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32 lines
614 B
C
32 lines
614 B
C
/* $Id$ */
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#include "stdafx.h"
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#include "openttd.h"
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#include "tile.h"
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#include "tunnel_map.h"
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static bool IsTunnelInWayDir(TileIndex tile, uint z, DiagDirection dir)
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{
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TileIndexDiff delta = TileOffsByDir(dir);
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uint height;
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do {
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tile -= delta;
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height = GetTileZ(tile);
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} while (z < height);
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return
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z == height &&
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IsTunnelTile(tile) &&
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GetTunnelDirection(tile) == dir;
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}
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bool IsTunnelInWay(TileIndex tile, uint z)
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{
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return
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IsTunnelInWayDir(tile, z, DIAGDIR_NE) ||
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IsTunnelInWayDir(tile, z, DIAGDIR_SE) ||
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IsTunnelInWayDir(tile, z, DIAGDIR_SW) ||
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IsTunnelInWayDir(tile, z, DIAGDIR_NW);
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}
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