Wm4Segment3.h

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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 #ifndef WM4SEGMENT3_H
00018 #define WM4SEGMENT3_H
00019 
00020 #include "Wm4FoundationLIB.h"
00021 #include "Wm4Vector3.h"
00022 
00023 namespace Wm4
00024 {
00025 
00026 template <class Real>
00027 class Segment3
00028 {
00029 public:
00030     // The segment is represented as P+t*D, where P is the segment origin,
00031     // D is a unit-length direction vector and |t| <= e.  The value e is
00032     // referred to as the extent of the segment.  The end points of the
00033     // segment are P-e*D and P+e*D.  The user must ensure that the direction
00034     // vector is unit-length.  The representation for a segment is analogous
00035     // to that for an oriented bounding box.  P is the center, D is the
00036     // axis direction, and e is the extent.
00037 
00038     // construction
00039     Segment3 ();  // uninitialized
00040     Segment3 (const Vector3<Real>& rkOrigin, const Vector3<Real>& rkDirection,
00041         Real fExtent);
00042 
00043     // end points
00044     Vector3<Real> GetPosEnd () const;  // P+e*D
00045     Vector3<Real> GetNegEnd () const;  // P-e*D
00046 
00047     Vector3<Real> Origin, Direction;
00048     Real Extent;
00049 };
00050 
00051 }
00052 
00053 #include "Wm4Segment3.inl"
00054 
00055 namespace Wm4
00056 {
00057 typedef Segment3<float> Segment3f;
00058 typedef Segment3<double> Segment3d;
00059 
00060 }
00061 
00062 #endif

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