制出椭圆
    DrawEllipse( atomImage, 90 );
    DrawEllipse( atomImage, 0 );
    DrawEllipse( atomImage, 45 );
    DrawEllipse( atomImage, -45 );
    
    //【1.2】再绘制圆心
    DrawFilledCircle( atomImage, Point( WINDOW_WIDTH/2, WINDOW_WIDTH/2) );
    
    // ----------------------------<2>绘制组合图-----------------------------
    //【2.1】先绘制出椭圆
    DrawPolygon( rookImage );
    
    // 【2.2】绘制矩形
    rectangle( rookImage,
              Point( 0, 7*WINDOW_WIDTH/8 ),
              Point( WINDOW_WIDTH, WINDOW_WIDTH),
              Scalar( 0, 255, 255 ),
              -1,
              8 );
    
    // 【2.3】绘制一些线段
    DrawLine( rookImage, Point( 0, 15*WINDOW_WIDTH/16 ), Point( WINDOW_WIDTH, 15*WINDOW_WIDTH/16 ) );
    DrawLine( rookImage, Point( WINDOW_WIDTH/4, 7*WINDOW_WIDTH/8 ), Point( WINDOW_WIDTH/4, WINDOW_WIDTH ) );
    DrawLine( rookImage, Point( WINDOW_WIDTH/2, 7*WINDOW_WIDTH/8 ), Point( WINDOW_WIDTH/2, WINDOW_WIDTH ) );
    DrawLine( rookImage, Point( 3*WINDOW_WIDTH/4, 7*WINDOW_WIDTH/8 ), Point( 3*WINDOW_WIDTH/4, WINDOW_WIDTH ) );
    
    // ---------------------------<3>显示绘制出的图像------------------------
    imshow( WINDOW_NAME1, atomImage );
    moveWindow( WINDOW_NAME1, 0, 200 );
    imshow( WINDOW_NAME2, rookImage );
    moveWindow( WINDOW_NAME2, WINDOW_WIDTH, 200 );
    
    waitKey( 0 );
    return(0);
}



//-------------------------------【DrawEllipse( )函数】--------------------------------
//        描述：自定义的绘制函数，实现了绘制不同角度、相同尺寸的椭圆
//-----------------------------------------------------------------------------------------
void DrawEllipse( Mat img, double angle )
{
    int thickness = 2;
    int lineType = 8;
    
    ellipse( img,
            Point( WINDOW_WIDTH/2, WINDOW_WIDTH/2 ),
            Size( WINDOW_WIDTH/4, WINDOW_WIDTH/16 ),
            angle,
            0,
            360,
            Scalar( 255, 129, 0 ),
            thickness,
            lineType );
}


//-----------------------------------【DrawFilledCircle( )函数】---------------------------
//        描述：自定义的绘制函数，实现了实心圆的绘制
//-----------------------------------------------------------------------------------------
void DrawFilledCircle( Mat img, Point center )
{
    int thickness = -1;
    int lineType = 8;
    
    circle( img,
           center,
           WINDOW_WIDTH/32,
           Scalar( 0, 0, 255 ),
           thickness,
           lineType );
}


//-----------------------------------【DrawPolygon( )函数】--------------------------
//        描述：自定义的绘制函数，实现了凹多边形的绘制
//--------------------------------------------------------------------------------------
void DrawPolygon( Mat img )
{
    int lineType = 8;
    
    //创建一些点
    Point rookPoints[1][20];
    rookPoints[0][0]  = Point(    WINDOW_WIDTH/4,   7*WINDOW_WIDTH/8 );
    rookPoints[0][1]  = Point(  3*WINDOW_WIDTH/4,   7*WINDOW_WIDTH/8 );
    rookPoints[0][2]  = Point(  3*WINDOW_WIDTH/4,  13*WINDOW_WIDTH/16 );
    rookPoints[0][3]  = Point( 11*WINDOW_WIDTH/16, 13*WINDOW_WIDTH/16 );
    rookPoints[0][4]  = Point( 19*WINDOW_WIDTH/32,  3*WINDOW_WIDTH/8 );
    rookPoints[0][5]  = Point(  3*WINDOW_WIDTH/4,   3*WINDOW_WIDTH/8 );
    rookPoints[0][6]  = Point(  3*WINDOW_WIDTH/4,     WINDOW_WIDTH/8 );
    rookPoints[0][7]  = Point( 26*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
    rookPoints[0][8]  = Point( 26*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
    rookPoints[0][9]  = Point( 22*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
    rookPoints[0][10] = Point( 22*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
    rookPoints[0][11] = Point( 18*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
    rookPoints[0][12] = Point( 18*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
    rookPoints[0][13] = Point( 14*WINDOW_WIDTH/40,    WINDOW_WIDTH/4 );
    rookPoints[0][14] = Point( 14*WINDOW_WIDTH/40,    WINDOW_WIDTH/8 );
    rookPoints[0][15] = Point(    WINDOW_WIDTH/4,     WINDOW_WIDTH/8 );
    rookPoints[0][16] = Point(    WINDOW_WIDTH/4,   3*WINDOW_WIDTH/8 );
    rookPoints[0][17] = Point( 13*WINDOW_WIDTH/32,  3*WINDOW_WIDTH/8 );
    rookPoints[0][18] = Point(  5*WINDOW_WIDTH/16, 13*WINDOW_WIDTH/16 );
    rookPoints[0][19] = Point(    WINDOW_WIDTH/4,  13*WINDOW_WIDTH/16 );
    
    const Point* ppt[1] = { rookPoints[0] };
    int npt[] = { 20 };
    
    fillPoly( img,
             ppt,
             npt,
             1,
             Scalar( 255, 255, 255 ),
             lineType );
}


//-----------------------------------【DrawLine( )函数】--------------------------
//        描述：自定义的绘制函数，实现了线的绘制
//---------------------------------------------------------------------------------
void DrawLine( Mat img, Point start, Point end )
{
    int thickness = 2;
    int lineType = 8;
    line( img,
         start,
         end,
         Scalar( 0, 0, 0 ),
         thickness,
         lineType );
}