OpenTTD Source 20250205-master-gfd85ab1e2c
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 */
23static 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 */
62static 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.