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Refactor/de-duplicate rail station bridge above check methods

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This commit is contained in:
Jonathan G Rennison
2018-11-14 20:23:56 +00:00
parent beaddc8a98
commit 6df12e77b6
2 changed files with 15 additions and 14 deletions
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16
src/station_cmd.cpp
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@@ -775,22 +775,30 @@ CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z
return cost;
}
bool IsRailStationBridgeAboveOk(TileIndex tile, const StationSpec *statspec, byte layout)
bool IsRailStationBridgeAboveOk(TileIndex tile, const StationSpec *statspec, byte layout, TileIndex northern_bridge_end, TileIndex southern_bridge_end, int bridge_height)
{
assert(layout < 8);
if (!IsBridgeAbove(tile)) return true;
if (statspec && HasBit(statspec->internal_flags, SSIF_BRIDGE_HEIGHTS_SET)) {
return (GetTileMaxZ(tile) + statspec->bridge_height[layout] <= GetBridgeHeight(GetSouthernBridgeEnd(tile)));
return (GetTileMaxZ(tile) + statspec->bridge_height[layout] <= bridge_height);
} else if (!statspec) {
// default stations/waypoints
const int height = layout < 4 ? 2 : 5;
return (GetTileMaxZ(tile) + height <= GetBridgeHeight(GetSouthernBridgeEnd(tile)));
return (GetTileMaxZ(tile) + height <= bridge_height);
} else {
return _settings_game.construction.allow_stations_under_bridges;
}
}
bool IsRailStationBridgeAboveOk(TileIndex tile, const StationSpec *statspec, byte layout)
{
if (!IsBridgeAbove(tile)) return true;
TileIndex southern_bridge_end = GetSouthernBridgeEnd(tile);
TileIndex northern_bridge_end = GetNorthernBridgeEnd(tile);
return IsRailStationBridgeAboveOk(tile, statspec, layout, northern_bridge_end, southern_bridge_end, GetBridgeHeight(southern_bridge_end));
}
/**
* Checks if a rail station can be built at the given area.
* @param tile_area Area to check.