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(svn r3992) -Fix: Rewrote the code to determine whether a rail-tile can be terraformed.

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Fixes a bug where you could terraform a tunnel (fixed by r3228, but reverted that one)
Fixes a bug introduced by r3228 which allowed steep rail tiles resulting in ... unwanted effects such as display artifacts.
That means the terraform feature should not work as intended; it also uses _valid_tileh_slopes to determine valid configurations instead of hand-brewn stuff.
TODO: _terraform_err_tile and similar TileIndices should have INVALID_TILE as "unused", not 0. (0 is a valid tile).
This commit is contained in:
celestar
2006-03-20 16:43:48 +00:00
parent f91b027bea
commit b5b348bdce
5 changed files with 53 additions and 57 deletions
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6
viewport.c
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@@ -634,7 +634,7 @@ static void DrawTileSelection(const TileInfo *ti)
#endif
// Draw a red error square?
if (_thd.redsq != 0 && _thd.redsq == ti->tile) {
if (_thd.redsq != INVALID_TILE && _thd.redsq == ti->tile) {
DrawSelectionSprite(PALETTE_TILE_RED_PULSATING | (SPR_SELECT_TILE + _tileh_to_sprite[ti->tileh]), ti);
return;
}
@@ -1812,8 +1812,8 @@ void SetRedErrorSquare(TileIndex tile)
_thd.redsq = tile;
if (tile != old) {
if (tile != 0) MarkTileDirtyByTile(tile);
if (old != 0) MarkTileDirtyByTile(old);
if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
if (old != INVALID_TILE) MarkTileDirtyByTile(old);
}
}