# rail.h

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    00001 /* $Id: rail.h 18809 2010-01-15 16:41:15Z rubidium $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * 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.
    00006  * 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.
    00007  * 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/>.
    00008  */
    00009
    00012 #ifndef RAIL_H
    00013 #define RAIL_H
    00014
    00015 #include "rail_type.h"
    00016 #include "track_type.h"
    00017 #include "gfx_type.h"
    00018 #include "core/bitmath_func.hpp"
    00019 #include "economy_func.h"
    00020 #include "slope_type.h"
    00021 #include "strings_type.h"
    00022
    00023 enum RailTypeFlag {
    00024   RTF_CATENARY = 0,
    00025 };
    00026
    00027 enum RailTypeFlags {
    00028   RTFB_NONE     = 0,
    00029   RTFB_CATENARY = 1 << RTF_CATENARY,
    00030 };
    00031 DECLARE_ENUM_AS_BIT_SET(RailTypeFlags);
    00032
    00036 enum RailFenceOffset {
    00037   RFO_FLAT_X,
    00038   RFO_FLAT_Y,
    00039   RFO_FLAT_VERT,
    00040   RFO_FLAT_HORZ,
    00041   RFO_SLOPE_SW,
    00042   RFO_SLOPE_SE,
    00043   RFO_SLOPE_NE,
    00044   RFO_SLOPE_NW,
    00045 };
    00046
    00049 struct RailtypeInfo {
    00052   struct {
    00053     SpriteID track_y;
    00054     SpriteID track_ns;
    00055     SpriteID ground;
    00056     SpriteID single_x;
    00057     SpriteID single_y;
    00058     SpriteID single_n;
    00059     SpriteID single_s;
    00060     SpriteID single_e;
    00061     SpriteID single_w;
    00062     SpriteID single_sloped;
    00063     SpriteID crossing;
    00064     SpriteID tunnel;
    00065   } base_sprites;
    00066
    00069   struct {
    00070     SpriteID build_ns_rail;
    00071     SpriteID build_x_rail;
    00072     SpriteID build_ew_rail;
    00073     SpriteID build_y_rail;
    00074     SpriteID auto_rail;
    00075     SpriteID build_depot;
    00076     SpriteID build_tunnel;
    00077     SpriteID convert_rail;
    00078   } gui_sprites;
    00079
    00080   struct {
    00081     CursorID rail_ns;
    00082     CursorID rail_swne;
    00083     CursorID rail_ew;
    00084     CursorID rail_nwse;
    00085     CursorID autorail;
    00086     CursorID depot;
    00087     CursorID tunnel;
    00088     CursorID convert;
    00089   } cursor;
    00090
    00091   struct {
    00092     StringID toolbar_caption;
    00093     StringID menu_text;
    00094     StringID build_caption;
    00095     StringID replace_text;
    00096     StringID new_loco;
    00097   } strings;
    00098
    00100   SpriteID snow_offset;
    00101
    00103   RailTypes powered_railtypes;
    00104
    00106   RailTypes compatible_railtypes;
    00107
    00116   SpriteID total_offset;
    00117
    00121   SpriteID bridge_offset;
    00122
    00126   byte custom_ground_offset;
    00127
    00131   byte curve_speed;
    00132
    00136   RailTypeFlags flags;
    00137
    00141   uint8 cost_multiplier;
    00142
    00146   uint8 acceleration_type;
    00147
    00151   RailTypeLabel label;
    00152 };
    00153
    00154
    00160 static inline const RailtypeInfo *GetRailTypeInfo(RailType railtype)
    00161 {
    00162   extern RailtypeInfo _railtypes[RAILTYPE_END];
    00163   assert(railtype < RAILTYPE_END);
    00164   return &_railtypes[railtype];
    00165 }
    00166
    00175 static inline bool IsCompatibleRail(RailType enginetype, RailType tiletype)
    00176 {
    00177   return HasBit(GetRailTypeInfo(enginetype)->compatible_railtypes, tiletype);
    00178 }
    00179
    00188 static inline bool HasPowerOnRail(RailType enginetype, RailType tiletype)
    00189 {
    00190   return HasBit(GetRailTypeInfo(enginetype)->powered_railtypes, tiletype);
    00191 }
    00192
    00198 static inline Money RailBuildCost(RailType railtype)
    00199 {
    00200   assert(railtype < RAILTYPE_END);
    00201   return (_price[PR_BUILD_RAIL] * GetRailTypeInfo(railtype)->cost_multiplier) >> 3;
    00202 }
    00203
    00210 static inline Money RailConvertCost(RailType from, RailType to)
    00211 {
    00212   /* rail -> el. rail
    00213    * calculate the price as 5 / 4 of (cost build el. rail) - (cost build rail)
    00214    * (the price of workers to get to place is that 1/4)
    00215    */
    00216   if (HasPowerOnRail(from, to)) {
    00217     Money cost = ((RailBuildCost(to) - RailBuildCost(from)) * 5) >> 2;
    00218     if (cost != 0) return cost;
    00219   }
    00220
    00221   /* el. rail -> rail
    00222    * calculate the price as 1 / 4 of (cost build el. rail) - (cost build rail)
    00223    * (the price of workers is 1 / 4 + price of copper sold to a recycle center)
    00224    */
    00225   if (HasPowerOnRail(to, from)) {
    00226     Money cost = (RailBuildCost(from) - RailBuildCost(to)) >> 2;
    00227     if (cost != 0) return cost;
    00228   }
    00229
    00230   /* make the price the same as remove + build new type */
    00231   return RailBuildCost(to) + _price[PR_CLEAR_RAIL];
    00232 }
    00233
    00234 void DrawTrainDepotSprite(int x, int y, int image, RailType railtype);
    00235 Vehicle *EnsureNoTrainOnTrackProc(Vehicle *v, void *data);
    00236 int TicksToLeaveDepot(const Train *v);
    00237
    00238 Foundation GetRailFoundation(Slope tileh, TrackBits bits);
    00239
    00240
    00247 bool HasRailtypeAvail(const CompanyID company, const RailType railtype);
    00248
    00254 bool ValParamRailtype(const RailType rail);
    00255
    00263 RailType GetBestRailtype(const CompanyID company);
    00264
    00270 RailTypes GetCompanyRailtypes(const CompanyID c);
    00271
    00277 RailType GetRailTypeByLabel(RailTypeLabel label);
    00278
    00282 void ResetRailTypes();
    00283
    00284 #endif /* RAIL_H */