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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/* $Id$ */
/** @file bridge_map.h Map accessor functions for bridges. */
#ifndef BRIDGE_MAP_H
#define BRIDGE_MAP_H
#include "direction_func.h"
#include "rail_type.h"
#include "transport_type.h"
#include "road_map.h"
#include "bridge.h"
/**
* Checks if this is a bridge, instead of a tunnel
* @param t The tile to analyze
* @pre IsTileType(t, MP_TUNNELBRIDGE)
* @return true if the structure is a bridge one
*/
static inline bool IsBridge(TileIndex t)
{
assert(IsTileType(t, MP_TUNNELBRIDGE));
return HasBit(_m[t].m5, 7);
}
/**
* checks if there is a bridge on this tile
* @param t The tile to analyze
* @return true if a bridge is present
*/
static inline bool IsBridgeTile(TileIndex t)
{
return IsTileType(t, MP_TUNNELBRIDGE) && IsBridge(t);
}
/**
* checks for the possibility that a bridge may be on this tile
* These are in fact all the tile types on which a bridge can be found
* @param t The tile to analyze
* @return true if a bridge migh be present
*/
static inline bool MayHaveBridgeAbove(TileIndex t)
{
return
IsTileType(t, MP_CLEAR) ||
IsTileType(t, MP_RAILWAY) ||
IsTileType(t, MP_ROAD) ||
IsTileType(t, MP_WATER) ||
IsTileType(t, MP_TUNNELBRIDGE) ||
IsTileType(t, MP_UNMOVABLE);
}
/**
* checks if a bridge is set above the ground of this tile
* @param t The tile to analyze
* @pre MayHaveBridgeAbove(t)
* @return true if a bridge is detected above
*/
static inline bool IsBridgeAbove(TileIndex t)
{
assert(MayHaveBridgeAbove(t));
return GB(_m[t].m6, 6, 2) != 0;
}
/**
* Determines the type of bridge on a tile
* @param t The tile to analyze
* @pre IsBridgeTile(t)
* @return The bridge type
*/
static inline BridgeType GetBridgeType(TileIndex t)
{
assert(IsBridgeTile(t));
return GB(_m[t].m6, 2, 4);
}
/**
* Get the axis of the bridge that goes over the tile. Not the axis or the ramp.
* @param t The tile to analyze
* @pre IsBridgeAbove(t)
* @return the above mentioned axis
*/
static inline Axis GetBridgeAxis(TileIndex t)
{
assert(IsBridgeAbove(t));
return (Axis)(GB(_m[t].m6, 6, 2) - 1);
}
/**
* Finds the end of a bridge in the specified direction starting at a middle tile
* @param t the bridge tile to find the bridge ramp for
* @param d the direction to search in
*/
TileIndex GetBridgeEnd(TileIndex t, DiagDirection d);
/**
* Finds the northern end of a bridge starting at a middle tile
* @param t the bridge tile to find the bridge ramp for
*/
TileIndex GetNorthernBridgeEnd(TileIndex t);
/**
* Finds the southern end of a bridge starting at a middle tile
* @param t the bridge tile to find the bridge ramp for
*/
TileIndex GetSouthernBridgeEnd(TileIndex t);
/**
* Starting at one bridge end finds the other bridge end
* @param t the bridge ramp tile to find the other bridge ramp for
*/
TileIndex GetOtherBridgeEnd(TileIndex t);
/**
* Get the height ('z') of a bridge in pixels.
* @param tile the bridge ramp tile to get the bridge height from
* @return the height of the bridge in pixels
*/
uint GetBridgeHeight(TileIndex tile);
/**
* Remove the bridge over the given axis.
* @param t the tile to remove the bridge from
* @param a the axis of the bridge to remove
* @pre MayHaveBridgeAbove(t)
*/
static inline void ClearSingleBridgeMiddle(TileIndex t, Axis a)
{
assert(MayHaveBridgeAbove(t));
ClrBit(_m[t].m6, 6 + a);
}
/**
* Removes bridges from the given, that is bridges along the X and Y axis.
* @param t the tile to remove the bridge from
* @pre MayHaveBridgeAbove(t)
*/
static inline void ClearBridgeMiddle(TileIndex t)
{
ClearSingleBridgeMiddle(t, AXIS_X);
ClearSingleBridgeMiddle(t, AXIS_Y);
}
/**
* Set that there is a bridge over the given axis.
* @param t the tile to add the bridge to
* @param a the axis of the bridge to add
* @pre MayHaveBridgeAbove(t)
*/
static inline void SetBridgeMiddle(TileIndex t, Axis a)
{
assert(MayHaveBridgeAbove(t));
SetBit(_m[t].m6, 6 + a);
}
/**
* Generic part to make a bridge ramp for both roads and rails.
* @param t the tile to make a bridge ramp
* @param o the new owner of the bridge ramp
* @param bridgetype the type of bridge this bridge ramp belongs to
* @param d the direction this ramp must be facing
* @param tt the transport type of the bridge
* @param rt the road or rail type
* @note this function should not be called directly.
*/
static inline void MakeBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, TransportType tt, uint rt)
{
SetTileType(t, MP_TUNNELBRIDGE);
SetTileOwner(t, o);
_m[t].m2 = 0;
_m[t].m3 = rt;
_m[t].m4 = 0;
_m[t].m5 = 1 << 7 | tt << 2 | d;
SB(_m[t].m6, 2, 4, bridgetype);
_me[t].m7 = 0;
}
/**
* Make a bridge ramp for roads.
* @param t the tile to make a bridge ramp
* @param o the new owner of the bridge ramp
* @param bridgetype the type of bridge this bridge ramp belongs to
* @param d the direction this ramp must be facing
* @param r the road type of the bridge
*/
static inline void MakeRoadBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RoadTypes r)
{
MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_ROAD, 0);
SetRoadOwner(t, ROADTYPE_ROAD, o);
if (o != OWNER_TOWN) SetRoadOwner(t, ROADTYPE_TRAM, o);
SetRoadTypes(t, r);
}
/**
* Make a bridge ramp for rails.
* @param t the tile to make a bridge ramp
* @param o the new owner of the bridge ramp
* @param bridgetype the type of bridge this bridge ramp belongs to
* @param d the direction this ramp must be facing
* @param r the rail type of the bridge
*/
static inline void MakeRailBridgeRamp(TileIndex t, Owner o, BridgeType bridgetype, DiagDirection d, RailType r)
{
MakeBridgeRamp(t, o, bridgetype, d, TRANSPORT_RAIL, r);
}
/**
* Make a bridge ramp for aqueducts.
* @param t the tile to make a bridge ramp
* @param o the new owner of the bridge ramp
* @param d the direction this ramp must be facing
*/
static inline void MakeAqueductBridgeRamp(TileIndex t, Owner o, DiagDirection d)
{
MakeBridgeRamp(t, o, 0, d, TRANSPORT_WATER, 0);
}
#endif /* BRIDGE_MAP_H */
|
