World.java

package lab;

import java.util.Iterator;

import javafx.geometry.Point2D;
import javafx.scene.canvas.GraphicsContext;

public class World {

	private final double width;

	private final double height;

	private DrawableSimulable[] entities;

	public World(double width, double height) {
		this.width = width;
		this.height = height;
		entities = new DrawableSimulable[8];
		Cannon cannon = new Cannon(this, new Point2D(0, height - 20), -45);
		entities[0] = cannon;
		entities[1] = new Bullet(this, new Point2D(0, height), new Point2D(30, -30), new Point2D(0, 9.81));
		entities[2] = new BulletAnimated(this, cannon, new Point2D(0, height), new Point2D(50, -80),
				new Point2D(0, 9.81));
		for (int i = 3; i < entities.length; i++) {
			entities[i] = new Ufo(this);
		}
	}

	public void draw(GraphicsContext gc) {
		gc.clearRect(0, 0, width, height);

		gc.save();
		for (DrawableSimulable entity : entities) {
			entity.draw(gc);
		}
		gc.restore();
	}

	public void simulate(double deltaT) {
		for (DrawableSimulable entity : entities) {
			entity.simulate(deltaT);
		}
		for (int i = 0; i < entities.length; i++) {
			if (entities[i] instanceof Collisionable c1) {
				for (int j = i + 1; j < entities.length; j++) {
					if (entities[j] instanceof Collisionable c2) {
						if (c1.intersect(c2.getBoundingBox())) {
							c1.hitBy(c2);
							c2.hitBy(c1);
						}
					}
				}
			}
		}
	}

	public double getWidth() {
		return width;
	}

	public double getHeight() {
		return height;
	}

}