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(svn r1696) Use GetTileSlope() instead of FindLandscapeHeightByTile() where it is sufficient. FindLandscapeHeightByTile() uses GetTileSlope() internally and adds some more info, which is discarded in these cases.

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While touching the code make a bit more clear how GetBridgeHeight() works.
This commit is contained in:
tron 2005-01-27 12:52:20 +00:00
parent 6eec07257a
commit 63653bd6af
3 changed files with 10 additions and 19 deletions
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8
train_cmd.c
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@ -2049,13 +2049,13 @@ static bool CheckCompatibleRail(const Vehicle *v, TileIndex tile)
case MP_TUNNELBRIDGE:
if ((_map5[tile] & 0xC0) == 0xC0) { // is bridge middle part?
TileInfo ti;
FindLandscapeHeightByTile(&ti, tile);
uint height;
uint tileh = GetTileSlope(tile, &height);
// correct Z position of a train going under a bridge on slopes
if (CORRECT_Z(ti.tileh)) ti.z += 8;
if (CORRECT_Z(tileh)) height += 8;
if (v->z_pos != ti.z) return true; // train is going over bridge
if (v->z_pos != height) return true; // train is going over bridge
}
break;

16
tunnelbridge_cmd.c
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@ -905,9 +905,7 @@ int32 DoConvertTunnelBridgeRail(uint tile, uint totype, bool exec)
static uint GetBridgeHeight(const TileInfo *ti)
{
uint delta;
TileInfo ti_end;
uint tile = ti->tile;
uint z_correction = 0;
TileIndex tile = ti->tile;
// find the end tile of the bridge.
delta = (_map5[tile] & 1) ? TILE_XY(0,1) : TILE_XY(1,0);
@ -916,14 +914,10 @@ static uint GetBridgeHeight(const TileInfo *ti)
tile += delta;
} while (_map5[tile] & 0x40); // while bridge middle parts
// if the end of the bridge is on a tileh 7, the z coordinate is 1 tile too low
// correct it.
FindLandscapeHeightByTile(&ti_end, tile);
if (HASBIT(1 << 7, ti_end.tileh))
z_correction += 8;
// return the height there (the height of the NORTH CORNER)
return TilePixelHeight(tile) + z_correction;
/* Return the height there (the height of the NORTH CORNER)
* If the end of the bridge is on a tileh 7 (all raised, except north corner),
* the z coordinate is 1 height level too low. Compensate for that */
return TilePixelHeight(tile) + (GetTileSlope(tile, NULL) == 7 ? 8 : 0);
}
static const byte _bridge_foundations[2][16] = {

5
vehicle.c
View File

@ -82,10 +82,7 @@ static inline uint Correct_Z(uint tileh)
uint GetCorrectTileHeight(TileIndex tile)
{
TileInfo ti;
FindLandscapeHeightByTile(&ti, tile);
return Correct_Z(ti.tileh);
return Correct_Z(GetTileSlope(tile, NULL));
}
bool EnsureNoVehicleZ(TileIndex tile, byte z)