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52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
/* $Id$ */
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#include "stdafx.h"
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#include "openttd.h"
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#include "bridge_map.h"
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#include "variables.h"
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TileIndex GetBridgeEnd(TileIndex tile, DiagDirection dir)
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{
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TileIndexDiff delta = TileOffsByDiagDir(dir);
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dir = ReverseDiagDir(dir);
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do {
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tile += delta;
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} while (!IsBridgeTile(tile) || GetBridgeRampDirection(tile) != dir);
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return tile;
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}
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TileIndex GetNorthernBridgeEnd(TileIndex t)
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{
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return GetBridgeEnd(t, ReverseDiagDir(AxisToDiagDir(GetBridgeAxis(t))));
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}
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TileIndex GetSouthernBridgeEnd(TileIndex t)
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{
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return GetBridgeEnd(t, AxisToDiagDir(GetBridgeAxis(t)));
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}
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TileIndex GetOtherBridgeEnd(TileIndex tile)
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{
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assert(IsBridgeTile(tile));
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return GetBridgeEnd(tile, GetBridgeRampDirection(tile));
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}
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uint GetBridgeHeight(TileIndex t)
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{
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uint h;
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uint tileh = GetTileSlope(t, &h);
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uint f = GetBridgeFoundation(tileh, DiagDirToAxis(GetBridgeRampDirection(t)));
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// one height level extra if the ramp is on a flat foundation
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return
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h + TILE_HEIGHT +
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(IS_INT_INSIDE(f, 1, 15) ? TILE_HEIGHT : 0) +
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(IsSteepSlope(tileh) ? TILE_HEIGHT : 0);
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}
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