blob: 4e6d5a7e1391e8fbab03481d0a00620367f73270 (
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
|
/* $Id$ */
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file tunnel_map.cpp Map accessors for tunnels. */
#include "stdafx.h"
#include "tunnelbridge_map.h"
#include "safeguards.h"
/**
* Gets the other end of the tunnel. Where a vehicle would reappear when it
* enters at the given tile.
* @param tile the tile to search from.
* @return the tile of the other end of the tunnel.
*/
TileIndex GetOtherTunnelEnd(TileIndex tile)
{
DiagDirection dir = GetTunnelBridgeDirection(tile);
TileIndexDiff delta = TileOffsByDiagDir(dir);
int z = GetTileZ(tile);
dir = ReverseDiagDir(dir);
do {
tile += delta;
} while (
!IsTunnelTile(tile) ||
GetTunnelBridgeDirection(tile) != dir ||
GetTileZ(tile) != z
);
return tile;
}
/**
* Is there a tunnel in the way in the given direction?
* @param tile the tile to search from.
* @param z the 'z' to search on.
* @param dir the direction to start searching to.
* @return true if and only if there is a tunnel.
*/
bool IsTunnelInWayDir(TileIndex tile, int z, DiagDirection dir)
{
TileIndexDiff delta = TileOffsByDiagDir(dir);
int height;
do {
tile -= delta;
if (!IsValidTile(tile)) return false;
height = GetTileZ(tile);
} while (z < height);
return z == height && IsTunnelTile(tile) && GetTunnelBridgeDirection(tile) == dir;
}
/**
* Is there a tunnel in the way in any direction?
* @param tile the tile to search from.
* @param z the 'z' to search on.
* @return true if and only if there is a tunnel.
*/
bool IsTunnelInWay(TileIndex tile, int z)
{
return IsTunnelInWayDir(tile, z, (TileX(tile) > (MapMaxX() / 2)) ? DIAGDIR_NE : DIAGDIR_SW) ||
IsTunnelInWayDir(tile, z, (TileY(tile) > (MapMaxY() / 2)) ? DIAGDIR_NW : DIAGDIR_SE);
}
|
