100 lines
3.1 KiB
C#
100 lines
3.1 KiB
C#
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/* The MIT License
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*
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* Copyright (c) 2010 Intel Corporation.
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* All rights reserved.
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*
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* Based on the convexdecomposition library from
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* <http://codesuppository.googlecode.com> by John W. Ratcliff and Stan Melax.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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using System;
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namespace OpenSim.Region.Physics.ConvexDecompositionDotNet
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{
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public class Plane
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{
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public float3 normal = new float3();
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public float dist; // distance below origin - the D from plane equasion Ax+By+Cz+D=0
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public Plane(float3 n, float d)
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{
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normal = new float3(n);
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dist = d;
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}
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public Plane(Plane p)
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{
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normal = new float3(p.normal);
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dist = p.dist;
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}
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public Plane()
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{
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dist = 0;
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}
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public void Transform(float3 position, Quaternion orientation)
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{
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// Transforms the plane to the space defined by the
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// given position/orientation
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float3 newNormal = Quaternion.Inverse(orientation) * normal;
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float3 origin = Quaternion.Inverse(orientation) * (-normal * dist - position);
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normal = newNormal;
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dist = -float3.dot(newNormal, origin);
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}
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public override int GetHashCode()
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{
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return normal.GetHashCode() ^ dist.GetHashCode();
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}
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public override bool Equals(object obj)
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{
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Plane p = obj as Plane;
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if (p == null)
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return false;
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return this == p;
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}
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public static bool operator ==(Plane a, Plane b)
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{
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return (a.normal == b.normal && a.dist == b.dist);
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}
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public static bool operator !=(Plane a, Plane b)
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{
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return !(a == b);
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}
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public static Plane PlaneFlip(Plane plane)
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{
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return new Plane(-plane.normal, -plane.dist);
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}
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public static bool coplanar(Plane a, Plane b)
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{
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return (a == b || a == PlaneFlip(b));
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}
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}
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}
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