How do I move objects with Leap Motion without having the hands appear in the scene?

[funsms]

Hello everyone!
So I'm developing a game in Unity using the Leap Motion Controller. It is going to be an Air Hockey game and I want to move one of the Paddles with the Leap Motion.

Unfortunately I'm pretty new to programming (learning programming in C# for almost 4 weeks now), so the scripts that come with Leap killed my understanding of code a bit. It was pretty overwhelming...

Maybe somebody of you guys can tell me how to move an object with Leap without having the hands appear in the scene.

Thanks in advance and have a nice day!
Cheers Felix

[IsrtvanLucario]

using UnityEngine;
using System.Collections;
using Leap;

public class LeapHandController : MonoBehaviour {

public GameObject Palm;
public GameObject Palm2;
Controller LEAPcontroller;
Frame      frame;
HandList   Hands;
Hand       hand;
Vector3    PalmPosition;
public bool tierra=true;
public static int Nsaltos;


void Start ()
{
    LEAPcontroller = new Controller ();
    if (LEAPcontroller.IsConnected) {
        Debug.Log ("LEAP connected!");
    } else {
        Debug.Log ("LEAP is NOT connected!");
    }
}

void FixedUpdate()
{
    frame = LEAPcontroller.Frame();
    Hands = frame.Hands;
    if (Hands.Count == 0 || Hands.Count > 1) {
        return;
    }
    PalmPosition = Hands [0].PalmPosition.ToUnity ();

        //Palm.gameObject.transform.position = PalmPosition * 1 ;
    Palm.gameObject.transform.up=(PalmPosition* 1 * Time.deltaTime);

    LEAPcontroller.EnableGesture(Gesture.GestureType.TYPE_CIRCLE);
    LEAPcontroller.EnableGesture(Gesture.GestureType.TYPE_KEY_TAP);
    LEAPcontroller.EnableGesture(Gesture.GestureType.TYPE_SWIPE);
    GestureList gesturesInFrame = frame.Gestures();
    if (!gesturesInFrame.IsEmpty) {
        foreach (Gesture gesture in gesturesInFrame) {
            switch (gesture.Type) {
            case Gesture.GestureType.TYPECIRCLE:
                Debug.Log ("circle");
            //    Palm.gameObject.transform.=PalmPosition * 50;
                break;
            case Gesture.GestureType.TYPEKEYTAP:
                Debug.Log ("key");
                if(Nsaltos==0){
                Palm2.gameObject.transform.position +=Vector3.up * 1;
                    Nsaltos=1;
                }
                break;
            case Gesture.GestureType.TYPESCREENTAP:
                Debug.Log ("screen");
                break;
            case Gesture.GestureType.TYPESWIPE:
                Debug.Log ("swipe");
                break;
            default:
                Debug.Log ("nada");
                break;
            }
        }
    }


    }

}

[angelicpyro143]

is this a new script or can i find it in the assets leap motion gives you??

Idc if the hands are in the shot i just want to move a sphere with my hand orientation

[Joe_Ward]

That isn't one of the Leap Motion scripts. To do what you want, you can use something like this:

using UnityEngine;
using System.Collections;
using Leap;

public class MatchHand : MonoBehaviour {

//Assume a reference to the scene HandController object
public HandController handCtrl;

void Update(){
	Frame frame = handCtrl.GetFrame();
	Hand hand = frame.Hands.Frontmost;
	if(hand.IsValid) {
	  transform.position = 
		handCtrl.transform.TransformPoint(hand.PalmPosition.ToUnityScaled());
	  transform.rotation = 
		handCtrl.transform.rotation * hand.Basis.Rotation(false);
	}
	}
}

This moves the object to which it is attached to the position of your hand over the Leap Motion hardware. Units are in millimeters, so unless the object is close to the camera in your scene (as would probably be the case in VR/AR), you will have to scale up the position to see appreciable movement. The rotation of the object is also set to match your hand.

This requires a HandController object from the Leap Motion core assets. You can just set the hand models to None if you don't want them to appear. (This can be done easily without the Core assets at all, but you would have to define the ToUnityScaled() and Rotation() extensions used to convert from the Leap Motion frame of reference to the Unity frame of reference.)

[angelicpyro143]

Where you put transform, would that be referring to an object that I wanna control? Thats how it appears to me I just wanna make sure

[Joe_Ward]

Yes. This script assumes it is attached to the object that you want to control. To control a different object, you could specify a reference to that object's transform instead.

[angelicpyro143]

Thank you

One last question.... When I am trying to make a frame and what not I keep getting: NULLReferenceException Object not set to an instance of an object...

It keeps pointing too the line where frame is made

Frame frame = handCtrl.GetFrame();

[angelicpyro143]

Nevermind I fixed it....Its complaining about mesh triangles but it works

Thank you

[hdiez]

And how would this be done with Orion? I find many of the previous functiones don't work now.
Any help is really appreciated.
Thanks.

[jesusrg]

I need this working with orion, how can i access frame.getframe() and hands.frontmost, etc.
Thanks.
Best regards.
Jesus.

[Joe_Ward]

For information on how to get tracking frames in an Unity script, please see the documentation.

Note that the Hands.Frontmost API no longer exists in Orion. If you need that feature, it is easy enough to write yourself. All the old function did was compare the z-coordinates of all hands in the frame and return the farthest forward. Of course, this is a less well defined problem in VR since the Leap device is not stationary so the definition of forward needs to be considered too.

[rtanwar616]

can anyone tell me what is to be done with the first and second code ?
i also wanna do the same thing as mentioned above but cant figure out how have out guy done it .