blob: 41d6f8bbe9f7b9548c9a9ca3a7b10c30de97b9e6 (
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
76
77
78
|
/*
Minetest-c55
Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
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.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef LIGHT_HEADER
#define LIGHT_HEADER
#include "common_irrlicht.h"
/*
Lower level lighting stuff
*/
// This directly sets the range of light
#define LIGHT_MAX 14
// Light is stored as 4 bits, thus 15 is the maximum.
// This brightness is reserved for sunlight
#define LIGHT_SUN 15
inline u8 diminish_light(u8 light)
{
if(light == 0)
return 0;
if(light >= LIGHT_MAX)
return LIGHT_MAX - 1;
return light - 1;
}
inline u8 diminish_light(u8 light, u8 distance)
{
if(distance >= light)
return 0;
return light - distance;
}
inline u8 undiminish_light(u8 light)
{
// We don't know if light should undiminish from this particular 0.
// Thus, keep it at 0.
if(light == 0)
return 0;
if(light == LIGHT_MAX)
return light;
return light + 1;
}
extern u8 light_decode_table[LIGHT_MAX+1];
inline u8 decode_light(u8 light)
{
if(light == LIGHT_SUN)
return light_decode_table[LIGHT_MAX];
if(light > LIGHT_MAX)
throw;
return light_decode_table[light];
}
#endif
|
