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annotate src/tunnel_map.cpp @ 6261:a2ab35efe1ab draft

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(svn r9070) -Fix [FS#404]: if bribe failed and you didn't pick up cargo yet, you wouldn't ever be able to do so for a given station
author truelight <truelight@openttd.org>
date Thu, 08 Mar 2007 20:50:27 +0000
parents 4b26bd55bd24
children fb10eafe2a26
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5584
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1 /* $Id$ */
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2
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3 #include "stdafx.h"
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4 #include "openttd.h"
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5 #include "tile.h"
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6 #include "tunnel_map.h"
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7
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8 TileIndex GetOtherTunnelEnd(TileIndex tile)
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9 {
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10 DiagDirection dir = GetTunnelDirection(tile);
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11 TileIndexDiff delta = TileOffsByDiagDir(dir);
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12 uint z = GetTileZ(tile);
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13
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14 dir = ReverseDiagDir(dir);
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15 do {
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16 tile += delta;
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17 } while (
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18 !IsTunnelTile(tile) ||
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19 GetTunnelDirection(tile) != dir ||
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20 GetTileZ(tile) != z
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21 );
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22
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23 return tile;
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24 }
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27 static bool IsTunnelInWayDir(TileIndex tile, uint z, DiagDirection dir)
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28 {
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29 TileIndexDiff delta = TileOffsByDiagDir(dir);
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30 uint height;
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32 do {
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33 tile -= delta;
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34 height = GetTileZ(tile);
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35 } while (z < height);
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36
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37 return
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38 z == height &&
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39 IsTunnelTile(tile) &&
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40 GetTunnelDirection(tile) == dir;
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41 }
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42
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43 bool IsTunnelInWay(TileIndex tile, uint z)
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44 {
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45 return
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46 IsTunnelInWayDir(tile, z, DIAGDIR_NE) ||
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47 IsTunnelInWayDir(tile, z, DIAGDIR_SE) ||
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48 IsTunnelInWayDir(tile, z, DIAGDIR_SW) ||
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49 IsTunnelInWayDir(tile, z, DIAGDIR_NW);
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50 }