1 /* $Id$ */ |
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2 |
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3 #include "stdafx.h" |
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4 #include "openttd.h" |
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5 #include "bridge_map.h" |
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6 #include "rail.h" |
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7 #include "station_map.h" |
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8 #include "tunnel_map.h" |
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9 |
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10 /* XXX: Below 3 tables store duplicate data. Maybe remove some? */ |
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11 /* Maps a trackdir to the bit that stores its status in the map arrays, in the |
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12 * direction along with the trackdir */ |
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13 const byte _signal_along_trackdir[] = { |
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14 0x80, 0x80, 0x80, 0x20, 0x40, 0x10, 0, 0, |
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15 0x40, 0x40, 0x40, 0x10, 0x80, 0x20 |
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16 }; |
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17 |
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18 /* Maps a trackdir to the bit that stores its status in the map arrays, in the |
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19 * direction against the trackdir */ |
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20 const byte _signal_against_trackdir[] = { |
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21 0x40, 0x40, 0x40, 0x10, 0x80, 0x20, 0, 0, |
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22 0x80, 0x80, 0x80, 0x20, 0x40, 0x10 |
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23 }; |
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24 |
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25 /* Maps a Track to the bits that store the status of the two signals that can |
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26 * be present on the given track */ |
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27 const byte _signal_on_track[] = { |
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28 0xC0, 0xC0, 0xC0, 0x30, 0xC0, 0x30 |
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29 }; |
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30 |
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31 /* Maps a diagonal direction to the all trackdirs that are connected to any |
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32 * track entering in this direction (including those making 90 degree turns) |
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33 */ |
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34 const TrackdirBits _exitdir_reaches_trackdirs[] = { |
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35 TRACKDIR_BIT_X_NE | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_LEFT_N, /* DIAGDIR_NE */ |
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36 TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_LEFT_S | TRACKDIR_BIT_UPPER_E, /* DIAGDIR_SE */ |
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37 TRACKDIR_BIT_X_SW | TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_RIGHT_S, /* DIAGDIR_SW */ |
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38 TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_W /* DIAGDIR_NW */ |
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39 }; |
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40 |
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41 const Trackdir _next_trackdir[] = { |
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42 TRACKDIR_X_NE, TRACKDIR_Y_SE, TRACKDIR_LOWER_E, TRACKDIR_UPPER_E, TRACKDIR_RIGHT_S, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR, |
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43 TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_LOWER_W, TRACKDIR_UPPER_W, TRACKDIR_RIGHT_N, TRACKDIR_LEFT_N |
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44 }; |
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45 |
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46 /* Maps a trackdir to all trackdirs that make 90 deg turns with it. */ |
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47 const TrackdirBits _track_crosses_trackdirs[] = { |
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48 TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_Y_NW, /* TRACK_X */ |
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49 TRACKDIR_BIT_X_NE | TRACKDIR_BIT_X_SW, /* TRACK_Y */ |
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50 TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LEFT_S, /* TRACK_UPPER */ |
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51 TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LEFT_S, /* TRACK_LOWER */ |
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52 TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E, /* TRACK_LEFT */ |
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53 TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E /* TRACK_RIGHT */ |
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54 }; |
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55 |
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56 /* Maps a track to all tracks that make 90 deg turns with it. */ |
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57 const TrackBits _track_crosses_tracks[] = { |
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58 TRACK_BIT_Y, /* TRACK_X */ |
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59 TRACK_BIT_X, /* TRACK_Y */ |
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60 TRACK_BIT_VERT, /* TRACK_UPPER */ |
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61 TRACK_BIT_VERT, /* TRACK_LOWER */ |
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62 TRACK_BIT_HORZ, /* TRACK_LEFT */ |
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63 TRACK_BIT_HORZ /* TRACK_RIGHT */ |
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64 }; |
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65 |
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66 /* Maps a trackdir to the (4-way) direction the tile is exited when following |
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67 * that trackdir */ |
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68 const DiagDirection _trackdir_to_exitdir[] = { |
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69 DIAGDIR_NE,DIAGDIR_SE,DIAGDIR_NE,DIAGDIR_SE,DIAGDIR_SW,DIAGDIR_SE, DIAGDIR_NE,DIAGDIR_NE, |
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70 DIAGDIR_SW,DIAGDIR_NW,DIAGDIR_NW,DIAGDIR_SW,DIAGDIR_NW,DIAGDIR_NE, |
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71 }; |
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72 |
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73 const Trackdir _track_exitdir_to_trackdir[][DIAGDIR_END] = { |
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74 {TRACKDIR_X_NE, INVALID_TRACKDIR, TRACKDIR_X_SW, INVALID_TRACKDIR}, |
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75 {INVALID_TRACKDIR, TRACKDIR_Y_SE, INVALID_TRACKDIR, TRACKDIR_Y_NW}, |
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76 {TRACKDIR_UPPER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_W}, |
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77 {INVALID_TRACKDIR, TRACKDIR_LOWER_E, TRACKDIR_LOWER_W, INVALID_TRACKDIR}, |
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78 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LEFT_S, TRACKDIR_LEFT_N}, |
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79 {TRACKDIR_RIGHT_N, TRACKDIR_RIGHT_S, INVALID_TRACKDIR, INVALID_TRACKDIR} |
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80 }; |
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81 |
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82 const Trackdir _track_enterdir_to_trackdir[][DIAGDIR_END] = { // TODO: replace magic with enums |
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83 {TRACKDIR_X_NE, INVALID_TRACKDIR, TRACKDIR_X_SW, INVALID_TRACKDIR}, |
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84 {INVALID_TRACKDIR, TRACKDIR_Y_SE, INVALID_TRACKDIR, TRACKDIR_Y_NW}, |
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85 {INVALID_TRACKDIR, TRACKDIR_UPPER_E, TRACKDIR_UPPER_W, INVALID_TRACKDIR}, |
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86 {TRACKDIR_LOWER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_W}, |
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87 {TRACKDIR_LEFT_N, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR}, |
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88 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_RIGHT_S, TRACKDIR_RIGHT_N} |
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89 }; |
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90 |
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91 const Trackdir _track_direction_to_trackdir[][DIR_END] = { |
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92 {INVALID_TRACKDIR, TRACKDIR_X_NE, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_X_SW, INVALID_TRACKDIR, INVALID_TRACKDIR}, |
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93 {INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_Y_SE, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_Y_NW}, |
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94 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_W, INVALID_TRACKDIR}, |
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95 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_W, INVALID_TRACKDIR}, |
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96 {TRACKDIR_LEFT_N, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR}, |
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97 {TRACKDIR_RIGHT_N, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_RIGHT_S, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR} |
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98 }; |
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99 |
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100 const Trackdir _dir_to_diag_trackdir[] = { |
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101 TRACKDIR_X_NE, TRACKDIR_Y_SE, TRACKDIR_X_SW, TRACKDIR_Y_NW, |
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102 }; |
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103 |
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104 |
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105 RailType GetTileRailType(TileIndex tile, Trackdir trackdir) |
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106 { |
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107 switch (GetTileType(tile)) { |
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108 case MP_RAILWAY: |
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109 case MP_RAILWAY_BRIDGE: |
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110 return GetRailType(tile); |
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111 |
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112 case MP_STREET: |
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113 /* rail/road crossing */ |
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114 if (IsLevelCrossing(tile)) return GetRailTypeCrossing(tile); |
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115 break; |
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116 |
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117 case MP_STATION: |
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118 if (IsRailwayStationTile(tile)) return GetRailType(tile); |
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119 break; |
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120 |
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121 case MP_TUNNEL: |
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122 if (GetTunnelTransportType(tile) == TRANSPORT_RAIL) return GetRailType(tile); |
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123 break; |
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124 |
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125 default: |
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126 break; |
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127 } |
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128 return INVALID_RAILTYPE; |
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129 } |
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