Hi! I try to display a text that is colorized by a live camera capture. I took part of some codes to make it work but there's a strange error message.

There's the code :


import processing.video.*;
int cellsize = 100;
int cols, rows;
Capture video;
PFont font;
String lines[];


void setup() {
 
 size(400, 400);
 frameRate(30);
 cols = width/cellsize;
 rows = height/cellsize;
 
 
 video = new Capture (this, 80, 60, 15);
 font = loadFont("Verdana.vlw");
 textFont(font,24);
 lines = loadStrings ("mytext.rtf");
}

void captureEvent (Capture camera){
 camera.read();
}


void draw() {
 
 
 background(0);
 
 textFont(font, 50);
 textAlign(CENTER);

 for ( int i = 0; i < cols;i++) {
   for ( int j = 0; j < rows;j++) {
     int x = i*cellsize;
     int y = j*cellsize;
     int loc = video.width + y*video.width;      
 float r = red(video.pixels[loc]);
 float g = green(video.pixels[loc]);
 float b = blue(video.pixels[loc]);
 color c = color(r,g,b,75);

fill(c);
   }
 }
for (int t=0; t<lines.length; t++){
 text(lines[t], width, (t*35));
 t++;
}
}


and there's the error message :

java.lang.ArrayIndexOutOfBoundsException: 8080
at Temporary_3094_4846.draw(Temporary_3094_4846.java:43)
at processing.core.PApplet.handleDisplay(PApplet.java:1355)
at processing.core.PGraphics.requestDisplay(PGraphics.java:564)
at processing.core.PApplet.run(PApplet.java:1450)
at java.lang.Thread.run(Thread.java:613)

java.lang.ArrayIndexOutOfBoundsException: 8080
at Temporary_3094_4846.draw(Temporary_3094_4846.java:43)
at processing.core.PApplet.handleDisplay(PApplet.java:1355)
at processing.core.PGraphics.requestDisplay(PGraphics.java:564)
at processing.core.PApplet.run(PApplet.java:1450)
at java.lang.Thread.run(Thread.java:613)

I'm not familiar with coding so there's a lot of mistake in my code (I think). Help me please to soluce this!

thanks ! I going to try this !

It's quite simple, that means it was expecting a ";" but found "to".

It's this chunk:

for (j=0 to j<cols) //<---
{
 int y = j * ystep;
 for (i=0 to i<rows) //<---

you should read/learn more about java/c language..

what i wrote was pseudo code..


the lang correct version is:

for( int j=0; j<cols; j++ )
{
 for( int i=0; i<rows; i++ )
 {


the error msgs usually are quite easy to understand..
it points the error line and like john pointed it was expecting a ; and it found 'to'.. easy to fix
i believe you need to go through some java book/tutorial before attempting to go any further.

at a glance, i think the only thing that was actually wrong with your original code was that this line:
int loc = video.width + y*video.width;    
should have been:
int loc = x + y*video.width;    
(which is what you changed it to later) for what it's worth...

Yes I know that I must use "txt" files. It was just or the example. Now, my code works. But I have a last problem. My purpose is to use the live capture to "illumate" the text. For example, in a dark room with a infra-red camera, a man enter and his shape in the screen is create by letters of the text, like this :

                    yes                       gfg
fs               very j                    gfd
fdf              ok f                   gfg
ghjfkdlfdlfldffgfdgfdgfdsdf
       ,kfldkfldgkfdkgf
       jfkdjgkfdjgkfdjk
        fdsfdsfdsfdsfd
         fdfdsfdsfdsfd
          fdsfdsfdsfdf
           fdsf      fdsf
           fdsf      fdd

My drawing is beautiful!
So, with this code, I tried to interpet the luminosity and colour of the live capture as the colour of each character.

But now, with this code, the luminosity and the colour of the video is assigned (english?) to the whole text and not to each characters...

How can I do?

the code  :


import processing.video.*;
int cellsize = 100;
int cols = 10;
int rows = 10;
Capture video;
PFont font;
String lines[];


void setup() {
 
 size(400, 400);
 frameRate(30);
 video = new Capture (this, 80, 60, 15);
 font = loadFont("Verdana.vlw");
 textFont(font,5);
 lines = loadStrings ("mytext.txt");
}

void captureEvent (Capture camera){
 camera.read();
}


void draw() {
 
 
 background(0);
 
 textFont(font, 10);
 
 
 int xstep = video.width / rows;
 int ystep = video.height / cols;
 for (int j=0; j<cols; j++){
   int y = j * ystep;
   for (int i=0; i<cols; i++)
   {
     int x = i * xstep;
     int loc = x + y * video.width;
     
     float r = red(video.pixels[loc]);
     float g = green(video.pixels[loc]);
     float b = blue(video.pixels[loc]);
     color c = color(r,g,b,75);
     fill(c);
   }
 }
for (int t=0; t<lines.length; t++){
 text(lines[t]+"\n", width, (t*35));
t++;
}

for (int t=0; t<lines.length; t++){
 int g = 30;
 text(lines[t],g, 60);
t++;
for (int m = 1; m < video.width; m++) {
   translate(0,8/0.5);
}
}
}