diff options
Diffstat (limited to 'rail_cmd.c')
| -rw-r--r-- | rail_cmd.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/rail_cmd.c b/rail_cmd.c index e3cecd926..2b89a8977 100644 --- a/rail_cmd.c +++ b/rail_cmd.c @@ -118,7 +118,7 @@ static bool CheckTrackCombination(byte map5, byte trackbits, byte flags) } -static const byte _valid_tileh_slopes[3][15] = { +static const byte _valid_tileh_slopes[4][15] = { // set of normal ones { @@ -184,6 +184,15 @@ static const byte _valid_tileh_slopes[3][15] = { RAIL_BIT_DIAG2|RAIL_BIT_RIGHT|RAIL_BIT_UPPER, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, RAIL_BIT_DIAG1|RAIL_BIT_DIAG2|RAIL_BIT_UPPER|RAIL_BIT_LOWER|RAIL_BIT_LEFT|RAIL_BIT_RIGHT, + }, + + // valid railway crossings on slopes + { + 1, 0, 0, // 0, 1, 2 + 0, 0, 1, // 3, 4, 5 + 0, 1, 0, // 6, 7, 8 + 0, 1, 1, // 9, 10, 11 + 0, 1, 1, // 12, 13, 14 } }; @@ -275,8 +284,12 @@ int32 CmdBuildSingleRail(int x, int y, uint32 flags, uint32 p1, uint32 p2) } else if (ti.type == MP_STREET) { byte m5; /* BUILD ON STREET CODE */ - if (ti.tileh != 0) goto need_clear; - + if (ti.tileh & 0x10) // very steep tile + return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); + + if (!_valid_tileh_slopes[3][ti.tileh]) // prevent certain slopes + return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); + if (!(ti.map5 & 0xF0)) { if ((ti.map5 & 0x0F) == 0xA) { if (rail_bit != 2) goto need_clear; @@ -1652,7 +1665,7 @@ uint GetSlopeZ_Track(TileInfo *ti) { uint z = ti->z; int th = ti->tileh; - + // check if it's a foundation if (ti->tileh != 0) { if ((ti->map5 & 0x80) == 0) { |