blob: 8aedab76eab7e61c1ced0ef724d329ca19db367a (
plain)
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 <math.h>
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;
}
|
