Open Source Interface

Processing sketches

2008-11-21T11:43:51-05:00

here goes a few sketches of my learning process.
i hope they will be usefull for a starting point .
Launch osc.exe, then the sketches in Processing.
I tried to comment the codes in a helpful way ...

For now all the sketches only managed direct inputs from TUIO.
TODO : implement a class that handles the inputs ( distance between points, dynamic objects ...)

the Paint is still buggy , there is opengl bug when opening it that i still don’t fix so
if you find a solution ,let me know !

[vimeo]2300781[/vimeo]

I failed in uploading the .rar archive here,but meanwhile you can get the sketches here

Java and OpenCv

2008-11-13T13:00:38-05:00

Hi, i’ve a problem to running open cv in java.
i downloaded all necessary following this guide: http://ubaa.net/shared/processing/opencv/
and under processing it works (but installing opencv 1.0 instead the latest version).
Now i want to use it in pure java environment, so i created a project under netbeans, i took the processing.core library, copied opencv.dll in OpenCv/bin directory and run the two examples with no error.
The problem is that i obtain a frame with black screen (webcam led is however on) and nothing is showed.

do you have any idea?

thanks in advance

Mac Mouse Driver

2008-10-16T20:19:02-05:00

I don’t really program in java, but I decided to throw a tuio mouse driver for mac os x based on the reactivision tuio demo java app. It works, but I am sure that the coding style isn’t really great, and there is probably a lot of extra stuff that doesn’t really need to be there. If anyone who actually knows java would like to clean it up for me, I would greatly appreciate it.

Processing and OSCP5 library

2008-11-09T14:48:12-05:00

I’ve been fooling around with processing lately and I’m trying to get build18er’s work to run:

http://nuigroup.com/forums/viewthread/161/

I keep getting a missing library error.

Maybe I’m confused where to put the library exactly?

In my preferences my sketchbook location is ~/Documents/Processing, so I unzipped oscP5.zip here ~/Documents/Processing/libraries/

leaving me with ~/Documents/Processing/libraries/oscP5

Is this right? Is it possible that this library doesn’t work with Processing 154 or 155? Or am I just putting these in the wrong place?

how to play the flash examples from touchlib?

2008-09-25T09:56:56-05:00

yeah, so how to play the flash examples from touchlib?
i managed to play the smoke demo
but not the flash one
cannot open them
i have the flash player installed
http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash

what else do i have to do ?
cheers

TUIO Simulator

2008-09-03T14:58:56-05:00

i think i’m missing something

it does not work, does not sent any events
did anybody tried it ?
cheers

wxWidgets and registerListener

2008-08-21T02:49:48-05:00

Hi,

Anyone tried to pass a wxGLCanvas window to the registerListener?
I can pass a wxFrame and that works, but what I don’t know yet is how to catch correctly the events on the GLcanvas.

If anyone is interested, I can provide an example on how to create the listener on a wxFrame and on how to create touch events (still on the wxFrame)
Of course the interesting part would be the wxGLCanvas....

So any help is welcome!

Thx
Greg

Anyone using (or used) Java for multitouch?

2008-06-27T17:05:21-05:00

Is anyone using or has anyone used Java for a multitouch app? Particularly using the open-table.org software?

Processing + Java + blobDetection = Question?XD

2008-07-06T18:19:46-05:00

Hi there, i’m new on this forum and also new to the MT technology. Its been 4 days that I do nothing more than just watch movies, pdf, tutorials, etc.. and today i’ve started coding with Java and I got this question.. I’m using processing libs and a lib called blobDetection from http://www.v3ga.net/processing/BlobDetection/, there is a project called lowres that makes blob tracking and also creates osc messages...I’ve been studying that code and ended up making one of my for tracking blobs… and the question is how can i send the x and y infos for multikey for example...i know that it works with touchlib and so i thought if i create a osc message equal to the ones created in touchlib than the flash app multikey would work too...am I thinking correctly? if you like i can post all the code here but it’s still at the begining....

Thanks all and I really LOVE all the work you all do here with all the projects!!! :D

TUIO Processing: Accessing x, y pos from the CursorList

2008-06-01T03:27:14-05:00

So I am hoping to use a multi-touch table I built with a classmate in a show on Wednesday. I have the great examples from picturetunes as well as the Demo from the TUIO website. They both run perfectly. My question is: How can I access the array of x and y positions of all the cursors from the main draw() function? If i have to create a whole program inside of the draw function of the TuioCursor class I guess I will...but Id rather not =P. Thanks a lot! Any suggestions would be helpful as I am a beginner at dealing with reading TUIO in Processing.

import processing.opengl.*;
import tuio.*;
TuioClient client;
TuiCursorList cursorList;
void setup()
{
size(1024,768, OPENGL);
client = new TuioClient(this); // the TuioClient receives the information from Touchlib
cursorList = new TuiCursorList(); //this is your little helper who handles all the cursors for you
frameRate(30);
}

void draw()
{
cursorList.draw(); //draw the cursors
smooth();
noStroke();
}

/*
based on:::::::::::::::::::::::::::::::::::::::::::::::
TUIO processing demo - part of the reacTIVision project
http://mtg.upf.es/reactable
by Martin Kaltenbrunner
(see bottom of page for details)
modified by::::::::::::::::::::::::::::::::::::::::::::
picturetunes (http://christoph.picturetunes.at)
*/

//***************************//
// PREDEFINED TUIO FUNCTIONS //
//***************************//

////the redraw functions are no longer needed because we use a constant framerate
// called after each message bundle
void refresh() {
//redraw();
}
// called when a cursor appears the scene
void addTuiCursor(Integer s_id) {
System.out.println("add cursor “+s_id);
cursorList.add(s_id);
//redraw();
}

// called when a cursor is removed from the scene
void removeTuiCursor(Integer s_id) {
System.out.println("remove cursor “+s_id);
cursorList.remove(s_id);
//redraw();
}

// called when a cursor is moved
void updateTuiCursor (Integer s_id, Float xpos, Float ypos) {
//System.out.println("update cursor “+s_id+” “+xpos+” “+ypos);
float xsize =width;
float ysize =height;
//the following lines of code could be probably improved
// the position values are read and casted to float
// the values should (but strangely do not precicesly) start at 0 and end at 1 so you have to multiply them by the screensize to map them to the screen
// the calculated values are subtracted from the screensize to mirror the coordinates
cursorList.update(s_id,(float)xsize-((xsize*xpos.floatValue())),ysize-((float)(ysize*ypos.floatValue())));
//redraw();
}
//****************//
// LITTLE HELPERS //
//****************//

//this class stores all the cursors…
class TuiCursorList {
java.util.Hashtable cursorList;

TuiCursorList() {
//...in this java hastable
cursorList = new Hashtable();
}
//call the draw method of the cursors (just for testing to see what is happening)
void draw() {
Enumeration e = cursorList.elements();
while (e.hasMoreElements()) {
TuioCursor cursorPoint = (TuioCursor)e.nextElement();
cursorPoint.draw();
}
}
//create new cursor instance
void add(Integer s_id) {
//Vector pointList = new Vector();
TuioCursor cursorPoint = new TuioCursor();
cursorList.put(s_id,cursorPoint);
}
//remove cursor
void remove(Integer s_id) {
cursorList.remove(s_id);
}
//update cursor position
void update(Integer s_id, float xpos, float ypos) {
// println("number of cursors in cursor list:"+cursorList.size());
// that is a nasty little detail: for some reason updateTuiCursor() is called before add addTuiCursor()
// which causes the programm to behave strangly. to avoid that you want to check if the object you want ot update is already there
if(cursorList.containsKey(s_id)){
TuioCursor cursorPoint = (TuioCursor)cursorList.get(s_id);
cursorPoint.update(xpos,ypos);
}
}
}
// this is the class for the cursors. it doesn`t do pretty much yet but of course you can extend it!
class TuioCursor{
public float x,y;

TuioCursor(){
//println("hello i am a tuio cursor");

}

void update(float px, float py){
// println("hurray somebody updates my position x:"+px+" y"+y);
this.x=px;
this.y=py;
}

void draw(){

//this comes handy for testing - you get visual response from your cursors
//println("hurray somebody draws me");
fill(0,50);
ellipse(x, y, 16, 16);
fill(250,50);
rect(0,0,width, height);
}

}