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annotate src/rail.cpp @ 7703:b20195746c34 draft

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(svn r11237) -Codechange: reduce code duplication between GetRailFoundation() and CheckRailSlope(). Patch by frosch.
author rubidium <rubidium@openttd.org>
date Tue, 09 Oct 2007 21:11:23 +0000
parents fba35a9abf79
children b2ca338938ed
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1 /* $Id$ */
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2
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3 /** @file rail.cpp */
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4
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5 #include "stdafx.h"
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6 #include "openttd.h"
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7 #include "bridge_map.h"
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8 #include "rail.h"
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9 #include "station_map.h"
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10 #include "tunnel_map.h"
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12 /* XXX: Below 3 tables store duplicate data. Maybe remove some? */
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13 /* Maps a trackdir to the bit that stores its status in the map arrays, in the
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14 * direction along with the trackdir */
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15 extern const byte _signal_along_trackdir[] = {
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16 0x8, 0x8, 0x8, 0x2, 0x4, 0x1, 0, 0,
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17 0x4, 0x4, 0x4, 0x1, 0x8, 0x2
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18 };
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20 /* Maps a trackdir to the bit that stores its status in the map arrays, in the
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21 * direction against the trackdir */
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22 extern const byte _signal_against_trackdir[] = {
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23 0x4, 0x4, 0x4, 0x1, 0x8, 0x2, 0, 0,
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24 0x8, 0x8, 0x8, 0x2, 0x4, 0x1
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25 };
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27 /* Maps a Track to the bits that store the status of the two signals that can
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28 * be present on the given track */
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29 extern const byte _signal_on_track[] = {
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30 0xC, 0xC, 0xC, 0x3, 0xC, 0x3
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31 };
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33 /* Maps a diagonal direction to the all trackdirs that are connected to any
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34 * track entering in this direction (including those making 90 degree turns)
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35 */
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36 extern const TrackdirBits _exitdir_reaches_trackdirs[] = {
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37 TRACKDIR_BIT_X_NE | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_LEFT_N, /* DIAGDIR_NE */
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38 TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_LEFT_S | TRACKDIR_BIT_UPPER_E, /* DIAGDIR_SE */
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39 TRACKDIR_BIT_X_SW | TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_RIGHT_S, /* DIAGDIR_SW */
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40 TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_W /* DIAGDIR_NW */
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41 };
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42
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43 extern const Trackdir _next_trackdir[] = {
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44 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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45 TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_LOWER_W, TRACKDIR_UPPER_W, TRACKDIR_RIGHT_N, TRACKDIR_LEFT_N
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46 };
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47
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48 /* Maps a trackdir to all trackdirs that make 90 deg turns with it. */
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49 extern const TrackdirBits _track_crosses_trackdirs[] = {
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50 TRACKDIR_BIT_Y_SE | TRACKDIR_BIT_Y_NW, /* TRACK_X */
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51 TRACKDIR_BIT_X_NE | TRACKDIR_BIT_X_SW, /* TRACK_Y */
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52 TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LEFT_S, /* TRACK_UPPER */
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53 TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LEFT_S, /* TRACK_LOWER */
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54 TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E, /* TRACK_LEFT */
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55 TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_LOWER_E /* TRACK_RIGHT */
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56 };
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57
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58 /* Maps a track to all tracks that make 90 deg turns with it. */
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59 extern const TrackBits _track_crosses_tracks[] = {
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60 TRACK_BIT_Y, /* TRACK_X */
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61 TRACK_BIT_X, /* TRACK_Y */
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62 TRACK_BIT_VERT, /* TRACK_UPPER */
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63 TRACK_BIT_VERT, /* TRACK_LOWER */
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64 TRACK_BIT_HORZ, /* TRACK_LEFT */
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65 TRACK_BIT_HORZ /* TRACK_RIGHT */
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66 };
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67
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68 /* Maps a trackdir to the (4-way) direction the tile is exited when following
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69 * that trackdir */
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70 extern const DiagDirection _trackdir_to_exitdir[] = {
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71 DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_NE,
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72 DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE,
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73 };
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74
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75 extern const Trackdir _track_exitdir_to_trackdir[][DIAGDIR_END] = {
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76 {TRACKDIR_X_NE, INVALID_TRACKDIR, TRACKDIR_X_SW, INVALID_TRACKDIR},
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77 {INVALID_TRACKDIR, TRACKDIR_Y_SE, INVALID_TRACKDIR, TRACKDIR_Y_NW},
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78 {TRACKDIR_UPPER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_W},
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79 {INVALID_TRACKDIR, TRACKDIR_LOWER_E, TRACKDIR_LOWER_W, INVALID_TRACKDIR},
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80 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LEFT_S, TRACKDIR_LEFT_N},
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81 {TRACKDIR_RIGHT_N, TRACKDIR_RIGHT_S, INVALID_TRACKDIR, INVALID_TRACKDIR}
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82 };
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83
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84 extern const Trackdir _track_enterdir_to_trackdir[][DIAGDIR_END] = {
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85 {TRACKDIR_X_NE, INVALID_TRACKDIR, TRACKDIR_X_SW, INVALID_TRACKDIR},
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86 {INVALID_TRACKDIR, TRACKDIR_Y_SE, INVALID_TRACKDIR, TRACKDIR_Y_NW},
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87 {INVALID_TRACKDIR, TRACKDIR_UPPER_E, TRACKDIR_UPPER_W, INVALID_TRACKDIR},
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88 {TRACKDIR_LOWER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_W},
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89 {TRACKDIR_LEFT_N, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR},
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90 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_RIGHT_S, TRACKDIR_RIGHT_N}
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91 };
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92
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93 extern const Trackdir _track_direction_to_trackdir[][DIR_END] = {
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94 {INVALID_TRACKDIR, TRACKDIR_X_NE, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_X_SW, INVALID_TRACKDIR, INVALID_TRACKDIR},
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95 {INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_Y_SE, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_Y_NW},
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KUDr <KUDr@openttd.org>
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96 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_UPPER_W, INVALID_TRACKDIR},
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97 {INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_W, INVALID_TRACKDIR},
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98 {TRACKDIR_LEFT_N, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR},
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99 {TRACKDIR_RIGHT_N, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_RIGHT_S, INVALID_TRACKDIR, INVALID_TRACKDIR, INVALID_TRACKDIR}
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100 };
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101
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c44c070c5032 (svn r8038) -Merge: the cpp branch. Effort of KUDr, Celestar, glx, Smoovius, stillunknown and pv2b.
rubidium <rubidium@openttd.org>
parents: 5584
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102 extern const Trackdir _dir_to_diag_trackdir[] = {
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103 TRACKDIR_X_NE, TRACKDIR_Y_SE, TRACKDIR_X_SW, TRACKDIR_Y_NW,
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104 };
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105
7703
b20195746c34 (svn r11237) -Codechange: reduce code duplication between GetRailFoundation() and CheckRailSlope(). Patch by frosch.
rubidium <rubidium@openttd.org>
parents: 7370
diff changeset
106 extern const TrackBits _corner_to_trackbits[] = {
b20195746c34 (svn r11237) -Codechange: reduce code duplication between GetRailFoundation() and CheckRailSlope(). Patch by frosch.
rubidium <rubidium@openttd.org>
parents: 7370
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107 TRACK_BIT_LEFT, TRACK_BIT_LOWER, TRACK_BIT_RIGHT, TRACK_BIT_UPPER,
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rubidium <rubidium@openttd.org>
parents: 7370
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108 };
b20195746c34 (svn r11237) -Codechange: reduce code duplication between GetRailFoundation() and CheckRailSlope(). Patch by frosch.
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parents: 7370
diff changeset
109
5584
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110
6154
238db87ae59e (svn r8899) -Fix
tron <tron@openttd.org>
parents: 5587
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111 RailType GetTileRailType(TileIndex tile)
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112 {
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113 switch (GetTileType(tile)) {
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114 case MP_RAILWAY:
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115 return GetRailType(tile);
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116
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fba35a9abf79 (svn r10733) -Codechange: change MP_STREET into MP_ROAD as we use the word "road" everywhere except in the tile type.
rubidium <rubidium@openttd.org>
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117 case MP_ROAD:
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118 /* rail/road crossing */
6172
b3b8cbc5e854 (svn r8935) -Codechange: unification of track type between road and rail tiles, unification of ground type between normal rail tiles and depots/waypoints and removing the need for RailTileSubType.
rubidium <rubidium@openttd.org>
parents: 6154
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119 if (IsLevelCrossing(tile)) return GetRailType(tile);
5584
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120 break;
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121
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122 case MP_STATION:
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123 if (IsRailwayStationTile(tile)) return GetRailType(tile);
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124 break;
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125
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126 case MP_TUNNELBRIDGE:
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127 if (IsTunnel(tile)) {
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128 if (GetTunnelTransportType(tile) == TRANSPORT_RAIL) return GetRailType(tile);
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129 } else {
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130 if (GetBridgeTransportType(tile) == TRANSPORT_RAIL) return GetRailType(tile);
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131 }
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KUDr <KUDr@openttd.org>
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132 break;
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parents:
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133
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134 default:
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KUDr <KUDr@openttd.org>
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135 break;
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KUDr <KUDr@openttd.org>
parents:
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136 }
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137 return INVALID_RAILTYPE;
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KUDr <KUDr@openttd.org>
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138 }