opensim-development – Blame information for rev 1
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1 | eva | 1 | /* The MIT License |
2 | * |
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3 | * Copyright (c) 2010 Intel Corporation. |
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4 | * All rights reserved. |
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5 | * |
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6 | * Based on the convexdecomposition library from |
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7 | * <http://codesuppository.googlecode.com> by John W. Ratcliff and Stan Melax. |
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8 | * |
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9 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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10 | * of this software and associated documentation files (the "Software"), to deal |
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11 | * in the Software without restriction, including without limitation the rights |
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12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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13 | * copies of the Software, and to permit persons to whom the Software is |
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14 | * furnished to do so, subject to the following conditions: |
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15 | * |
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16 | * The above copyright notice and this permission notice shall be included in |
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17 | * all copies or substantial portions of the Software. |
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18 | * |
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19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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25 | * THE SOFTWARE. |
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26 | */ |
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27 | |||
28 | using System; |
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29 | |||
30 | namespace OpenSim.Region.Physics.ConvexDecompositionDotNet |
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31 | { |
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32 | public class Plane |
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33 | { |
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34 | public float3 normal = new float3(); |
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35 | public float dist; // distance below origin - the D from plane equasion Ax+By+Cz+D=0 |
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36 | |||
37 | public Plane(float3 n, float d) |
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38 | { |
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39 | normal = new float3(n); |
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40 | dist = d; |
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41 | } |
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42 | |||
43 | public Plane(Plane p) |
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44 | { |
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45 | normal = new float3(p.normal); |
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46 | dist = p.dist; |
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47 | } |
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48 | |||
49 | public Plane() |
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50 | { |
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51 | dist = 0; |
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52 | } |
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53 | |||
54 | public void Transform(float3 position, Quaternion orientation) |
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55 | { |
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56 | // Transforms the plane to the space defined by the |
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57 | // given position/orientation |
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58 | float3 newNormal = Quaternion.Inverse(orientation) * normal; |
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59 | float3 origin = Quaternion.Inverse(orientation) * (-normal * dist - position); |
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60 | |||
61 | normal = newNormal; |
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62 | dist = -float3.dot(newNormal, origin); |
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63 | } |
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64 | |||
65 | public override int GetHashCode() |
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66 | { |
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67 | return normal.GetHashCode() ^ dist.GetHashCode(); |
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68 | } |
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69 | |||
70 | public override bool Equals(object obj) |
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71 | { |
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72 | Plane p = obj as Plane; |
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73 | if (p == null) |
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74 | return false; |
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75 | |||
76 | return this == p; |
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77 | } |
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78 | |||
79 | public static bool operator ==(Plane a, Plane b) |
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80 | { |
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81 | return (a.normal == b.normal && a.dist == b.dist); |
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82 | } |
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83 | |||
84 | public static bool operator !=(Plane a, Plane b) |
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85 | { |
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86 | return !(a == b); |
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87 | } |
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88 | |||
89 | public static Plane PlaneFlip(Plane plane) |
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90 | { |
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91 | return new Plane(-plane.normal, -plane.dist); |
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92 | } |
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93 | |||
94 | public static bool coplanar(Plane a, Plane b) |
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95 | { |
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96 | return (a == b || a == PlaneFlip(b)); |
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97 | } |
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98 | } |
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99 | } |