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68 lines
1.6 KiB
68 lines
1.6 KiB
/*
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**************************************************************************
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description
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--------------------
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copyright : (C) 2000-2001 by Andreas Zehender
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email : zehender@kde.org
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**************************************************************************
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**************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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**************************************************************************/
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// some helper functions
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#include "pmmath.h"
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#include <math.h>
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bool approx( double v1, double v2, double epsilon )
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{
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return fabs( v1 - v2 ) < epsilon;
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}
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bool approxZero( double v, double epsilon )
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{
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return fabs( v ) < epsilon;
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}
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double rad2Deg( double rad )
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{
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return rad / M_PI * 180.0;
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}
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double deg2Rad( double deg )
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{
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return deg * M_PI / 180.0;
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}
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double pmatan( double s, double c )
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{
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double a;
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if( approxZero( c ) )
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{
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if( s > 0 )
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a = M_PI_2;
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else
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a = -M_PI_2;
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}
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else
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a = atan2( s, c );
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return a;
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}
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int pmpot( int x, int y )
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{
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int i;
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int result = 1;
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for( i = 0; i < y; i++ )
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result *= x;
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return result;
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}
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