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Help.....getting an out of bound exeception

Former Member over 10 years ago

I am trying to get the code below to distort an image. The distortion creates square bumps on the image surface.

The code below keeps giving me an out of bounds exeception. Hope someone could find the problem.

***********************************************************

PImage img;

PImage img_new;

int cellsize=2;

int cols, rows;

void setup(){

size(600,600);

img=loadImage("bcircle.jpg");

img_new=createImage(img.width,img.height,RGB);

cols = width/cellsize;

rows = height/cellsize;

}

void draw(){

img.resize(img.width,img.height);

img_new.loadPixels();

int shif=0;

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

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

int x=i*cellsize+cellsize/2;

int y=j*cellsize+cellsize/2;

int loc=x+width*y;

int left_loc=(x-cellsize)+width*y;

if(x>cellsize && x<width-cellsize && shif%2==0){

img_new.pixels[loc] = color (img.pixels[left_loc]);

}else{

img_new.pixels[loc] = color (img.pixels[loc]);

}

shif++;

img_new.updatePixels();

image(img_new,0,0);

}

Parents

gadget.iom over 10 years ago

Hi Eddy.

Ignore my last post. It's looked like you were using processing, so I downloaded a copy and attempted to replicate the issue.

I have no experience with processing and the code works with an image of 600pxx600px and above, but it seems to fail when the image falls below that size.

Is the bcirgle.jpg image you're using 600x600?

I have now modified the code so that it loads the image first and defines the canvas based on the dimensions determined from the image itself. This means you can have an image of any dimensions, even non square ones. (Hopefully)

Code:

PImage img;
PImage img_new;
int cellsize=2;
int cols, rows;


void setup(){
//size(600,600);
img=loadImage("bcircle.jpg");
size(img.width, img.height);
img_new=createImage(img.width,img.height,RGB);
cols = width/cellsize;
rows = height/cellsize;
}


void draw(){
  img.resize(img.width,img.height);
  img_new.loadPixels();
  int shif=0;
  for(int j=0; j<rows; j++){
    for(int i=0; i<cols; i++){
     int x=i*cellsize+cellsize/2;
     int y=j*cellsize+cellsize/2;
     int loc=x+width*y;
     int left_loc=(x-cellsize)+width*y;
     if(x>cellsize && x<width-cellsize && shif%2==0){
       img_new.pixels[loc] = color (img.pixels[left_loc]);     
     }else{
       img_new.pixels[loc] = color (img.pixels[loc]);
     }
    }
   }
   shif++;
   img_new.updatePixels();
   image(img_new,0,0);
}

Line 8 has been commented out and line 10 added. Let me know how you get on.

Paul

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