openFrameworksで画像を回す。そしてちゃんと笑い男する。

#include <ofMain.h>
#include <ofxCv.h>


class ofApp : public ofBaseApp {
private:
    ofVideoGrabber cam;
    ofxCv::ObjectFinder finder;
    ofImage face, ring;
    int count;

public:
    void setup() override {
        cam.setup(640, 480);

        finder.setup("haarcascade_frontalface_default.xml");
        finder.setPreset(ofxCv::ObjectFinder::Fast);

        face.loadImage("face.png");
        ring.loadImage("ring.png");
    }

    void update() override {
        cam.update();

        if(cam.isFrameNew()){
            finder.update(cam);
        }
    }

    void draw() override {
        cam.draw(0, 0);

        for(int i=0; i<finder.size(); i++){
            ofRectangle rect = finder.getObjectSmoothed(i);

            {
                ofPushMatrix();

                ofTranslate(rect.getCenter());

                rect.width *= 1.5;
                rect.height *= 1.5;

                {
                    ofPushMatrix();

                    ofRotate(-count/2);
                    ring.draw(-rect.width/2, -rect.height/2, rect.width, rect.height);

                    ofPopMatrix();
                }

                face.draw(-rect.width/2, -rect.height/2, rect.width, rect.height);

                ofPopMatrix();
            }
        }

        count++;
    }
};


int main() {
    ofSetupOpenGL(640, 480, OF_WINDOW);

    ofRunApp(new ofApp());
}