vector of ofxBox2d Circles

gistfile1.txt

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
    
    // first init box2d
    box2d.init();
    
    // set the gravity
    box2d.setGravity(0, 10);
    
    // create bounds x,y,w,h
    box2d.createBounds();

    // enable mouse grabbing
    box2d.registerGrabbing();
    
}

//--------------------------------------------------------------
void ofApp::update() {
    
    if (ofGetFrameNum() % 30) {
        
        // make a shared circle
        auto circle = make_shared<ofxBox2dCircle>();
        
        // set the physics of the circle
        circle->setPhysics(1, 0.7, 0.7);
        
        // set the position and size of circle then add to the world
        circle->setup(box2d.getWorld(), ofGetWidth()/2 + ofRandom(-10, 10), ofGetHeight()/2 + ofRandom(-10, 10), 10);
        
        // add to the vector
        circles.push_back(circle);
        
    }
    
    // update every frame
    box2d.update();
}

//--------------------------------------------------------------
void ofApp::draw() {
    for(auto &circle : circles) {
        circle->draw();
    }
}