hi,

apologies if this gets covered every time a newbie runs into it, i did search the board first tho...

i made an amended version of the pixelarray example sketch, had an idea for some pdf vector stuff i wanted to try, and this first experiment works quite nicely, for a short time, then it grinds to a halt:

java.lang.ArrayIndexOutOfBoundsException: 40001

at Temporary_5229_6325.draw(Temporary_5229_6325.java:27)

at processing.core.PApplet.display(PApplet.java:1326)

at processing.core.PGraphics.requestDisplay(PGraphics.java:520)

at processing.core.PApplet.run(PApplet.java:1142)

at java.lang.Thread.run(Unknown Source)

you can see it at http://www.demiology.com/p5/pixelArrayModified
just click and drag horizontally to create straight line patterns, akin to the old 1-pixel wide full height selection in photoshop being transformed for instant patterns...


the code:
import processing.pdf.*;

PImage a;
color cp;
int[] aPixels;

void setup()
{
 size(200, 200);
 noFill();
 noStroke();
 framerate(30);
 a = loadImage("updoc.jpg");
 aPixels = new int[width*height];
 for(int i=0; i<width*height; i++) {
   aPixels[i] = a.pixels[i];
 }
}

void draw()
{
 background(51);
 image(a,0,0);
 if(mousePressed) {
     //beginRecord(PDF, "frame-####.pdf");
   for (int i=0; i<height; i++) {
     cp = aPixels[i*width + mouseX];
    stroke(cp);
     line(0,i,width,i);
   }
    //endRecord();
 }

}

thanks if you can tell me what it is i should be doing here!

d

that was quick
thanks man!