author | KUDr |
Sun, 24 Jun 2007 13:18:54 +0000 | |
changeset 7037 | 64249224bb74 |
parent 6121 | 2aae24b0881f |
child 7084 | 3a9673715c50 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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/** @file yapf_node_rail.hpp */ |
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#ifndef YAPF_NODE_RAIL_HPP |
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#define YAPF_NODE_RAIL_HPP |
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/** key for cached segment cost for rail YAPF */ |
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struct CYapfRailSegmentKey |
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{ |
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uint32 m_value; |
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FORCEINLINE CYapfRailSegmentKey(const CYapfRailSegmentKey& src) : m_value(src.m_value) {} |
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FORCEINLINE CYapfRailSegmentKey(const CYapfNodeKeyExitDir& node_key) {Set(node_key);} |
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FORCEINLINE void Set(const CYapfRailSegmentKey& src) {m_value = src.m_value;} |
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FORCEINLINE void Set(const CYapfNodeKeyExitDir& node_key) {m_value = (((int)node_key.m_tile) << 2) | node_key.m_exitdir;} |
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FORCEINLINE int32 CalcHash() const {return m_value;} |
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FORCEINLINE TileIndex GetTile() const {return (TileIndex)(m_value >> 2);} |
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FORCEINLINE DiagDirection GetExitDir() const {return (DiagDirection)(m_value & 3);} |
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FORCEINLINE bool operator == (const CYapfRailSegmentKey& other) const {return m_value == other.m_value;} |
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}; |
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/* Enum used in PfCalcCost() to see why was the segment closed. */ |
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enum EndSegmentReason { |
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/* The following reasons can be saved into cached segment */ |
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ESR_DEAD_END = 0, ///< track ends here |
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ESR_RAIL_TYPE, ///< the next tile has a different rail type than our tiles |
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ESR_INFINITE_LOOP, ///< infinite loop detected |
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ESR_SEGMENT_TOO_LONG, ///< the segment is too long (possible infinite loop) |
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ESR_CHOICE_FOLLOWS, ///< the next tile contains a choice (the track splits to more than one segments) |
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ESR_DEPOT, ///< stop in the depot (could be a target next time) |
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ESR_WAYPOINT, ///< waypoint encountered (could be a target next time) |
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ESR_STATION, ///< station encountered (could be a target next time) |
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/* The following reasons are used only internally by PfCalcCost(). |
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* They should not be found in the cached segment. */ |
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ESR_PATH_TOO_LONG, ///< the path is too long (searching for the nearest depot in the given radius) |
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ESR_FIRST_TWO_WAY_RED, ///< first signal was 2-way and it was red |
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ESR_LOOK_AHEAD_END, ///< we have just passed the last look-ahead signal |
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ESR_TARGET_REACHED, ///< we have just reached the destination |
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/* Special values */ |
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ESR_NONE = 0xFF, ///< no reason to end the segment here |
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}; |
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enum EndSegmentReasonBits { |
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ESRB_NONE = 0, |
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ESRB_DEAD_END = 1 << ESR_DEAD_END, |
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ESRB_RAIL_TYPE = 1 << ESR_RAIL_TYPE, |
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ESRB_INFINITE_LOOP = 1 << ESR_INFINITE_LOOP, |
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ESRB_SEGMENT_TOO_LONG = 1 << ESR_SEGMENT_TOO_LONG, |
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ESRB_CHOICE_FOLLOWS = 1 << ESR_CHOICE_FOLLOWS, |
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ESRB_DEPOT = 1 << ESR_DEPOT, |
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ESRB_WAYPOINT = 1 << ESR_WAYPOINT, |
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ESRB_STATION = 1 << ESR_STATION, |
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ESRB_PATH_TOO_LONG = 1 << ESR_PATH_TOO_LONG, |
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ESRB_FIRST_TWO_WAY_RED = 1 << ESR_FIRST_TWO_WAY_RED, |
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ESRB_LOOK_AHEAD_END = 1 << ESR_LOOK_AHEAD_END, |
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ESRB_TARGET_REACHED = 1 << ESR_TARGET_REACHED, |
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/* Additional (composite) values. */ |
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/* What reasons mean that the target can be fond and needs to be detected. */ |
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ESRB_POSSIBLE_TARGET = ESRB_DEPOT | ESRB_WAYPOINT | ESRB_STATION, |
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/* What reasons can be stored back into cached segment. */ |
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ESRB_CACHED_MASK = ESRB_DEAD_END | ESRB_RAIL_TYPE | ESRB_INFINITE_LOOP | ESRB_SEGMENT_TOO_LONG | ESRB_CHOICE_FOLLOWS | ESRB_DEPOT | ESRB_WAYPOINT | ESRB_STATION, |
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/* Reasons to abort pathfinding in this direction. */ |
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ESRB_ABORT_PF_MASK = ESRB_DEAD_END | ESRB_PATH_TOO_LONG | ESRB_INFINITE_LOOP | ESRB_FIRST_TWO_WAY_RED, |
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}; |
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DECLARE_ENUM_AS_BIT_SET(EndSegmentReasonBits); |
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/** cached segment cost for rail YAPF */ |
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struct CYapfRailSegment |
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{ |
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typedef CYapfRailSegmentKey Key; |
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CYapfRailSegmentKey m_key; |
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TileIndex m_last_tile; |
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Trackdir m_last_td; |
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int m_cost; |
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TileIndex m_last_signal_tile; |
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Trackdir m_last_signal_td; |
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EndSegmentReasonBits m_end_segment_reason; |
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CYapfRailSegment* m_hash_next; |
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FORCEINLINE CYapfRailSegment(const CYapfRailSegmentKey& key) |
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: m_key(key) |
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, m_last_tile(INVALID_TILE) |
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, m_last_td(INVALID_TRACKDIR) |
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, m_cost(-1) |
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, m_last_signal_tile(INVALID_TILE) |
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, m_last_signal_td(INVALID_TRACKDIR) |
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, m_end_segment_reason(ESRB_NONE) |
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101 |
, m_hash_next(NULL) |
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102 |
{} |
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103 |
|
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104 |
FORCEINLINE const Key& GetKey() const {return m_key;} |
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105 |
FORCEINLINE TileIndex GetTile() const {return m_key.GetTile();} |
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106 |
FORCEINLINE DiagDirection GetExitDir() const {return m_key.GetExitDir();} |
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107 |
FORCEINLINE CYapfRailSegment* GetHashNext() {return m_hash_next;} |
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108 |
FORCEINLINE void SetHashNext(CYapfRailSegment* next) {m_hash_next = next;} |
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109 |
}; |
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110 |
|
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111 |
/** Yapf Node for rail YAPF */ |
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112 |
template <class Tkey_> |
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113 |
struct CYapfRailNodeT |
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114 |
: CYapfNodeT<Tkey_, CYapfRailNodeT<Tkey_> > |
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115 |
{ |
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116 |
typedef CYapfNodeT<Tkey_, CYapfRailNodeT<Tkey_> > base; |
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117 |
typedef CYapfRailSegment CachedData; |
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118 |
|
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119 |
CYapfRailSegment *m_segment; |
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120 |
uint16 m_num_signals_passed; |
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121 |
union { |
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uint32 m_inherited_flags; |
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123 |
struct { |
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bool m_targed_seen : 1; |
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bool m_choice_seen : 1; |
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126 |
bool m_last_signal_was_red : 1; |
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127 |
} flags_s; |
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128 |
} flags_u; |
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129 |
SignalType m_last_red_signal_type; |
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130 |
|
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131 |
FORCEINLINE void Set(CYapfRailNodeT* parent, TileIndex tile, Trackdir td, bool is_choice) |
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132 |
{ |
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133 |
base::Set(parent, tile, td, is_choice); |
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134 |
m_segment = NULL; |
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135 |
if (parent == NULL) { |
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136 |
m_num_signals_passed = 0; |
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137 |
flags_u.m_inherited_flags = 0; |
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138 |
m_last_red_signal_type = SIGTYPE_NORMAL; |
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139 |
} else { |
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140 |
m_num_signals_passed = parent->m_num_signals_passed; |
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141 |
flags_u.m_inherited_flags = parent->flags_u.m_inherited_flags; |
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m_last_red_signal_type = parent->m_last_red_signal_type; |
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143 |
} |
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flags_u.flags_s.m_choice_seen |= is_choice; |
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145 |
} |
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146 |
|
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147 |
FORCEINLINE TileIndex GetLastTile() const {assert(m_segment != NULL); return m_segment->m_last_tile;} |
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148 |
FORCEINLINE Trackdir GetLastTrackdir() const {assert(m_segment != NULL); return m_segment->m_last_td;} |
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149 |
FORCEINLINE void SetLastTileTrackdir(TileIndex tile, Trackdir td) {assert(m_segment != NULL); m_segment->m_last_tile = tile; m_segment->m_last_td = td;} |
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150 |
}; |
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151 |
|
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// now define two major node types (that differ by key type) |
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153 |
typedef CYapfRailNodeT<CYapfNodeKeyExitDir> CYapfRailNodeExitDir; |
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154 |
typedef CYapfRailNodeT<CYapfNodeKeyTrackDir> CYapfRailNodeTrackDir; |
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155 |
|
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156 |
// Default NodeList types |
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typedef CNodeList_HashTableT<CYapfRailNodeExitDir , 10, 12> CRailNodeListExitDir; |
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158 |
typedef CNodeList_HashTableT<CYapfRailNodeTrackDir, 12, 16> CRailNodeListTrackDir; |
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159 |
|
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160 |
|
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161 |
|
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162 |
#endif /* YAPF_NODE_RAIL_HPP */ |