1 using System;
2 using UnityEngine;
3 using UnityEngine.EventSystems;
4
5 namespace UnityStandardAssets.CrossPlatformInput
6 {
7 public class Joystick : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler
8 {
9 public enum AxisOption
10 {
11 // Options for which axes to use
12 Both, // Use both
13 OnlyHorizontal, // Only horizontal
14 OnlyVertical // Only vertical
15 }
16
17 public int MovementRange = 100;
18 public AxisOption axesToUse = AxisOption.Both; // The options for the axes that the still will use
19 public string horizontalAxisName = "Horizontal"; // The name given to the horizontal axis for the cross platform input
20 public string verticalAxisName = "Vertical"; // The name given to the vertical axis for the cross platform input
21
22 Vector3 m_StartPos;
23 bool m_UseX; // Toggle for using the x axis
24 bool m_UseY; // Toggle for using the Y axis
25 CrossPlatformInputManager.VirtualAxis m_HorizontalVirtualAxis; // Reference to the joystick in the cross platform input
26 CrossPlatformInputManager.VirtualAxis m_VerticalVirtualAxis; // Reference to the joystick in the cross platform input
27
28 void OnEnable()
29 {
30 CreateVirtualAxes();
31 }
32
33 void Start()
34 {
35 m_StartPos = transform.position;
36 }
37
38 void UpdateVirtualAxes(Vector3 value)
39 {
40 var delta = m_StartPos - value;
41 delta.y = -delta.y;
42 delta /= MovementRange;
43 if (m_UseX)
44 {
45 m_HorizontalVirtualAxis.Update(-delta.x);
46 }
47
48 if (m_UseY)
49 {
50 m_VerticalVirtualAxis.Update(delta.y);
51 }
52 }
53
54 void CreateVirtualAxes()
55 {
56 // set axes to use
57 m_UseX = (axesToUse == AxisOption.Both || axesToUse == AxisOption.OnlyHorizontal);
58 m_UseY = (axesToUse == AxisOption.Both || axesToUse == AxisOption.OnlyVertical);
59
60 // create new axes based on axes to use
61 if (m_UseX)
62 {
63 m_HorizontalVirtualAxis = new CrossPlatformInputManager.VirtualAxis(horizontalAxisName);
64 CrossPlatformInputManager.RegisterVirtualAxis(m_HorizontalVirtualAxis);
65 }
66 if (m_UseY)
67 {
68 m_VerticalVirtualAxis = new CrossPlatformInputManager.VirtualAxis(verticalAxisName);
69 CrossPlatformInputManager.RegisterVirtualAxis(m_VerticalVirtualAxis);
70 }
71 }
72
73
74 public void OnDrag(PointerEventData data)
75 {
76 Vector3 newPos = Vector3.zero;
77
78 if (m_UseX)
79 {
80 int delta = (int)(data.position.x - m_StartPos.x);
81 delta = Mathf.Clamp(delta, - MovementRange, MovementRange);
82 newPos.x = delta;
83 }
84
85 if (m_UseY)
86 {
87 int delta = (int)(data.position.y - m_StartPos.y);
88 delta = Mathf.Clamp(delta, -MovementRange, MovementRange);
89 newPos.y = delta;
90 }
91 transform.position = new Vector3(m_StartPos.x + newPos.x, m_StartPos.y + newPos.y, m_StartPos.z + newPos.z);
92 UpdateVirtualAxes(transform.position);
93 }
94
95
96 public void OnPointerUp(PointerEventData data)
97 {
98 transform.position = m_StartPos;
99 UpdateVirtualAxes(m_StartPos);
100 }
101
102
103 public void OnPointerDown(PointerEventData data) { }
104
105 void OnDisable()
106 {
107 // remove the joysticks from the cross platform input
108 if (m_UseX)
109 {
110 m_HorizontalVirtualAxis.Remove();
111 }
112 if (m_UseY)
113 {
114 m_VerticalVirtualAxis.Remove();
115 }
116 }
117 }
118 }
