Solved Task 3

src/ch/zhaw/ads/ADS4_2_test.java

@@ -6,7 +6,7 @@ import org.junit.jupiter.api.BeforeEach;
 import java.util.StringTokenizer;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-/*
+
 public class ADS4_2_test {
     HilbertServer hlb;
     Turtle turtle;
@@ -97,4 +97,3 @@ public class ADS4_2_test {
         }
     }
 }
-*/

src/ch/zhaw/ads/HilbertServer.java

@@ -0,0 +1,40 @@
+package ch.zhaw.ads;
+
+import ch.zhaw.ads.CommandExecutor;
+import ch.zhaw.ads.Turtle;
+
+public class HilbertServer implements CommandExecutor {
+    Turtle turtle;
+
+    @Override
+    public String execute(String command) {
+        int depth = Integer.parseInt(command);
+        double dist = 0.8 / (Math.pow(2,depth+1)-1);
+        turtle = new Turtle(0.1, 0.1);
+        hilbert(depth, dist, -90);
+        return turtle.getTrace();
+    }
+
+    public void hilbert(int depth, double dist, double angle){
+        if(depth < 0){
+            return;
+        }
+        depth --;
+        turtle.turn(-angle);
+        // draw recursive
+        hilbert(depth, dist, -angle);
+        turtle.move(dist);
+        turtle.turn(angle);
+        // draw recursive
+        hilbert(depth, dist, angle);
+        turtle.move(dist);
+        // draw recursive
+        hilbert(depth, dist, angle);
+        turtle.turn(angle);
+        turtle.move(dist);
+        // draw recursive
+        hilbert(depth, dist, -angle);
+        turtle.turn(-angle);
+
+    }
+}