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00001 // MathTools.h: interface for the MathTools class. 00002 // 00004 00005 #if !defined(AFX_MATHTOOLS_H__D0539AA7_8BC3_4A5F_99A3_730FAE12C22E__INCLUDED_) 00006 #define AFX_MATHTOOLS_H__D0539AA7_8BC3_4A5F_99A3_730FAE12C22E__INCLUDED_ 00007 00008 #include <math.h> 00009 00010 class MathTools { 00011 public: 00012 MathTools() {} 00013 virtual ~MathTools() {} 00014 00016 static const double pi; 00017 00019 static const double degrees; 00020 00021 template<class Number> inline static Number sqr(Number x){ 00022 return x*x; 00023 } 00024 00025 template<class Number> inline static int sign(Number x){ 00026 return x>0 ? 1 : ( x==0 ? 0 : -1); 00027 } 00028 00030 template<class Number> inline static double setSign(double x, Number sign){ 00031 return sign>=0 ? fabs(x) : -fabs(x); 00032 } 00033 00034 template<class Number> inline static double max(Number a, Number b){ 00035 return a>b ? a : b; 00036 } 00037 00040 inline static double modulus(double x, double y){ 00041 double ax=fabs(x), ay=fabs(y); 00042 if(ax>ay) return ax*sqrt(1.0+sqr(ay/ax)); 00043 else return (ay==0.0 ? 0.0 : ay*sqrt(1.0+sqr(ax/ay)) ); 00044 } 00045 00046 00047 }; 00048 00049 #endif // !defined(AFX_MATHTOOLS_H__D0539AA7_8BC3_4A5F_99A3_730FAE12C22E__INCLUDED_)
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