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00012 #include "../../stdafx.h"
00013 #include "../../ship.h"
00014
00015 #include "yapf.hpp"
00016 #include "yapf_node_ship.hpp"
00017
00019 template <class Types>
00020 class CYapfFollowShipT
00021 {
00022 public:
00023 typedef typename Types::Tpf Tpf;
00024 typedef typename Types::TrackFollower TrackFollower;
00025 typedef typename Types::NodeList::Titem Node;
00026 typedef typename Node::Key Key;
00027
00028 protected:
00030 inline Tpf& Yapf()
00031 {
00032 return *static_cast<Tpf*>(this);
00033 }
00034
00035 public:
00041 inline void PfFollowNode(Node& old_node)
00042 {
00043 TrackFollower F(Yapf().GetVehicle());
00044 if (F.Follow(old_node.m_key.m_tile, old_node.m_key.m_td)) {
00045 Yapf().AddMultipleNodes(&old_node, F);
00046 }
00047 }
00048
00050 inline char TransportTypeChar() const
00051 {
00052 return 'w';
00053 }
00054
00055 static Trackdir ChooseShipTrack(const Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found)
00056 {
00057
00058 if (tile == v->dest_tile) {
00059
00060 TrackdirBits trackdirs = (TrackdirBits)(tracks | ((int)tracks << 8));
00061
00062 trackdirs &= DiagdirReachesTrackdirs(enterdir);
00063 return (Trackdir)FindFirstBit2x64(trackdirs);
00064 }
00065
00066
00067 TileIndex src_tile = TILE_ADD(tile, TileOffsByDiagDir(ReverseDiagDir(enterdir)));
00068 Trackdir trackdir = v->GetVehicleTrackdir();
00069 assert(IsValidTrackdir(trackdir));
00070
00071
00072 TrackdirBits trackdirs = TrackdirToTrackdirBits(trackdir);
00073
00074 TrackdirBits dest_trackdirs = TrackStatusToTrackdirBits(GetTileTrackStatus(v->dest_tile, TRANSPORT_WATER, 0));
00075
00076
00077 Tpf pf;
00078
00079 pf.SetOrigin(src_tile, trackdirs);
00080 pf.SetDestination(v->dest_tile, dest_trackdirs);
00081
00082 path_found = pf.FindPath(v);
00083
00084 Trackdir next_trackdir = INVALID_TRACKDIR;
00085
00086 Node *pNode = pf.GetBestNode();
00087 if (pNode != NULL) {
00088
00089 Node *pPrevNode = NULL;
00090 while (pNode->m_parent != NULL) {
00091 pPrevNode = pNode;
00092 pNode = pNode->m_parent;
00093 }
00094
00095 Node& best_next_node = *pPrevNode;
00096 assert(best_next_node.GetTile() == tile);
00097 next_trackdir = best_next_node.GetTrackdir();
00098 }
00099 return next_trackdir;
00100 }
00101
00111 static bool CheckShipReverse(const Ship *v, TileIndex tile, Trackdir td1, Trackdir td2)
00112 {
00113
00114 TrackdirBits dest_trackdirs = TrackStatusToTrackdirBits(GetTileTrackStatus(v->dest_tile, TRANSPORT_WATER, 0));
00115
00116
00117 Tpf pf;
00118
00119 pf.SetOrigin(tile, TrackdirToTrackdirBits(td1) | TrackdirToTrackdirBits(td2));
00120 pf.SetDestination(v->dest_tile, dest_trackdirs);
00121
00122 if (!pf.FindPath(v)) return false;
00123
00124 Node *pNode = pf.GetBestNode();
00125 if (pNode == NULL) return false;
00126
00127
00128
00129 while (pNode->m_parent != NULL) {
00130 pNode = pNode->m_parent;
00131 }
00132
00133 Trackdir best_trackdir = pNode->GetTrackdir();
00134 assert(best_trackdir == td1 || best_trackdir == td2);
00135 return best_trackdir == td2;
00136 }
00137 };
00138
00140 template <class Types>
00141 class CYapfCostShipT
00142 {
00143 public:
00144 typedef typename Types::Tpf Tpf;
00145 typedef typename Types::TrackFollower TrackFollower;
00146 typedef typename Types::NodeList::Titem Node;
00147 typedef typename Node::Key Key;
00148
00149 protected:
00151 Tpf& Yapf()
00152 {
00153 return *static_cast<Tpf*>(this);
00154 }
00155
00156 public:
00162 inline bool PfCalcCost(Node& n, const TrackFollower *tf)
00163 {
00164
00165 int c = IsDiagonalTrackdir(n.GetTrackdir()) ? YAPF_TILE_LENGTH : YAPF_TILE_CORNER_LENGTH;
00166
00167 if (n.m_parent != NULL && n.GetTrackdir() != NextTrackdir(n.m_parent->GetTrackdir())) {
00168
00169 c += YAPF_TILE_LENGTH;
00170 }
00171
00172
00173 c += YAPF_TILE_LENGTH * tf->m_tiles_skipped;
00174
00175
00176 const ShipVehicleInfo *svi = ShipVehInfo(Yapf().GetVehicle()->engine_type);
00177 byte speed_frac = (GetEffectiveWaterClass(n.GetTile()) == WATER_CLASS_SEA) ? svi->ocean_speed_frac : svi->canal_speed_frac;
00178 if (speed_frac > 0) c += YAPF_TILE_LENGTH * (1 + tf->m_tiles_skipped) * speed_frac / (256 - speed_frac);
00179
00180
00181 n.m_cost = n.m_parent->m_cost + c;
00182 return true;
00183 }
00184 };
00185
00190 template <class Tpf_, class Ttrack_follower, class Tnode_list>
00191 struct CYapfShip_TypesT
00192 {
00194 typedef CYapfShip_TypesT<Tpf_, Ttrack_follower, Tnode_list> Types;
00195
00197 typedef Tpf_ Tpf;
00199 typedef Ttrack_follower TrackFollower;
00201 typedef Tnode_list NodeList;
00202 typedef Ship VehicleType;
00204 typedef CYapfBaseT<Types> PfBase;
00205 typedef CYapfFollowShipT<Types> PfFollow;
00206 typedef CYapfOriginTileT<Types> PfOrigin;
00207 typedef CYapfDestinationTileT<Types> PfDestination;
00208 typedef CYapfSegmentCostCacheNoneT<Types> PfCache;
00209 typedef CYapfCostShipT<Types> PfCost;
00210 };
00211
00212
00213 struct CYapfShip1 : CYapfT<CYapfShip_TypesT<CYapfShip1, CFollowTrackWater , CShipNodeListTrackDir> > {};
00214
00215 struct CYapfShip2 : CYapfT<CYapfShip_TypesT<CYapfShip2, CFollowTrackWater , CShipNodeListExitDir > > {};
00216
00217 struct CYapfShip3 : CYapfT<CYapfShip_TypesT<CYapfShip3, CFollowTrackWaterNo90, CShipNodeListTrackDir> > {};
00218
00220 Track YapfShipChooseTrack(const Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found)
00221 {
00222
00223 typedef Trackdir (*PfnChooseShipTrack)(const Ship*, TileIndex, DiagDirection, TrackBits, bool &path_found);
00224 PfnChooseShipTrack pfnChooseShipTrack = CYapfShip2::ChooseShipTrack;
00225
00226
00227 if (_settings_game.pf.forbid_90_deg) {
00228 pfnChooseShipTrack = &CYapfShip3::ChooseShipTrack;
00229 } else if (_settings_game.pf.yapf.disable_node_optimization) {
00230 pfnChooseShipTrack = &CYapfShip1::ChooseShipTrack;
00231 }
00232
00233 Trackdir td_ret = pfnChooseShipTrack(v, tile, enterdir, tracks, path_found);
00234 return (td_ret != INVALID_TRACKDIR) ? TrackdirToTrack(td_ret) : INVALID_TRACK;
00235 }
00236
00237 bool YapfShipCheckReverse(const Ship *v)
00238 {
00239 Trackdir td = v->GetVehicleTrackdir();
00240 Trackdir td_rev = ReverseTrackdir(td);
00241 TileIndex tile = v->tile;
00242
00243 typedef bool (*PfnCheckReverseShip)(const Ship*, TileIndex, Trackdir, Trackdir);
00244 PfnCheckReverseShip pfnCheckReverseShip = CYapfShip2::CheckShipReverse;
00245
00246
00247 if (_settings_game.pf.forbid_90_deg) {
00248 pfnCheckReverseShip = &CYapfShip3::CheckShipReverse;
00249 } else if (_settings_game.pf.yapf.disable_node_optimization) {
00250 pfnCheckReverseShip = &CYapfShip1::CheckShipReverse;
00251 }
00252
00253 bool reverse = pfnCheckReverseShip(v, tile, td, td_rev);
00254
00255 return reverse;
00256 }