Resizing images avoiding blur

fradiniccolo

Hello guys,

I have an issue with image resizing.

For example, I want that my image, img, change its dimension according with mouseY coordinate.

But doing this, after some iterations image become blurred.

I suppose this happens every resizing is cumulative.

So I set a new image variable, img2, that I reset in every draw() cicle.

PImage img;

void setup() {
  size(400, 400);
  img = loadImage("ball.png");
}

void draw() {
  background(255);
  PImage img2 = img;
  int y = int(map(mouseY, 0, height, 200, 400));
  img2.resize(y, y);
  image(img2, 0, 0);
}

Apparently this don't solve my problem.

Can you guys help me?

GoToLoop

Indeed resize() is cumulative since it changes the PImage structure!
Since you're dynamically redimensioning the PImage's rendering, why don't you call image() w/ 4 parameters? :
http://processing.org/reference/image_.html

fradiniccolo

Well, this totally help me. Thank you very much.

PImage img;

void setup() {
  size(400, 400);
  img = loadImage("ball.png");
}

void draw() {
  background(255);
  int y = int(map(mouseY, 0, height, 200, 400));
  image(img, 0, 0, y, y);
}