CrystalSpace

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csgeom/tri.h

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00001   /*
00002     Copyright (C) 2003 by Jorrit Tyberghein
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __CS_TRIANGLE_H__
00020 #define __CS_TRIANGLE_H__
00021 
00029 #include "csextern.h"
00030 
00031 namespace CS
00032 {
00038   template<typename T>
00039   struct TriangleT
00040   {
00041 #if !defined(__STRICT_ANSI__) && !defined(SWIG)
00042     union
00043     {
00044       struct 
00045       {
00046 #endif
00047 
00048 
00049         T a, b, c;
00051 #if !defined(__STRICT_ANSI__) && !defined(SWIG)
00052       };
00054       T components[3];
00055     };
00056 #endif
00057 
00059     TriangleT () {}
00060 
00062     TriangleT (const T& _a, const T& _b, const T& _c) : a(_a), b(_b), c(_c) {}
00063 
00065     TriangleT (const TriangleT& t)
00066     {
00067       a = t.a;
00068       b = t.b;
00069       c = t.c;
00070     }
00071 
00073     TriangleT& operator= (const TriangleT& t)
00074     {
00075       a = t.a;
00076       b = t.b;
00077       c = t.c;
00078       return *this;
00079     }
00080 
00082     void Set (const T& _a, const T& _b, const T& _c)
00083     {
00084       a = _a;
00085       b = _b;
00086       c = _c;
00087     }
00088 
00090 #ifdef __STRICT_ANSI__
00091     inline const T& operator[] (size_t n) const { return !n?a:n&1?b:c; }
00092 #else
00093     inline const T& operator[] (size_t n) const { return components[n]; }
00094 #endif
00095 
00097 #ifdef __STRICT_ANSI__
00098     inline T& operator[] (size_t n) { return !n?a:n&1?b:c; }
00099 #else
00100     inline T& operator[] (size_t n) { return components[n]; }
00101 #endif
00102 
00103   };
00104 }
00105 
00111 struct csTriangle : public CS::TriangleT<int>
00112 {
00113   csTriangle () {}
00114 
00116   csTriangle (int _a, int _b, int _c) : CS::TriangleT<int> (_a, _b, _c) {}
00117 
00119   csTriangle (const CS::TriangleT<int>& t) : CS::TriangleT<int> (t) {}
00120 };
00121 
00124 #endif // __CS_TRIANGLE_H__
00125 

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