Find out whether the hand is seen at the edge of the Leap camera?

TobiasW 2016-04-14 14:15:28 UTC #1

We are using the Leap with the Oculus Rift and found that the hand sometimes gets rotated too much when the player turns their head away. To deal with that, we would like to know how close the hand is to the edge of the Leap camera. Is there any way to find out? I know that I could calculate it according to hand position/distance and Oculus rotation, but I would prefer a more direct Leap SDK method.

I'm using the Orion SDK in Unity3D 5.

Joe_Ward 2016-04-14 23:06:23 UTC #2

The only relevant APIs are the Device horizontal and vertical field of view angles. Assuming that the Leap is mounted to the headset, you can calculate the x and y angles of the hand object to the camera and compare those values to the fov angles.

TobiasW 2016-04-25 12:54:44 UTC #3

Thanks! Is there any way to get the Leap position from the SDK itself? I would like to be able to test without putting the headset on.

Joe_Ward 2016-04-25 17:11:03 UTC #4

The position of the Leap device? In the Leap Motion coordinate system, it is always at (0,0,0). In Unity, it is at the position of the LeapHandController.

TobiasW 2016-04-27 23:30:05 UTC #5

Ah, right. I was wondering if I should get the hand angle from the Leap device position instead of the camera, but it kind of slipped my mind that those are more-or-less the same. Thanks!