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
68
69
70
71
72
73
74
|
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
#include "qwt_math.h"
/*!
\brief Find the smallest value in an array
\param array Pointer to an array
\param size Array size
*/
double qwtGetMin( const double *array, int size )
{
if ( size <= 0 )
return 0.0;
double rv = array[0];
for ( int i = 1; i < size; i++ )
rv = qMin( rv, array[i] );
return rv;
}
/*!
\brief Find the largest value in an array
\param array Pointer to an array
\param size Array size
*/
double qwtGetMax( const double *array, int size )
{
if ( size <= 0 )
return 0.0;
double rv = array[0];
for ( int i = 1; i < size; i++ )
rv = qMax( rv, array[i] );
return rv;
}
/*!
\brief Normalize an angle to be int the range [0.0, 2 * PI[
\param radians Angle in radians
\return Normalized angle in radians
*/
double qwtNormalizeRadians( double radians )
{
double a = ::fmod( radians, 2.0 * M_PI );
if ( a < 0.0 )
a += 2.0 * M_PI;
return a;
}
/*!
\brief Normalize an angle to be int the range [0.0, 360.0[
\param radians Angle in degrees
\return Normalized angle in degrees
*/
double qwtNormalizeDegrees( double degrees )
{
double a = ::fmod( degrees, 360.0 );
if ( a < 0.0 )
a += 360.0;
return a;
}
|
