Processing Forum

how do I check if a Client has connected

[3 Replies]
- 21-Jun-2011 04:36 PM
- Forum: Core Library Questions
This did not work:
C = null;
C = new Client ( this, "0.0.0.0", 5402 );
if( C == null ) println( "Client failed" );

Any time I reference C.anything, I get java.lang.NullPointerException

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

network write returns void, should return int.

[1 Reply]
- 16-Jun-2011 04:59 PM
- Forum: Core Library Questions
According to this:

http://www.processing.org/reference/libraries/net/Client_write_.html

client.write() should return an int. If you try ' int N = Client.write(Line)' he
complains that write returns a void. I have verified thid by looking at the source.
Returning an int is the only way that you can see if the write has completed
correctly.

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

changing editor cursor.

[1 Reply]
- 16-Jun-2011 04:53 PM
- Forum: Integration and Hardware
OK guys, I somehow managed to changed the colors in the editor ( don't ask me how ).
Now I can't see the cursor. Is there so way I can either change the color and/or shape.

Thanks for your time.

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

not fond of this java

[6 Replies]
- 15-Jun-2011 12:40 PM
- Forum: Integration and Hardware
OK guys, trying to get ride of the 'not fond of this java' message.

I have installed the lastest 64 bit java from sun.

/usr/java/jdk1.6.0_26/bin/java -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Server VM (build 20.1-b02, mixed mode)

Replaced the java folder with a sym link to:

mv java old.java
ln -s /usr/java/jdk1.6.0_26/ java
java/bin/java -version
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Server VM (build 20.1-b02, mixed mode)

Start processing:

processing
APPDIR=/src/Processing/processing-1.5
DIR=/usr/java/..
L=rt.jar
LIB=/usr/java/../java/jdk1.6.0_26/jre/lib/rt.jar
L=tools.jar
LIB=/usr/java/../java/jdk1.6.0_26/lib/tools.jar
JDKCP=/usr/java/../java/jdk1.6.0_26/jre/lib/rt.jar:/usr/java/../java/jdk1.6.0_26/lib/tools.jar
SUCCESS=1
CLASSPATH=/usr/java/../java/jdk1.6.0_26/jre/lib/rt.jar:/usr/java/../java/jdk1.6.0_26/lib/tools.jar:/src/Processing/processing-1.5/lib/ant.jar:/src/Processing/processing-1.5/lib/ant-launcher.jar:/src/Processing/processing-1.5/lib/antlr.jar:/src/Processing/processing-1.5/lib/core.jar:/src/Processing/processing-1.5/lib/ecj.jar:/src/Processing/processing-1.5/lib/jna.jar:/src/Processing/processing-1.5/lib/pde.jar
PATH=/usr/java/../bin:.:/home/wre00/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/sbin:/sbin

But still get message?

Any ideas?

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

Is it possiable to exit a sketch and leave the graphic up?

[5 Replies]
- 14-Jun-2011 08:15 AM
- Forum: Programming Questions
If so, how?

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

BUILD FAILED

[1 Reply]
- 13-Jun-2011 03:08 PM
- Forum: Integration and Hardware
Downloaded "svn checkout http://processing.googlecode.com/svn/trunk/ processing-read-only"

Read http://code.oogle.com/p/processing/wiki/BuildInstructions
Did:

ant clean
ant run

Got this error:

BUILD FAILED
/src/Processing/processing-read-only/processing/build/build.xml:32: The following error occurred while executing this line:
/src/Processing/processing-read-only/processing/build/build.xml:455: The following error occurred while executing this line:
/src/Processing/processing-read-only/processing/build/build.xml:164: android-core.zip was not built, but is required for dist. Install the Android tools, set ANDROID_SDK, and try again.

OK where is the ANDROID_SDK?

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

How do I rebuild 'processing'?

[1 Reply]
- 13-Jun-2011 01:12 PM
- Forum: Integration and Hardware
Hi group,

I wish to add some calls to the Network Server Class. I have downloaded the current source but I am unfamiliar
with the process to rebuild process. It there a URL that could provide this village Idiot with help??

Thanks for your time.

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

readStringUntil() is missing from Server Class.

[3 Replies]
- 12-Jun-2011 06:27 PM
- Forum: Core Library Questions
There seam to be many missing functions missing from the Server Classes?

How can add these missing functions??

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

how to get line number for error message

[3 Replies]
- 12-Jun-2011 03:40 PM
- Forum: Integration and Hardware
OK, guys,

I get an error message"

Exception in thread "Animation Thread" java.lang.ArrayIndexOutOfBoundsException: 1
    at TTY_Plot_2.draw(TTY_Plot_2.java:80)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:636)

How can I see which line is TTY_Plot_2.java:80?

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

clientEvent called continuesly

[4 Replies]
- 11-Jun-2011 12:19 PM
- Forum: Core Library Questions
Hi group,

I have a set of scripts that communicate via the network. Which works with one small problem. The clientEvent routine is called even if no data has been sent. It is my understanding that it is only to be called when there is data to read?
I'm sure it is the way I have it written?
1. import processing.net.*;
  Client C;
  String data;
  int[] P = new int[2];
  
  void setup() {
  size(500,500);
  smooth();
  background( 255 );
  C = new Client( this, "127.0.0.1", 5204 );
  P[1] = 45; }
  
  void draw() {
  fill( P[1] % 255, 0, 0 );
  translate( 250,250);
  rotate( P[1] % 360 );
  rect( 45, 45, 55, 55 ); }
  
  void clientEvent( Client C ) {
  println("Event");
  int Yes;
  while( ( Yes = C.available() ) != 0 ) {
      println("read: " + Yes);
      data = C.readStringUntil( '\n' );
      P = int( splitTokens( data, " \n" ) );
  }
  }
1. import processing.net.*;
  Server S; float Old; float Now;
  void setup() {
  S = new Server( this, 5204); }
  void draw() {
  Now = millis();
  int Time = int( ( Now - Old ) /100 );
  int B = int( random( 0, 360 ) );
  String Line = Time + " " + B + "\n";
  if( true ) { S.write( Line ); }
  else { print(Line); }
  delay(1000);
  Old = Now;
  }
And what I get is:
1. read: 6Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  Event
  . . . .
Any ideas??

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

Array[0] causes NullPointerException

[2 Replies]
- 10-Jun-2011 02:03 PM
- Forum: Core Library Questions
Hi group,

I have a script that has many problems: The first one is:

Exception in thread "Animation Thread" java.lang.NullPointerException
   at I2C_Plot.setup(I2C_Plot.java:33)
   at processing.core.PApplet.handleDraw(Unknown Source)
   at processing.core.PApplet.run(Unknown Source)
   at java.lang.Thread.run(Thread.java:636)

This is caused by this line "Old[0] = 0;".

The next problem is the clientEvent is being called all the time. It is only to be called when there is data from the Server.

Here is the script:

import processing.net.*;

Client C;
String data;
int X = 1;
int[] Old;
int[] Now;

void setup() {
size(600,200); smooth(); background( 0 );
C = new Client( this, "127.0.0.1", 5204 );
Old[0] = 0;
}

void draw() { }

void clientEvent( Client C ) {
println("Event"); int Yes;
while( ( Yes = C.available() ) > 0 ) {
    println("read: " + Yes);
    data = C.readStringUntil( '\n' );
    print(data);
    Now = int( splitTokens( data, " \n" ) );
    println(data);
    if( Now[0] != Old[0] ) { line( X, 10, X, 20 ); }
    point( X, 10 + ( Now[0] * 10 ) );
    Old[0] = Now[0];
    if( ++X > 600 ) X = 1;
}
}

Any ideas? Thanks for your time.

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

programmer's reference guide?

[2 Replies]
- 09-Jun-2011 03:56 PM
- Forum: General Discussion
Hi group,

Is there a 'programmer's reference guide' for processing?? Something that has the command syntax for every call?

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

wait for new data from network

[1 Reply]
- 09-Jun-2011 01:16 PM
- Forum: Core Library Questions
Hi group,

New to Processing. Need help with network sketch. I want to plot data coming in from an external source.
So I am using the Network calls. My question is how can I stop looping until new data comes in? can I use the same calls that are used with the serial port and wait for a newline?

William Estrada
Mt Umunhum, CA, USA
HTTP://64.124.13.3 ( Mt-Umunhum-Wireless.net )
Skype: MrUmunhum

how to use a pipe to pass data from another program?

[1 Reply]
- 09-Jun-2011 09:34 AM
- Forum: Integration and Hardware
Hi group,
I want to have a program that generates plot data to give it to my processing plot program. Normally in Linux I would use 'fork exec'. How is this done with processing??

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