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