00001 // Wild Magic Source Code 00002 // David Eberly 00003 // http://www.geometrictools.com 00004 // Copyright (c) 1998-2007 00005 // 00006 // This library is free software; you can redistribute it and/or modify it 00007 // under the terms of the GNU Lesser General Public License as published by 00008 // the Free Software Foundation; either version 2.1 of the License, or (at 00009 // your option) any later version. The license is available for reading at 00010 // either of the locations: 00011 // http://www.gnu.org/copyleft/lgpl.html 00012 // http://www.geometrictools.com/License/WildMagicLicense.pdf 00013 // The license applies to versions 0 through 4 of Wild Magic. 00014 // 00015 // Version: 4.0.0 (2006/06/28) 00016 00017 namespace Wm4 00018 { 00019 //---------------------------------------------------------------------------- 00020 template <class Real> 00021 Plane3<Real>::Plane3 () 00022 { 00023 // uninitialized 00024 } 00025 //---------------------------------------------------------------------------- 00026 template <class Real> 00027 Plane3<Real>::Plane3 (const Plane3& rkPlane) 00028 : 00029 Normal(rkPlane.Normal) 00030 { 00031 Constant = rkPlane.Constant; 00032 } 00033 //---------------------------------------------------------------------------- 00034 template <class Real> 00035 Plane3<Real>::Plane3 (const Vector3<Real>& rkNormal, Real fConstant) 00036 : 00037 Normal(rkNormal) 00038 { 00039 Constant = fConstant; 00040 } 00041 //---------------------------------------------------------------------------- 00042 template <class Real> 00043 Plane3<Real>::Plane3 (const Vector3<Real>& rkNormal, const Vector3<Real>& rkP) 00044 : 00045 Normal(rkNormal) 00046 { 00047 Constant = rkNormal.Dot(rkP); 00048 } 00049 //---------------------------------------------------------------------------- 00050 template <class Real> 00051 Plane3<Real>::Plane3 (const Vector3<Real>& rkP0, const Vector3<Real>& rkP1, 00052 const Vector3<Real>& rkP2) 00053 { 00054 Vector3<Real> kEdge1 = rkP1 - rkP0; 00055 Vector3<Real> kEdge2 = rkP2 - rkP0; 00056 Normal = kEdge1.UnitCross(kEdge2); 00057 Constant = Normal.Dot(rkP0); 00058 } 00059 //---------------------------------------------------------------------------- 00060 template <class Real> 00061 Plane3<Real>& Plane3<Real>::operator= (const Plane3& rkPlane) 00062 { 00063 Normal = rkPlane.Normal; 00064 Constant = rkPlane.Constant; 00065 return *this; 00066 } 00067 //---------------------------------------------------------------------------- 00068 template <class Real> 00069 Real Plane3<Real>::DistanceTo (const Vector3<Real>& rkP) const 00070 { 00071 return Normal.Dot(rkP) - Constant; 00072 } 00073 //---------------------------------------------------------------------------- 00074 template <class Real> 00075 int Plane3<Real>::WhichSide (const Vector3<Real>& rkQ) const 00076 { 00077 Real fDistance = DistanceTo(rkQ); 00078 00079 if (fDistance < (Real)0.0) 00080 { 00081 return -1; 00082 } 00083 00084 if (fDistance > (Real)0.0) 00085 { 00086 return +1; 00087 } 00088 00089 return 0; 00090 } 00091 //---------------------------------------------------------------------------- 00092 } //namespace Wm4 00093
1.6.1