Class MultiTapInteraction

Interaction that requires multiple taps (press and release within tapTime) spaced no more than tapDelay seconds apart. This equates to a chain of TapInteraction with a maximum delay between each tap.

Inheritance
Object
MultiTapInteraction
Namespace: UnityEngine.InputSystem.Interactions
Syntax
[Preserve]
public class MultiTapInteraction : IInputInteraction<float>, IInputInteraction
Remarks

The interaction goes into Started on the first press and then will not trigger again until either the full tap sequence is performed (in which case the interaction triggers Performed) or the multi-tap is aborted by a timeout being hit (in which case the interaction will trigger Canceled).

Fields

pressPoint

Magnitude threshold that must be crossed by an actuated control for the control to be considered pressed.

Declaration
public float pressPoint
Field Value
Type Description
Single
Remarks

If this is less than or equal to 0 (the default), defaultButtonPressPoint is used instead.

See Also

tapCount

The number of taps required to perform the interaction.

Declaration
[Tooltip("How many taps need to be performed in succession. Two means double-tap, three means triple-tap, and so on.")]
public int tapCount
Field Value
Type Description
Int32
Remarks

How many taps need to be performed in succession. Two means double-tap, three means triple-tap, and so on.

tapDelay

The time in seconds which is allowed to pass between taps.

Declaration
[Tooltip("The maximum delay (in seconds) allowed between each tap. If this time is exceeded, the multi-tap is canceled.")]
public float tapDelay
Field Value
Type Description
Single
Remarks

If this time is exceeded, the multi-tap interaction is canceled. If this value is equal to or smaller than zero, the input system will use the duplicate value of tapTime instead.

tapTime

The time in seconds within which the control needs to be pressed and released to perform the interaction.

Declaration
[Tooltip("The maximum time (in seconds) allowed to elapse between pressing and releasing a control for it to register as a tap.")]
public float tapTime
Field Value
Type Description
Single
Remarks

If this value is equal to or smaller than zero, the input system will use (defaultTapTime) instead.

Methods

Process(ref InputInteractionContext)

Perform processing of the interaction in response to input.

Declaration
public void Process(ref InputInteractionContext context)
Parameters
Type Name Description
InputInteractionContext context
Implements
Remarks

This method is called whenever a control referenced in the binding that the interaction sits on changes value. The interaction is expected to process the value change and, if applicable, call Started() and/or its related methods to initiate a state change.

Note that if "control disambiguation" (i.e. the process where if multiple controls are bound to the same action, the system decides which control gets to drive the action at any one point) is in effect -- i.e. when either Button or Value are used but not if PassThrough is used -- inputs that the disambiguation chooses to ignore will cause this method to not be called.

Note that this method is called on the interaction even when there are multiple interactions and the interaction is not the one currently in control of the action (because another interaction that comes before it in the list had already started the action). Each interaction will get processed independently and the action will decide when to use which interaction to drive the action as a whole.

    // Processing for an interaction that will perform the action only if a control
    // is held at least at 3/4 actuation for at least 1 second.
    public void Process(ref InputInteractionContext context)
    {
        var control = context.control;

        // See if we're currently tracking a control.
        if (m_Control != null)
        {
            // Ignore any input on a control we're not currently tracking.
            if (m_Control != control)
                return;

            // Check if the control is currently actuated past our 3/4 threshold.
            var isStillActuated = context.ControlIsActuated(0.75f);

            // See for how long the control has been held.
            var actuationTime = context.time - context.startTime;

            if (!isStillActuated)
            {
                // Control is no longer actuated above 3/4 threshold. If it was held
                // for at least a second, perform the action. Otherwise cancel it.

                if (actuationTime >= 1)
                    context.Performed();
                else
                    context.Cancelled();
            }

            // Control changed value somewhere above 3/4 of its actuation. Doesn't
            // matter to us so no change.
        }
        else
        {
            // We're not already tracking a control. See if the control that just triggered
            // is actuated at least 3/4th of its way. If so, start tracking it.

            var isActuated = context.ControlIsActuated(0.75f);
            if (isActuated)
            {
                m_Control = context.control;
                context.Started();
            }
        }
    }

    InputControl m_Control;

    public void Reset()
    {
        m_Control = null;
    }

Reset()

Reset state that the interaction may hold. This should put the interaction back in its original state equivalent to no input yet having been received.

Declaration
public void Reset()
Implements