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examples/zm_follow/Eye.java

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+import schule.ngb.zm.Color;
+import schule.ngb.zm.DrawingLayer;
+import schule.ngb.zm.Vector;
+import schule.ngb.zm.Zeichenobjekt;
+
+public class Eye extends Zeichenobjekt {
+
+	private Vector position;
+
+	private double size;
+
+	private Color color;
+
+	public Eye() {
+		position = Vector.random(0, width, 0, height);
+		size = random(10.0, 25.0);
+		color = null;
+	}
+
+	public Eye( float x, float y ) {
+		position = new Vector(x, y);
+		size = random(10.0, 25.0);
+		color = null;
+	}
+
+	public Eye( float x, float y, Color color ) {
+		position = new Vector(x, y);
+		size = random(10.0, 25.0);
+		this.color = color;
+	}
+
+	@Override
+	public void draw( DrawingLayer drawing ) {
+		Vector dir = Vector.sub(new Vector(mouseX, mouseY), position);
+		double len = dir.length();
+
+		drawing.setStrokeColor(0);
+		if( color == null ) {
+			drawing.setFillColor(colorHsb(354, 100.0 - limit(len, 0.0, 100.0), 100));
+		} else {
+			drawing.setFillColor(color);
+		}
+		drawing.circle(position.x, position.y, size);
+
+
+		Vector pupil = Vector.add(position, dir.limit(size*.4));
+
+		drawing.setFillColor(0);
+		drawing.circle(pupil.x, pupil.y, size*.4);
+	}
+}