weird behavior analyzing pixels to get color

Programming Questions

datamosh

in Programming Questions • 10 months ago

I can't understand why i can't get the right color from the image when look for it within draw;

I expect to have every new ellipse filled with the color of the corresponding pixels in the reference image, as I always used to.

Any advice? Please It's been two days now I'm struggling with this and It's driving me crazy!!!!!

PImage imgref;
// int totpix;
void setup() {
imgref = loadImage("http://www.outsidernews.net/wp-content/uploads/2012/07/giocatori_carte_cezanne.jpg");
size(imgref.width, imgref.height);
background(0);
//totpix = imgref.width *imgref.height;
noStroke();
frameRate(200);
setImageAsEllipses();
}
void draw() {
for (int i=0; i< 20; i++) {
float x = random(width);
float y = random(height);
if (x>0 && x<width-1 && y>0 && y<height-1) {
int loc = int((x + y * imgref.width));
color c = imgref.pixels[loc];
fill(c);
ellipse(x, y, 2, 2);
}
}
}
void setImageAsEllipses() {
for (int x=0; x<imgref.width; x++) {
for (int y=0; y<imgref.height; y++) {
int i= x + y*imgref.width;
color c = imgref.pixels[i];
fill(c);
ellipse(x, y, 1, 1);
}
}
}

Replies(1)

datamosh

10 months ago

ok, the problem was with

I had to use

or better I show the final code:

PImage imgref;
int totpix;
void setup() {
imgref = loadImage("http://www.outsidernews.net/wp-content/uploads/2012/07/giocatori_carte_cezanne.jpg");
//imgref = loadImage("giocatoridicarte.png");
imgref.loadPixels();
size(imgref.width, imgref.height);
background(0);
totpix = imgref.width *imgref.height;
noStroke();
frameRate(200);
}
void draw() {
for (int i=0; i< 20; i++) {
int x = int(constrain(random(width), 0, width-1));
int y = int(constrain(random(height), 0, height-1));
int loc = x + (y * int(imgref.width));
color c = imgref.pixels[loc];
fill(c);
ellipse(x, y, 2, 2);
}
}

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