--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/yapf/yapf_road.cpp Tue Jan 02 19:19:48 2007 +0000
@@ -0,0 +1,451 @@
+/* $Id$ */
+
+#include "../stdafx.h"
+
+#include "yapf.hpp"
+#include "yapf_node_road.hpp"
+
+
+template <class Types>
+class CYapfCostRoadT
+{
+public:
+ typedef typename Types::Tpf Tpf; ///< pathfinder (derived from THIS class)
+ typedef typename Types::TrackFollower TrackFollower; ///< track follower helper
+ typedef typename Types::NodeList::Titem Node; ///< this will be our node type
+ typedef typename Node::Key Key; ///< key to hash tables
+
+protected:
+ /// to access inherited path finder
+ Tpf& Yapf() {return *static_cast<Tpf*>(this);}
+
+ int SlopeCost(TileIndex tile, TileIndex next_tile, Trackdir trackdir)
+ {
+ // height of the center of the current tile
+ int x1 = TileX(tile) * TILE_SIZE;
+ int y1 = TileY(tile) * TILE_SIZE;
+ int z1 = GetSlopeZ(x1 + TILE_SIZE / 2, y1 + TILE_SIZE / 2);
+
+ // height of the center of the next tile
+ int x2 = TileX(next_tile) * TILE_SIZE;
+ int y2 = TileY(next_tile) * TILE_SIZE;
+ int z2 = GetSlopeZ(x2 + TILE_SIZE / 2, y2 + TILE_SIZE / 2);
+
+ if (z2 - z1 > 1) {
+ /* Slope up */
+ return Yapf().PfGetSettings().road_slope_penalty;
+ }
+ return 0;
+ }
+
+ /** return one tile cost */
+ FORCEINLINE int OneTileCost(TileIndex tile, Trackdir trackdir)
+ {
+ int cost = 0;
+ // set base cost
+ if (IsDiagonalTrackdir(trackdir)) {
+ cost += YAPF_TILE_LENGTH;
+ switch (GetTileType(tile)) {
+ case MP_STREET:
+ /* Increase the cost for level crossings */
+ if (IsLevelCrossing(tile))
+ cost += Yapf().PfGetSettings().road_crossing_penalty;
+ break;
+
+ default:
+ break;
+ }
+ } else {
+ // non-diagonal trackdir
+ cost = YAPF_TILE_CORNER_LENGTH + Yapf().PfGetSettings().road_curve_penalty;
+ }
+ return cost;
+ }
+
+public:
+ /** Called by YAPF to calculate the cost from the origin to the given node.
+ * Calculates only the cost of given node, adds it to the parent node cost
+ * and stores the result into Node::m_cost member */
+ FORCEINLINE bool PfCalcCost(Node& n)
+ {
+ int segment_cost = 0;
+ // start at n.m_key.m_tile / n.m_key.m_td and walk to the end of segment
+ TileIndex tile = n.m_key.m_tile;
+ Trackdir trackdir = n.m_key.m_td;
+ while (true) {
+ // base tile cost depending on distance between edges
+ segment_cost += Yapf().OneTileCost(tile, trackdir);
+
+ // stop if we have just entered the depot
+ if (IsTileDepotType(tile, TRANSPORT_ROAD) && trackdir == DiagdirToDiagTrackdir(ReverseDiagDir(GetRoadDepotDirection(tile)))) {
+ // next time we will reverse and leave the depot
+ break;
+ }
+
+ // if there are no reachable trackdirs on new tile, we have end of road
+ TrackFollower F(Yapf().GetVehicle());
+ if (!F.Follow(tile, trackdir)) break;
+
+ // if there are more trackdirs available & reachable, we are at the end of segment
+ if (KillFirstBit2x64(F.m_new_td_bits) != 0) break;
+
+ Trackdir new_td = (Trackdir)FindFirstBit2x64(F.m_new_td_bits);
+
+ // stop if RV is on simple loop with no junctions
+ if (F.m_new_tile == n.m_key.m_tile && new_td == n.m_key.m_td) return false;
+
+ // if we skipped some tunnel tiles, add their cost
+ segment_cost += F.m_tiles_skipped * YAPF_TILE_LENGTH;
+
+ // add hilly terrain penalty
+ segment_cost += Yapf().SlopeCost(tile, F.m_new_tile, trackdir);
+
+ // add min/max speed penalties
+ int min_speed = 0;
+ int max_speed = F.GetSpeedLimit(&min_speed);
+ const Vehicle* v = Yapf().GetVehicle();
+ if (max_speed < v->max_speed) segment_cost += 1 * (v->max_speed - max_speed);
+ if (min_speed > v->max_speed) segment_cost += 10 * (min_speed - v->max_speed);
+
+ // move to the next tile
+ tile = F.m_new_tile;
+ trackdir = new_td;
+ };
+
+ // save end of segment back to the node
+ n.m_segment_last_tile = tile;
+ n.m_segment_last_td = trackdir;
+
+ // save also tile cost
+ int parent_cost = (n.m_parent != NULL) ? n.m_parent->m_cost : 0;
+ n.m_cost = parent_cost + segment_cost;
+ return true;
+ }
+};
+
+
+template <class Types>
+class CYapfDestinationAnyDepotRoadT
+{
+public:
+ typedef typename Types::Tpf Tpf; ///< the pathfinder class (derived from THIS class)
+ typedef typename Types::TrackFollower TrackFollower;
+ typedef typename Types::NodeList::Titem Node; ///< this will be our node type
+ typedef typename Node::Key Key; ///< key to hash tables
+
+ /// to access inherited path finder
+ Tpf& Yapf() {return *static_cast<Tpf*>(this);}
+
+ /// Called by YAPF to detect if node ends in the desired destination
+ FORCEINLINE bool PfDetectDestination(Node& n)
+ {
+ bool bDest = IsTileDepotType(n.m_segment_last_tile, TRANSPORT_ROAD);
+ return bDest;
+ }
+
+ /** Called by YAPF to calculate cost estimate. Calculates distance to the destination
+ * adds it to the actual cost from origin and stores the sum to the Node::m_estimate */
+ FORCEINLINE bool PfCalcEstimate(Node& n)
+ {
+ n.m_estimate = n.m_cost;
+ return true;
+ }
+};
+
+
+template <class Types>
+class CYapfDestinationTileRoadT
+{
+public:
+ typedef typename Types::Tpf Tpf; ///< the pathfinder class (derived from THIS class)
+ typedef typename Types::TrackFollower TrackFollower;
+ typedef typename Types::NodeList::Titem Node; ///< this will be our node type
+ typedef typename Node::Key Key; ///< key to hash tables
+
+protected:
+ TileIndex m_destTile;
+ TrackdirBits m_destTrackdirs;
+
+public:
+ void SetDestination(TileIndex tile, TrackdirBits trackdirs)
+ {
+ m_destTile = tile;
+ m_destTrackdirs = trackdirs;
+ }
+
+protected:
+ /// to access inherited path finder
+ Tpf& Yapf() {return *static_cast<Tpf*>(this);}
+
+public:
+ /// Called by YAPF to detect if node ends in the desired destination
+ FORCEINLINE bool PfDetectDestination(Node& n)
+ {
+ bool bDest = (n.m_segment_last_tile == m_destTile) && ((m_destTrackdirs & TrackdirToTrackdirBits(n.m_segment_last_td)) != TRACKDIR_BIT_NONE);
+ return bDest;
+ }
+
+ /** Called by YAPF to calculate cost estimate. Calculates distance to the destination
+ * adds it to the actual cost from origin and stores the sum to the Node::m_estimate */
+ inline bool PfCalcEstimate(Node& n)
+ {
+ static int dg_dir_to_x_offs[] = {-1, 0, 1, 0};
+ static int dg_dir_to_y_offs[] = {0, 1, 0, -1};
+ if (PfDetectDestination(n)) {
+ n.m_estimate = n.m_cost;
+ return true;
+ }
+
+ TileIndex tile = n.m_segment_last_tile;
+ DiagDirection exitdir = TrackdirToExitdir(n.m_segment_last_td);
+ int x1 = 2 * TileX(tile) + dg_dir_to_x_offs[(int)exitdir];
+ int y1 = 2 * TileY(tile) + dg_dir_to_y_offs[(int)exitdir];
+ int x2 = 2 * TileX(m_destTile);
+ int y2 = 2 * TileY(m_destTile);
+ int dx = abs(x1 - x2);
+ int dy = abs(y1 - y2);
+ int dmin = min(dx, dy);
+ int dxy = abs(dx - dy);
+ int d = dmin * YAPF_TILE_CORNER_LENGTH + (dxy - 1) * (YAPF_TILE_LENGTH / 2);
+ n.m_estimate = n.m_cost + d;
+ assert(n.m_estimate >= n.m_parent->m_estimate);
+ return true;
+ }
+};
+
+
+
+template <class Types>
+class CYapfFollowRoadT
+{
+public:
+ typedef typename Types::Tpf Tpf; ///< the pathfinder class (derived from THIS class)
+ typedef typename Types::TrackFollower TrackFollower;
+ typedef typename Types::NodeList::Titem Node; ///< this will be our node type
+ typedef typename Node::Key Key; ///< key to hash tables
+
+protected:
+ /// to access inherited path finder
+ FORCEINLINE Tpf& Yapf() {return *static_cast<Tpf*>(this);}
+
+public:
+
+ /** Called by YAPF to move from the given node to the next tile. For each
+ * reachable trackdir on the new tile creates new node, initializes it
+ * and adds it to the open list by calling Yapf().AddNewNode(n) */
+ inline void PfFollowNode(Node& old_node)
+ {
+ TrackFollower F(Yapf().GetVehicle());
+ if (F.Follow(old_node.m_segment_last_tile, old_node.m_segment_last_td))
+ Yapf().AddMultipleNodes(&old_node, F.m_new_tile, F.m_new_td_bits);
+ }
+
+ /// return debug report character to identify the transportation type
+ FORCEINLINE char TransportTypeChar() const {return 'r';}
+
+ static Trackdir stChooseRoadTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir)
+ {
+ Tpf pf;
+ return pf.ChooseRoadTrack(v, tile, enterdir);
+ }
+
+ FORCEINLINE Trackdir ChooseRoadTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir)
+ {
+ // handle special case - when next tile is destination tile
+ if (tile == v->dest_tile) {
+ // choose diagonal trackdir reachable from enterdir
+ return (Trackdir)DiagdirToDiagTrackdir(enterdir);
+ }
+ // our source tile will be the next vehicle tile (should be the given one)
+ TileIndex src_tile = tile;
+ // get available trackdirs on the start tile
+ uint ts = GetTileTrackStatus(tile, TRANSPORT_ROAD);
+ TrackdirBits src_trackdirs = (TrackdirBits)(ts & TRACKDIR_BIT_MASK);
+ // select reachable trackdirs only
+ src_trackdirs &= DiagdirReachesTrackdirs(enterdir);
+
+ // get available trackdirs on the destination tile
+ TileIndex dest_tile = v->dest_tile;
+ uint dest_ts = GetTileTrackStatus(dest_tile, TRANSPORT_ROAD);
+ TrackdirBits dest_trackdirs = (TrackdirBits)(dest_ts & TRACKDIR_BIT_MASK);
+
+ // set origin and destination nodes
+ Yapf().SetOrigin(src_tile, src_trackdirs);
+ Yapf().SetDestination(dest_tile, dest_trackdirs);
+
+ // find the best path
+ Yapf().FindPath(v);
+
+ // if path not found - return INVALID_TRACKDIR
+ Trackdir next_trackdir = INVALID_TRACKDIR;
+ Node* pNode = &Yapf().GetBestNode();
+ if (pNode != NULL) {
+ // path was found or at least suggested
+ // walk through the path back to its origin
+ while (pNode->m_parent != NULL) {
+ pNode = pNode->m_parent;
+ }
+ // return trackdir from the best origin node (one of start nodes)
+ Node& best_next_node = *pNode;
+ assert(best_next_node.GetTile() == tile);
+ next_trackdir = best_next_node.GetTrackdir();
+ }
+ return next_trackdir;
+ }
+
+ static uint stDistanceToTile(const Vehicle *v, TileIndex tile)
+ {
+ Tpf pf;
+ return pf.DistanceToTile(v, tile);
+ }
+
+ FORCEINLINE uint DistanceToTile(const Vehicle *v, TileIndex dst_tile)
+ {
+ // handle special case - when current tile is the destination tile
+ if (dst_tile == v->tile) {
+ // distance is zero in this case
+ return 0;
+ }
+
+ if (!SetOriginFromVehiclePos(v)) return UINT_MAX;
+
+ // set destination tile, trackdir
+ // get available trackdirs on the destination tile
+ uint dest_ts = GetTileTrackStatus(dst_tile, TRANSPORT_ROAD);
+ TrackdirBits dst_td_bits = (TrackdirBits)(dest_ts & TRACKDIR_BIT_MASK);
+ Yapf().SetDestination(dst_tile, dst_td_bits);
+
+ // find the best path
+ Yapf().FindPath(v);
+
+ // if path not found - return distance = UINT_MAX
+ uint dist = UINT_MAX;
+ Node* pNode = &Yapf().GetBestNode();
+ if (pNode != NULL) {
+ // path was found or at least suggested
+ // get the path cost estimate
+ dist = pNode->GetCostEstimate();
+ }
+
+ return dist;
+ }
+
+ /** Return true if the valid origin (tile/trackdir) was set from the current vehicle position. */
+ FORCEINLINE bool SetOriginFromVehiclePos(const Vehicle *v)
+ {
+ // set origin (tile, trackdir)
+ TileIndex src_tile = v->tile;
+ Trackdir src_td = GetVehicleTrackdir(v);
+ if ((GetTileTrackStatus(src_tile, TRANSPORT_ROAD) & TrackdirToTrackdirBits(src_td)) == 0) {
+ // sometimes the roadveh is not on the road (it resides on non-existing track)
+ // how should we handle that situation?
+ return false;
+ }
+ Yapf().SetOrigin(src_tile, TrackdirToTrackdirBits(src_td));
+ return true;
+ }
+
+ static Depot* stFindNearestDepot(const Vehicle* v, TileIndex tile, Trackdir td)
+ {
+ Tpf pf;
+ return pf.FindNearestDepot(v, tile, td);
+ }
+
+ FORCEINLINE Depot* FindNearestDepot(const Vehicle* v, TileIndex tile, Trackdir td)
+ {
+ // set origin and destination nodes
+ Yapf().SetOrigin(tile, TrackdirToTrackdirBits(td));
+
+ // find the best path
+ bool bFound = Yapf().FindPath(v);
+ if (!bFound) return false;
+
+ // some path found
+ // get found depot tile
+ Node& n = Yapf().GetBestNode();
+ TileIndex depot_tile = n.m_segment_last_tile;
+ assert(IsTileDepotType(depot_tile, TRANSPORT_ROAD));
+ Depot* ret = GetDepotByTile(depot_tile);
+ return ret;
+ }
+};
+
+template <class Tpf_, class Tnode_list, template <class Types> class Tdestination>
+struct CYapfRoad_TypesT
+{
+ typedef CYapfRoad_TypesT<Tpf_, Tnode_list, Tdestination> Types;
+
+ typedef Tpf_ Tpf;
+ typedef CFollowTrackRoad TrackFollower;
+ typedef Tnode_list NodeList;
+ typedef CYapfBaseT<Types> PfBase;
+ typedef CYapfFollowRoadT<Types> PfFollow;
+ typedef CYapfOriginTileT<Types> PfOrigin;
+ typedef Tdestination<Types> PfDestination;
+ typedef CYapfSegmentCostCacheNoneT<Types> PfCache;
+ typedef CYapfCostRoadT<Types> PfCost;
+};
+
+struct CYapfRoad1 : CYapfT<CYapfRoad_TypesT<CYapfRoad1 , CRoadNodeListTrackDir, CYapfDestinationTileRoadT > > {};
+struct CYapfRoad2 : CYapfT<CYapfRoad_TypesT<CYapfRoad2 , CRoadNodeListExitDir , CYapfDestinationTileRoadT > > {};
+
+struct CYapfRoadAnyDepot1 : CYapfT<CYapfRoad_TypesT<CYapfRoadAnyDepot1, CRoadNodeListTrackDir, CYapfDestinationAnyDepotRoadT> > {};
+struct CYapfRoadAnyDepot2 : CYapfT<CYapfRoad_TypesT<CYapfRoadAnyDepot2, CRoadNodeListExitDir , CYapfDestinationAnyDepotRoadT> > {};
+
+
+Trackdir YapfChooseRoadTrack(Vehicle *v, TileIndex tile, DiagDirection enterdir)
+{
+ // default is YAPF type 2
+ typedef Trackdir (*PfnChooseRoadTrack)(Vehicle*, TileIndex, DiagDirection);
+ PfnChooseRoadTrack pfnChooseRoadTrack = &CYapfRoad2::stChooseRoadTrack; // default: ExitDir, allow 90-deg
+
+ // check if non-default YAPF type should be used
+ if (_patches.yapf.disable_node_optimization)
+ pfnChooseRoadTrack = &CYapfRoad1::stChooseRoadTrack; // Trackdir, allow 90-deg
+
+ Trackdir td_ret = pfnChooseRoadTrack(v, tile, enterdir);
+ return td_ret;
+}
+
+uint YapfRoadVehDistanceToTile(const Vehicle* v, TileIndex tile)
+{
+ // default is YAPF type 2
+ typedef uint (*PfnDistanceToTile)(const Vehicle*, TileIndex);
+ PfnDistanceToTile pfnDistanceToTile = &CYapfRoad2::stDistanceToTile; // default: ExitDir, allow 90-deg
+
+ // check if non-default YAPF type should be used
+ if (_patches.yapf.disable_node_optimization)
+ pfnDistanceToTile = &CYapfRoad1::stDistanceToTile; // Trackdir, allow 90-deg
+
+ // measure distance in YAPF units
+ uint dist = pfnDistanceToTile(v, tile);
+ // convert distance to tiles
+ if (dist != UINT_MAX)
+ dist = (dist + YAPF_TILE_LENGTH - 1) / YAPF_TILE_LENGTH;
+ return dist;
+}
+
+Depot* YapfFindNearestRoadDepot(const Vehicle *v)
+{
+ TileIndex tile = v->tile;
+ Trackdir trackdir = GetVehicleTrackdir(v);
+ if ((GetTileTrackStatus(tile, TRANSPORT_ROAD) & TrackdirToTrackdirBits(trackdir)) == 0)
+ return NULL;
+
+ // handle the case when our vehicle is already in the depot tile
+ if (IsTileType(tile, MP_STREET) && IsTileDepotType(tile, TRANSPORT_ROAD)) {
+ // only what we need to return is the Depot*
+ return GetDepotByTile(tile);
+ }
+
+ // default is YAPF type 2
+ typedef Depot* (*PfnFindNearestDepot)(const Vehicle*, TileIndex, Trackdir);
+ PfnFindNearestDepot pfnFindNearestDepot = &CYapfRoadAnyDepot2::stFindNearestDepot;
+
+ // check if non-default YAPF type should be used
+ if (_patches.yapf.disable_node_optimization)
+ pfnFindNearestDepot = &CYapfRoadAnyDepot1::stFindNearestDepot; // Trackdir, allow 90-deg
+
+ Depot* ret = pfnFindNearestDepot(v, tile, trackdir);
+ return ret;
+}