/* Calcs the heuristic to the target station or tile. For train stations, it
* takes into account the direction of approach.
*/
static int32 NPFCalcStationOrTileHeuristic(AyStar *as, AyStarNode *current, OpenListNode *parent)
{
NPFFindStationOrTileData *fstd = (NPFFindStationOrTileData*)as->user_target;
NPFFoundTargetData *ftd = (NPFFoundTargetData*)as->user_path;
TileIndex from = current->tile;
TileIndex to = fstd->dest_coords;
uint dist;
/* for train-stations, we are going to aim for the closest station tile */
if (as->user_data[NPF_TYPE] != TRANSPORT_WATER && fstd->station_index != INVALID_STATION)
to = CalcClosestStationTile(fstd->station_index, from, fstd->station_type);
if (as->user_data[NPF_TYPE] == TRANSPORT_ROAD) {
/* Since roads only have diagonal pieces, we use manhattan distance here */
dist = DistanceManhattan(from, to) * NPF_TILE_LENGTH;
} else {
/* Ships and trains can also go diagonal, so the minimum distance is shorter */
dist = NPFDistanceTrack(from, to);
}
DEBUG(npf, 4, "Calculating H for: (%d, %d). Result: %d", TileX(current->tile), TileY(current->tile), dist);
if (dist < ftd->best_bird_dist) {
ftd->best_bird_dist = dist;
ftd->best_trackdir = (Trackdir)current->user_data[NPF_TRACKDIR_CHOICE];
}
return dist;
}
void SetDestination(const Train *v)
{
switch (v->current_order.GetType()) {
case OT_GOTO_WAYPOINT:
if (!Waypoint::Get(v->current_order.GetDestination())->IsSingleTile()) {
/* In case of 'complex' waypoints we need to do a look
* ahead. This look ahead messes a bit about, which
* means that it 'corrupts' the cache. To prevent this
* we disable caching when we're looking for a complex
* waypoint. */
Yapf().DisableCache(true);
}
/* FALL THROUGH */
case OT_GOTO_STATION:
m_destTile = CalcClosestStationTile(v->current_order.GetDestination(), v->tile, v->current_order.IsType(OT_GOTO_STATION) ? STATION_RAIL : STATION_WAYPOINT);
m_dest_station_id = v->current_order.GetDestination();
m_destTrackdirs = INVALID_TRACKDIR_BIT;
break;
default:
m_destTile = v->dest_tile;
m_dest_station_id = INVALID_STATION;
m_destTrackdirs = TrackStatusToTrackdirBits(GetTileTrackStatus(v->dest_tile, TRANSPORT_RAIL, 0));
break;
}
CYapfDestinationRailBase::SetDestination(v);
}
void SetDestination(const RoadVehicle *v)
{
if (v->current_order.IsType(OT_GOTO_STATION)) {
m_dest_station = v->current_order.GetDestination();
m_bus = v->IsBus();
m_destTile = CalcClosestStationTile(m_dest_station, v->tile, m_bus ? STATION_BUS : STATION_TRUCK);
m_non_artic = !v->HasArticulatedPart();
m_destTrackdirs = INVALID_TRACKDIR_BIT;
} else {
m_dest_station = INVALID_STATION;
m_destTile = v->dest_tile;
m_destTrackdirs = TrackStatusToTrackdirBits(GetTileTrackStatus(v->dest_tile, TRANSPORT_ROAD, v->compatible_roadtypes));
}
}
