Opencv用鼠标画圆

#include<iostream>#include<opencv2/opencv.hpp>#define WINDOW_NAME "鼠标事件窗口"#define EVENT_WINDOW "滚动条窗口"#define PI 3.1415926using namespace std;using namespace cv;void DrawCircle(Mat &img, Point center, int radius, Scalar color, int thickness = 2, int lineType = 8);void DrawRectangle(Mat &img, Rect box);void onMouse(int event, int x, int y, int flag, void *param);void on_Trackbar_b(int, void *);void on_Trackbar_g(int, void *);void on_Trackbar_r(int, void *);void on_Trackbar_switch(int, void *);void on_Trackbar_proportion(int, void *);void on_Trackbar_Thick(int, void *);Rect g_rectangle;bool g_bDrawingBox = false;RNG g_rng(12345);Point g_startpoint;double g_angle;Point g_currentPoint;int g_CurRadius;Scalar g_EllCurColor;double proportion = 0;int EllCurThick;//滑动条int g_nAlphaValueSlider_b, g_nAlphaValueSlider_g, g_nAlphaValueSlider_r, g_nAlphaValueSlider_switch, g_nAlphaValueSlider_pro,g_EllCurThick;const int g_nMaxAlphaValue = 255, g_switch = 1, g_proportion_max = 11, g_EllCurThickMax = 100;int switch_flag = 0;int main(){Mat srcImage(600, 800, CV_8UC3);Mat winImage(100, 600, CV_8UC3);Mat tempImage;srcImage = Scalar::all(0);winImage = Scalar::all(0);srcImage.copyTo(tempImage);/*namedWindow(WINDOW_NAME);setMouseCallback(WINDOW_NAME, onMouse, (void *)&srcImage);onMouse(0, 0, 0, 0, 0);*/g_nAlphaValueSlider_b = 50;g_nAlphaValueSlider_g = 50;g_nAlphaValueSlider_r = 50;g_nAlphaValueSlider_switch = 0;g_nAlphaValueSlider_pro = 0;namedWindow(EVENT_WINDOW);imshow(EVENT_WINDOW, winImage);createTrackbar("blue", EVENT_WINDOW, &g_nAlphaValueSlider_b, g_nMaxAlphaValue, on_Trackbar_b);on_Trackbar_b(g_nAlphaValueSlider_b, 0);createTrackbar("green", EVENT_WINDOW, &g_nAlphaValueSlider_g, g_nMaxAlphaValue, on_Trackbar_g);on_Trackbar_g(g_nAlphaValueSlider_g, 0);createTrackbar("red", EVENT_WINDOW, &g_nAlphaValueSlider_r, g_nMaxAlphaValue, on_Trackbar_r);on_Trackbar_r(g_nAlphaValueSlider_r, 0);createTrackbar("Thick", EVENT_WINDOW, &g_EllCurThick, g_EllCurThickMax, on_Trackbar_Thick);on_Trackbar_switch(g_EllCurThick, 0);createTrackbar("proportion", EVENT_WINDOW, &g_nAlphaValueSlider_pro, g_proportion_max, on_Trackbar_proportion);on_Trackbar_switch(g_nAlphaValueSlider_pro, 0);createTrackbar("switch", EVENT_WINDOW, &g_nAlphaValueSlider_switch, g_switch, on_Trackbar_switch);on_Trackbar_switch(g_nAlphaValueSlider_switch, 0);while (1){if (switch_flag){namedWindow(WINDOW_NAME);setMouseCallback(WINDOW_NAME, onMouse, (void *)&srcImage);while (1){srcImage.copyTo(tempImage);if (g_bDrawingBox)DrawCircle(tempImage, g_startpoint, g_CurRadius, g_EllCurColor, EllCurThick);imshow(EVENT_WINDOW, winImage);imshow(WINDOW_NAME, tempImage);if (!switch_flag)break;if (waitKey(10) == 27)break;}}if (waitKey(10) == 27)break;}return 0;}void DrawCircle(Mat &img, Point center, int radius, Scalar color, int thickness, int lineType){circle(img, center, radius, color, thickness, lineType);}void DrawRectangle(Mat &img, Rect box){rectangle(img, box.tl(), box.br(), Scalar(g_rng.uniform(0, 255), g_rng.uniform(0, 255), g_rng.uniform(0, 255)));}void onMouse(int event, int x, int y, int flag, void *param){Mat &img = *(cv::Mat*)param;switch (event){//移动鼠标的时候case CV_EVENT_MOUSEMOVE:{   if (g_bDrawingBox)   {   g_currentPoint = Point(x, y);   g_CurRadius = (int)pow((g_startpoint.x - g_currentPoint.x) *   (g_startpoint.x - g_currentPoint.x) + (g_startpoint.y - g_currentPoint.y) *   (g_startpoint.y - g_currentPoint.y), 0.5);   }}break;//点击鼠标左键时case CV_EVENT_LBUTTONDOWN:{ g_CurRadius = 0; g_bDrawingBox = true; g_startpoint = Point(x, y);}break;//松开鼠标左键时case CV_EVENT_LBUTTONUP:{   g_bDrawingBox = false;   DrawCircle(img, g_startpoint, g_CurRadius, g_EllCurColor, EllCurThick);}break;}}void on_Trackbar_b(int, void *){g_EllCurColor = Scalar(g_nAlphaValueSlider_b, g_nAlphaValueSlider_g, g_nAlphaValueSlider_r);}void on_Trackbar_g(int, void *){g_EllCurColor = Scalar(g_nAlphaValueSlider_b, g_nAlphaValueSlider_g, g_nAlphaValueSlider_r);}void on_Trackbar_r(int, void *){g_EllCurColor = Scalar(g_nAlphaValueSlider_b, g_nAlphaValueSlider_g, g_nAlphaValueSlider_r);}void on_Trackbar_switch(int, void *){switch_flag = g_nAlphaValueSlider_switch;}void on_Trackbar_proportion(int, void *){proportion = g_nAlphaValueSlider_pro;}void on_Trackbar_Thick(int, void *){EllCurThick = g_EllCurThick;}