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opencv 基本绘图

//--------------------------------------【程序说明】-------------------------------------------
//		程序说明：《OpenCV3编程入门》OpenCV3版书本配套示例程序20
//		程序描述：使用OpenCV进行基本的绘图操作
//		开发测试所用操作系统： Windows 7 64bit
//		开发测试所用IDE版本：Visual Studio 2010
//		开发测试所用OpenCV版本：	3.0 beta
//		2014年11月 Created by @浅墨_毛星云
//		2014年12月 Revised by @浅墨_毛星云
//------------------------------------------------------------------------------------------------


//---------------------------------【头文件、命名空间包含部分】----------------------------
//          描述：包含程序所使用的头文件和命名空间
//------------------------------------------------------------------------------------------------
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace cv;

//此程序对于OpenCV3版需要额外包含头文件：
#include <opencv2/imgproc/imgproc.hpp>



//-----------------------------------【宏定义部分】-------------------------------------------- 
//		描述：定义一些辅助宏 
//------------------------------------------------------------------------------------------------ 
#define WINDOW_NAME1 "draw_img1"        //为窗口标题定义的宏 
#define WINDOW_NAME2 "draw_img2"        //为窗口标题定义的宏 
#define WINDOW_WIDTH 600//定义窗口大小的宏



//--------------------------------【全局函数声明部分】-------------------------------------
//		描述：全局函数声明
//-----------------------------------------------------------------------------------------------
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



//-----------------------------------【ShowHelpText( )函数】----------------------------------
//          描述：输出一些帮助信息
//----------------------------------------------------------------------------------------------
void ShowHelpText()
{
    //输出欢迎信息和OpenCV版本
    printf("\n\n\t\t\t非常感谢购买《OpenCV3编程入门》一书！\n");
    printf("\n\n\t\t\t此为本书OpenCV3版的第20个配套示例程序\n");
    printf("\n\n\t\t\t   当前使用的OpenCV版本为：" CV_VERSION);
    printf("\n\n  ----------------------------------------------------------------------------\n");
}




//---------------------------------------【main( )函数】--------------------------------------
//		描述：控制台应用程序的入口函数，我们的程序从这里开始执行
//-----------------------------------------------------------------------------------------------
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);

    ShowHelpText();
    // ---------------------<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);
}