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Old revision #pee8qlkwuNew revision #ph2ugbbgr
9    if (!IsValidTile(tile) || !IsCoastTile(tile)) return false;  9    if (!IsValidTile(tile) || !IsCoastTile(tile)) return false;  
10  10  
11    Slope slope = GetTileSlope(tile);  11    Slope slope = GetTileSlope(tile);  
  12  
12    /* Is this a coast tile with one corner raised ? */  13    /* Is this a coast tile with one corner raised ? */  
13    if (IsSlopeWithOneCornerRaised(slope)) {  14    if (IsSlopeWithOneCornerRaised(slope)) {  
14        const Track main_track_mask = TrackBitsToTrack(TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0)));    
15        const Track oppo_track_mask = TrackToOppositeTrack(main_track_mask);    
16        const Trackdir main_trackdir = TrackToTrackdir(main_track_mask);    
17        const Trackdir oppo_trackdir = TrackToTrackdir(oppo_track_mask);    
18        const DiagDirection main_dir_1 = TrackdirToExitdir(main_trackdir);    
19        const DiagDirection main_dir_2 = TrackdirToExitdir(ReverseTrackdir(main_trackdir));    
20        const DiagDirection oppo_dir_1 = TrackdirToExitdir(oppo_trackdir);    
21        const DiagDirection oppo_dir_2 = TrackdirToExitdir(ReverseTrackdir(oppo_trackdir));    
22    
23        TrackBits main_trackbits_mask_1 = DiagdirReachesTracks(main_dir_1);    
24        TrackBits main_trackbits_mask_2 = DiagdirReachesTracks(main_dir_2);    
25        TrackBits oppo_trackbits_mask_1 = DiagdirReachesTracks(oppo_dir_1);    
26        TrackBits oppo_trackbits_mask_2 = DiagdirReachesTracks(oppo_dir_2);    
27    
28        if (_settings_game.pf.forbid_90_deg) {    
29            main_trackbits_mask_1 &= ~TrackCrossesTracks(main_track_mask);    
30            main_trackbits_mask_2 &= ~TrackCrossesTracks(main_track_mask);    
31            oppo_trackbits_mask_1 &= ~TrackCrossesTracks(oppo_track_mask);    
32            oppo_trackbits_mask_2 &= ~TrackCrossesTracks(oppo_track_mask);    
33        }    
34    
35        Corner corner = GetHighestSlopeCorner(slope);  15        Corner corner = GetHighestSlopeCorner(slope);  
36        static const Direction corner_to_direction[] = { DIR_W, DIR_S, DIR_E, DIR_N };  16        static const Direction corner_to_direction[] = { DIR_W, DIR_S, DIR_E, DIR_N };  
37        TileIndex opposite_tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDir(corner_to_direction[OppositeCorner(corner)]));  17        TileIndex opposite_tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDir(corner_to_direction[OppositeCorner(corner)]));  
38  18  
39        if (IsValidTile(opposite_tile)) {  19        if (IsValidTile(opposite_tile)) {  
  20            Track main_track_mask = TrackBitsToTrack(TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0)));  
  21            Trackdir main_trackdir = TrackToTrackdir(main_track_mask);  
  22  
  23            DiagDirection main_dir_1 = TrackdirToExitdir(main_trackdir);  
  24            DiagDirection main_dir_2 = TrackdirToExitdir(ReverseTrackdir(main_trackdir));  
  25  
40            TileIndex tile_1 = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(main_dir_1));  26            TileIndex tile_1 = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(main_dir_1));  
41            TileIndex tile_2 = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(main_dir_2));  27            TileIndex tile_2 = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(main_dir_2));  
42  28  
43            TrackBits track_1 = TrackStatusToTrackBits(GetTileTrackStatus(tile_1, TRANSPORT_WATER, 0));  29            TrackBits track_1 = TrackStatusToTrackBits(GetTileTrackStatus(tile_1, TRANSPORT_WATER, 0));  
44            TrackBits track_2 = TrackStatusToTrackBits(GetTileTrackStatus(tile_2, TRANSPORT_WATER, 0));  30            TrackBits track_2 = TrackStatusToTrackBits(GetTileTrackStatus(tile_2, TRANSPORT_WATER, 0));  
45  31  
  32            TrackBits main_trackbits_mask_1 = DiagdirReachesTracks(main_dir_1);  
  33            TrackBits main_trackbits_mask_2 = DiagdirReachesTracks(main_dir_2);  
  34  
46            TrackBits main_track_1 = main_trackbits_mask_1 & track_1;  35            TrackBits main_track_1 = main_trackbits_mask_1 & track_1;  
47            TrackBits main_track_2 = main_trackbits_mask_2 & track_2;  36            TrackBits main_track_2 = main_trackbits_mask_2 & track_2;  
48            TrackBits oppo_track_1 = oppo_trackbits_mask_1 & track_1;    
49            TrackBits oppo_track_2 = oppo_trackbits_mask_2 & track_2;    
50  37  
51            /* Is there a connection between tile_1 and tile_2 via tile? */  38            /* Is there a connection between tile_1 and tile_2 via tile? */  
52            if (main_track_1 && main_track_2) {  39            if (main_track_1 && main_track_2) {  
53                TrackBits oppo_trackbits = TrackStatusToTrackBits(GetTileTrackStatus(opposite_tile, TRANSPORT_WATER, 0));  40                TrackBits oppo_trackbits = TrackStatusToTrackBits(GetTileTrackStatus(opposite_tile, TRANSPORT_WATER, 0));  
  41                Track oppo_track_mask = TrackToOppositeTrack(main_track_mask);  
  42  
54                /* Is there a track in the opposite_tile that can be used to try an alternative connection? */  43                /* Is there a track in the opposite_tile that can be used to try an alternative connection? */  
55                if (HasTrack(oppo_trackbits, oppo_track_mask)) {  44                if (HasTrack(oppo_trackbits, oppo_track_mask)) {  
56                    TrackBits mirror = TRACK_BIT_CROSS | (corner & 1 ? TRACK_BIT_HORZ : TRACK_BIT_VERT);  45                    TrackBits mirror = TRACK_BIT_CROSS | (corner & 1 ? TRACK_BIT_HORZ : TRACK_BIT_VERT);  
  46  
  47                    Trackdir oppo_trackdir = TrackToTrackdir(oppo_track_mask);  
  48  
  49                    DiagDirection oppo_dir_1 = TrackdirToExitdir(oppo_trackdir);  
  50                    DiagDirection oppo_dir_2 = TrackdirToExitdir(ReverseTrackdir(oppo_trackdir));  
  51  
  52                    TrackBits oppo_trackbits_mask_1 = DiagdirReachesTracks(oppo_dir_1);  
  53                    TrackBits oppo_trackbits_mask_2 = DiagdirReachesTracks(oppo_dir_2);  
  54  
  55                    TrackBits oppo_track_1 = oppo_trackbits_mask_1 & track_1;  
  56                    TrackBits oppo_track_2 = oppo_trackbits_mask_2 & track_2;  
  57  
57                    /* Is there a connection between tile_1 and tile_2 via opposite_tile? */  58                    /* Is there a connection between tile_1 and tile_2 via opposite_tile? */  
58                    if (oppo_track_1 & (main_track_1 ^ mirror) && oppo_track_2 & (main_track_2 ^ mirror)) {  59                    if (oppo_track_1 & (main_track_1 ^ mirror) && oppo_track_2 & (main_track_2 ^ mirror)) {  
59                        /* There is an alternative connection. Town can grow on tile. */  60                        /* There is an alternative connection. Town can grow on tile. */