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74 lines
1.6 KiB
74 lines
1.6 KiB
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** |
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* Qwt Widget Library |
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* Copyright (C) 1997 Josef Wilgen |
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* Copyright (C) 2002 Uwe Rathmann |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the Qwt License, Version 1.0 |
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*****************************************************************************/ |
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#include "qwt_math.h" |
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/*! |
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\brief Find the smallest value in an array |
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\param array Pointer to an array |
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\param size Array size |
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*/ |
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double qwtGetMin( const double *array, int size ) |
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{ |
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if ( size <= 0 ) |
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return 0.0; |
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double rv = array[0]; |
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for ( int i = 1; i < size; i++ ) |
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rv = qMin( rv, array[i] ); |
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return rv; |
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} |
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/*! |
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\brief Find the largest value in an array |
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\param array Pointer to an array |
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\param size Array size |
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*/ |
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double qwtGetMax( const double *array, int size ) |
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{ |
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if ( size <= 0 ) |
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return 0.0; |
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double rv = array[0]; |
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for ( int i = 1; i < size; i++ ) |
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rv = qMax( rv, array[i] ); |
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return rv; |
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} |
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/*! |
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\brief Normalize an angle to be int the range [0.0, 2 * PI[ |
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\param radians Angle in radians |
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\return Normalized angle in radians |
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*/ |
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double qwtNormalizeRadians( double radians ) |
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{ |
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double a = ::fmod( radians, 2.0 * M_PI ); |
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if ( a < 0.0 ) |
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a += 2.0 * M_PI; |
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return a; |
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} |
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/*! |
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\brief Normalize an angle to be int the range [0.0, 360.0[ |
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\param radians Angle in degrees |
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\return Normalized angle in degrees |
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*/ |
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double qwtNormalizeDegrees( double degrees ) |
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{ |
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double a = ::fmod( degrees, 360.0 ); |
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if ( a < 0.0 ) |
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a += 360.0; |
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return a; |
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}
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