/**
* Is this tile a target for ships to get to a nearby dock?
* @param tile Tile to query
* @param diagdir Optional diagonal direction to look for axis compatibility.
* @return True if the tile is a target for ships to get to a nearby dock.
* @note If the axis of the provided diagdir is paralel to the axis of a nearby
* dock station, this function returns True. If diagdir is not provided,
* only tile locations are compared.
*/
static inline bool IsTileDock(TileIndex tile, DiagDirection diagdir = INVALID_DIAGDIR)
{
Axis axis = diagdir == INVALID_DIAGDIR ? INVALID_AXIS : DiagDirToAxis(diagdir);
for (DiagDirection rot = DIAGDIR_BEGIN; rot < DIAGDIR_END; rot++) {
TileIndex tc = TileAddByDiagDir(tile, rot);
if (IsTileType(tc, MP_STATION) && (IsDock(tc) || IsOilRig(tc))) {
Station *dock = Station::GetByTile(tc);
TileIndex docking_location = TILE_ADD(dock->dock_tile, ToTileIndexDiff(GetDockOffset(dock->dock_tile)));
if (axis == INVALID_AXIS) {
return tile == docking_location;
}
else {
if (tile == docking_location) {
Axis axis_tc = DiagDirToAxis(rot);
return axis != axis_tc;
}
}
}
if (rot == DIAGDIR_NE && IsTileType(tc + TileDiffXY(-1, 0), MP_INDUSTRY) && GetIndustryGfx(tc + TileDiffXY(-1, 0)) == GFX_OILRIG_1) return true;
}
return false;
}