OpenTTD Source  20241121-master-g67a0fccfad
autorail.h
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1 /*
2  * This file is part of OpenTTD.
3  * OpenTTD 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, version 2.
4  * OpenTTD 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.
5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
6  */
7 
10 /* Rail selection types (directions):
11  * / \ / \ / \ / \ / \ / \
12  * / /\ /\ \ /===\ / \ /| \ / |\
13  * \/ / \ \/ \ / \===/ \| / \ |/
14  * \ / \ / \ / \ / \ / \ /
15  * 0 1 2 3 4 5
16  */
17 
18 /* mark invalid tiles red */
19 #define RED(c) -c
20 
21 /* table maps each of the six rail directions and tileh combinations to a sprite
22  * invalid entries are required to make sure that this array can be quickly accessed */
23 static const int _AutorailTilehSprite[][6] = {
24 /* type 0 1 2 3 4 5 */
25  { 0, 8, 16, 25, 34, 42 }, // tileh = 0
26  { 5, 13, RED(22), RED(31), 35, 42 }, // tileh = 1
27  { 5, 10, 16, 26, RED(38), RED(46) }, // tileh = 2
28  { 5, 9, RED(23), 26, 35, RED(46) }, // tileh = 3
29  { 2, 10, RED(19), RED(28), 34, 43 }, // tileh = 4
30  { 1, 9, 17, 26, 35, 43 }, // tileh = 5
31  { 1, 10, RED(20), 26, RED(38), 43 }, // tileh = 6
32  { 1, 9, 17, 26, 35, 43 }, // tileh = 7
33  { 2, 13, 17, 25, RED(40), RED(48) }, // tileh = 8
34  { 1, 13, 17, RED(32), 35, RED(48) }, // tileh = 9
35  { 1, 9, 17, 26, 35, 43 }, // tileh = 10
36  { 1, 9, 17, 26, 35, 43 }, // tileh = 11
37  { 2, 9, 17, RED(29), RED(40), 43 }, // tileh = 12
38  { 1, 9, 17, 26, 35, 43 }, // tileh = 13
39  { 1, 9, 17, 26, 35, 43 }, // tileh = 14
40  { 0, 1, 2, 3, 4, 5 }, // invalid (15)
41  { 0, 1, 2, 3, 4, 5 }, // invalid (16)
42  { 0, 1, 2, 3, 4, 5 }, // invalid (17)
43  { 0, 1, 2, 3, 4, 5 }, // invalid (18)
44  { 0, 1, 2, 3, 4, 5 }, // invalid (19)
45  { 0, 1, 2, 3, 4, 5 }, // invalid (20)
46  { 0, 1, 2, 3, 4, 5 }, // invalid (21)
47  { 0, 1, 2, 3, 4, 5 }, // invalid (22)
48  { 6, 11, 17, 27, RED(39), RED(47) }, // tileh = 23
49  { 0, 1, 2, 3, 4, 5 }, // invalid (24)
50  { 0, 1, 2, 3, 4, 5 }, // invalid (25)
51  { 0, 1, 2, 3, 4, 5 }, // invalid (26)
52  { 7, 15, RED(24), RED(33), 36, 44 }, // tileh = 27
53  { 0, 1, 2, 3, 4, 5 }, // invalid (28)
54  { 3, 14, 18, 26, RED(41), RED(49) }, // tileh = 29
55  { 4, 12, RED(21), RED(30), 37, 45 } // tileh = 30
56 };
57 #undef RED
58 
59 
60 /* maps each pixel of a tile (16x16) to a selection type
61  * (0,0) is the top corner, (16,16) the bottom corner */
62 static const HighLightStyle _autorail_piece[][16] = {
79 };
HighLightStyle
Highlighting draw styles.
@ HT_DIR_HL
horizontal lower
@ HT_DIR_HU
horizontal upper
@ HT_DIR_X
X direction.
@ HT_DIR_VL
vertical left
@ HT_DIR_VR
vertical right
@ HT_DIR_Y
Y direction.