"atomic bomb" commit. Reorganized OpenCV directory structure

samples/cpp/contours2.cpp

@@ -0,0 +1,76 @@
+#include "cv.h"
+#include "highgui.h"
+#include <math.h>
+
+using namespace cv;
+
+const int w = 500;
+int levels = 3;
+
+vector<vector<Point> > contours;
+vector<Vec4i> hierarchy;
+
+void on_trackbar(int pos, void*)
+{
+	Mat cnt_img = Mat::zeros(w, w, CV_8UC3);
+    int _levels = levels - 3;
+    drawContours( cnt_img, contours, _levels <= 0 ? 3 : -1, Scalar(128,255,255),
+                  3, CV_AA, hierarchy, std::abs(_levels) );
+
+    imshow("contours", cnt_img);
+}
+
+int main( int argc, char** argv )
+{
+    Mat img = Mat::zeros(w, w, CV_8UC1);
+
+    for( int i = 0; i < 6; i++ )
+    {
+        int dx = (i%2)*250 - 30;
+        int dy = (i/2)*150;
+        const Scalar white = Scalar(255);
+        const Scalar black = Scalar(0);
+
+        if( i == 0 )
+        {
+            for( int j = 0; j <= 10; j++ )
+            {
+                double angle = (j+5)*CV_PI/21;
+                line(img, Point(cvRound(dx+100+j*10-80*cos(angle)),
+                    cvRound(dy+100-90*sin(angle))),
+                    Point(cvRound(dx+100+j*10-30*cos(angle)),
+                    cvRound(dy+100-30*sin(angle))), white, 1, 8, 0);
+            }
+        }
+
+        ellipse( img, Point(dx+150, dy+100), Size(100,70), 0, 0, 360, white, -1, 8, 0 );
+        ellipse( img, Point(dx+115, dy+70), Size(30,20), 0, 0, 360, black, -1, 8, 0 );
+        ellipse( img, Point(dx+185, dy+70), Size(30,20), 0, 0, 360, black, -1, 8, 0 );
+        ellipse( img, Point(dx+115, dy+70), Size(15,15), 0, 0, 360, white, -1, 8, 0 );
+        ellipse( img, Point(dx+185, dy+70), Size(15,15), 0, 0, 360, white, -1, 8, 0 );
+        ellipse( img, Point(dx+115, dy+70), Size(5,5), 0, 0, 360, black, -1, 8, 0 );
+        ellipse( img, Point(dx+185, dy+70), Size(5,5), 0, 0, 360, black, -1, 8, 0 );
+        ellipse( img, Point(dx+150, dy+100), Size(10,5), 0, 0, 360, black, -1, 8, 0 );
+        ellipse( img, Point(dx+150, dy+150), Size(40,10), 0, 0, 360, black, -1, 8, 0 );
+        ellipse( img, Point(dx+27, dy+100), Size(20,35), 0, 0, 360, white, -1, 8, 0 );
+        ellipse( img, Point(dx+273, dy+100), Size(20,35), 0, 0, 360, white, -1, 8, 0 );
+    }
+
+    namedWindow( "image", 1 );
+    imshow( "image", img );
+
+    vector<vector<Point> > contours0;
+    findContours( img, contours0, hierarchy, RETR_TREE, CHAIN_APPROX_SIMPLE);
+
+    contours.resize(contours0.size());
+    for( size_t k = 0; k < contours0.size(); k++ )
+        approxPolyDP(Mat(contours0[k]), contours[k], 3, true);
+
+    namedWindow( "contours", 1 );
+    createTrackbar( "levels+3", "contours", &levels, 7, on_trackbar );
+
+    on_trackbar(0,0);
+    waitKey();
+
+    return 0;
+}