diff options
Diffstat (limited to 'src/tunnelbridge_cmd.cpp')
| -rw-r--r-- | src/tunnelbridge_cmd.cpp | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp index d4b794633..b3778a932 100644 --- a/src/tunnelbridge_cmd.cpp +++ b/src/tunnelbridge_cmd.cpp @@ -52,6 +52,33 @@ TileIndex _build_tunnel_endtile; ///< The end of a tunnel; as hidden return from /** Z position of the bridge sprites relative to bridge height (downwards) */ static const int BRIDGE_Z_START = 3; + +/** + * Mark bridge tiles dirty. + * Note: The bridge does not need to exist, everything is passed via parameters. + * @param begin Start tile. + * @param end End tile. + * @param direction Direction from \a begin to \a end. + * @param bridge_height Bridge height level. + */ +void MarkBridgeDirty(TileIndex begin, TileIndex end, DiagDirection direction, uint bridge_height) +{ + TileIndexDiff delta = TileOffsByDiagDir(direction); + for (TileIndex t = begin; t != end; t += delta) { + MarkTileDirtyByTile(t, bridge_height - TileHeight(t)); + } + MarkTileDirtyByTile(end); +} + +/** + * Mark bridge tiles dirty. + * @param tile Bridge head. + */ +void MarkBridgeDirty(TileIndex tile) +{ + MarkBridgeDirty(tile, GetOtherTunnelBridgeEnd(tile), GetTunnelBridgeDirection(tile), GetBridgeHeight(tile)); +} + /** Reset the data been eventually changed by the grf loaded. */ void ResetBridges() { @@ -506,10 +533,7 @@ CommandCost CmdBuildBridge(TileIndex end_tile, DoCommandFlag flags, uint32 p1, u } /* Mark all tiles dirty */ - TileIndexDiff delta = (direction == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1)); - for (TileIndex tile = tile_start; tile <= tile_end; tile += delta) { - MarkTileDirtyByTile(tile); - } + MarkBridgeDirty(tile_start, tile_end, AxisToDiagDir(direction), z_start); DirtyCompanyInfrastructureWindows(owner); } @@ -926,7 +950,7 @@ static CommandCost DoClearBridge(TileIndex tile, DoCommandFlag flags) if (height < minz) SetRoadside(c, ROADSIDE_PAVED); } ClearBridgeMiddle(c); - MarkTileDirtyByTile(c); + MarkTileDirtyByTile(c, height - TileHeight(c)); } if (rail) { |