FrameInformation fetchFrameInformation()
{
FrameInformation frameInfo = new FrameInformation();
frameInfo.grabHeld = grabHeld;
frameInfo.pinchHeld = pinchHeld;
foreach (Leap.Finger f in hand.Fingers)
{
FingerInformation fingerInfo = new FingerInformation();
fingerInfo.isExtended = f.IsExtended;
fingerInfo.direction = f.Direction.ToVector3();
fingerInfo.padDirection = Vector3.Cross(fingerInfo.direction, Vector3.Cross(fingerInfo.direction, f.bones[1].Direction.ToVector3()));
fingerInfo.tipPosition = f.TipPosition.ToVector3();
fingerInfo.tipVelocity = f.TipVelocity.ToVector3();
switch (f.Type)
{
case Leap.Finger.FingerType.TYPE_INDEX:
frameInfo.index = fingerInfo;
break;
case Leap.Finger.FingerType.TYPE_MIDDLE:
frameInfo.middle = fingerInfo;
break;
case Leap.Finger.FingerType.TYPE_RING:
frameInfo.ring = fingerInfo;
break;
case Leap.Finger.FingerType.TYPE_PINKY:
frameInfo.pinky = fingerInfo;
break;
case Leap.Finger.FingerType.TYPE_THUMB:
frameInfo.thumb = fingerInfo;
break;
}
}
if (handedness == "Right")
{
hand = Hands.Right;
}
else
{
hand = Hands.Left;
}
HandInformation handInfo = new HandInformation();
handInfo.direction = hand.Direction.ToVector3();
handInfo.pitch = hand.Direction.Pitch;
handInfo.roll = hand.Direction.Roll;
handInfo.yaw = hand.Direction.Yaw;
handInfo.palmPosition = hand.PalmPosition.ToVector3();
handInfo.palmVelocity = hand.PalmVelocity.ToVector3();
handInfo.palmNormal = hand.PalmNormal.ToVector3();
handInfo.rotation = hand.Rotation.ToQuaternion();
frameInfo.hand = handInfo;
return(frameInfo);
}
//Checks for a tap gesture, uses previous frame information.
public bool checkTap(Queue <FrameInformation> frameQueue, Leap.Hand hand)
{
//Do not want ring or pinky extended when tapping.
if (Hands.GetRing(hand).IsExtended || Hands.GetPinky(hand).IsExtended)
{
return(false);
}
int count = frameQueue.Count;
if (count < 11)
{
return(false);
}
FrameInformation[] fArr = frameQueue.ToArray();
float[] sharpness = new float[count];
float[] padvel = new float[count];
float[] accelMag = new float[count];
for (int i = 1; i < count - 1; ++i)
{
FingerInformation p = fArr[i - 1].index;
FingerInformation n = fArr[i + 1].index;
FingerInformation v = fArr[i].index;
//Vector3 jerk = (n.tipVelocity - v.tipVelocity) - (v.tipVelocity - p.tipVelocity);
//jerk = Vector3.Project(jerk, fArr[i].index.padDirection);
//Fetch magnitude of acceleration of recent frames as well as pad velocity and sharpness
Vector3 accel = (n.tipVelocity - p.tipVelocity);
Vector3.Project(accel, fArr[i].index.padDirection);
accelMag[i] = Vector3.Project(accel, fArr[i].index.padDirection).magnitude;
accelMag[i] *= Mathf.Sign(Vector3.Dot(accel, fArr[i].index.padDirection));
padvel[i] = Vector3.Project(v.tipVelocity, fArr[i].index.padDirection).magnitude;
padvel[i] *= Mathf.Sign(Vector3.Dot(v.tipVelocity, fArr[i].index.padDirection));
sharpness[i] = Vector3.Angle(v.tipPosition - p.tipPosition, n.tipPosition - v.tipPosition) * accel.sqrMagnitude;
}
/*if (sharpness[count - 2] > 20f && sharpness[count - 1] < sharpness[count - 2] && sharpness[count - 3] < sharpness[count - 2]
* && fArr[count-2].index.isExtended
* && accelMag[count-2] > 0)*/
//Checks to see if a tap existed in this frame.
if (accelMag[count - 2] < -.5f && accelMag[count - 3] > accelMag[count - 2] && accelMag[count - 1] > accelMag[count - 2])
{
return(true);
}
else
{
return(false);
}
}