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gary.frewin's avatar
gary.frewin
Explorer
5 years ago
Solved

Bones list is empty

Hi Folks,

 

Two questions:

1. My list of bones is always empty. 

I have an OVRhandprefab stored in a variable called skeleton. But when I call skeleton.Bones in my start method it always has a count of zero. So, I can't get a list of anything. 

(this is from the valem gesture detection tutorial)

 

2. I want to get the position of the tip of the right hand at one point in my code. How do I reference  this? 

 

Thanks

 

  • Anonymous's avatar
    Anonymous
    5 years ago

    You have to wait until the OVRSkeleton's Initialize method has finished before you can get the bones. The simplest way to do that is wait a frame before getting the bones. Since the Start method can be turned into a coroutine you can do that like this:

     

    public class GetBones : MonoBehaviour {
    private OVRSkeleton skeleton;
    private Transform indexTipTransform;

    // Start is called before the first frame update
    IEnumerator Start() {
        skeleton = GetComponent<OVRSkeleton>();

        while (skeleton.Bones.Count == 0) {
            yield return null;
        }

        foreach (var bone in skeleton.Bones) {
            if (bone.Id == OVRSkeleton.BoneId.Hand_IndexTip) {
                indexTipTransform = bone.Transform;
            }
        }
    }
}

     

    Then if there's a particular part of the hand to you to get the position of you look for the bone.Id in the Bones list and store that part's transform (the foreach part above).

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  • Anonymous's avatar
    Anonymous
    5 years ago

    You have to wait until the OVRSkeleton's Initialize method has finished before you can get the bones. The simplest way to do that is wait a frame before getting the bones. Since the Start method can be turned into a coroutine you can do that like this:

     

    public class GetBones : MonoBehaviour {
    private OVRSkeleton skeleton;
    private Transform indexTipTransform;

    // Start is called before the first frame update
    IEnumerator Start() {
        skeleton = GetComponent<OVRSkeleton>();

        while (skeleton.Bones.Count == 0) {
            yield return null;
        }

        foreach (var bone in skeleton.Bones) {
            if (bone.Id == OVRSkeleton.BoneId.Hand_IndexTip) {
                indexTipTransform = bone.Transform;
            }
        }
    }
}

     

    Then if there's a particular part of the hand to you to get the position of you look for the bone.Id in the Bones list and store that part's transform (the foreach part above).