road.cpp
Go to the documentation of this file.00001
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00012 #include "stdafx.h"
00013 #include "openttd.h"
00014 #include "rail_map.h"
00015 #include "road_map.h"
00016 #include "water_map.h"
00017 #include "genworld.h"
00018 #include "company_func.h"
00019 #include "company_base.h"
00020 #include "engine_base.h"
00021 #include "date_func.h"
00022 #include "landscape.h"
00023
00031 static bool IsPossibleCrossing(const TileIndex tile, Axis ax)
00032 {
00033 return (IsTileType(tile, MP_RAILWAY) &&
00034 GetRailTileType(tile) == RAIL_TILE_NORMAL &&
00035 GetTrackBits(tile) == (ax == AXIS_X ? TRACK_BIT_Y : TRACK_BIT_X) &&
00036 GetFoundationSlope(tile, NULL) == SLOPE_FLAT);
00037 }
00038
00045 RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
00046 {
00047 if (!IsValidTile(tile)) return ROAD_NONE;
00048 for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
00049 const TileIndex neighbor_tile = TileAddByDiagDir(tile, dir);
00050
00051
00052 const RoadBits target_rb = DiagDirToRoadBits(dir);
00053
00054
00055 if (org_rb & target_rb) {
00056 bool connective = false;
00057 const RoadBits mirrored_rb = MirrorRoadBits(target_rb);
00058
00059 switch (GetTileType(neighbor_tile)) {
00060
00061 case MP_CLEAR: case MP_TREES:
00062 connective = true;
00063 break;
00064
00065
00066 case MP_TUNNELBRIDGE:
00067 case MP_STATION:
00068 case MP_ROAD: {
00069 const RoadBits neighbor_rb = GetAnyRoadBits(neighbor_tile, ROADTYPE_ROAD) | GetAnyRoadBits(neighbor_tile, ROADTYPE_TRAM);
00070
00071
00072 connective = (neighbor_rb & mirrored_rb) ||
00073 HasExactlyOneBit(neighbor_rb);
00074
00075 break;
00076 }
00077
00078 case MP_RAILWAY:
00079 connective = IsPossibleCrossing(neighbor_tile, DiagDirToAxis(dir));
00080 break;
00081
00082 case MP_WATER:
00083
00084 connective = !IsWater(neighbor_tile);
00085 break;
00086
00087
00088 default: break;
00089 }
00090
00091
00092 if (!connective) org_rb ^= target_rb;
00093
00094 }
00095 }
00096
00097 return org_rb;
00098 }
00099
00106 bool HasRoadTypesAvail(const CompanyID company, const RoadTypes rts)
00107 {
00108 RoadTypes avail_roadtypes;
00109
00110 if (company == OWNER_TOWN || _game_mode == GM_EDITOR || IsGeneratingWorld()) {
00111 avail_roadtypes = ROADTYPES_ROAD;
00112 } else {
00113 Company *c = Company::GetIfValid(company);
00114 if (c == NULL) return false;
00115 avail_roadtypes = (RoadTypes)c->avail_roadtypes | ROADTYPES_ROAD;
00116 }
00117 return (rts & ~avail_roadtypes) == 0;
00118 }
00119
00125 bool ValParamRoadType(const RoadType rt)
00126 {
00127 return HasRoadTypesAvail(_current_company, RoadTypeToRoadTypes(rt));
00128 }
00129
00135 RoadTypes GetCompanyRoadtypes(CompanyID company)
00136 {
00137 RoadTypes rt = ROADTYPES_NONE;
00138
00139 Engine *e;
00140 FOR_ALL_ENGINES_OF_TYPE(e, VEH_ROAD) {
00141 const EngineInfo *ei = &e->info;
00142
00143 if (HasBit(ei->climates, _settings_game.game_creation.landscape) &&
00144 (HasBit(e->company_avail, company) || _date >= e->intro_date + DAYS_IN_YEAR)) {
00145 SetBit(rt, HasBit(ei->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
00146 }
00147 }
00148
00149 return rt;
00150 }