mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-09 19:10:38 +00:00
382 lines
12 KiB
C++
382 lines
12 KiB
C++
/* $Id$ */
|
|
|
|
#ifndef YAPF_COSTRAIL_HPP
|
|
#define YAPF_COSTRAIL_HPP
|
|
|
|
|
|
template <class Types>
|
|
class CYapfCostRailT
|
|
: public CYapfCostBase
|
|
, public CostRailSettings
|
|
{
|
|
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
|
|
typedef typename Node::CachedData CachedData;
|
|
|
|
protected:
|
|
int m_max_cost;
|
|
CBlobT<int> m_sig_look_ahead_costs;
|
|
public:
|
|
bool m_stopped_on_first_two_way_signal;
|
|
protected:
|
|
|
|
static const int s_max_segment_cost = 10000;
|
|
|
|
CYapfCostRailT()
|
|
: m_max_cost(0)
|
|
, m_stopped_on_first_two_way_signal(false)
|
|
{
|
|
// pre-compute look-ahead penalties into array
|
|
int p0 = Yapf().PfGetSettings().rail_look_ahead_signal_p0;
|
|
int p1 = Yapf().PfGetSettings().rail_look_ahead_signal_p1;
|
|
int p2 = Yapf().PfGetSettings().rail_look_ahead_signal_p2;
|
|
int *pen = m_sig_look_ahead_costs.GrowSizeNC(Yapf().PfGetSettings().rail_look_ahead_max_signals);
|
|
for (uint i = 0; i < Yapf().PfGetSettings().rail_look_ahead_max_signals; i++)
|
|
pen[i] = p0 + i * (p1 + i * p2);
|
|
}
|
|
|
|
/// to access inherited path finder
|
|
Tpf& Yapf() {return *static_cast<Tpf*>(this);}
|
|
|
|
public:
|
|
FORCEINLINE int SlopeCost(TileIndex tile, Trackdir td)
|
|
{
|
|
CPerfStart perf_cost(Yapf().m_perf_slope_cost);
|
|
if (!stSlopeCost(tile, td)) return 0;
|
|
return Yapf().PfGetSettings().rail_slope_penalty;
|
|
}
|
|
|
|
FORCEINLINE int CurveCost(Trackdir td1, Trackdir td2)
|
|
{
|
|
int cost = 0;
|
|
if (TrackFollower::Allow90degTurns()
|
|
&& ((TrackdirToTrackdirBits(td2) & (TrackdirBits)TrackdirCrossesTrackdirs(td1)) != 0)) {
|
|
// 90-deg curve penalty
|
|
cost += Yapf().PfGetSettings().rail_curve90_penalty;
|
|
} else if (td2 != NextTrackdir(td1)) {
|
|
// 45-deg curve penalty
|
|
cost += Yapf().PfGetSettings().rail_curve45_penalty;
|
|
}
|
|
return cost;
|
|
}
|
|
|
|
/** return one tile cost. If tile is a tunnel entry, it is moved to the end of tunnel */
|
|
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().rail_crossing_penalty;
|
|
break;
|
|
|
|
case MP_STATION:
|
|
// penalty for passing station tiles
|
|
cost += Yapf().PfGetSettings().rail_station_penalty;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
// non-diagonal trackdir
|
|
cost = YAPF_TILE_CORNER_LENGTH;
|
|
}
|
|
return cost;
|
|
}
|
|
|
|
int SignalCost(Node& n, TileIndex tile, Trackdir trackdir)
|
|
{
|
|
int cost = 0;
|
|
// if there is one-way signal in the opposite direction, then it is not our way
|
|
CPerfStart perf_cost(Yapf().m_perf_other_cost);
|
|
if (IsTileType(tile, MP_RAILWAY)) {
|
|
bool has_signal_against = HasSignalOnTrackdir(tile, ReverseTrackdir(trackdir));
|
|
bool has_signal_along = HasSignalOnTrackdir(tile, trackdir);
|
|
if (has_signal_against && !has_signal_along) {
|
|
// one-way signal in opposite direction
|
|
n.m_segment->flags_u.flags_s.m_end_of_line = true;
|
|
} else if (has_signal_along) {
|
|
SignalState sig_state = GetSignalStateByTrackdir(tile, trackdir);
|
|
// cache the look-ahead polynomial constant only if we didn't pass more signals than the look-ahead limit is
|
|
int look_ahead_cost = (n.m_num_signals_passed < m_sig_look_ahead_costs.Size()) ? m_sig_look_ahead_costs.Data()[n.m_num_signals_passed] : 0;
|
|
if (sig_state != SIGNAL_STATE_RED) {
|
|
// green signal
|
|
n.flags_u.flags_s.m_last_signal_was_red = false;
|
|
// negative look-ahead red-signal penalties would cause problems later, so use them as positive penalties for green signal
|
|
if (look_ahead_cost < 0) {
|
|
// add its negation to the cost
|
|
cost -= look_ahead_cost;
|
|
}
|
|
} else {
|
|
// we have a red signal in our direction
|
|
// was it first signal which is two-way?
|
|
if (Yapf().TreatFirstRedTwoWaySignalAsEOL() && n.flags_u.flags_s.m_choice_seen && has_signal_against && n.m_num_signals_passed == 0) {
|
|
// yes, the first signal is two-way red signal => DEAD END
|
|
n.m_segment->flags_u.flags_s.m_end_of_line = true;
|
|
Yapf().m_stopped_on_first_two_way_signal = true;
|
|
return -1;
|
|
}
|
|
SignalType sig_type = GetSignalType(tile);
|
|
n.m_last_red_signal_type = sig_type;
|
|
n.flags_u.flags_s.m_last_signal_was_red = true;
|
|
|
|
// look-ahead signal penalty
|
|
if (look_ahead_cost > 0) {
|
|
// add the look ahead penalty only if it is positive
|
|
cost += look_ahead_cost;
|
|
}
|
|
|
|
// special signal penalties
|
|
if (n.m_num_signals_passed == 0) {
|
|
switch (sig_type) {
|
|
case SIGTYPE_COMBO:
|
|
case SIGTYPE_EXIT: cost += Yapf().PfGetSettings().rail_firstred_exit_penalty; break; // first signal is red pre-signal-exit
|
|
case SIGTYPE_NORMAL:
|
|
case SIGTYPE_ENTRY: cost += Yapf().PfGetSettings().rail_firstred_penalty; break;
|
|
};
|
|
}
|
|
}
|
|
n.m_num_signals_passed++;
|
|
n.m_segment->m_last_signal_tile = tile;
|
|
n.m_segment->m_last_signal_td = trackdir;
|
|
}
|
|
}
|
|
return cost;
|
|
}
|
|
|
|
FORCEINLINE int PlatformLengthPenalty(int platform_length)
|
|
{
|
|
int cost = 0;
|
|
const Vehicle* v = Yapf().GetVehicle();
|
|
assert(v != NULL);
|
|
assert(v->type == VEH_Train);
|
|
assert(v->u.rail.cached_total_length != 0);
|
|
int needed_platform_length = (v->u.rail.cached_total_length + TILE_SIZE - 1) / TILE_SIZE;
|
|
if (platform_length > needed_platform_length) {
|
|
// apply penalty for longer platform than needed
|
|
cost += Yapf().PfGetSettings().rail_longer_platform_penalty;
|
|
} else if (needed_platform_length > platform_length) {
|
|
// apply penalty for shorter platform than needed
|
|
cost += Yapf().PfGetSettings().rail_shorter_platform_penalty;
|
|
}
|
|
return cost;
|
|
}
|
|
|
|
public:
|
|
FORCEINLINE void SetMaxCost(int max_cost) {m_max_cost = max_cost;}
|
|
|
|
/** 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)
|
|
{
|
|
assert(!n.flags_u.flags_s.m_targed_seen);
|
|
CPerfStart perf_cost(Yapf().m_perf_cost);
|
|
int parent_cost = (n.m_parent != NULL) ? n.m_parent->m_cost : 0;
|
|
int first_tile_cost = 0;
|
|
int segment_cost = 0;
|
|
int extra_cost = 0;
|
|
const Vehicle* v = Yapf().GetVehicle();
|
|
|
|
// start at n.m_key.m_tile / n.m_key.m_td and walk to the end of segment
|
|
TileIndex prev_tile = (n.m_parent != NULL) ? n.m_parent->GetLastTile() : INVALID_TILE;
|
|
Trackdir prev_trackdir = (n.m_parent != NULL) ? n.m_parent->GetLastTrackdir() : INVALID_TRACKDIR;
|
|
TileType prev_tile_type = (n.m_parent != NULL) ? GetTileType(n.m_parent->GetLastTile()) : MP_VOID;
|
|
|
|
TileIndex tile = n.m_key.m_tile;
|
|
Trackdir trackdir = n.m_key.m_td;
|
|
TileType tile_type = GetTileType(tile);
|
|
|
|
RailType rail_type = GetTileRailType(tile, trackdir);
|
|
|
|
bool target_seen = Yapf().PfDetectDestination(tile, trackdir);
|
|
|
|
while (true) {
|
|
segment_cost += Yapf().OneTileCost(tile, trackdir);
|
|
segment_cost += Yapf().CurveCost(prev_trackdir, trackdir);
|
|
segment_cost += Yapf().SlopeCost(tile, trackdir);
|
|
segment_cost += Yapf().SignalCost(n, tile, trackdir);
|
|
if (n.m_segment->flags_u.flags_s.m_end_of_line) {
|
|
break;
|
|
}
|
|
|
|
// finish if we have reached the destination
|
|
if (target_seen) {
|
|
break;
|
|
}
|
|
|
|
// finish on first station tile - segment should end here to avoid target skipping
|
|
// when cached segments are used
|
|
if (tile_type == MP_STATION && prev_tile_type != MP_STATION) {
|
|
break;
|
|
}
|
|
|
|
// finish also on waypoint - same workaround as for first station tile
|
|
if (tile_type == MP_RAILWAY && IsRailWaypoint(tile)) {
|
|
break;
|
|
}
|
|
|
|
// if there are no reachable trackdirs on the next tile, we have end of road
|
|
TrackFollower F(v, &Yapf().m_perf_ts_cost);
|
|
if (!F.Follow(tile, trackdir)) {
|
|
// we can't continue?
|
|
// n.m_segment->flags_u.flags_s.m_end_of_line = true;
|
|
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);
|
|
|
|
{
|
|
// end segment if train is about to enter simple loop with no junctions
|
|
// so next time it should stop on the next if
|
|
if (segment_cost > s_max_segment_cost && IsTileType(F.m_new_tile, MP_RAILWAY))
|
|
break;
|
|
|
|
// stop if train 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 tail type changes, finish segment (cached segment can't contain more rail types)
|
|
{
|
|
RailType new_rail_type = GetTileRailType(F.m_new_tile, (Trackdir)FindFirstBit2x64(F.m_new_td_bits));
|
|
if (new_rail_type != rail_type) {
|
|
break;
|
|
}
|
|
rail_type = new_rail_type;
|
|
}
|
|
|
|
// move to the next tile
|
|
prev_tile = tile;
|
|
prev_trackdir = trackdir;
|
|
prev_tile_type = tile_type;
|
|
|
|
tile = F.m_new_tile;
|
|
trackdir = new_td;
|
|
tile_type = GetTileType(tile);
|
|
|
|
target_seen = Yapf().PfDetectDestination(tile, trackdir);
|
|
|
|
// reversing in depot penalty
|
|
if (tile == prev_tile) {
|
|
segment_cost += Yapf().PfGetSettings().rail_depot_reverse_penalty;
|
|
break;
|
|
}
|
|
|
|
// if we skipped some tunnel tiles, add their cost
|
|
segment_cost += YAPF_TILE_LENGTH * F.m_tiles_skipped;
|
|
|
|
// add penalty for skipped station tiles
|
|
if (F.m_is_station)
|
|
{
|
|
if (target_seen) {
|
|
// it is our destination station
|
|
uint platform_length = F.m_tiles_skipped + 1;
|
|
segment_cost += PlatformLengthPenalty(platform_length);
|
|
} else {
|
|
// station is not our destination station, apply penalty for skipped platform tiles
|
|
segment_cost += Yapf().PfGetSettings().rail_station_penalty * F.m_tiles_skipped;
|
|
}
|
|
}
|
|
|
|
// add min/max speed penalties
|
|
int min_speed = 0;
|
|
int max_speed = F.GetSpeedLimit(&min_speed);
|
|
if (max_speed < v->max_speed)
|
|
segment_cost += YAPF_TILE_LENGTH * (v->max_speed - max_speed) / v->max_speed;
|
|
if (min_speed > v->max_speed)
|
|
segment_cost += YAPF_TILE_LENGTH * (min_speed - v->max_speed);
|
|
|
|
// finish if we already exceeded the maximum cost
|
|
if (m_max_cost > 0 && (parent_cost + first_tile_cost + segment_cost) > m_max_cost) {
|
|
return false;
|
|
}
|
|
|
|
if (first_tile_cost == 0) {
|
|
// we just have done first tile
|
|
first_tile_cost = segment_cost;
|
|
segment_cost = 0;
|
|
|
|
// look if we can reuse existing (cached) segment cost
|
|
if (n.m_segment->m_cost >= 0) {
|
|
// reuse the cached segment cost
|
|
break;
|
|
}
|
|
}
|
|
// segment cost was not filled yes, we have not cached it yet
|
|
n.SetLastTileTrackdir(tile, trackdir);
|
|
|
|
} // while (true)
|
|
|
|
if (first_tile_cost == 0) {
|
|
// we have just finished first tile
|
|
first_tile_cost = segment_cost;
|
|
segment_cost = 0;
|
|
}
|
|
|
|
// do we have cached segment cost?
|
|
if (n.m_segment->m_cost >= 0) {
|
|
// reuse the cached segment cost
|
|
segment_cost = n.m_segment->m_cost;
|
|
} else {
|
|
// save segment cost
|
|
n.m_segment->m_cost = segment_cost;
|
|
|
|
// save end of segment back to the node
|
|
n.SetLastTileTrackdir(tile, trackdir);
|
|
}
|
|
|
|
// special costs for the case we have reached our target
|
|
if (target_seen) {
|
|
n.flags_u.flags_s.m_targed_seen = true;
|
|
if (n.flags_u.flags_s.m_last_signal_was_red) {
|
|
if (n.m_last_red_signal_type == SIGTYPE_EXIT) {
|
|
// last signal was red pre-signal-exit
|
|
extra_cost += Yapf().PfGetSettings().rail_lastred_exit_penalty;
|
|
} else {
|
|
// last signal was red, but not exit
|
|
extra_cost += Yapf().PfGetSettings().rail_lastred_penalty;
|
|
}
|
|
}
|
|
}
|
|
|
|
// total node cost
|
|
n.m_cost = parent_cost + first_tile_cost + segment_cost + extra_cost;
|
|
|
|
return !n.m_segment->flags_u.flags_s.m_end_of_line;
|
|
}
|
|
|
|
FORCEINLINE bool CanUseGlobalCache(Node& n) const
|
|
{
|
|
return (n.m_parent != NULL)
|
|
&& (n.m_parent->m_num_signals_passed >= m_sig_look_ahead_costs.Size());
|
|
}
|
|
|
|
FORCEINLINE void ConnectNodeToCachedData(Node& n, CachedData& ci)
|
|
{
|
|
n.m_segment = &ci;
|
|
if (n.m_segment->m_cost < 0) {
|
|
n.m_segment->m_last_tile = n.m_key.m_tile;
|
|
n.m_segment->m_last_td = n.m_key.m_td;
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif /* YAPF_COSTRAIL_HPP */
|