63 lines
1.8 KiB
C#
63 lines
1.8 KiB
C#
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.EventSystems;
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namespace SimpleInputNamespace
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{
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[RequireComponent( typeof( SimpleInputMultiDragListener ) )]
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public class AxisInputPinchGesture : MonoBehaviour, ISimpleInputDraggableMultiTouch
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{
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public SimpleInput.AxisInput axis = new SimpleInput.AxisInput();
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public float sensitivity = 1f;
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public bool invertValue;
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private SimpleInputMultiDragListener eventReceiver;
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public int Priority { get { return 2; } }
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private void Awake()
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{
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eventReceiver = GetComponent<SimpleInputMultiDragListener>();
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}
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private void OnEnable()
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{
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eventReceiver.AddListener( this );
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axis.StartTracking();
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}
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private void OnDisable()
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{
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eventReceiver.RemoveListener( this );
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axis.StopTracking();
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}
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public bool OnUpdate( List<PointerEventData> mousePointers, List<PointerEventData> touchPointers, ISimpleInputDraggableMultiTouch activeListener )
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{
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axis.value = 0f;
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if( activeListener != null && activeListener.Priority > Priority )
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return false;
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if( touchPointers.Count < 2 )
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{
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if( ReferenceEquals( activeListener, this ) && touchPointers.Count == 1 )
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touchPointers[0].pressPosition = touchPointers[0].position;
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return false;
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}
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PointerEventData touch1 = touchPointers[touchPointers.Count - 1];
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PointerEventData touch2 = touchPointers[touchPointers.Count - 2];
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float pinchAmount = ( touch2.delta - touch1.delta ).magnitude;
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bool zoomingOut = ( touch2.position - touch1.position ).sqrMagnitude < ( ( touch2.position - touch2.delta ) - ( touch1.position - touch1.delta ) ).sqrMagnitude;
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if( invertValue != zoomingOut )
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pinchAmount = -pinchAmount;
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axis.value = pinchAmount * sensitivity * SimpleInputUtils.ResolutionMultiplier;
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return true;
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}
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}
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}
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