summaryrefslogtreecommitdiff
path: root/yapf/yapf_destrail.hpp
blob: c7b3a63a0f9af41306d47bfd43d3442febd2611b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/* $Id$ */

#ifndef  YAPF_DESTRAIL_HPP
#define  YAPF_DESTRAIL_HPP

class CYapfDestinationRailBase
{
protected:
	RailTypeMask m_compatible_railtypes;

public:
	void SetDestination(Vehicle* v)
	{
		m_compatible_railtypes = v->u.rail.compatible_railtypes;
	}

	bool IsCompatibleRailType(RailType rt)
	{
		return HASBIT(m_compatible_railtypes, rt);
	}
};

template <class Types>
class CYapfDestinationAnyDepotRailT
	: public CYapfDestinationRailBase
{
public:
	typedef typename Types::Tpf Tpf;              ///< the pathfinder class (derived from THIS class)
	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.GetLastTile(), TRANSPORT_RAIL);
		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 CYapfDestinationTileOrStationRailT
	: public CYapfDestinationRailBase
{
public:
	typedef typename Types::Tpf Tpf;              ///< the pathfinder class (derived from THIS class)
	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;
	StationID    m_dest_station_id;

	/// to access inherited path finder
	Tpf& Yapf() {return *static_cast<Tpf*>(this);}

	static TileIndex CalcStationCenterTile(StationID station)
	{
		const Station* st = GetStation(station);

		uint x = TileX(st->train_tile) + st->trainst_w / 2;
		uint y = TileY(st->train_tile) + st->trainst_h / 2;
		// return the tile of our target coordinates
		return TileXY(x, y);
	}

public:
	void SetDestination(Vehicle* v)
	{
		if (v->current_order.type == OT_GOTO_STATION) {
			m_destTile = CalcStationCenterTile(v->current_order.station);
			m_dest_station_id = v->current_order.station;
			m_destTrackdirs = INVALID_TRACKDIR_BIT;
		} else {
			m_destTile = v->dest_tile;
			m_dest_station_id = INVALID_STATION;
			m_destTrackdirs = (TrackdirBits)(GetTileTrackStatus(v->dest_tile, TRANSPORT_RAIL) & TRACKDIR_BIT_MASK);
		}
		CYapfDestinationRailBase::SetDestination(v);
	}

	/// Called by YAPF to detect if node ends in the desired destination
	FORCEINLINE bool PfDetectDestination(Node& n)
	{
		bool bDest;
		if (m_dest_station_id != INVALID_STATION) {
			bDest = IsRailwayStationTile(n.GetLastTile())
				&& (GetStationIndex(n.GetLastTile()) == m_dest_station_id)
				&& (GetRailStationTrack(n.GetLastTile()) == TrackdirToTrack(n.GetLastTrackdir()));
		} else {
			bDest = (n.GetLastTile() == m_destTile)
				&& ((m_destTrackdirs & TrackdirToTrackdirBits(n.GetLastTrackdir())) != 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 */
	FORCEINLINE 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.GetLastTile();
		DiagDirection exitdir = TrackdirToExitdir(n.GetLastTrackdir());
		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;
	}
};


#endif /* YAPF_DESTRAIL_HPP */