Hello all,

I tried to code a LightPainting sketch for educational use. I don't need a superb result but something basic and, if possible, fun.

My current code display some "splash" during the record. It's very ugly but I don't know how to reduce this.

Here is a example of what I called "splash" :



And here is the code :

1. cam.loadPixels();
2. screen.loadPixels();
3. for (int i = 0; i < cam.pixels.length; i++) {
4.       if ((brightness(cam.pixels[i]) > brightLimit) && (brightness(cam.pixels[i]) > brightness(screen.pixels[i]))) {
5.             screen.pixels[i] = cam.pixels[i];
6.       }
7. }
   

Entire code is on GitHub if you want to help a newbie.

Thanks for your help.

Hello all,

I coded a LightPainting sketch for educationnal use, with the core video library. The result is basic but not so bad.

The problem cames when I wanted to export application (for windows). Files are well created but the sketch doesn't run. I just see a terminal which disapear quickly (I can't read the short message noted) .

I use processing 2.0.2, on W7 64 bits.

Is there some details I have to check to resolve my problem ?

Thanks for your help.

Edit : Same problem when I try to run program on XP
Edit2 : Weird issue : I exported the sketch with XP emulator (VirtualBox) in Ubuntu ( since Processing crash on my Ubuntu station). It works !
There's may be a problem with "export application" in W7 !?

Hi all,

Processing don't start up after a OS upgrade (12.04 >  12.10 > 13.04).

Here is the error :

Fatal: Read Error: Could not read or parse the JNLP file.

With these details :

net.sourceforge.jnlp.LaunchException: Fatal: Read Error: Could not read or parse the JNLP file.
    at net.sourceforge.jnlp.Launcher.fromUrl(Launcher.java:491)
    at net.sourceforge.jnlp.Launcher.launch(Launcher.java:283)
    at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:211)
    at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:53)
    at java.security.AccessController.doPrivileged(Native Method)
    at net.sourceforge.jnlp.runtime.Boot.main(Boot.java:177)
Caused by: net.sourceforge.jnlp.ParseException: Invalid XML document syntax.
    at net.sourceforge.jnlp.Parser.getRootNode(Parser.java:1305)
    at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:206)
    at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:190)
    at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:175)
    at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:161)
    at net.sourceforge.jnlp.Launcher.fromUrl(Launcher.java:477)
    ... 5 more
Caused by: net.sourceforge.nanoxml.XMLParseException: XML Parse Exception during parsing of the XML definition at line 1: Expected: '<' but got: '#'
    at net.sourceforge.nanoxml.XMLElement.expectedInput(XMLElement.java:1143)
    at net.sourceforge.nanoxml.XMLElement.parseFromReader(XMLElement.java:503)
    at net.sourceforge.nanoxml.XMLElement.parseFromReader(XMLElement.java:464)
    at net.sourceforge.jnlp.Parser.getRootNode(Parser.java:1301)
    ... 10 more

I tried google.
I tried to uninstall & reinstall java
Tested with 2.0 and 2.0.2 Processing versions.

Same error...

Thanks for your help.

PS : I'm not sure it's the right place for this question. Sorry if not.

Hi all.

I'm learning coding and specialy Processing (2.0b8). For my first Android App, I need to execute the phone flashlight (i9100).

I thought Ketai librarie was the solution but the phone flash don't agree with me.

I try something like that (mainly cut/paste from ketai page):

1. import ketai.camera.*;
2. KetaiCamera cam

Then, in setup

1.   cam = new KetaiCamera(this, 320, 240, 24);
   

Then, in draw :

1.   if (ZoneFlash()) {
2.     FlashOnOff = ! FlashOnOff;
3.     if (cam.isFlashEnabled()) {
4.       cam.disableFlash();
5.     } else {
6.       cam.enableFlash();
7.     }
8.   }
   

Edit (30/04/2013) :

This code doesn't works when I Ioad the app for the first time but works if I press the Home phone button then reload the app. If I do the same (Home button then app), there is a crash !

How can this happen ? Exit and reload make flashlight work ! But it works only one time ...

Thanks for your help.