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Change: Hide bridge pillars if obstructed by tile below.

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Tiles can now control if pillars are drawn on a bridge above it. There is no visible change with default bridges.
This commit is contained in:
Peter Nelson
2025-08-14 17:32:05 +01:00
committed by Peter Nelson
parent 48b42492bc
commit 0a1c0b8b48
7 changed files with 70 additions and 13 deletions
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src/road_cmd.cpp
+12 -2
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@@ -1699,9 +1699,18 @@ static void DrawRoadBits(TileInfo *ti)
/** Tile callback function for rendering a road tile to the screen */
static void DrawTile_Road(TileInfo *ti)
{
BridgePillarFlags blocked_pillars{};
switch (GetRoadTileType(ti->tile)) {
case ROAD_TILE_NORMAL:
DrawRoadBits(ti);
if (IsBridgeAbove(ti->tile)) {
RoadBits bits = GetAllRoadBits(ti->tile);
if ((bits & ROAD_NE) != 0) blocked_pillars.Set(BridgePillarFlag::EdgeNE);
if ((bits & ROAD_SE) != 0) blocked_pillars.Set(BridgePillarFlag::EdgeSE);
if ((bits & ROAD_SW) != 0) blocked_pillars.Set(BridgePillarFlag::EdgeSW);
if ((bits & ROAD_NW) != 0) blocked_pillars.Set(BridgePillarFlag::EdgeNW);
}
break;
case ROAD_TILE_CROSSING: {
@@ -1809,7 +1818,7 @@ static void DrawTile_Road(TileInfo *ti)
/* Draw rail catenary */
if (HasRailCatenaryDrawn(GetRailType(ti->tile))) DrawRailCatenary(ti);
blocked_pillars = {BridgePillarFlag::EdgeSW, BridgePillarFlag::EdgeNE, BridgePillarFlag::EdgeNW, BridgePillarFlag::EdgeSE};
break;
}
@@ -1855,10 +1864,11 @@ static void DrawTile_Road(TileInfo *ti)
}
DrawRailTileSeq(ti, dts, TO_BUILDINGS, relocation, 0, palette);
/* Depots can't have bridges above so no blocked pillars. */
break;
}
}
DrawBridgeMiddle(ti);
DrawBridgeMiddle(ti, blocked_pillars);
}
/**