karbon
vglobal.h
00001 /* This file is part of the KDE project 00002 Copyright (C) 2001, The Karbon Developers 00003 Copyright (C) 2002, The Karbon Developers 00004 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Library General Public 00007 License as published by the Free Software Foundation; either 00008 version 2 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 Library General Public License for more details. 00014 00015 You should have received a copy of the GNU Library General Public License 00016 along with this library; see the file COPYING.LIB. If not, write to 00017 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 00018 * Boston, MA 02110-1301, USA. 00019 */ 00020 00021 #ifndef __VGLOBAL_H__ 00022 #define __VGLOBAL_H__ 00023 00024 #include <kglobal.h> 00025 00026 // define some often used mathematical constants et al: 00027 00028 // TODO: optimize those values. 00029 00030 namespace VGlobal 00031 { 00032 const double pi = 3.14159265358979323846; // pi 00033 const double twopi = 6.28318530717958647692; // 2pi 00034 const double pi_2 = 1.57079632679489661923; // pi/2 00035 const double pi_180 = 0.01745329251994329576; // pi/180 00036 const double one_pi_180 = 57.29577951308232087684; // 180/pi 00037 const double sqrt2 = 1.41421356237309504880; // sqrt(2) 00038 const double one_3 = 0.33333333333333333333; // 1/3 00039 const double two_3 = 0.66666666666666666667; // 2/3 00040 const double one_6 = 0.16666666666666666667; // 1/6 00041 const double one_7 = 0.14285714285714285714; // 1/7 00042 00047 const double veryBigNumber = 1.0e8; 00048 const double verySmallNumber = 1.0e-8; 00049 00053 const double flatnessTolerance = 0.01; 00054 00060 const double lengthTolerance = 0.005; 00061 00068 const double paramLengthTolerance = 0.001; 00069 00074 const double isNearRange = 0.001; 00075 00080 const double parallelTolerance = 0.99; 00081 00085 inline int sign( double a ) 00086 { 00087 return a < 0.0 00088 ? -1 00089 : 1; 00090 } 00091 00095 int binomialCoeff( unsigned n, unsigned k ); 00096 00100 double factorialLn( unsigned n ); 00101 00105 double gammaLn( double x ); 00106 } 00107 00108 #endif 00109