201 lines
8.5 KiB
C#
201 lines
8.5 KiB
C#
using System.Collections.Generic;
|
|
using UnityEngine.Events;
|
|
#if XR_HANDS_1_1_OR_NEWER
|
|
using UnityEngine.XR.Hands;
|
|
#endif
|
|
|
|
namespace UnityEngine.XR.Interaction.Toolkit.Samples.Hands
|
|
{
|
|
/// <summary>
|
|
/// Behavior that provides events for when an <see cref="XRHand"/> starts and ends a poke gesture. The gesture is
|
|
/// detected if the index finger is extended and the middle, ring, and little fingers are curled in.
|
|
/// </summary>
|
|
public class PokeGestureDetector : MonoBehaviour
|
|
{
|
|
[SerializeField]
|
|
[Tooltip("Which hand to check for the poke gesture.")]
|
|
#if XR_HANDS_1_1_OR_NEWER
|
|
Handedness m_Handedness;
|
|
#else
|
|
int m_Handedness;
|
|
#endif
|
|
|
|
[SerializeField]
|
|
[Tooltip("Called when the hand has started a poke gesture.")]
|
|
UnityEvent m_PokeGestureStarted;
|
|
|
|
[SerializeField]
|
|
[Tooltip("Called when the hand has ended a poke gesture.")]
|
|
UnityEvent m_PokeGestureEnded;
|
|
|
|
#if XR_HANDS_1_1_OR_NEWER
|
|
XRHandSubsystem m_Subsystem;
|
|
bool m_IsPoking;
|
|
|
|
static readonly List<XRHandSubsystem> s_Subsystems = new List<XRHandSubsystem>();
|
|
#endif
|
|
|
|
/// <summary>
|
|
/// See <see cref="MonoBehaviour"/>.
|
|
/// </summary>
|
|
protected void OnEnable()
|
|
{
|
|
#if XR_HANDS_1_1_OR_NEWER
|
|
SubsystemManager.GetSubsystems(s_Subsystems);
|
|
if (s_Subsystems.Count == 0)
|
|
return;
|
|
|
|
m_Subsystem = s_Subsystems[0];
|
|
m_Subsystem.updatedHands += OnUpdatedHands;
|
|
#else
|
|
Debug.LogError("Script requires XR Hands (com.unity.xr.hands) package. Install using Window > Package Manager or click Fix on the related issue in Edit > Project Settings > XR Plug-in Management > Project Validation.", this);
|
|
#endif
|
|
}
|
|
|
|
/// <summary>
|
|
/// See <see cref="MonoBehaviour"/>.
|
|
/// </summary>
|
|
protected void OnDisable()
|
|
{
|
|
#if XR_HANDS_1_1_OR_NEWER
|
|
if (m_Subsystem == null)
|
|
return;
|
|
|
|
m_Subsystem.updatedHands -= OnUpdatedHands;
|
|
m_Subsystem = null;
|
|
#endif
|
|
}
|
|
|
|
#if XR_HANDS_1_1_OR_NEWER
|
|
void OnUpdatedHands(XRHandSubsystem subsystem, XRHandSubsystem.UpdateSuccessFlags updateSuccessFlags, XRHandSubsystem.UpdateType updateType)
|
|
{
|
|
var wasPoking = m_IsPoking;
|
|
switch (m_Handedness)
|
|
{
|
|
case Handedness.Left:
|
|
if (!HasUpdateSuccessFlag(updateSuccessFlags, XRHandSubsystem.UpdateSuccessFlags.LeftHandJoints))
|
|
return;
|
|
|
|
var leftHand = subsystem.leftHand;
|
|
m_IsPoking = IsIndexExtended(leftHand) && IsMiddleGrabbing(leftHand) && IsRingGrabbing(leftHand) &&
|
|
IsLittleGrabbing(leftHand);
|
|
break;
|
|
case Handedness.Right:
|
|
if (!HasUpdateSuccessFlag(updateSuccessFlags, XRHandSubsystem.UpdateSuccessFlags.RightHandJoints))
|
|
return;
|
|
|
|
var rightHand = subsystem.rightHand;
|
|
m_IsPoking = IsIndexExtended(rightHand) && IsMiddleGrabbing(rightHand) && IsRingGrabbing(rightHand) &&
|
|
IsLittleGrabbing(rightHand);
|
|
break;
|
|
}
|
|
|
|
if (m_IsPoking && !wasPoking)
|
|
StartPokeGesture();
|
|
else if (!m_IsPoking && wasPoking)
|
|
EndPokeGesture();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Determines whether one or more bit fields are set in the flags.
|
|
/// Non-boxing version of <c>HasFlag</c> for <see cref="XRHandSubsystem.UpdateSuccessFlags"/>.
|
|
/// </summary>
|
|
/// <param name="successFlags">The flags enum instance.</param>
|
|
/// <param name="successFlag">The flag to check if set.</param>
|
|
/// <returns>Returns <see langword="true"/> if the bit field or bit fields are set, otherwise returns <see langword="false"/>.</returns>
|
|
static bool HasUpdateSuccessFlag(XRHandSubsystem.UpdateSuccessFlags successFlags, XRHandSubsystem.UpdateSuccessFlags successFlag)
|
|
{
|
|
return (successFlags & successFlag) == successFlag;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the given hand's index finger tip is farther from the wrist than the index intermediate joint.
|
|
/// </summary>
|
|
/// <param name="hand">Hand to check for the required pose.</param>
|
|
/// <returns>True if the given hand's index finger tip is farther from the wrist than the index intermediate joint, false otherwise.</returns>
|
|
static bool IsIndexExtended(XRHand hand)
|
|
{
|
|
if (!(hand.GetJoint(XRHandJointID.Wrist).TryGetPose(out var wristPose) &&
|
|
hand.GetJoint(XRHandJointID.IndexTip).TryGetPose(out var tipPose) &&
|
|
hand.GetJoint(XRHandJointID.IndexIntermediate).TryGetPose(out var intermediatePose)))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var wristToTip = tipPose.position - wristPose.position;
|
|
var wristToIntermediate = intermediatePose.position - wristPose.position;
|
|
return wristToTip.sqrMagnitude > wristToIntermediate.sqrMagnitude;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the given hand's middle finger tip is closer to the wrist than the middle proximal joint.
|
|
/// </summary>
|
|
/// <param name="hand">Hand to check for the required pose.</param>
|
|
/// <returns>True if the given hand's middle finger tip is closer to the wrist than the middle proximal joint, false otherwise.</returns>
|
|
static bool IsMiddleGrabbing(XRHand hand)
|
|
{
|
|
if (!(hand.GetJoint(XRHandJointID.Wrist).TryGetPose(out var wristPose) &&
|
|
hand.GetJoint(XRHandJointID.MiddleTip).TryGetPose(out var tipPose) &&
|
|
hand.GetJoint(XRHandJointID.MiddleProximal).TryGetPose(out var proximalPose)))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var wristToTip = tipPose.position - wristPose.position;
|
|
var wristToProximal = proximalPose.position - wristPose.position;
|
|
return wristToProximal.sqrMagnitude >= wristToTip.sqrMagnitude;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the given hand's ring finger tip is closer to the wrist than the ring proximal joint.
|
|
/// </summary>
|
|
/// <param name="hand">Hand to check for the required pose.</param>
|
|
/// <returns>True if the given hand's ring finger tip is closer to the wrist than the ring proximal joint, false otherwise.</returns>
|
|
static bool IsRingGrabbing(XRHand hand)
|
|
{
|
|
if (!(hand.GetJoint(XRHandJointID.Wrist).TryGetPose(out var wristPose) &&
|
|
hand.GetJoint(XRHandJointID.RingTip).TryGetPose(out var tipPose) &&
|
|
hand.GetJoint(XRHandJointID.RingProximal).TryGetPose(out var proximalPose)))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var wristToTip = tipPose.position - wristPose.position;
|
|
var wristToProximal = proximalPose.position - wristPose.position;
|
|
return wristToProximal.sqrMagnitude >= wristToTip.sqrMagnitude;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the given hand's little finger tip is closer to the wrist than the little proximal joint.
|
|
/// </summary>
|
|
/// <param name="hand">Hand to check for the required pose.</param>
|
|
/// <returns>True if the given hand's little finger tip is closer to the wrist than the little proximal joint, false otherwise.</returns>
|
|
static bool IsLittleGrabbing(XRHand hand)
|
|
{
|
|
if (!(hand.GetJoint(XRHandJointID.Wrist).TryGetPose(out var wristPose) &&
|
|
hand.GetJoint(XRHandJointID.LittleTip).TryGetPose(out var tipPose) &&
|
|
hand.GetJoint(XRHandJointID.LittleProximal).TryGetPose(out var proximalPose)))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
var wristToTip = tipPose.position - wristPose.position;
|
|
var wristToProximal = proximalPose.position - wristPose.position;
|
|
return wristToProximal.sqrMagnitude >= wristToTip.sqrMagnitude;
|
|
}
|
|
|
|
void StartPokeGesture()
|
|
{
|
|
m_IsPoking = true;
|
|
m_PokeGestureStarted.Invoke();
|
|
}
|
|
|
|
void EndPokeGesture()
|
|
{
|
|
m_IsPoking = false;
|
|
m_PokeGestureEnded.Invoke();
|
|
}
|
|
#endif
|
|
}
|
|
}
|