ChaseCamera turning

Troubleshooting graphics
1

Hi,



I have the following code:



public class ChaseCameraState extends BasicGameState {

   private Camera cam;
   private ChaseCamera chaser;

   // Moving Box
   private TriMesh box;

   public ChaseCameraState(Camera cam) {
      super("ChaseCameraState");
      this.cam = cam;

      init();
   }

   private void init() {
      loadCurves();
      initKeyBindings();
   }

   private void initKeyBindings() {
      KeyBindingManager.getKeyBindingManager().set("toggle_fly", KeyInput.KEY_F);
   }

   @Override
   public void update(float tpf) {
      super.update(tpf);
      if (chaser != null)
         chaser.update(tpf);

      if (KeyBindingManager.getKeyBindingManager().isValidCommand("toggle_fly", false)) {
         setTarget(box);
         rootNode.updateRenderState();
      }
   }

   public void setTarget(Spatial target) {
      if (chaser == null) {

         HashMap<String, Object> props = new HashMap<String, Object>();

         // props.put(ThirdPersonMouseLook.PROP_MINROLLOUT, "3");
         // props.put(ThirdPersonMouseLook.PROP_MAXASCENT, "" + 45 * FastMath.DEG_TO_RAD);
         // props.put(ChaseCamera.PROP_INITIALSPHERECOORDS, new Vector3f(5, 0, 30 * FastMath.DEG_TO_RAD));
         chaser = new ChaseCamera(cam, target, props);
         chaser.setWorldUpVec(new Vector3f(0, 0, 1));
         // chaser.setMaintainAzimuth(true);
         // chaser.setDampingK(0);
         // chaser.setStayBehindTarget(true);

         chaser.getMouseLook().setEnabled(false);
         chaser.setMaxDistance(4);
         chaser.setMinDistance(4);
         chaser.getMouseLook().setMaxRollOut(0);
         chaser.getMouseLook().setMinRollOut(0);
      } else {
         chaser.setTarget(target);

      }
   }

   private void loadCurves() {
      // create control Points
      Vector3f[] points = new Vector3f[3];
      points[0] = new Vector3f(70, -59, 52);
      points[1] = new Vector3f(30, -30, 46);
      points[2] = new Vector3f(-50, 0, 40);

      BezierCurve curve = new BezierCurve("Curve", points);

      box = new Quad("das", 1, 1);
      box.setModelBound(new BoundingSphere());
      box.updateModelBound();

      box.setLocalTranslation(new Vector3f(points[0]));

      CurveController cc = new CurveController(curve, box);
      box.addController(cc);
      cc.setAutoRotation(true);
      cc.setRepeatType(Controller.RT_CLAMP);
      cc.setUpVector(new Vector3f(0, 0, 1));
      cc.setSpeed(0.5f);

      this.getRootNode().attachChild(box);
      this.getRootNode().attachChild(curve);
   }
}



My goal is that the camera follows the quad, but at reaching the end of the line not to turn around.
So backwards the camera looks at the same direction like forwards. Tried alot of the things you
see in the code. But nothing works, any ideas?
2

There is a mistake in the code:



The repeat Type is not RT_CLAMP, it is RT_CYCLE

cc.setRepeatType(Controller.RT_CYCLE);



Here a test main Method:


   public static void main(String args[]) {
      StandardGame game = new StandardGame("chaseCamTest");
      game.start();
      
      GameStateManager.create();
      ChaseCameraState state = new ChaseCameraState(game.getCamera());
      DebugGameState deb = new DebugGameState();
      GameStateManager.getInstance().attachChild(deb);
      GameStateManager.getInstance().attachChild(state);
      deb.setActive(true);
      state.setActive(true);

      Box b = new Box("EnvBox", new Vector3f(0, 0, 0), new Vector3f(200, 200, 200));
      b.setLocalTranslation(-100, -120, -50);
      b.setRandomColors();
      deb.getRootNode().attachChild(b);
      deb.getRootNode().updateRenderState();
      state.getRootNode().updateRenderState();
   }



Hope somebody have an idea.
3

hmm i tried it but i don't know if its possible with the jme ChaseCamera.

I would probably just create a custom ChaseCam which does exactly what you want.