112 lines
3.4 KiB
C#
112 lines
3.4 KiB
C#
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//======= Copyright (c) Valve Corporation, All rights reserved. ===============
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//
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// Purpose: Drives a linear mapping based on position between 2 positions
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//
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//=============================================================================
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using UnityEngine;
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using System.Collections;
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using UnityEngine.Events;
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namespace Valve.VR.InteractionSystem
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{
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//-------------------------------------------------------------------------
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[RequireComponent(typeof(Interactable))]
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public class HoverButton : MonoBehaviour
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{
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public Transform movingPart;
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public Vector3 localMoveDistance = new Vector3(0, -0.1f, 0);
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[Range(0, 1)]
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public float engageAtPercent = 0.95f;
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[Range(0, 1)]
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public float disengageAtPercent = 0.9f;
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public HandEvent onButtonDown;
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public HandEvent onButtonUp;
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public HandEvent onButtonIsPressed;
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public bool engaged = false;
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public bool buttonDown = false;
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public bool buttonUp = false;
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private Vector3 startPosition;
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private Vector3 endPosition;
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private Vector3 handEnteredPosition;
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private bool hovering;
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private Hand lastHoveredHand;
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private void Start()
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{
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if (movingPart == null && this.transform.childCount > 0)
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movingPart = this.transform.GetChild(0);
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startPosition = movingPart.localPosition;
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endPosition = startPosition + localMoveDistance;
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handEnteredPosition = endPosition;
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}
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private void HandHoverUpdate(Hand hand)
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{
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hovering = true;
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lastHoveredHand = hand;
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bool wasEngaged = engaged;
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float currentDistance = Vector3.Distance(movingPart.parent.InverseTransformPoint(hand.transform.position), endPosition);
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float enteredDistance = Vector3.Distance(handEnteredPosition, endPosition);
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if (currentDistance > enteredDistance)
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{
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enteredDistance = currentDistance;
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handEnteredPosition = movingPart.parent.InverseTransformPoint(hand.transform.position);
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}
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float distanceDifference = enteredDistance - currentDistance;
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float lerp = Mathf.InverseLerp(0, localMoveDistance.magnitude, distanceDifference);
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if (lerp > engageAtPercent)
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engaged = true;
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else if (lerp < disengageAtPercent)
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engaged = false;
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movingPart.localPosition = Vector3.Lerp(startPosition, endPosition, lerp);
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InvokeEvents(wasEngaged, engaged);
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}
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private void LateUpdate()
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{
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if (hovering == false)
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{
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movingPart.localPosition = startPosition;
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handEnteredPosition = endPosition;
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InvokeEvents(engaged, false);
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engaged = false;
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}
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hovering = false;
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}
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private void InvokeEvents(bool wasEngaged, bool isEngaged)
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{
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buttonDown = wasEngaged == false && isEngaged == true;
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buttonUp = wasEngaged == true && isEngaged == false;
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if (buttonDown && onButtonDown != null)
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onButtonDown.Invoke(lastHoveredHand);
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if (buttonUp && onButtonUp != null)
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onButtonUp.Invoke(lastHoveredHand);
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if (isEngaged && onButtonIsPressed != null)
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onButtonIsPressed.Invoke(lastHoveredHand);
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}
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}
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}
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