109 lines
4.7 KiB
C#
109 lines
4.7 KiB
C#
//-----------------------------------------------------------------------
|
|
// <copyright file="TwoFingerDragGestureRecognizer.cs" company="Google">
|
|
//
|
|
// Copyright 2018 Google Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
//
|
|
// </copyright>
|
|
//-----------------------------------------------------------------------
|
|
|
|
// Modifications copyright © 2020 Unity Technologies ApS
|
|
|
|
#if AR_FOUNDATION_PRESENT || PACKAGE_DOCS_GENERATION
|
|
|
|
using System;
|
|
using UnityEngine;
|
|
|
|
namespace UnityEngine.XR.Interaction.Toolkit.AR
|
|
{
|
|
/// <summary>
|
|
/// Gesture Recognizer for when the user performs a two finger drag motion on the touch screen.
|
|
/// </summary>
|
|
/// <inheritdoc />
|
|
public class TwoFingerDragGestureRecognizer : GestureRecognizer<TwoFingerDragGesture>
|
|
{
|
|
/// <summary>
|
|
/// Distance in inches a user's touches can drift from the start position
|
|
/// before the drag gesture is interpreted as started.
|
|
/// </summary>
|
|
public float slopInches { get; set; } = 0.1f;
|
|
|
|
/// <summary>
|
|
/// Maximum angle of the divergence between the paths of both fingers
|
|
/// for a two-finger drag gesture to be interpreted as started.
|
|
/// </summary>
|
|
public float angleThresholdRadians { get; set; } = Mathf.PI / 6;
|
|
|
|
// Preallocate delegates to avoid GC Alloc that would happen in TryCreateGestures
|
|
readonly Func<InputSystem.EnhancedTouch.Touch, InputSystem.EnhancedTouch.Touch, TwoFingerDragGesture> m_CreateEnhancedGesture;
|
|
readonly Func<Touch, Touch, TwoFingerDragGesture> m_CreateGestureFunction;
|
|
readonly Action<TwoFingerDragGesture, InputSystem.EnhancedTouch.Touch, InputSystem.EnhancedTouch.Touch> m_ReinitializeEnhancedGesture;
|
|
readonly Action<TwoFingerDragGesture, Touch, Touch> m_ReinitializeGestureFunction;
|
|
|
|
/// <summary>
|
|
/// Initializes and returns an instance of <see cref="TwoFingerDragGestureRecognizer"/>.
|
|
/// </summary>
|
|
public TwoFingerDragGestureRecognizer()
|
|
{
|
|
m_CreateEnhancedGesture = CreateEnhancedGesture;
|
|
m_CreateGestureFunction = CreateGesture;
|
|
m_ReinitializeEnhancedGesture = ReinitializeEnhancedGesture;
|
|
m_ReinitializeGestureFunction = ReinitializeGesture;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates a two finger drag gesture with the given touches.
|
|
/// </summary>
|
|
/// <param name="touch1">The first touch that started this gesture.</param>
|
|
/// <param name="touch2">The second touch that started this gesture.</param>
|
|
/// <returns>The created Two Finger Drag gesture.</returns>
|
|
TwoFingerDragGesture CreateGesture(Touch touch1, Touch touch2)
|
|
{
|
|
return new TwoFingerDragGesture(this, touch1, touch2);
|
|
}
|
|
|
|
static void ReinitializeGesture(TwoFingerDragGesture gesture, Touch touch1, Touch touch2)
|
|
{
|
|
gesture.Reinitialize(touch1, touch2);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates a two finger drag gesture with the given touches.
|
|
/// </summary>
|
|
/// <param name="touch1">The first touch that started this gesture.</param>
|
|
/// <param name="touch2">The second touch that started this gesture.</param>
|
|
/// <returns>The created Two Finger Drag gesture.</returns>
|
|
TwoFingerDragGesture CreateEnhancedGesture(InputSystem.EnhancedTouch.Touch touch1, InputSystem.EnhancedTouch.Touch touch2)
|
|
{
|
|
return new TwoFingerDragGesture(this, touch1, touch2);
|
|
}
|
|
|
|
static void ReinitializeEnhancedGesture(TwoFingerDragGesture gesture, InputSystem.EnhancedTouch.Touch touch1, InputSystem.EnhancedTouch.Touch touch2)
|
|
{
|
|
gesture.Reinitialize(touch1, touch2);
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
protected override void TryCreateGestures()
|
|
{
|
|
if (GestureTouchesUtility.touchInputSource == GestureTouchesUtility.TouchInputSource.Enhanced)
|
|
TryCreateTwoFingerGestureOnTouchBegan(m_CreateEnhancedGesture, m_ReinitializeEnhancedGesture);
|
|
else
|
|
TryCreateTwoFingerGestureOnTouchBegan(m_CreateGestureFunction, m_ReinitializeGestureFunction);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|