Project::OSiRiON - Git repositories
Project::OSiRiON
News . About . Screenshots . Downloads . Forum . Wiki . Tracker . Git
summaryrefslogtreecommitdiff
blob: 7fb40be05621bbe022da55e1c9f46996ce29eb45 (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
68
69
70
71
72
73
74
75
/*
   math/functions.cc
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#include "math/functions.h"
#include <stdlib.h>

namespace math
{

const float DELTA = 10e-10;

float min(float a, float b)
{
	return (a < b ? a : b);
}

float max(float a, float b)
{
	return (a > b ? a : b);
}

int min(int a, int b)
{
	return (a < b ? a : b);
}

int max(int a, int b)
{
	return (a > b ? a : b);
}

float randomf(const float max)
{
	return ((float) rand() / (float) RAND_MAX) * max;
}

unsigned randomi(const unsigned int max)
{
	return ((unsigned int)(rand() % max));
}

float degrees180f(float angle)
{
	float r = angle;
	while (r - DELTA < -180.0f)
		r += 360.0f;
	while (r + DELTA > 180.0f)
		r -= 360.0f;
	return r;
}

float degrees360f(float angle)
{
	float r = angle;
	while (r - DELTA < 0)
		r += 360.0f;
	while (r + DELTA > 360.0f)
		r -= 360.0f;
	return r;
}

float sgnf(float value)
{
	if (value < 0)
		return -1;
	else if (value > 0)
		return 1;

	return 0;
}

} // namespace math