diff options
| -rw-r--r-- | clear_cmd.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/clear_cmd.c b/clear_cmd.c index 19b475124..62331b73c 100644 --- a/clear_cmd.c +++ b/clear_cmd.c @@ -94,20 +94,19 @@ static int TerraformProc(TerraformerState *ts, TileIndex tile, int mode) assert(tile < MapSize()); - if ((r=TerraformAllowTileProcess(ts, tile)) <= 0) - return r; + r = TerraformAllowTileProcess(ts, tile); + if (r <= 0) return r; if (IsTileType(tile, MP_RAILWAY)) { - static const TrackBits _railway_modes[] = { TRACK_BIT_LOWER, TRACK_BIT_LEFT, TRACK_BIT_UPPER, TRACK_BIT_RIGHT }; - static const byte _railway_dangslopes[4] = {0xd, 0xe, 7, 0xb}; - static const byte _railway_dangslopes2[4] = {0x2, 0x1, 0x8, 0x4}; + static const TrackBits safe_track[] = { TRACK_BIT_LOWER, TRACK_BIT_LEFT, TRACK_BIT_UPPER, TRACK_BIT_RIGHT }; + static const Slope unsafe_slope[] = { SLOPE_S, SLOPE_W, SLOPE_N, SLOPE_E }; // Nothing could be built at the steep slope - this avoids a bug // when you have a single diagonal track in one corner on a // basement and then you raise/lower the other corner. - int tileh = GetTileSlope(tile, NULL) & 0xF; - if (tileh == _railway_dangslopes[mode] || - tileh == _railway_dangslopes2[mode]) { + Slope tileh = GetTileSlope(tile, NULL); + if (tileh == unsafe_slope[mode] || + tileh == ComplementSlope(unsafe_slope[mode])) { _terraform_err_tile = tile; _error_message = STR_1008_MUST_REMOVE_RAILROAD_TRACK; return -1; @@ -115,7 +114,7 @@ static int TerraformProc(TerraformerState *ts, TileIndex tile, int mode) // If we have a single diagonal track there, the other side of // tile can be terraformed. - if (IsPlainRailTile(tile) && GetTrackBits(tile) == _railway_modes[mode]) { + if (IsPlainRailTile(tile) && GetTrackBits(tile) == safe_track[mode]) { return 0; } } |