// estimate the next state and completeness of the gesture
public static void CheckForGesture(ref ExtraGestureData gestureData, float timestamp, LeapManager leapManager)
{
if(gestureData.complete || !leapManager)
return;
switch(gestureData.gesture)
{
// check for Fist
case ExtraGestures.Fist:
switch(gestureData.state)
{
case 0: // gesture detection - phase 1
if(leapManager.IsHandValid() && leapManager.GetFingersCount() > 1)
{
SetGestureJoint(ref gestureData, timestamp, true, leapManager.GetHandID(), leapManager.GetHandPos());
gestureData.tagFloat = leapManager.GetThumbID();
gestureData.screenPos = leapManager.GetCursorNormalizedPos();
gestureData.progress = 0.3f;
}
break;
case 1: // gesture phase 2 - complete
if(leapManager.IsHandValid())
{
// check for stay-in-place
Vector3 jointPos = leapManager.GetHandPos();
bool bHandMatch = (leapManager.GetHandID() == gestureData.jointId);
bool bThumbMatch = leapManager.GetFingersCount() > 0 ? (leapManager.GetThumbID() == (int)gestureData.tagFloat) : true;
if(bHandMatch && bThumbMatch)
{
if(leapManager.GetFingersCount() <= 1)
{
gestureData.screenPos = leapManager.GetCursorNormalizedPos();
CheckPoseComplete(ref gestureData, timestamp, jointPos, true, Constants.PoseCompleteDuration);
}
}
else
{
// hand or thumb don´t match
SetGestureCancelled(ref gestureData);
}
// Debug.Log(gestureData.complete.ToString() + " GestID: " + gestureData.jointId +
// " Fingers: " + leapManager.GetFingersCount() +
// " ThumbID: " + leapManager.GetThumbID().ToString());
}
break;
}
break;
// check for Click
case ExtraGestures.Click:
switch(gestureData.state)
{
case 0: // gesture detection - phase 1
if(leapManager.IsHandValid())
{
SetGestureJoint(ref gestureData, timestamp, true, leapManager.GetHandID(), leapManager.GetHandPos());
gestureData.screenPos = leapManager.GetCursorNormalizedPos();
gestureData.progress = 0.3f;
}
break;
case 1: // gesture phase 2 - complete
if(leapManager.IsHandValid())
{
// check for stay-in-place
Vector3 jointPos = leapManager.GetHandPos();
Vector3 distVector = jointPos - gestureData.jointPos;
bool isInPose = leapManager.GetHandID() == gestureData.jointId &&
distVector.magnitude < 0.05f;
CheckPoseComplete(ref gestureData, timestamp, jointPos, isInPose, Constants.ClickStayDuration);
}
break;
}
break;
// check for HandSwipe
case ExtraGestures.HandSwipe:
switch(gestureData.state)
{
case 0: // gesture detection - phase 1
if(leapManager.IsHandValid())
{
SetGestureJoint(ref gestureData, timestamp, true, leapManager.GetHandID(), leapManager.GetHandPos());
gestureData.screenPos = leapManager.GetCursorNormalizedPos();
gestureData.progress = 0.5f;
}
break;
case 1: // gesture phase 2 - complete
if((timestamp - gestureData.timestamp) < 1.5f)
{
if(leapManager.IsHandValid())
{
Vector3 jointPos = leapManager.GetHandPos();
Vector3 distVector = jointPos - gestureData.jointPos;
bool isInPose = leapManager.GetHandID() == gestureData.jointId &&
distVector.magnitude > 0.15f;
if(isInPose)
{
CheckPoseComplete(ref gestureData, timestamp, jointPos, isInPose, 0f);
}
}
}
else
{
// cancel the gesture
SetGestureCancelled(ref gestureData);
}
break;
}
break;
}
// here come more gesture-cases
}
private static void SetGestureCancelled(ref ExtraGestureData gestureData)
{
gestureData.state = 0;
gestureData.progress = 0f;
gestureData.cancelled = true;
}
private static void SetGestureJoint(ref ExtraGestureData gestureData, float timestamp,bool jointIsHand, int jointId, Vector3 jointPos)
{
gestureData.jointIsHand = jointIsHand;
gestureData.jointId = jointId;
gestureData.jointPos = jointPos;
gestureData.timestamp = timestamp;
gestureData.state++;
}
private static void CheckPoseComplete(ref ExtraGestureData gestureData, float timestamp, Vector3 jointPos, bool isInPose, float durationToComplete)
{
if(isInPose)
{
float timeLeft = timestamp - gestureData.timestamp;
gestureData.progress = durationToComplete > 0f ? Mathf.Clamp01(timeLeft / durationToComplete) : 1.0f;
if(timeLeft >= durationToComplete)
{
gestureData.completeTime = timestamp - gestureData.timestamp;
gestureData.gestureDir = jointPos - gestureData.jointPos;
gestureData.timestamp = timestamp;
gestureData.jointPos = jointPos;
gestureData.state++;
gestureData.complete = true;
}
}
else
{
SetGestureCancelled(ref gestureData);
}
}
