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path: root/kpovmodeler/pmmath.cpp
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 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 ``` ``````/* ************************************************************************** description -------------------- copyright : (C) 2000-2001 by Andreas Zehender email : zehender@kde.org ************************************************************************** ************************************************************************** * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * **************************************************************************/ // some helper functions #include "pmmath.h" #include bool approx( double v1, double v2, double epsilon ) { return fabs( v1 - v2 ) < epsilon; } bool approxZero( double v, double epsilon ) { return fabs( v ) < epsilon; } double rad2Deg( double rad ) { return rad / M_PI * 180.0; } double deg2Rad( double deg ) { return deg * M_PI / 180.0; } double pmatan( double s, double c ) { double a; if( approxZero( c ) ) { if( s > 0 ) a = M_PI_2; else a = -M_PI_2; } else a = atan2( s, c ); return a; } int pmpot( int x, int y ) { int i; int result = 1; for( i = 0; i < y; i++ ) result *= x; return result; } ``````