75 lines
1.6 KiB
C++
75 lines
1.6 KiB
C++
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/* -*- 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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