OpenTTD Source: src/bridge_map.cpp Source File

OpenTTD Source 13.1

bridge_map.cpp
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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 #include "stdafx.h"
11 #include "landscape.h"
12 #include "tunnelbridge_map.h"
13
14 #include "safeguards.h"
15
16
22 static TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
23 {
24 TileIndexDiff delta = TileOffsByDiagDir(dir);
25
26 dir = ReverseDiagDir(dir);
27 do {
28 tile += delta;
29 } while (!IsBridgeTile(tile) || GetTunnelBridgeDirection(tile) != dir);
30
31 return tile;
32 }
33
34
39 TileIndex GetNorthernBridgeEnd(TileIndex t)
40 {
41 return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
42 }
43
44
49 TileIndex GetSouthernBridgeEnd(TileIndex t)
50 {
51 return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
52 }
53
54
59 TileIndex GetOtherBridgeEnd(TileIndex tile)
60 {
61 assert(IsBridgeTile(tile));
62 return GetBridgeEnd(tile, GetTunnelBridgeDirection(tile));
63 }
64
70 int GetBridgeHeight(TileIndex t)
71 {
72 int h;
73 Slope tileh = GetTileSlope(t, &h);
74 Foundation f = GetBridgeFoundation(tileh, DiagDirToAxis(GetTunnelBridgeDirection(t)));
75
76 /* one height level extra for the ramp */
77 return h + 1 + ApplyFoundationToSlope(f, &tileh);
78 }
GetOtherBridgeEnd
TileIndex GetOtherBridgeEnd(TileIndex tile)
Starting at one bridge end finds the other bridge end.
Definition: bridge_map.cpp:59
TileOffsByDiagDir
static TileIndexDiff TileOffsByDiagDir(DiagDirection dir)
Convert a DiagDirection to a TileIndexDiff.
Definition: map_func.h:341
GetBridgeFoundation
Foundation GetBridgeFoundation(Slope tileh, Axis axis)
Get the foundation for a bridge.
Definition: tunnelbridge_cmd.cpp:128
tunnelbridge_map.h
DiagDirToAxis
static Axis DiagDirToAxis(DiagDirection d)
Convert a DiagDirection to the axis.
Definition: direction_func.h:214
GetBridgeHeight
int GetBridgeHeight(TileIndex t)
Get the height ('z') of a bridge.
Definition: bridge_map.cpp:70
TileIndex
The index/ID of a Tile.
Definition: tile_type.h:85
Foundation
Foundation
Enumeration for Foundations.
Definition: slope_type.h:93
Slope
Slope
Enumeration for the slope-type.
Definition: slope_type.h:48
IsBridgeTile
static bool IsBridgeTile(TileIndex t)
checks if there is a bridge on this tile
Definition: bridge_map.h:35
TileIndexDiff
int32 TileIndexDiff
An offset value between two tiles.
Definition: map_func.h:154
GetBridgeEnd
static TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
Finds the end of a bridge in the specified direction starting at a middle tile.
Definition: bridge_map.cpp:22
GetNorthernBridgeEnd
TileIndex GetNorthernBridgeEnd(TileIndex t)
Finds the northern end of a bridge starting at a middle tile.
Definition: bridge_map.cpp:39
safeguards.h
GetTileSlope
Slope GetTileSlope(TileIndex tile, int *h)
Return the slope of a given tile inside the map.
Definition: tile_map.cpp:59
ReverseDiagDir
static DiagDirection ReverseDiagDir(DiagDirection d)
Returns the reverse direction of the given DiagDirection.
Definition: direction_func.h:118
GetSouthernBridgeEnd
TileIndex GetSouthernBridgeEnd(TileIndex t)
Finds the southern end of a bridge starting at a middle tile.
Definition: bridge_map.cpp:49
DiagDirection
DiagDirection
Enumeration for diagonal directions.
Definition: direction_type.h:77
stdafx.h
landscape.h
AxisToDiagDir
static DiagDirection AxisToDiagDir(Axis a)
Converts an Axis to a DiagDirection.
Definition: direction_func.h:232
GetTunnelBridgeDirection
static DiagDirection GetTunnelBridgeDirection(TileIndex t)
Get the direction pointing to the other end.
Definition: tunnelbridge_map.h:26
GetBridgeAxis
static Axis GetBridgeAxis(TileIndex t)
Get the axis of the bridge that goes over the tile.
Definition: bridge_map.h:68
ApplyFoundationToSlope
uint ApplyFoundationToSlope(Foundation f, Slope *s)
Applies a foundation to a slope.
Definition: landscape.cpp:166