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annotate Orchestland/Assets/LeapMotion/Scripts/Utils/LeapUnityExtensions.cs @ 1:f7675884f2a1
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author | Daiki OYAKAWA <e135764@ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2015 23:09:20 +0900 |
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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 using Leap; |
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10 |
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11 namespace Leap { |
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12 |
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13 /** |
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14 * Extends the Leap Motion Vector class to converting points and directions from the |
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15 * Leap Motion coordinate system into the Unity coordinate system. |
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16 */ |
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17 public static class UnityVectorExtension { |
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18 |
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19 // Leap coordinates are in mm and Unity is in meters. So scale by 1000. |
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20 /** Scale factor from Leap units (millimeters) to Unity units (meters). */ |
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21 public const float INPUT_SCALE = 0.001f; |
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22 /** Constant used when converting from right-handed to left-handed axes.*/ |
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23 public static readonly Vector3 Z_FLIP = new Vector3(1, 1, -1); |
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24 |
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25 /** |
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26 * Converts a direction vector from Leap to Unity. (Does not scale.) |
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27 * |
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28 * Changes from the Leap Motion right-hand coordinate convention to the |
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29 * Unity left-handed convention by negating the z-coordinate. |
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30 * |
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31 * @param mirror If true, the vector is reflected along the z axis. |
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32 * @param leap_vector the Leap.Vector object to convert. |
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33 */ |
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34 public static Vector3 ToUnity(this Vector leap_vector, bool mirror = false) { |
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35 if (mirror) |
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36 return ToVector3(leap_vector); |
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37 |
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38 return FlipZ(ToVector3(leap_vector)); |
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39 } |
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40 |
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41 /** |
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42 * Converts a point from Leap to Unity. (Scales.) |
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43 * |
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44 * Changes from the Leap Motion right-hand coordinate convention to the |
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45 * Unity left-handed convention by negating the z-coordinate. Also scales |
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46 * from Leap Motion millimeter units to Unity meter units by multiplying |
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47 * the vector by .001. |
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48 * |
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49 * @param mirror If true, the vector is reflected along the z axis. |
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50 * @param leap_vector the Leap.Vector object to convert. |
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51 */ |
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52 public static Vector3 ToUnityScaled(this Vector leap_vector, bool mirror = false) { |
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53 if (mirror) |
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54 return INPUT_SCALE * ToVector3(leap_vector); |
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55 |
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56 return INPUT_SCALE * FlipZ(ToVector3(leap_vector)); |
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57 } |
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58 |
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59 private static Vector3 FlipZ(Vector3 vector) { |
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60 return Vector3.Scale(vector, Z_FLIP); |
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61 } |
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62 |
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63 private static Vector3 ToVector3(Vector vector) { |
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64 return new Vector3(vector.x, vector.y, vector.z); |
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65 } |
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66 } |
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67 |
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68 /** |
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69 * Extends the Leap Mition Matrix class to convert Leap Matrix objects to |
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70 * to Unity Quaternion rotations and translations. |
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71 */ |
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72 public static class UnityMatrixExtension { |
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73 /** Up in the Leap coordinate system.*/ |
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74 public static readonly Vector LEAP_UP = new Vector(0, 1, 0); |
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75 /** Forward in the Leap coordinate system.*/ |
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76 public static readonly Vector LEAP_FORWARD = new Vector(0, 0, -1); |
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77 /** The origin point in the Leap coordinate system.*/ |
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78 public static readonly Vector LEAP_ORIGIN = new Vector(0, 0, 0); |
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79 |
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80 /** |
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81 * Converts a Leap Matrix object representing a rotation to a |
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82 * Unity Quaternion. |
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83 * |
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84 * @param matrix The Leap.Matrix to convert. |
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85 * @param mirror If true, the operation is reflected along the z axis. |
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86 */ |
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87 public static Quaternion Rotation(this Matrix matrix, bool mirror = false) { |
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88 Vector3 up = matrix.TransformDirection(LEAP_UP).ToUnity(mirror); |
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89 Vector3 forward = matrix.TransformDirection(LEAP_FORWARD).ToUnity(mirror); |
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90 return Quaternion.LookRotation(forward, up); |
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91 } |
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92 |
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93 /** |
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94 * Converts a Leap Matrix object representing a translation to a |
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95 * Unity Vector3 object. |
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96 * |
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97 * @param matrix The Leap.Matrix to convert. |
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98 * @param mirror If true, the operation is reflected along the z axis. |
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99 */ |
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100 public static Vector3 Translation(this Matrix matrix, bool mirror = false) { |
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101 return matrix.TransformPoint(LEAP_ORIGIN).ToUnityScaled(mirror); |
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102 } |
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103 } |
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104 } |