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examples/zm_aquarium/Fish.java

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+import schule.ngb.zm.*;
+import schule.ngb.zm.shapes.Picture;
+import schule.ngb.zm.shapes.Shape;
+
+import java.awt.Graphics2D;
+import java.awt.geom.AffineTransform;
+
+public class Fish extends Shape implements Updatable {
+
+	private int speed;
+
+	private Picture img;
+
+	public Fish() {
+		randomize();
+	}
+
+	public void randomize() {
+		int i = random(1, 7);
+		speed = random(-2, 2);
+		img = new Picture("fish" + i);
+		img.setAnchor(NORTHWEST);
+		img.scale(random(0.8, 1.0));
+		img.tint(randomNiceColor());
+		//img.scale(0.5);
+		if( speed < 0 ) {
+			img.flip(LEFT);
+		}
+		img.moveTo(random(10, width-img.getWidth()), random(30, height-120));
+	}
+
+	@Override
+	public boolean isActive() {
+		return true;
+	}
+
+	@Override
+	public void update( double delta ) {
+		img.move(speed, .5 * sin(tick / (speed * 10.0)));
+
+		if( img.getX() <= 0 || img.getX()+img.getWidth() >= 800 ) {
+			speed *= -1;
+			img.flip(LEFT);
+		}
+	}
+
+	@Override
+	public void draw( Graphics2D graphics, AffineTransform transform ) {
+		img.draw(graphics, transform);
+	}
+
+	@Override
+	public double getWidth() {
+		return img.getWidth();
+	}
+
+	@Override
+	public double getHeight() {
+		return img.getHeight();
+	}
+
+	@Override
+	public Shape copy() {
+		return img.copy();
+	}
+
+	@Override
+	public java.awt.Shape getShape() {
+		return img.getShape();
+	}
+
+}