The code I am using is copied straight from one of the included examples.

2. import SimpleOpenNI.*;
3. 
   
4. SimpleOpenNI  context;
5. 
   
6. void setup()
7. {
8.   context = new SimpleOpenNI(this);
9.   
10.   // enable depthMap generation
11.   if(context.enableScene() == false)
12.   {
13.      println("Can't open the sceneMap, maybe the camera is not connected!"); 
14.      exit();
15.      return;
16.   }
17.  
18.   background(200,0,0);
19.   size(context.sceneWidth() , context.sceneHeight()); 
20. }
21. 
    
22. void draw()
23. {
24.   // update the cam
25.   context.update(); 
26.    
27.   // draw irImageMap
28.   image(context.sceneImage(),0,0);
29. }

In the new beta (2.06b) I am having issues getting sketches to run fullscreen presentation mode in OSX Lion when using a projector/dual screen.  It works fine on the computer by itself, but when I set up to a projector and do "mirror displays" the sketch wont appear on the screen if you start it in presentation mode.  It just stays grey or appears to not come up at all (though the Java icon does appear in the running apps list).  If you do an extended display, it works fine -- it opens up full screen in the secondary monitor/projector by default and works great.  But I can't do mirror displays in presentation mode it seems.

I am using Processing 1.5 on OSX Lion.

I am using the InteractiveAvatar class to track a position in 3-d space.  Using avatar.setPosition(x, y, z) I am able to keep the camera constantly focused on this moving point.  But I'd like the camera itself to be originating at another point x,y,z which is constantly moving.  How can I move the camera to this point without having to calculate the azimuth and inclination manually?

Kinect depth image is null for me when the renderer is OPENGL.  

The following code works fine for me...

But by simply importing processing.opengl.* and changing renderer to OPENGL, i.e. size(640,480,OPENGL), the program crashes on first draw because kinect.depthImage() is null, with the following error.

Does anyone know what the issue is?  I am on OSX Lion with Processing 1.5.1, SimpleOpenNI version 0.24.

I would like to be able to map a projection onto a physical body via kinect tracking, using the depth map.  Anyone have advice for best way to do this?  Ideally, it would involve a mask which is transparent where depth < X and opaque everywhere else.  then image is visible only on pixels for which depth is sufficiently shallow (i.e. a body).  But a point by point pixel loop seems computationally expensive.  Or if there is a library which does this, that would be best.

Does anyone know how I can get touch / multitouch data from a touch screen monitor?  I'd like to create interaction in my sketch using multitouch, but so far the only libraries that address these seem to be either a) for android, or b) the TUIO libraries based on computer vision tracking.  I'd like something that simply wraps monitor touch info into Processing. I've also looked at mt4j library but it doesn't seem to support 64-bit.      

Looking to implement some computer vision inside Processing.  I'm on a Windows 7 computer.  There looks to be a couple of ports for OpenCV on the libraries page.  Does anyone have recommendations as to which is the best?  The "recommended" one called OpenCV is working off the oldest version of OpenCV, version 1.0.  Could this library be out of date or suboptimal?  I'd like to use OpenCV for object/person tracking primarily.  

I am having trouble getting video capture to work properly.  I am on Windows 7, have installed VDIG 1.0.1 and removed and reinstalled Quicktime for Windows.  When I run the example video capture program, Processing continues to run (no crash, no errors reported) and the light on my camera turns on indicating that it's running, however the frame appears totally black.  In other environments (openFrameworks and Max/Msp) the camera works fine. Does anyone know what my issue may be?

I uploaded the following working processing sketch today:  http://culturehacking.fm/code/SOM/ (not sized properly at the moment).  

I am trying to embed it into a Wordpress (.org) post but I am having difficulty.  I tried to copy and paste the html from the index page (everything within the first div brackets) and replacing SOM.jar with the full path/SOM.jar but it still doesn't display correctly.  Does anyone have any experience with this?  The html I have currently is this:

<div id="content">
	<div id="SOM_container">
	<!-- This version plays nicer with older browsers,
	but requires JavaScript to be enabled.
	http://java.sun.com/javase/6/docs/technotes/guides/jweb/deployment_advice.html -->
	<script type="text/javascript"
	src="http://www.java.com/js/deployJava.js"></script>
	<script type="text/javascript">
	/* <![CDATA[ */
	var attributes = {
	code: 'SOM.class',
	archive: ' http://culturehacking.fm/code/SOM/SOM.jar',
	width: 720,
	height: 600,
	image: 'loading.gif'
	};
	var parameters = { };
	var version = '1.5';
	deployJava.runApplet(attributes, parameters, version);
	/* ]]> */
	</script>
	<noscript> <div>
	<!--[if !IE]> -->
	<object classid="java:SOM.class"
	type="application/x-java-applet"
	archive="SOM.jar"
	width="720" height="600"
	standby="Loading Processing software..." >
	<param name="archive" value=" http://culturehacking.fm/code/SOM/SOM.jar" />
	<param name="mayscript" value="true" />
	<param name="scriptable" value="true" />
	<param name="image" value="loading.gif" />
	<param name="boxmessage" value="Loading Processing software..." />
	<param name="boxbgcolor" value="#FFFFFF" />
	<param name="test_string" value="outer" />
	<!--<![endif]-->
	<!-- For more instructions on deployment,
	or to update the CAB file listed here, see:
	http://java.sun.com/javase/6/webnotes/family-clsid.html
	http://java.sun.com/javase/6/webnotes/install/jre/autodownload.html -->
	<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
	codebase="http://java.sun.com/update/1.6.0/jinstall-6u20-windows-i586.cab"
	width="720" height="600"
	standby="Loading Processing software..." >
	<param name="code" value="SOM" />
	<param name="archive" value=" http://culturehacking.fm/code/SOM/SOM.jar" />
	<param name="mayscript" value="true" />
	<param name="scriptable" value="true" />
	<param name="image" value="loading.gif" />
	<param name="boxmessage" value="Loading Processing software..." />
	<param name="boxbgcolor" value="#FFFFFF" />
	<param name="test_string" value="inner" />
	<p>
	<strong>
	This browser does not have a Java Plug-in.
	<br />
	<a href="http://www.java.com/getjava" title="Download Java Plug-in">
	Get the latest Java Plug-in here.
	</a>
	</strong>
	</p>
	</object>
	<!--[if !IE]> -->
	</object>
	<!--<![endif]-->
	</div> </noscript>
	</div>
	<p>
	</p>
	<p>
	Source code: <a href="SOM.pde">SOM</a>
	</p>
	<p>
	Built with <a href="http://processing.org" title="Processing.org">Processing</a>
	</p>
	</div>

Hi all,

I am trying to add a logfile to my online processing sketch so i can see how many people interact with my sketch in various ways.  I wrote a little php script which appends a line to a text file, given some parameters in the url string, i.e.

mywebsite.com/sketch/log.php?a=5&b=7 writes 5 and 7 to a running text file.  I'd like to pass the a and b parameters via my processing sketch by making an http request to that php page.

I copied and modified the code directly from Processing's http client documentation ( http://processing.org/learning/library/httpclient.html) into the following code below.  The problem is that after running the script, it makes no change to the logfile, even though just typing the page into my browser does.  Can anyone see what I am doing wrong?  Thanks!  Code follows....

I have a program which does some heavy computation inside the draw() loop.  Every time I run the program, it only displays the window after the first instance of draw() is run, after which it won't update again until the draw loop terminates.  Is there some way to force the program to redraw the screen at each instance of draw()?

Gene

Is it possible to draw shapes (rect, ellipse, etc) onto pixels after declaring loadPixels()?  In the tutorials, I only see assigning colors to pixels one by one, e.g. pixels[5] = color c.  But I'd like to be able to draw an ellipse onto my picture, then update pixels accordingly.  Is this possible?

Gene

I need to be able to find the pixel whose color is closest to some color c.  I am doing this thousands of times and need a way to do it *fast*.  The loop-based way I wrote below is taking too long (by a factor of at least 100x!).  Is there a much more efficient way to locate the individual pixel whose distance from c is at a minimum?

Bad code follows...

int mindist = 1000;

int currdist, r1, g1, b1;

int bestX = width/2; int bestY = height/2;

color c1 = color(255,255,255);

for (int i = 0; i<width; i++) {

  for (int j = 0; j<height; j++) {

    c1 = get(i,j);

    r1 = (int)red(c1); g1 = (int)green(c1); b1 = (int)blue(c1);

    currdist = abs(r-r1) + abs(g-g1) + abs(b-b1) + abs(g-g1);

    if (currdist<mindist) {

      bestX = i;

      bestY = y;

    }

  }

I wrote the following code to do it:

color c = color(0,0,255);

for (int r=0; r<255; r++) {

      fill(c,1);

      ellipse(x,y,2*r,2*r);

}

But at the end, the center point color is only (0,0,128).  After r=128, it stops increasing.  How can I get this right?  Thanks!

gene

I am trying to figure out what the best way of determining which pixel in an array is the closest to some query color.  For example, if I have an array of colors and some query color(100,100,5), I'd like to find the index of the element in my array which has the closest (by subtraction or euclidean distance) to that query.  Preferably there is a fast way of doing this which doesn't involve looping.