summaryrefslogtreecommitdiff
path: root/src/roadveh.h
blob: faaadab35543eee0050a893f399de2f95c7040ad (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
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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/* $Id$ */

/*
 * 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 src/roadveh.h Road vehicle states */

#ifndef ROADVEH_H
#define ROADVEH_H

#include "ground_vehicle.hpp"
#include "engine_base.h"
#include "cargotype.h"
#include "track_func.h"
#include "road_type.h"
#include "newgrf_properties.h"
#include "newgrf_engine.h"

struct RoadVehicle;

/** Road vehicle states */
enum RoadVehicleStates {
	/*
	 * Lower 4 bits are used for vehicle track direction. (Trackdirs)
	 * When in a road stop (bit 5 or bit 6 set) these bits give the
	 * track direction of the entry to the road stop.
	 * As the entry direction will always be a diagonal
	 * direction (X_NE, Y_SE, X_SW or Y_NW) only bits 0 and 3
	 * are needed to hold this direction. Bit 1 is then used to show
	 * that the vehicle is using the second road stop bay.
	 * Bit 2 is then used for drive-through stops to show the vehicle
	 * is stopping at this road stop.
	 */

	/* Numeric values */
	RVSB_IN_DEPOT                = 0xFE,                      ///< The vehicle is in a depot
	RVSB_WORMHOLE                = 0xFF,                      ///< The vehicle is in a tunnel and/or bridge

	/* Bit numbers */
	RVS_USING_SECOND_BAY         =    1,                      ///< Only used while in a road stop
	RVS_DRIVE_SIDE               =    4,                      ///< Only used when retrieving move data
	RVS_IN_ROAD_STOP             =    5,                      ///< The vehicle is in a road stop
	RVS_IN_DT_ROAD_STOP          =    6,                      ///< The vehicle is in a drive-through road stop

	/* Bit sets of the above specified bits */
	RVSB_IN_ROAD_STOP            = 1 << RVS_IN_ROAD_STOP,     ///< The vehicle is in a road stop
	RVSB_IN_ROAD_STOP_END        = RVSB_IN_ROAD_STOP + TRACKDIR_END,
	RVSB_IN_DT_ROAD_STOP         = 1 << RVS_IN_DT_ROAD_STOP,  ///< The vehicle is in a drive-through road stop
	RVSB_IN_DT_ROAD_STOP_END     = RVSB_IN_DT_ROAD_STOP + TRACKDIR_END,

	RVSB_TRACKDIR_MASK           = 0x0F,                      ///< The mask used to extract track dirs
	RVSB_ROAD_STOP_TRACKDIR_MASK = 0x09                       ///< Only bits 0 and 3 are used to encode the trackdir for road stops
};

/** State information about the Road Vehicle controller */
static const uint RDE_NEXT_TILE = 0x80; ///< We should enter the next tile
static const uint RDE_TURNED    = 0x40; ///< We just finished turning

/* Start frames for when a vehicle enters a tile/changes its state.
 * The start frame is different for vehicles that turned around or
 * are leaving the depot as the do not start at the edge of the tile.
 * For trams there are a few different start frames as there are two
 * places where trams can turn. */
static const uint RVC_DEFAULT_START_FRAME                =  0;
static const uint RVC_TURN_AROUND_START_FRAME            =  1;
static const uint RVC_DEPOT_START_FRAME                  =  6;
static const uint RVC_START_FRAME_AFTER_LONG_TRAM        = 21;
static const uint RVC_TURN_AROUND_START_FRAME_SHORT_TRAM = 16;
/* Stop frame for a vehicle in a drive-through stop */
static const uint RVC_DRIVE_THROUGH_STOP_FRAME           = 11;
static const uint RVC_DEPOT_STOP_FRAME                   = 11;

enum RoadVehicleSubType {
	RVST_FRONT,
	RVST_ARTIC_PART,
};


void RoadVehUpdateCache(RoadVehicle *v);

/** Cached oftenly queried (NewGRF) values */
struct RoadVehicleCache {
	uint16 cached_total_length; ///< Length of the whole train, valid only for first engine.
	byte cached_veh_length;     ///< length of this vehicle in units of 1/8 of normal length, cached because this can be set by a callback
	EngineID first_engine;      ///< Cached EngineID of the front vehicle. INVALID_ENGINE for the front vehicle itself.
};

/**
 * Buses, trucks and trams belong to this class.
 */
struct RoadVehicle : public GroundVehicle<RoadVehicle, VEH_ROAD> {
	RoadVehicleCache rcache; ///< Cache of often used calculated values
	byte state;             ///< @see RoadVehicleStates
	byte frame;
	uint16 blocked_ctr;
	byte overtaking;
	byte overtaking_ctr;
	uint16 crashed_ctr;
	byte reverse_ctr;

	RoadType roadtype;
	RoadTypes compatible_roadtypes;

	/** We don't want GCC to zero our struct! It already is zeroed and has an index! */
	RoadVehicle() : GroundVehicle<RoadVehicle, VEH_ROAD>() {}
	/** We want to 'destruct' the right class. */
	virtual ~RoadVehicle() { this->PreDestructor(); }

	friend struct GroundVehicle<RoadVehicle, VEH_ROAD>; // GroundVehicle needs to use the acceleration functions defined at RoadVehicle.

	const char *GetTypeString() const { return "road vehicle"; }
	void MarkDirty();
	void UpdateDeltaXY(Direction direction);
	ExpensesType GetExpenseType(bool income) const { return income ? EXPENSES_ROADVEH_INC : EXPENSES_ROADVEH_RUN; }
	bool IsPrimaryVehicle() const { return this->IsRoadVehFront(); }
	SpriteID GetImage(Direction direction) const;
	int GetDisplaySpeed() const { return this->cur_speed / 2; }
	int GetDisplayMaxSpeed() const { return this->vcache.cached_max_speed / 2; }
	Money GetRunningCost() const;
	int GetDisplayImageWidth(Point *offset = NULL) const;
	bool IsInDepot() const { return this->state == RVSB_IN_DEPOT; }
	bool IsStoppedInDepot() const;
	bool Tick();
	void OnNewDay();
	uint Crash(bool flooded = false);
	Trackdir GetVehicleTrackdir() const;
	TileIndex GetOrderStationLocation(StationID station);
	bool FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse);

	bool IsBus() const;

	int GetCurrentMaxSpeed() const;

	/**
	 * Check if vehicle is a front engine
	 * @return Returns true if vehicle is a front engine
	 */
	FORCEINLINE bool IsRoadVehFront() const { return this->subtype == RVST_FRONT; }

	/**
	 * Set front engine state
	 */
	FORCEINLINE void SetRoadVehFront() { this->subtype = RVST_FRONT; }

	/**
	 * Check if vehicl is an articulated part of an engine
	 * @return Returns true if vehicle is an articulated part
	 */
	FORCEINLINE bool IsArticulatedPart() const { return this->subtype == RVST_ARTIC_PART; }

	/**
	 * Set a vehicle to be an articulated part
	 */
	FORCEINLINE void SetArticulatedPart() { this->subtype = RVST_ARTIC_PART; }

	/**
	 * Check if an engine has an articulated part.
	 * @return True if the engine has an articulated part.
	 */
	FORCEINLINE bool HasArticulatedPart() const { return this->Next() != NULL && this->Next()->IsArticulatedPart(); }

protected: // These functions should not be called outside acceleration code.

	/**
	 * Allows to know the power value that this vehicle will use.
	 * @return Power value from the engine in HP, or zero if the vehicle is not powered.
	 */
	FORCEINLINE uint16 GetPower() const
	{
		/* Power is not added for articulated parts */
		if (!this->IsArticulatedPart()) {
			/* Road vehicle power is in units of 10 HP. */
			return 10 * GetVehicleProperty(this, PROP_ROADVEH_POWER, RoadVehInfo(this->engine_type)->power);
		}
		return 0;
	}

	/**
	 * Returns a value if this articulated part is powered.
	 * @return Zero, because road vehicles don't have powered parts.
	 */
	FORCEINLINE uint16 GetPoweredPartPower(const RoadVehicle *head) const
	{
		return 0;
	}

	/**
	 * Allows to know the weight value that this vehicle will use.
	 * @return Weight value from the engine in tonnes.
	 */
	FORCEINLINE uint16 GetWeight() const
	{
		uint16 weight = (CargoSpec::Get(this->cargo_type)->weight * this->cargo.Count()) / 16;

		/* Vehicle weight is not added for articulated parts. */
		if (!this->IsArticulatedPart()) {
			/* Road vehicle weight is in units of 1/4 t. */
			weight += GetVehicleProperty(this, PROP_ROADVEH_WEIGHT, RoadVehInfo(this->engine_type)->weight) / 4;
		}

		return weight;
	}

	/**
	 * Allows to know the tractive effort value that this vehicle will use.
	 * @return Tractive effort value from the engine.
	 */
	FORCEINLINE byte GetTractiveEffort() const
	{
		/* The tractive effort coefficient is in units of 1/256.  */
		return GetVehicleProperty(this, PROP_ROADVEH_TRACTIVE_EFFORT, RoadVehInfo(this->engine_type)->tractive_effort);
	}

	/**
	 * Gets the area used for calculating air drag.
	 * @return Area of the engine in m^2.
	 */
	FORCEINLINE byte GetAirDragArea() const
	{
		return 6;
	}

	/**
	 * Gets the air drag coefficient of this vehicle.
	 * @return Air drag value from the engine.
	 */
	FORCEINLINE byte GetAirDrag() const
	{
		return RoadVehInfo(this->engine_type)->air_drag;
	}

	/**
	 * Checks the current acceleration status of this vehicle.
	 * @return Acceleration status.
	 */
	FORCEINLINE AccelStatus GetAccelerationStatus() const
	{
		return (this->vehstatus & VS_STOPPED) ? AS_BRAKE : AS_ACCEL;
	}

	/**
	 * Calculates the current speed of this vehicle.
	 * @return Current speed in km/h-ish.
	 */
	FORCEINLINE uint16 GetCurrentSpeed() const
	{
		return this->cur_speed / 2;
	}

	/**
	 * Returns the rolling friction coefficient of this vehicle.
	 * @return Rolling friction coefficient in [1e-4].
	 */
	FORCEINLINE uint32 GetRollingFriction() const
	{
		/* Trams have a slightly greater friction coefficient than trains.
		 * The rest of road vehicles have bigger values. */
		uint32 coeff = (this->roadtype == ROADTYPE_TRAM) ? 40 : 75;
		/* The friction coefficient increases with speed in a way that
		 * it doubles at 128 km/h, triples at 256 km/h and so on. */
		return coeff * (128 + this->GetCurrentSpeed()) / 128;
	}

	/**
	 * Allows to know the acceleration type of a vehicle.
	 * @return Zero, road vehicles always use a normal acceleration method.
	 */
	FORCEINLINE int GetAccelerationType() const
	{
		return 0;
	}

	/**
	 * Returns the slope steepness used by this vehicle.
	 * @return Slope steepness used by the vehicle.
	 */
	FORCEINLINE uint32 GetSlopeSteepness() const
	{
		return _settings_game.vehicle.roadveh_slope_steepness;
	}

	/**
	 * Gets the maximum speed allowed by the track for this vehicle.
	 * @return Since roads don't limit road vehicle speed, it returns always zero.
	 */
	FORCEINLINE uint16 GetMaxTrackSpeed() const
	{
		return 0;
	}

	/**
	 * Checks if the vehicle is at a tile that can be sloped.
	 * @return True if the tile can be sloped.
	 */
	FORCEINLINE bool TileMayHaveSlopedTrack() const
	{
		TrackStatus ts = GetTileTrackStatus(this->tile, TRANSPORT_ROAD, this->compatible_roadtypes);
		TrackBits trackbits = TrackStatusToTrackBits(ts);

		return trackbits == TRACK_BIT_X || trackbits == TRACK_BIT_Y;
	}
};

#define FOR_ALL_ROADVEHICLES(var) FOR_ALL_VEHICLES_OF_TYPE(RoadVehicle, var)

#endif /* ROADVEH_H */