2023_Wed_7-15_solution

src/main/java/lab/BulletAnimated.java

 package lab;
 
 import javafx.geometry.Point2D;
+import javafx.geometry.Rectangle2D;
 import javafx.scene.canvas.GraphicsContext;
 import javafx.scene.image.Image;
 
@@ -80,4 +81,8 @@ public class BulletAnimated  {
 		accelerate = true;
 	}
 	
+	public Rectangle2D getBoundingBox() {
+		return new Rectangle2D(position.getX(), position.getY(), size, size);
+	}
+	
 }

src/main/java/lab/Dragon.java

+package lab;
+
+import javafx.geometry.Point2D;
+import javafx.geometry.Rectangle2D;
+import javafx.scene.canvas.GraphicsContext;
+import javafx.scene.image.Image;
+
+public class Dragon {
+	
+	private static final int SIZE = 40;
+
+	private final Image image = new Image(Dragon.class.getResourceAsStream("dragon.gif"));
+	
+	private final World world;
+	
+	private Point2D position;
+	
+	private Point2D speed;
+	
+	
+	
+	public Dragon(World world, Point2D position, Point2D speed) {
+		this.world = world;
+		this.position = position;
+		this.speed = speed;
+	}
+
+	public void draw(GraphicsContext gc) {
+		Point2D temp = world.getCanvasPoint(position, SIZE);
+		gc.drawImage(image, temp.getX(), temp.getY(), SIZE, SIZE);
+	}
+	
+	public void simulate(double deltaT) {
+		position = position.add(speed.multiply(deltaT));
+		position = new Point2D((position.getX() + world.getWidth()) % world.getWidth()
+				, (position.getY() + world.getHeight()) % world.getHeight());
+	}
+	
+	public Rectangle2D getBoundingBox() {
+		return new Rectangle2D(position.getX(), position.getY(), SIZE, SIZE);
+	}
+
+	public void hit() {
+		speed = speed.multiply(-1);
+		
+	}
+}

src/main/java/lab/World.java

 package lab;
 
 import javafx.geometry.Point2D;
+import javafx.geometry.Rectangle2D;
 import javafx.scene.canvas.GraphicsContext;
 
 public class World {
@@ -8,12 +9,23 @@ public class World {
 	private double height;
 	private BulletAnimated bulletAnimatted;
 	private Cannon cannon;
+	private Dragon []dragons;
+	private double actualTime;
+	private double lastHit;
 	
 	public World(double width, double height) {
 		this.width = width;
 		this.height = height;
 		cannon = new Cannon(this, new Point2D(50, 50), new Point2D(100, 20));
 		bulletAnimatted = new BulletAnimated(this, cannon, new Point2D(30, 60), new Point2D(0, 0), 40);
+		//init array
+		dragons = new Dragon[] {
+			new Dragon(this, new Point2D(50, 20), new Point2D(70, 50))
+			,new Dragon(this, new Point2D(150, 20), new Point2D(-140, 50))
+			,new Dragon(this, new Point2D(100, 70), new Point2D(7, 50))
+			,new Dragon(this, new Point2D(115, 900), new Point2D(170, 50))
+			
+			,new Dragon(this, new Point2D(60, 20), new Point2D(70, 50))};
 	}
 
 	public Point2D getCanvasPoint(Point2D worldPoint, double heightOfEntity) {
@@ -24,13 +36,31 @@ public class World {
 		gc.clearRect(0, 0, width, height);
 		cannon.draw(gc);
 		bulletAnimatted.draw(gc);
+		//for each dragon from dragons call draw
+		for(Dragon dragon: dragons) {
+			dragon.draw(gc);
+		}
 	}
 
 	public void simulate(double timeDelta) {
+		actualTime += timeDelta;
 		bulletAnimatted.simulate(timeDelta);
 		cannon.simulate(timeDelta);
+		//for each dragon from dragons call simulate
+		for(Dragon dragon: dragons) {
+			dragon.simulate(timeDelta);
+		}
+		if (actualTime - lastHit > 1) {
+			Rectangle2D bbOfBullet = bulletAnimatted.getBoundingBox();
+			for(Dragon dragon: dragons) { 
+				if (dragon.getBoundingBox().intersects(bbOfBullet)) {
+					dragon.hit();
+					lastHit = actualTime;
+				}
+			}
+		}
 	}
-
+	
 	public double getWidth() {
 		return width;
 	}