Movement by mouse problem

I have found a sample code for object movement by mouse.
However, when I tried to change something in the code, for example, I changed the mouse driven cube in the code to be a model(the model is inside the jme3-test-data library), the model is disappeared, I don’t know how to fix it so I want some helps.
many thanks.
here is the code, runs the code by adding jme3-test-data library.

before editing
cubechar = new Node();
cubechar.attachChild(makeCube(“Character”, 0, 0.5f, 0));

after editing:
/**after editing*/
cubechar = (Node)assetManager.loadModel(“Models/Ninja/Ninja.mesh.xml”);

package mygame;

import com.jme3.collision.CollisionResult;
import com.jme3.collision.CollisionResults;
import com.jme3.font.BitmapText;
import com.jme3.input.MouseInput;
import com.jme3.input.controls.ActionListener;
import com.jme3.input.controls.MouseButtonTrigger;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Ray;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.shape.Box;
import com.jme3.scene.shape.Sphere;

public class Main extends SimpleApplication {

public static void main(String[] args) {
Main app = new Main();

Node cubechar;
Node shootables;
Geometry mark;

Boolean shoot = false;
Vector3f vectry;
Vector3f vectry2;
Vector3f vecmove;
float vecdist2;
float move;
float remainingDist;

public void simpleInitApp() {
initCrossHairs(); // a “+” in the middle of the screen to help aiming
initKeys(); // load custom key mappings
initMark(); // a red sphere to mark the hit

/** create four colored boxes and a floor to shoot at: */
shootables = new Node("Shootables");

/**after editing*/
cubechar = (Node)assetManager.loadModel(“Models/Ninja/Ninja.mesh.xml”);

cam.setLocation(new Vector3f(0.0f, 35.0f, 10.0f));
cam.lookAtDirection(new Vector3f(-0.009993265f, -0.9400059f, -0.34101164f), Vector3f.UNIT_Y);



/** Declaring the “Move” action and mapping to its triggers. /
public void initKeys() {
inputManager.addMapping(“Move”, new MouseButtonTrigger(MouseInput.BUTTON_LEFT)); // trigger 2: left-button click
inputManager.addListener(actionListener, “Move”);
* Defining the “Move” action: Determine what was hit and how to respond. */
public ActionListener actionListener = new ActionListener() {

public void onAction(String name, boolean keyPressed, float tpf) {
  if (name.equals("Move") && !keyPressed) {
    // 1. Reset results list.
    CollisionResults results = new CollisionResults();
    // 2. Aim the ray from cam loc to cam direction.
    Ray ray = new Ray(cam.getLocation(), cam.getDirection());
    // 3. Collect intersections between Ray and Shootables in results list.
    shootables.collideWith(ray, results);
    // 4. Print the results
    System.out.println("----- Collisions? " + results.size() + "-----");
    for (int i = 0; i < results.size(); i++) {
      // For each hit, we know distance, impact point, name of geometry.
      float dist = results.getCollision(i).getDistance();
      Vector3f pt = results.getCollision(i).getContactPoint();
      String hit = results.getCollision(i).getGeometry().getName();
      System.out.println("* Collision #" + i);
      System.out.println("  You shot " + hit + " at " + pt + ", " + dist + " wu away.");
    if (results.size() > 0) {
      // The closest collision point is what was truly hit:
      CollisionResult closest = results.getClosestCollision();
      // Let's interact - we mark the hit with a red dot.
     // rootNode.attachChild(mark);
   shoot = true;


/** A cube object for target practice */
protected Geometry makeCube(String name, float x, float y, float z) {
Box box = new Box(new Vector3f(x, y, z), 1, 1, 1);
Geometry cube = new Geometry(name, box);
Material mat1 = new Material(assetManager, “Common/MatDefs/Misc/Unshaded.j3md”);
mat1.setColor(“Color”, ColorRGBA.randomColor());
return cube;

/** A floor to show that the “shot” can go through several objects. */
protected Geometry makeFloor() {
Box box = new Box(new Vector3f(0, -4, -5), 15, .2f, 15);
Geometry floor = new Geometry(“the Floor”, box);
Material mat1 = new Material(assetManager, “Common/MatDefs/Misc/Unshaded.j3md”);
mat1.setColor(“Color”, ColorRGBA.Brown);
return floor;

/** A red ball that marks the last spot that was “hit” by the “shot”. */
protected void initMark() {
Sphere sphere = new Sphere(30, 30, 0.2f);
mark = new Geometry(“BOOM!”, sphere);
Material mark_mat = new Material(assetManager, “Common/MatDefs/Misc/Unshaded.j3md”);
mark_mat.setColor(“Color”, ColorRGBA.Red);
mark.setLocalTranslation(0, -3.8f, 0);

/** A centred plus sign to help the player aim. */
protected void initCrossHairs() {
guiFont = assetManager.loadFont(“Interface/Fonts/Default.fnt”);
BitmapText ch = new BitmapText(guiFont, false);
ch.setText("+"); // crosshairs
ch.setLocalTranslation( // center
settings.getWidth() / 2 - guiFont.getCharSet().getRenderedSize() / 3 * 2,
settings.getHeight() / 2 + ch.getLineHeight() / 2, 0);


public void simpleUpdate(float tpf)

  move = tpf*5.0f;
  vectry = cubechar.getWorldTranslation();
  vecmove = mark.getWorldTranslation();
   remainingDist = cubechar.getLocalTranslation().distance(vecmove);

   if (remainingDist > 0.05f && !cubechar.getWorldTranslation().equals(vecmove)){
   vectry2 = vectry.interpolate(vecmove, move/remainingDist);
   cubechar.lookAt(vecmove, Vector3f.UNIT_Y);
  else {
      if (remainingDist <= 0.02f && !cubechar.getWorldTranslation().equals(vecmove)) cubechar.setLocalTranslation(vecmove);




your scene has no lights, which are needed for “Lighting” materials (which is what the ninja has) the box that was there before was unshaded and did not need lights to be seen.

@icamefromspace said: your scene has no lights, which are needed for "Lighting" materials (which is what the ninja has) the box that was there before was unshaded and did not need lights to be seen.

thank you so much , now it works.