[p5osc] how to make things happens?

milc

[p5osc] how to make things happens?

in Contributed Library Questions • 3 years ago

hello,

I'm sending osc messages from supercollider to p5 using p5osc lib.
it receives messages and show it in the post window.
but, well, I just can't find a way to use those messages to do something in my p5 program.
I've tried to trigger a text display each time p5 receives an osc message.
but it becomes more and more confusing.
it does not do anything or triggers the display time to time, very shortly.
can someone please help me??

thank you very much.

import processing.video.*;
import oscP5.*;
import netP5.*;
PFont fontA;
Capture cam;
OscP5 oscP5;
NetAddress myRemoteLocation;
void setup() {
size(640,480);
cam = new Capture(this, 640, 480);
frameRate(25);
oscP5 = new OscP5(this,12000);
myRemoteLocation = new NetAddress("127.0.0.1",12000);
fontA = loadFont("Arial-Black-48.vlw");
textFont(fontA, 48);
}
void draw(){
if (cam.available() == true){
cam.read();
image(cam, 0, 0);
}
};
void oscEvent(OscMessage theOscMessage) {
float flik = theOscMessage.get(0).floatValue();
println(flik);
if(flik > 0){
background(0);
fill(255);
text("heyho", 200, 200);
}
}

Replies(7)

milc

Re: [p5osc] how to make things happens?

3 years ago

thanks for the replies.

andreas.s..

Re: [p5osc] how to make things happens?

3 years ago

hi,

osc messages are received by processing asynchronously, meaning messages when received are not in sync with your draw loop, therefore the flickering - depending on what is called first, the drawing of your image (inside draw() ) or the drawing text (inside oscEvent() ).

depending on what your intention is when receiving an osc message, i recommend to handle any drawing functions (currently located inside oscEvent) from within your draw function. this requires you to e.g. add a condition to your draw function. whenever you receive an osc message, the osc arguments and values you are interested in should be used to set and change local variables which will then be used for any changes within your program accordingly.

// local variable, to be changed when an osc message is received
float myLocalFlik = 0;
void draw() {
if (cam.available() == true){
cam.read();
image(cam, 0, 0);
}
if(myLocalFlik>0) {
background(0);
fill(255);
text("heyho", 200, 200);
}
}
void oscEvent(OscMessage theOscMessage) {
myLocalFlik = theOscMessage.get(0).floatValue();
}

andreas schlegel, http://www.sojamo.de

tabbed

Re: Re: [p5osc] how to make things happens?

2 years ago

Hi Andreas, I have a question and thought I'd go straight to the source as you know most about this subject. Are there limitations as to how many or how large the messages can be when sent via osc (eg. 100 string messages, repeating 30 times a second)? Will any data get lost on the way?

My example: I generate simple text files with string values on my android phone for later use. Their could be hundreds of thousands of values, so filesize is variable. I process the file and now want to send the values in small size chunks via osc to a desktop application.

Cheers.

bblochl

Re: [p5osc] how to make things happens?

3 years ago

To give you an reply:

All people love your code! You are a great artist!

Especially the lines

import oscP5.*;
import netP5.*;

are magnificant!!!!

bblochl

Re: [p5osc] how to make things happens?

3 years ago

At least I found the Arduino Forum and understand now, that ocsP5 and netP5 are Arduino stuff.

andreas.s..

Re: Re: [p5osc] how to make things happens?

3 years ago

At least I found the Arduino Forum and understand now, that ocsP5 and netP5 are Arduino stuff.

hm, that would be a misunderstanding. oscP5 and netP5 are java based processing libraries which allow you to send OSC messages across a network connection using the OSC protocol (via oscP5) over an Internet Protocol (TCP, UDP or multicast via netP5). you can establish an OSC communication amongst various applications running on the same or other machines (connected via a network).

andreas schlegel, http://www.sojamo.de

milc

Re: [p5osc] how to make things happens?

3 years ago

thanks for the replies.
it makes sense and helped me understand much better how it works.
thank you.

by the way, I don't really understand why import libraries must be the reason why I am loved by all people...
I use oscP5 for communication between supercollider and p5, nothing to do with Arduino, and as far as I know,
it's the only lib available for OSC communication. (beside p5 supercollider lib, which is more like sc client lib for p5.)
netP5 lib is necessary for me as supercollider server and p5 communicate through UDP connection.
so....???
thanks for loving my code anyway.