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annotate src/tunnelbridge_map.h @ 12778:bc7926153e19 draft

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(svn r17248) -Fix: add GPL license notice where appropriate
author rubidium <rubidium@openttd.org>
date Fri, 21 Aug 2009 20:21:05 +0000
parents 299da608443d
children a899d4e5ee1a
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1 /* $Id$ */
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2
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3 /*
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4 * This file is part of OpenTTD.
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5 * 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.
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6 * 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.
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7 * 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/>.
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8 */
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9
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10 /** @file tunnelbridge_map.h Functions that have tunnels and bridges in common */
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12 #ifndef TUNNELBRIDGE_MAP_H
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13 #define TUNNELBRIDGE_MAP_H
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14
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15 #include "direction_func.h"
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16 #include "core/bitmath_func.hpp"
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17 #include "tile_map.h"
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18 #include "bridge_map.h"
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19 #include "tunnel_map.h"
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20 #include "transport_type.h"
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21 #include "track_func.h"
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24 /**
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25 * Get the direction pointing to the other end.
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26 *
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27 * Tunnel: Get the direction facing into the tunnel
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28 * Bridge: Get the direction pointing onto the bridge
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29 * @param t The tile to analyze
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30 * @pre IsTileType(t, MP_TUNNELBRIDGE)
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31 * @return the above mentionned direction
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32 */
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33 static inline DiagDirection GetTunnelBridgeDirection(TileIndex t)
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34 {
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35 assert(IsTileType(t, MP_TUNNELBRIDGE));
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36 return (DiagDirection)GB(_m[t].m5, 0, 2);
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37 }
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39 /**
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40 * Tunnel: Get the transport type of the tunnel (road or rail)
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41 * Bridge: Get the transport type of the bridge's ramp
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42 * @param t The tile to analyze
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43 * @pre IsTileType(t, MP_TUNNELBRIDGE)
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44 * @return the transport type in the tunnel/bridge
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45 */
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46 static inline TransportType GetTunnelBridgeTransportType(TileIndex t)
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47 {
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48 assert(IsTileType(t, MP_TUNNELBRIDGE));
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49 return (TransportType)GB(_m[t].m5, 2, 2);
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50 }
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51
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52 /**
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53 * Tunnel: Is this tunnel entrance in a snowy or desert area?
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54 * Bridge: Does the bridge ramp lie in a snow or desert area?
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55 * @param t The tile to analyze
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56 * @pre IsTileType(t, MP_TUNNELBRIDGE)
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57 * @return true if and only if the tile is in a snowy/desert area
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58 */
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59 static inline bool HasTunnelBridgeSnowOrDesert(TileIndex t)
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60 {
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61 assert(IsTileType(t, MP_TUNNELBRIDGE));
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62 return HasBit(_me[t].m7, 5);
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63 }
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64
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65 /**
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66 * Tunnel: Places this tunnel entrance in a snowy or desert area, or takes it out of there.
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67 * Bridge: Sets whether the bridge ramp lies in a snow or desert area.
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68 * @param t the tunnel entrance / bridge ramp tile
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69 * @param snow_or_desert is the entrance/ramp in snow or desert (true), when
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70 * not in snow and not in desert false
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71 * @pre IsTileType(t, MP_TUNNELBRIDGE)
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72 */
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73 static inline void SetTunnelBridgeSnowOrDesert(TileIndex t, bool snow_or_desert)
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74 {
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75 assert(IsTileType(t, MP_TUNNELBRIDGE));
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76 SB(_me[t].m7, 5, 1, snow_or_desert);
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77 }
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78
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79 /**
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80 * Determines type of the wormhole and returns its other end
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81 * @param t one end
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82 * @pre IsTileType(t, MP_TUNNELBRIDGE)
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83 * @return other end
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84 */
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85 static inline TileIndex GetOtherTunnelBridgeEnd(TileIndex t)
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86 {
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87 assert(IsTileType(t, MP_TUNNELBRIDGE));
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88 return IsTunnel(t) ? GetOtherTunnelEnd(t) : GetOtherBridgeEnd(t);
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89 }
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90
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91
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92 /**
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93 * Get the reservation state of the rail tunnel/bridge
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94 * @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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95 * @param t the tile
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96 * @return reservation state
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97 */
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98 static inline bool HasTunnelBridgeReservation(TileIndex t)
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99 {
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100 assert(IsTileType(t, MP_TUNNELBRIDGE));
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101 assert(GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL);
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102 return HasBit(_m[t].m5, 4);
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103 }
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104
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105 /**
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106 * Set the reservation state of the rail tunnel/bridge
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107 * @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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108 * @param t the tile
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109 * @param b the reservation state
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110 */
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111 static inline void SetTunnelBridgeReservation(TileIndex t, bool b)
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112 {
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113 assert(IsTileType(t, MP_TUNNELBRIDGE));
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114 assert(GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL);
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115 SB(_m[t].m5, 4, 1, b ? 1 : 0);
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116 }
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117
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118 /**
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119 * Get the reserved track bits for a rail tunnel/bridge
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120 * @pre IsTileType(t, MP_TUNNELBRIDGE) && GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL
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121 * @param t the tile
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122 * @return reserved track bits
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123 */
12470
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124 static inline TrackBits GetTunnelBridgeReservationTrackBits(TileIndex t)
9784
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125 {
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126 return HasTunnelBridgeReservation(t) ? DiagDirToDiagTrackBits(GetTunnelBridgeDirection(t)) : TRACK_BIT_NONE;
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127 }
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128
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129 #endif /* TUNNELBRIDGE_MAP_H */