send a float number using a udp connection

extend
#1

i’m stuck here.
i want to send a float number via udp connection. but the class says it needs char data.

how do i change this float to string and then to char data?
i’ve tried ofToString and as the name says it converts to string. :slight_smile:

thanks,
alp

ps: im using ofxUDPManager

#2

(moved to extend since it relates to addons… - zach )

#3

does this not work?

  
  
ofxOscMessage m;  
m.setAddress( "/test" );  
m.addFloatArg( ofGetElapsedTimef() );  
sender.sendMessage( m );

that’s (trimmed down) from the example code - it sends a float when you hit the letter “a” – just the elapsed time in seconds. if you run the serd/recv examples you can see it in action by hitting “a” on the send example… take a look in keypressed() for how it’s done.

take care!!
zach

#4

If you want to use the ofxUDPManager you can do something like.

  
char tmp[32];  
memset(tmp, 0, 32);  
  
sprintf(tmp, "%f", yourFloatValue);  
udp.send( tmp, strlen(tmp) );

I think that should work.

theo

#5

director receives OSC data as #bundle, and i don’t know how to encode that, and i don’t want to waste my cpu cycles in director encoding OSC packet data.
instead i’ve used:

in testApp.h

  
          
ofxUDPManager udpmanager;

in testApp.cpp::setup()

  
      
udpmanager.Create();  
udpmanager.Connect("127.0.0.1",1267);

in testApp.cpp::draw()

  
  
string newstring = ofToString(overall.x);  
char *buf = new char[128];  
  
for(size_t i = 0; i < newstring.size(); i++)  
{  
   buf[i] = newstring[i];  
}  
  
udpmanager.Send(buf,128);  
//...When you are done with buf...  
delete []buf;
#6

and yes, theo’s code also works. I’m not a hardcore c++ programmer, so i don’t know which one executes faster.