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comparison Orchestland/Assets/LeapMotion/Widgets/Scripts/Physics/LeapPhysicsSpring.cs @ 1:f7675884f2a1

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Add Orchestland project
author Daiki OYAKAWA <e135764@ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2015 23:09:20 +0900
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0:347d21cdfc22 1:f7675884f2a1
1 using UnityEngine;
2
3 namespace LMWidgets
4 {
5 /// <summary>
6 /// Base class for spring. Restrains the widget in its local z-axis.
7 /// It will apply spring physics in ApplyPhysics and translate the button with hand in ApplyInteractions
8 /// </summary>
9 public abstract class LeapPhysicsSpring : LeapPhysicsBase
10 {
11 /// <summary>
12 /// Spring constant is separated to xyz-axis for more flexible configuration
13 /// </summary>
14 public Vector3 springCoefficient = Vector3.one * 10.0f;
15 public bool applyCriticalDamping = true;
16
17 private Vector3 m_dampingCoefficient = Vector3.zero;
18 private Vector3 m_interactionConstraints = Vector3.one;
19
20 /// <summary>
21 /// Applies Interaction constraints. Takes in a Vector3. If an axis has value > 0.5 then it's allowed to move. Otherwise it won't be
22 /// </summary>
23 /// <param name="interactionConstraints"></param>
24 protected void ApplyInteractionConstraints(Vector3 interactionConstraints)
25 {
26 interactionConstraints.x = (interactionConstraints.x > 0.5f) ? 1.0f : 0.0f;
27 interactionConstraints.y = (interactionConstraints.y > 0.5f) ? 1.0f : 0.0f;
28 interactionConstraints.z = (interactionConstraints.z > 0.5f) ? 1.0f : 0.0f;
29 m_interactionConstraints = interactionConstraints;
30 ResetPivots();
31 }
32
33 /// <summary>
34 /// Apply spring physics
35 /// </summary>
36 protected override void ApplyPhysics()
37 {
38 Vector3 springForce = Vector3.Scale(-springCoefficient, transform.localPosition);
39 Vector3 dampingForce = Vector3.zero;
40
41 if (applyCriticalDamping)
42 {
43 Vector3 instantVelocity = springForce * Time.deltaTime;
44 dampingForce = Vector3.Scale(-m_dampingCoefficient, instantVelocity);
45 }
46 transform.localPosition += (springForce + dampingForce) * Time.deltaTime;
47 }
48
49 /// <summary>
50 /// Translate the widget with the hand during interaction
51 /// </summary>
52 protected override void ApplyInteractions()
53 {
54 Vector3 displacement = Vector3.Scale(transform.parent.InverseTransformPoint(m_target.transform.position) - m_targetPivot, m_interactionConstraints);
55 transform.localPosition = displacement + m_pivot;
56 }
57
58 protected override void Awake()
59 {
60 base.Awake();
61 Vector3 k = springCoefficient;
62 m_dampingCoefficient = 2 * new Vector3(Mathf.Sqrt(k.x), Mathf.Sqrt(k.y), Mathf.Sqrt(k.z));
63 }
64 }
65 }