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math.h
Go to the documentation of this file.00001 /* 00002 Copyright (C) 2005 by Marten Svanfeldt 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_MATH_H__ 00020 #define __CS_MATH_H__ 00021 00031 template<class T> 00032 const T& csMax (const T& a, const T& b) 00033 { 00034 if (a >= b) return a; 00035 return b; 00036 } 00037 00041 template<class T> 00042 const T& csMin (const T& a, const T& b) 00043 { 00044 if (a < b) return a; 00045 return b; 00046 } 00047 00048 00052 template<class T> 00053 T csClamp (const T& a, T max, T min) 00054 { 00055 return csMin (csMax (a, min), max); 00056 } 00057 00061 template<class T> 00062 T csSmoothStep (const T& a, T max, T min) 00063 { 00064 T tmp; 00065 if (a <= min) 00066 tmp = min; 00067 else if (a >= max) 00068 tmp = max; 00069 else 00070 { 00071 a = (a - min) / (max-min); 00072 tmp = a*a * (3.0 - 2.0*a); 00073 } 00074 return tmp; 00075 } 00076 00080 template<class T> 00081 T csSquare (const T& x) 00082 { 00083 return x * x; 00084 } 00085 00088 #endif //__CS_MATH_H__
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