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(svn r22659) -Add: [NewGRF] Support for the land slope check callback for stations.

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michi_cc
2011-07-11 16:32:35 +00:00
parent e5dd6f9227
commit d579af11e8
7 changed files with 72 additions and 8 deletions
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20
src/station_cmd.cpp
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@@ -749,22 +749,36 @@ CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
* Checks if a rail station can be built at the given area.
* @param tile_area Area to check.
* @param flags Operation to perform.
* @param invalid_dirs Prohibited directions (set of #DiagDirection).
* @param axis Rail station axis.
* @param station StationID to be queried and returned if available.
* @param rt The rail type to check for (overbuilding rail stations over rail).
* @param affected_vehicles List of trains with PBS reservations on the tiles
* @param spec_class Station class.
* @param spec_index Index into the station class.
* @param plat_len Platform length.
* @param numtracks Number of platforms.
* @return The cost in case of success, or an error code if it failed.
*/
static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles)
static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, Axis axis, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles, StationClassID spec_class, byte spec_index, byte plat_len, byte numtracks)
{
CommandCost cost(EXPENSES_CONSTRUCTION);
int allowed_z = -1;
uint invalid_dirs = 5 << axis;
const StationSpec *statspec = StationClass::Get(spec_class, spec_index);
bool slope_cb = statspec != NULL && HasBit(statspec->callback_mask, CBM_STATION_SLOPE_CHECK);
TILE_AREA_LOOP(tile_cur, tile_area) {
CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z);
if (ret.Failed()) return ret;
cost.AddCost(ret);
if (slope_cb) {
/* Do slope check if requested. */
ret = PerformStationTileSlopeCheck(tile_area.tile, tile_cur, statspec, axis, plat_len, numtracks);
if (ret.Failed()) return ret;
}
/* if station is set, then we have special handling to allow building on top of already existing stations.
* so station points to INVALID_STATION if we can build on any station.
* Or it points to a station if we're only allowed to build on exactly that station. */
@@ -1140,7 +1154,7 @@ CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32
StationID est = INVALID_STATION;
SmallVector<Train *, 4> affected_vehicles;
/* Clear the land below the station. */
CommandCost cost = CheckFlatLandRailStation(TileArea(tile_org, w_org, h_org), flags, 5 << axis, &est, rt, affected_vehicles);
CommandCost cost = CheckFlatLandRailStation(TileArea(tile_org, w_org, h_org), flags, axis, &est, rt, affected_vehicles, spec_class, spec_index, plat_len, numtracks);
if (cost.Failed()) return cost;
/* Add construction expenses. */
cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);