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LibN2L-4 Library Code ReferenceClassesCompounds Files Members Method Index Full Reference cBezier33.hGo to the documentation of this file.00001 /************************************************************************ 00002 Nova-2 Library (libN2L, or simply n2l) Game development C++ Library 00003 Copyright (C) 2002 Aaron Cameron 00004 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Lesser General Public 00007 License as published by the Free Software Foundation; either 00008 version 2.1 of the License, or (at your option) any later version. 00009 00010 This library is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 Lesser General Public License for more details. 00014 00015 You should have received a copy of the GNU Lesser General Public 00016 License along with this library; if not, write to the Free Software 00017 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 00019 A copy of the GNU Lesser General Public License has been provided with 00020 this library in the file 'COPYING'. 00021 00022 Contact information for the author of this library has been provided 00023 with this library in the file 'AUTHOR'. 00024 ************************************************************************/ 00025 00026 /************************************************************************ 00027 NOTICE #1 00028 Code in this class was taken from from the web. I was unable to find 00029 any license information, so I've included the author and the source here: 00030 00031 Bezier curves 00032 Written by Paul Bourke 00033 Original: April 1989, Updated: December 1996 00034 http://astronomy.swin.edu.au/~pbourke/curves/bezier/ 00035 ************************************************************************/ 00036 00037 00038 #ifndef _n2l4_cBezier33_h 00039 #define _n2l4_cBezier33_h 00040 00041 namespace n2l 00042 { 00043 00048 template <class TComponent, class TTime> 00049 class cBezier33 00050 { 00051 public: 00052 typedef cBezier33<TComponent,TTime> tThisCurve; 00053 typedef TComponent tComponent; 00054 typedef cVector3<TComponent,TComponent,TComponent> tVector; 00055 typedef TTime tTime; 00056 00057 // Constructors 00058 /* ************************************************************ */ 00059 cBezier33() 00060 { 00061 mPoint[0].set(0,0,0); 00062 mPoint[1].set(0,0,0); 00063 mPoint[2].set(0,0,0); 00064 } 00065 00066 /* ************************************************************ */ 00067 cBezier33( const tVector & iP0, 00068 const tVector & iP1, 00069 const tVector & iP2 ) 00070 { 00071 mPoint[0] = iP0; 00072 mPoint[1] = iP1; 00073 mPoint[2] = iP2; 00074 } 00075 00076 /* ************************************************************ */ 00077 cBezier33( const tThisCurve & iCurve ) 00078 { 00079 mPoint[0] = iCurve.mPoint[0]; 00080 mPoint[1] = iCurve.mPoint[1]; 00081 mPoint[2] = iCurve.mPoint[2]; 00082 } 00083 00084 /* ************************************************************ */ 00085 const tVector pointAt( const tTime & iTime ) 00086 { 00087 // See NOTICE #1 above 00088 tComponent mum1,mum12,mu2; 00089 tVector p; 00090 00091 mu2 = iTime * iTime; 00092 mum1 = 1 - iTime; 00093 mum12 = mum1 * mum1; 00094 p.x( mPoint[0].x() * mum12 + 2 * mPoint[1].x() * mum1 * iTime + mPoint[2].x() * mu2 ); 00095 p.y( mPoint[0].y() * mum12 + 2 * mPoint[1].y() * mum1 * iTime + mPoint[2].y() * mu2 ); 00096 p.z( mPoint[0].z() * mum12 + 2 * mPoint[1].z() * mum1 * iTime + mPoint[2].z() * mu2 ); 00097 00098 return p; 00099 } 00100 00101 private: 00102 tVector mPoint[3]; 00103 00104 }; // class 00105 00106 } // namespace n2l 00107 00108 00109 00110 #endif |
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