OpenTTD Source  20241108-master-g80f628063a
clear_map.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 #ifndef CLEAR_MAP_H
11 #define CLEAR_MAP_H
12 
13 #include "bridge_map.h"
14 #include "industry_type.h"
15 
24  CLEAR_SNOW = 4,
26 };
27 
28 
35 inline bool IsSnowTile(Tile t)
36 {
37  assert(IsTileType(t, MP_CLEAR));
38  return HasBit(t.m3(), 4);
39 }
40 
48 {
49  assert(IsTileType(t, MP_CLEAR));
50  return (ClearGround)GB(t.m5(), 2, 3);
51 }
52 
60 {
61  if (IsSnowTile(t)) return CLEAR_SNOW;
62  return GetRawClearGround(t);
63 }
64 
71 inline bool IsClearGround(Tile t, ClearGround ct)
72 {
73  return GetClearGround(t) == ct;
74 }
75 
76 
83 inline uint GetClearDensity(Tile t)
84 {
85  assert(IsTileType(t, MP_CLEAR));
86  return GB(t.m5(), 0, 2);
87 }
88 
95 inline void AddClearDensity(Tile t, int d)
96 {
97  assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
98  t.m5() += d;
99 }
100 
107 inline void SetClearDensity(Tile t, uint d)
108 {
109  assert(IsTileType(t, MP_CLEAR));
110  SB(t.m5(), 0, 2, d);
111 }
112 
113 
120 inline uint GetClearCounter(Tile t)
121 {
122  assert(IsTileType(t, MP_CLEAR));
123  return GB(t.m5(), 5, 3);
124 }
125 
132 inline void AddClearCounter(Tile t, int c)
133 {
134  assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
135  t.m5() += c << 5;
136 }
137 
144 inline void SetClearCounter(Tile t, uint c)
145 {
146  assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
147  SB(t.m5(), 5, 3, c);
148 }
149 
150 
158 inline void SetClearGroundDensity(Tile t, ClearGround type, uint density)
159 {
160  assert(IsTileType(t, MP_CLEAR)); // XXX incomplete
161  t.m5() = 0 << 5 | type << 2 | density;
162 }
163 
164 
171 inline uint GetFieldType(Tile t)
172 {
173  assert(GetClearGround(t) == CLEAR_FIELDS);
174  return GB(t.m3(), 0, 4);
175 }
176 
183 inline void SetFieldType(Tile t, uint f)
184 {
185  assert(GetClearGround(t) == CLEAR_FIELDS); // XXX incomplete
186  SB(t.m3(), 0, 4, f);
187 }
188 
195 inline IndustryID GetIndustryIndexOfField(Tile t)
196 {
197  assert(GetClearGround(t) == CLEAR_FIELDS);
198  return(IndustryID) t.m2();
199 }
200 
207 inline void SetIndustryIndexOfField(Tile t, IndustryID i)
208 {
209  assert(GetClearGround(t) == CLEAR_FIELDS);
210  t.m2() = i;
211 }
212 
213 
221 inline uint GetFence(Tile t, DiagDirection side)
222 {
223  assert(IsClearGround(t, CLEAR_FIELDS));
224  switch (side) {
225  default: NOT_REACHED();
226  case DIAGDIR_SE: return GB(t.m4(), 2, 3);
227  case DIAGDIR_SW: return GB(t.m4(), 5, 3);
228  case DIAGDIR_NE: return GB(t.m3(), 5, 3);
229  case DIAGDIR_NW: return GB(t.m6(), 2, 3);
230  }
231 }
232 
240 inline void SetFence(Tile t, DiagDirection side, uint h)
241 {
242  assert(IsClearGround(t, CLEAR_FIELDS));
243  switch (side) {
244  default: NOT_REACHED();
245  case DIAGDIR_SE: SB(t.m4(), 2, 3, h); break;
246  case DIAGDIR_SW: SB(t.m4(), 5, 3, h); break;
247  case DIAGDIR_NE: SB(t.m3(), 5, 3, h); break;
248  case DIAGDIR_NW: SB(t.m6(), 2, 3, h); break;
249  }
250 }
251 
252 
259 inline void MakeClear(Tile t, ClearGround g, uint density)
260 {
261  SetTileType(t, MP_CLEAR);
262  t.m1() = 0;
264  t.m2() = 0;
265  t.m3() = 0;
266  t.m4() = 0 << 5 | 0 << 2;
267  SetClearGroundDensity(t, g, density); // Sets m5
268  t.m6() = 0;
269  t.m7() = 0;
270  t.m8() = 0;
271 }
272 
273 
280 inline void MakeField(Tile t, uint field_type, IndustryID industry)
281 {
282  SetTileType(t, MP_CLEAR);
283  t.m1() = 0;
285  t.m2() = industry;
286  t.m3() = field_type;
287  t.m4() = 0 << 5 | 0 << 2;
289  SB(t.m6(), 2, 4, 0);
290  t.m7() = 0;
291  t.m8() = 0;
292 }
293 
300 inline void MakeSnow(Tile t, uint density = 0)
301 {
302  assert(GetClearGround(t) != CLEAR_SNOW);
303  SetBit(t.m3(), 4);
304  if (GetRawClearGround(t) == CLEAR_FIELDS) {
305  SetClearGroundDensity(t, CLEAR_GRASS, density);
306  } else {
307  SetClearDensity(t, density);
308  }
309 }
310 
316 inline void ClearSnow(Tile t)
317 {
318  assert(GetClearGround(t) == CLEAR_SNOW);
319  ClrBit(t.m3(), 4);
320  SetClearDensity(t, 3);
321 }
322 
323 #endif /* CLEAR_MAP_H */
constexpr debug_inline bool HasBit(const T x, const uint8_t y)
Checks if a bit in a value is set.
constexpr T SB(T &x, const uint8_t s, const uint8_t n, const U d)
Set n bits in x starting at bit s to d.
constexpr T SetBit(T &x, const uint8_t y)
Set a bit in a variable.
constexpr static debug_inline uint GB(const T x, const uint8_t s, const uint8_t n)
Fetch n bits from x, started at bit s.
constexpr T ClrBit(T &x, const uint8_t y)
Clears a bit in a variable.
Map accessor functions for bridges.
Wrapper class to abstract away the way the tiles are stored.
Definition: map_func.h:25
debug_inline uint16_t & m8()
General purpose.
Definition: map_func.h:197
debug_inline uint8_t & m7()
Primarily used for newgrf support.
Definition: map_func.h:185
debug_inline uint8_t & m5()
General purpose.
Definition: map_func.h:161
debug_inline uint8_t & m1()
Primarily used for ownership information.
Definition: map_func.h:113
debug_inline uint8_t & m4()
General purpose.
Definition: map_func.h:149
debug_inline uint16_t & m2()
Primarily used for indices to towns, industries and stations.
Definition: map_func.h:125
debug_inline uint8_t & m6()
General purpose.
Definition: map_func.h:173
debug_inline uint8_t & m3()
General purpose.
Definition: map_func.h:137
void SetFieldType(Tile t, uint f)
Set the field type (production stage) of the field.
Definition: clear_map.h:183
ClearGround GetRawClearGround(Tile t)
Get the type of clear tile but never return CLEAR_SNOW.
Definition: clear_map.h:47
void AddClearCounter(Tile t, int c)
Increments the counter used to advance to the next clear density/field type.
Definition: clear_map.h:132
uint GetFieldType(Tile t)
Get the field type (production stage) of the field.
Definition: clear_map.h:171
void AddClearDensity(Tile t, int d)
Increment the density of a non-field clear tile.
Definition: clear_map.h:95
void SetClearDensity(Tile t, uint d)
Set the density of a non-field clear tile.
Definition: clear_map.h:107
void ClearSnow(Tile t)
Clear the snow from a tile and return it to its previous type.
Definition: clear_map.h:316
bool IsClearGround(Tile t, ClearGround ct)
Set the type of clear tile.
Definition: clear_map.h:71
ClearGround
Ground types.
Definition: clear_map.h:19
@ CLEAR_GRASS
0-3
Definition: clear_map.h:20
@ CLEAR_FIELDS
3
Definition: clear_map.h:23
@ CLEAR_DESERT
1,3
Definition: clear_map.h:25
@ CLEAR_SNOW
0-3
Definition: clear_map.h:24
@ CLEAR_ROUGH
3
Definition: clear_map.h:21
@ CLEAR_ROCKS
3
Definition: clear_map.h:22
void MakeSnow(Tile t, uint density=0)
Make a snow tile.
Definition: clear_map.h:300
void SetFence(Tile t, DiagDirection side, uint h)
Sets the type of fence (and whether there is one) for the given border.
Definition: clear_map.h:240
IndustryID GetIndustryIndexOfField(Tile t)
Get the industry (farm) that made the field.
Definition: clear_map.h:195
void MakeClear(Tile t, ClearGround g, uint density)
Make a clear tile.
Definition: clear_map.h:259
ClearGround GetClearGround(Tile t)
Get the type of clear tile.
Definition: clear_map.h:59
void SetIndustryIndexOfField(Tile t, IndustryID i)
Set the industry (farm) that made the field.
Definition: clear_map.h:207
void MakeField(Tile t, uint field_type, IndustryID industry)
Make a (farm) field tile.
Definition: clear_map.h:280
void SetClearCounter(Tile t, uint c)
Sets the counter used to advance to the next clear density/field type.
Definition: clear_map.h:144
void SetClearGroundDensity(Tile t, ClearGround type, uint density)
Sets ground type and density in one go, also sets the counter to 0.
Definition: clear_map.h:158
uint GetFence(Tile t, DiagDirection side)
Is there a fence at the given border?
Definition: clear_map.h:221
uint GetClearCounter(Tile t)
Get the counter used to advance to the next clear density/field type.
Definition: clear_map.h:120
bool IsSnowTile(Tile t)
Test if a tile is covered with snow.
Definition: clear_map.h:35
uint GetClearDensity(Tile t)
Get the density of a non-field clear tile.
Definition: clear_map.h:83
@ OWNER_NONE
The tile has no ownership.
Definition: company_type.h:25
DiagDirection
Enumeration for diagonal directions.
@ DIAGDIR_NE
Northeast, upper right on your monitor.
@ DIAGDIR_NW
Northwest.
@ DIAGDIR_SE
Southeast.
@ DIAGDIR_SW
Southwest.
Types related to the industry.
void SetTileType(Tile tile, TileType type)
Set the type of a tile.
Definition: tile_map.h:131
void SetTileOwner(Tile tile, Owner owner)
Sets the owner of a tile.
Definition: tile_map.h:198
static debug_inline bool IsTileType(Tile tile, TileType type)
Checks if a tile is a given tiletype.
Definition: tile_map.h:150
@ MP_CLEAR
A tile without any structures, i.e. grass, rocks, farm fields etc.
Definition: tile_type.h:48