• Follow the tutorial until have OpenFrameworks and Addons in your projects.

You only need to add OpenFrameworks and Addons projects as references in your new project.

• To add an addon after having created the project you just need to include its name in the addons.make file.

Crear un listener de UDP:

ofxUDPManager udpConnection;
 
udpConnection.Create();
udpConnection.Bind(5001);
udpConnection.SetNonBlocking(true);
 
char udpMessage[10000];
udpConnection.Receive(udpMessage,10000);
std::string message=udpMessage;

• https://github.com/jefftimesten/ofxJSON

ofxJSONElement result;
std::string url = "http://127.0.0.1:5000/sketch/1";
bool parsingSuccessful = result.open(url);
 
if (parsingSuccessful)
{
	//ofLogNotice("ofApp::setup") << "Ok!" << endl << result.getRawString() << endl;
	Json::Int64 value = result["paths"][0]["start_t"].asInt64();
	ofLogNotice("ofApp::setup") << value << endl;
	Json::ArrayIndex npoints = result["paths"][0]["points"].size();
	ofLogNotice("ofApp::setup") << npoints << endl;
 
	for (unsinged int i=0; i<result["paths"][0]["points"].size(); i++)
		ofxJSONElement point = result["paths"][0]["points"][i];
 
	ofxJSONElement result2;
	ofLogNotice("ofApp::setup") << result2.parse("{\"hola\": \"adios\"}");
	ofLogNotice("ofApp::setup") << result2["hola"].asString();
}
else
{
	ofLogNotice("ofApp::setup")  << "Failed to parse JSON" << endl;
}

• Create image from code (color picker)

float w = ofGetWidth();
float h = ofGetHeight();
float cx = w/2;
float cy = h/2;
 
img.allocate(w,h,OF_IMAGE_COLOR);
 
for (float y=0; y<h; y++) {
    for (float x=0; x<w; x++) {
 
        float angle = atan2(y-cy,x-cy)+PI;
        float dist = ofDist(x,y,cx,cy);
        float hue = angle/TWO_PI*255;
        float sat = ofMap(dist,0,w/4,0,255,true);
        float bri = ofMap(dist,w/4,w/2,255,0,true);
 
        img.setColor(x,y,ofColor::fromHsb(hue,sat,bri));
    }
}
 
img.reloadTexture();