circle.cpp

//
//  Circle.cpp
//  Cathairs
//
//  Created by Ana Sofia Remis on 3/15/16.
//
//

#include "Circle.hpp"

void Circle:: setup(){
    
    posx = ofGetWidth()/2 ;
    
    posy = ofGetHeight()/2 ;
    
    lastradius = 5;
    
    newradius = lastradius++;
}

void Circle:: draw() {
    
    void ofApp:: drawCircle();
}

void Circle:: update(){
    
    lastradius++;
    newradius;
    
}

circle.hpp

//
//  Circle.hpp
//  Cathairs
//
//  Created by Ana Sofia Remis on 3/15/16.
//
//

#ifndef Circle_hpp
#define Circle_hpp

#include "ofMain.h"
#include <stdio.h>

#endif /* Circle_hpp */

class Circle {
 
public:
    void setup();

    void draw();
    
    void update();
    
    void drawCircle();
    
    int posx;
    int posy;
    int lastradius;
    int newradius; //new radius = lastradius-3 
};

circledrawer

#include "ofMain.h"
#include "ofApp.h"

//========================================================================
int main( ){
	ofSetupOpenGL(1084,768,OF_WINDOW);			// <-------- setup the GL context

	// this kicks off the running of my app
	// can be OF_WINDOW or OF_FULLSCREEN
	// pass in width and height too:
	ofRunApp(new ofApp());

}

ofApp.cpp

void ofApp::update(){
//hairs.update();
}

//--------------------------------------------------------------
void ofApp::draw(){
   // hairs.draw()
//    ofRect(45,45,45,45);
//    ofEllipse (55, 566, 60, 45);
//    ofLine(27.6, 67.5, 78.9, 467.9);
}
    void ofApp:: drawCircle() {
     //   ofEllipse();
        if(radius > 2) {
            radius *= 0.75f;
            drawCircle();
        }

}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){

}

//--------------------------------------------------------------
void ofApp::keyReleased(int key){

}

//--------------------------------------------------------------
void ofApp::mouseMoved(int x, int y ){

}

//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){

}

//--------------------------------------------------------------
void ofApp::mouseEntered(int x, int y){

}

//--------------------------------------------------------------
void ofApp::mouseExited(int x, int y){

}

//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){

}

//--------------------------------------------------------------
void ofApp::gotMessage(ofMessage msg){

}

//--------------------------------------------------------------
void ofApp::dragEvent(ofDragInfo dragInfo){ 

}

ofApp.h

#pragma once

#include "ofMain.h"
#include "Circle.hpp"

#define CAT
#define NCAT 10;




class ofApp : public ofBaseApp{

	public:
		void setup();
		void update();
		void draw();
        void drawCircle();

		void keyPressed(int key);
		void keyReleased(int key);
		void mouseMoved(int x, int y );
		void mouseDragged(int x, int y, int button);
		void mousePressed(int x, int y, int button);
		void mouseReleased(int x, int y, int button);
		void mouseEntered(int x, int y);
		void mouseExited(int x, int y);
		void windowResized(int w, int h);
		void dragEvent(ofDragInfo dragInfo);
		void gotMessage(ofMessage msg);
		
    int radius = 5;
    int x= mouseX;
    int y = mouseY;
    
   
    
   // vector <drawCircle > circle;
};