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annotate Orchestland/Assets/LeapMotion/DemoResources/Scripts/AerodynamicLeaf.cs @ 3:0030a1b971fb default tip

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author Yuta ANSE <e135745@ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2015 23:23:43 +0900
parents f7675884f2a1
children
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1
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1 /******************************************************************************\
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2 * Copyright (C) Leap Motion, Inc. 2011-2014. *
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3 * Leap Motion proprietary. Licensed under Apache 2.0 *
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4 * Available at http://www.apache.org/licenses/LICENSE-2.0.html *
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5 \******************************************************************************/
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6
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7 using UnityEngine;
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8 using System.Collections;
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9
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10 public class AerodynamicLeaf : MonoBehaviour {
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11
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12 public float airDragForce = 0.2f;
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13 public float airDragTorque = 0.001f;
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14
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15 // Air to water transition level.
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16 public float waterHeight = 0.0f;
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17 public float transitionWidth = 0.2f;
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18
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19 // Water drag.
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20 public float waterDrag = 5.0f;
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21 public float waterAngularDrag = 10.0f;
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22
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23 // Water forces.
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24 public float waterBuoancyForce = 0.1f;
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25 public float waterDragTorque = 0.002f;
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26 public float waterDragForce = 0.002f;
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27 public float waterSurfaceTorque = 0.002f;
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28
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29 // Water curent.
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30 public Vector3 waterCurrentVelocity;
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31 public float waterCurrentForce = 0.1f;
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32
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33 private float air_drag_;
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34 private float air_angular_drag_;
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35 private float drag_force_;
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36 private float drag_torque_;
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37
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38 void Start() {
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39 air_drag_ = GetComponent<Rigidbody>().drag;
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40 air_angular_drag_ = GetComponent<Rigidbody>().angularDrag;
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41 drag_force_ = airDragForce;
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42 drag_torque_ = airDragTorque;
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43 }
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44
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45 void DragUpdate() {
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46 Vector3 velocity = GetComponent<Rigidbody>().velocity;
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47 Vector3 normal = transform.up;
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48
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49 float dot = Vector3.Dot(velocity, normal);
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50 GetComponent<Rigidbody>().AddForce(-normal * drag_force_ * dot);
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51
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52 Vector3 cross = Vector3.Cross(velocity, normal);
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53 GetComponent<Rigidbody>().AddTorque(-drag_torque_ * cross);
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54 }
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55
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56 void AirUpdate() {
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57 GetComponent<Rigidbody>().drag = air_drag_;
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58 GetComponent<Rigidbody>().angularDrag = air_angular_drag_;
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59 drag_force_ = airDragForce;
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60 drag_torque_ = airDragTorque;
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61 DragUpdate();
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62 }
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63
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64 void WaterUpdate(float level) {
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65 GetComponent<Rigidbody>().drag = waterDrag;
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66 GetComponent<Rigidbody>().angularDrag = waterAngularDrag;
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67
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68 drag_force_ = waterDragForce;
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69 drag_torque_ = waterDragTorque;
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70 DragUpdate();
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71
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72 float transition = Mathf.Clamp(-level / transitionWidth, 0.0f, 1.0f);
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73 GetComponent<Rigidbody>().AddForce(new Vector3(0, waterBuoancyForce * transition, 0));
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74
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75 if (Vector3.Dot(transform.up, Vector3.up) >= 0) {
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76 Vector3 torque_vector = Vector3.Cross(transform.up, Vector3.up);
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77 GetComponent<Rigidbody>().AddTorque((1 - transition) * waterSurfaceTorque * torque_vector);
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78 }
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79 else {
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80 Vector3 torque_vector = Vector3.Cross(-transform.up, Vector3.up);
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81 GetComponent<Rigidbody>().AddTorque((1 - transition) * waterSurfaceTorque * torque_vector);
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82 }
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83
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84 // Running water current.
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85 Vector3 delta_current = waterCurrentVelocity - GetComponent<Rigidbody>().velocity;
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86 delta_current.y = 0;
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87 GetComponent<Rigidbody>().AddForce(waterCurrentForce * delta_current);
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88 }
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89
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90 float UnitsAboveWater() {
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91 return transform.position.y - waterHeight;
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92 }
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93
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94 public bool TouchingWater() {
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95 return UnitsAboveWater() < 0;
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96 }
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97
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98 void FixedUpdate() {
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99 if (TouchingWater())
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100 WaterUpdate(UnitsAboveWater());
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101 else
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102 AirUpdate();
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103 }
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104 }