added 'Shell' and 'ShellControl' and editet the two visitors 'Visitor' and 'VoidVisitor'

Projekte/battleship/client/src/main/java/pp/battleship/client/gui/ShellControl.java

@@ -0,0 +1,41 @@
+package pp.battleship.client.gui;
+
+import com.jme3.renderer.RenderManager;
+import com.jme3.renderer.ViewPort;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.control.AbstractControl;
+import pp.battleship.model.Shell;
+import pp.battleship.model.ShipMap;
+
+public class ShellControl extends AbstractControl {
+
+    private Shell shell;
+    private ShipMap map;
+
+    private static final Float HEIGHT = 0f;
+
+    public ShellControl(Shell shell, ShipMap map){
+        this.shell=shell;
+        this.map=map;
+    }
+
+    @Override
+    protected void controlUpdate(float tpf) {
+        if (spatial == null) return;
+        if(spatial.getLocalTranslation().getY()<=HEIGHT){
+            spatial.getParent().detachChild(spatial);
+        }
+        else{
+            spatial.move(0,-0.5f*tpf,0);
+        }
+    }
+
+    @Override
+    protected void controlRender(RenderManager rm, ViewPort vp) {
+
+    }
+
+    public Shell getShell(){
+        return shell;
+    }
+}