gann-cdf / graphics

import org.gannacademy.cdf.graphics.ui.AppWindow;

import java.util.ArrayList;

import java.util.List;

public class Animation extends AppWindow {

    List<Bubble> bubbles;

    @Override

    protected void setup() {

        bubbles = new ArrayList<>();

        for (int i = 0; i < 50; i++) {

            bubbles.add(new Bubble(getDrawingPanel()));

        }

    }

    @Override

    protected void loop() {

        long start = System.currentTimeMillis();

        for (Bubble b : bubbles) {

            b.step();

        }

        List<Bubble> trash = new ArrayList<>();

        for (Bubble b : bubbles) {

            if (!trash.contains(b)) {

                for (Bubble c : bubbles) {

                    if (b != c && !trash.contains(c) && b.intersects(c)) {

                        b.absorb(c);

                        trash.add(c);

                    }

                }

            }

        }

        for (Bubble b : trash) {

            bubbles.remove(b);

            b.close();

        }

        sleep(50 - (System.currentTimeMillis() - start));

    }

}