123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899 |
- /* 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.PhysicsModules.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));
- }
- }
- }
|