Class HandConstraint

Provides a solver that constrains the target to a region safe for hand constrained interactive content. This solver is intended to work with IMixedRealityHand but also works with IMixedRealityController.

Inheritance

Object

Solver

HandConstraint

HandConstraintPalmUp

Inherited Members

Solver.UpdateLinkedTransform

Solver.MoveLerpTime

Solver.RotateLerpTime

Solver.ScaleLerpTime

Solver.Smoothing

Solver.SolverHandler

Solver.GoalPosition

Solver.GoalRotation

Solver.GoalScale

Solver.WorkingPosition

Solver.WorkingRotation

Solver.WorkingScale

Solver.Awake()

Solver.Start()

Solver.OnDestroy()

Solver.SolverUpdateEntry()

Solver.SnapTo(Vector3, Quaternion, Vector3)

Solver.SnapGoalTo(Vector3, Quaternion, Vector3)

Solver.SnapTo(Vector3, Quaternion)

Solver.SnapGoalTo(Vector3, Quaternion)

Solver.AddOffset(Vector3)

Solver.SmoothTo(Vector3, Vector3, Single, Single)

Solver.SmoothTo(Quaternion, Quaternion, Single, Single)

Solver.UpdateTransformToGoal()

Solver.UpdateWorkingToGoal()

Solver.UpdateWorkingPositionToGoal()

Solver.UpdateWorkingRotationToGoal()

Solver.UpdateWorkingScaleToGoal()

Namespace: Microsoft.MixedReality.Toolkit.Utilities.Solvers

Assembly: cs.temp.dll.dll

Syntax

public class HandConstraint : Solver

Fields

handBounds

Declaration

protected HandBounds handBounds

Field Value

Type	Description
HandBounds

trackedController

Declaration

protected IMixedRealityController trackedController

Field Value

Type	Description
IMixedRealityController

Properties

HideHandCursorsOnActivate

When a hand is activated for tracking, should the cursor(s) be disabled on that hand?

Declaration

public bool HideHandCursorsOnActivate { get; set; }

Property Value

Type	Description
Boolean

OnFirstHandDetected

Event which is triggered when zero hands to one hand is tracked.

Declaration

public UnityEvent OnFirstHandDetected { get; set; }

Property Value

Type	Description
UnityEvent

OnHandActivate

Event which is triggered when a hand begins being tracked.

Declaration

public UnityEvent OnHandActivate { get; set; }

Property Value

Type	Description
UnityEvent

OnHandDeactivate

Event which is triggered when a hand stops being tracked.

Declaration

public UnityEvent OnHandDeactivate { get; set; }

Property Value

Type	Description
UnityEvent

OnLastHandLost

Event which is triggered when all hands are lost.

Declaration

public UnityEvent OnLastHandLost { get; set; }

Property Value

Type	Description
UnityEvent

RotationBehavior

Specifies how the solver should rotate when tracking the hand.

Declaration

public HandConstraint.SolverRotationBehavior RotationBehavior { get; set; }

Property Value

Type	Description
HandConstraint.SolverRotationBehavior

SafeZone

Which part of the hand to move the tracked object towards. The ulnar side of the hand is recommended for most situations.

Declaration

public HandConstraint.SolverSafeZone SafeZone { get; set; }

Property Value

Type	Description
HandConstraint.SolverSafeZone

SafeZoneBuffer

Additional offset to apply to the intersection point with the hand bounds.

Declaration

public float SafeZoneBuffer { get; set; }

Property Value

Type	Description
Single

UpdateWhenOppositeHandNear

Should the solver continue to move when the opposite hand (hand which is not being tracked) is near the tracked hand. This can improve stability when one hand occludes the other."

Declaration

public bool UpdateWhenOppositeHandNear { get; set; }

Property Value

Type	Description
Boolean

Methods

CalculateGoalPosition()

Performs a ray vs AABB test to determine where the solver can constrain the tracked object without intersection. The "safe zone" is calculated as if projected into the horizontal and vertical plane of the camera.

Declaration

protected virtual Vector3 CalculateGoalPosition()

Returns

Type	Description
Vector3	The new goal position.

CalculateGoalRotation()

Determines the solver's goal rotation based off of the SolverRotationBehavior.

Declaration

protected virtual Quaternion CalculateGoalRotation()

Returns

Type	Description
Quaternion	The new goal rotation.

IsOppositeHandNear(IMixedRealityController)

Performs an intersection test to see if the left hand is near the right hand or vice versa.

Declaration

protected virtual bool IsOppositeHandNear(IMixedRealityController controller)

Parameters

Type	Name	Description
IMixedRealityController	controller	The hand to check against.

Returns

Type	Description
Boolean	True, when hands are near each other.

IsValidController(IMixedRealityController)

Determines if a hand meets the requirements for use with constraining the tracked object.

Declaration

protected virtual bool IsValidController(IMixedRealityController controller)

Parameters

Type	Name	Description
IMixedRealityController	controller	The controller to check against.

Returns

Type	Description
Boolean	True if this hand should be used from tracking.

OnEnable()

Declaration

protected override void OnEnable()

Overrides

Solver.OnEnable()

SolverUpdate()

Should be implemented in derived classes, but Solver can be used to flush shared transform to real transform

Declaration

public override void SolverUpdate()

Overrides

Solver.SolverUpdate()

ToggleCursors(IMixedRealityController, Boolean, Boolean)

Enables/disables all cursors on the currently tracked hand.

Declaration

protected virtual IEnumerator ToggleCursors(IMixedRealityController controller, bool visible, bool frameDelay = false)

Parameters

Type	Name	Description
IMixedRealityController	controller	Controller target to search for pointers
Boolean	visible	Is the cursor visible?
Boolean	frameDelay	Delay one frame before performing the toggle to allow the pointers to instantiate their cursors.

Returns

Type	Description
IEnumerator