Error when I want to receive an OSC message

sara1111

Error when I want to receive an OSC message

in Contributed Library Questions • 2 years ago

Hello!

I have a small problem when I send OSC messages from one PC to another.

Here is the error:

ERROR @ ERROR OscP5. An error occurred while forwarding OscMessage year
  to a method in your program. please check your code for Any
That Might Occur as possible errors in the Where method incoming
  OscMessages are parsed eg check for casting errors, possible
  nullpointers, array overflows ... .
method in charge: java.lang.reflect.InvocationTargetException oscEvent

Here are the piece of code that I think is a problem:

void oscEvent (OscMessage theOscMessage) {
   delay (500);

   float x = theOscMessage.get (0). floatValue () / / get the first argument osc
   theOscMessage.get float v = (1). floatValue () / / get the second argument osc

   x = Float.valueOf (theOscMessage.addrPattern ());
   v = Float.valueOf (theOscMessage.addrPattern ());

}

Thank you for your help

Replies(4)

andreas.s..

Re: ERROR WHEN I WANT TO RECEIVE AN OSC MESSAGE

2 years ago

void oscEvent (OscMessage theOscMessage) {
delay (500);
float x = theOscMessage.get (0). floatValue () / / get the first argument osc
theOscMessage.get float v = (1). floatValue () / / get the second argument osc
x = Float.valueOf (theOscMessage.addrPattern ());
v = Float.valueOf (theOscMessage.addrPattern ());
}

line 4 looks odd.

theOscMessage.addrPattern() returns a string. your code tries to convert this tring to a float but this can result in a NumberFormatException (float x= Float.valueOf("hello"); will throw a NumberFormatException for example). To avoid this exception to be thrown, wrap line 5 and 6 with

try {} catch(NumberFormatException e) {}

a safer way to get a number (int or float) from a string you should use processing's int() or float() functions. but, except you know your addrPattern is definitely a number wrapped in a string, i would remove line 5 and 6.

to play safe, try:

float x,y;
void oscEvent (OscMessage theOscMessage) {
delay (500);
if(theOscMessage.typetag().startsWith("ff")) {
x = theOscMessage.get(0).floatValue();
y = theOscMessage.get(1).floatValue();
println("received: "+x+","+y);
}
}

sara1111

Re: ERROR WHEN I WANT TO RECEIVE AN OSC MESSAGE

2 years ago

Thank you for your response but I have another problem.

I have a database where few values are unknown and I have put "a'' when it is the case.

So this is probably the problem!?and what can I do ?

I have another problem.It is that my program don't recover each value.It takes only the first argument.

Though I have put this code:

void oscEvent(OscMessage theOscMessage) {

if(theOscMessage.typetag().startsWith("ff")) {

x = theOscMessage.get(0).floatValue();

y = theOscMessage.get(1).floatValue();

}

x=Float.valueOf(theOscMessage.addrPattern());

y=Float.valueOf(theOscMessage.addrPattern());

}

Thank you

sara

andreas.s..

Re: ERROR WHEN I WANT TO RECEIVE AN OSC MESSAGE

2 years ago

hm, not sure if your code makes sense to me.

an osc message consists of 3 elements, an address pattern, a typetag and an list of arguments (the values). an example osc message:

/test 10

here, /test is the address pattern and 10 is the value. the typetag describes the format of each item in your list of arguments, so for this example the typetag is i (stands for int)

when a message is received, you have access to these 3 osc message elements with

theOscMessage.addrPattern() returns a string

theOscMessage.typetag() returns a string

theOscMessage.get(n) returns an OscArgument, n is an integer and represents the index of the arguments array

so if you know what osc message to expect from your sender, extracting the value(s) you are looking for should be straight forward? maybe you post the osc message you are receiving?

PhiLho

Re: ERROR WHEN I WANT TO RECEIVE AN OSC MESSAGE

2 years ago

Problem 1: don't shout! no subject line in all caps (I fix that).
Problem 2: please, read the forum descriptions. This has nothing to do in Processing Implementations. (I fix that too)