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/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file tunnel_map.cpp Map accessors for tunnels. */
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#include "stdafx.h"
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#include "tunnelbridge_map.h"
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#include "core/pool_func.hpp"
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#include "safeguards.h"
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/** All tunnel portals tucked away in a pool. */
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TunnelPool _tunnel_pool("Tunnel");
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INSTANTIATE_POOL_METHODS(Tunnel)
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/**
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* Clean up a tunnel tile
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*/
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Tunnel::~Tunnel()
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{
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if (CleaningPool()) return;
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}
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/**
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* Gets the other end of the tunnel. Where a vehicle would reappear when it
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* enters at the given tile.
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* @param tile the tile to search from.
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* @return the tile of the other end of the tunnel.
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*/
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TileIndex GetOtherTunnelEnd(TileIndex tile)
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{
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Tunnel *t = Tunnel::GetByTile(tile);
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return t->tile_n == tile ? t->tile_s : t->tile_n;
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}
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/**
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* Is there a tunnel in the way in any direction?
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* @param tile the tile to search from.
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* @param z the 'z' to search on.
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* @param not_allowed Only terra forming does not search between tunnel portals.
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* @return true if and only if there is a tunnel.
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*/
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bool IsTunnelInWay(TileIndex tile, int z, bool not_allowed)
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{
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uint x = TileX(tile);
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uint y = TileY(tile);
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Tunnel *t;
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FOR_ALL_TUNNELS(t) {
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if (t->tile_n > tile || tile > t->tile_s) continue;
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if (t->tile_s - t->tile_n > MapMaxX()){
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if (TileX(t->tile_n) != x || (int)TileHeight(t->tile_n) != z) continue; // dir DIAGDIR_SE
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} else {
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if (TileY(t->tile_n) != y || (int)TileHeight(t->tile_n) != z) continue; // dir DIAGDIR_SW
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}
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if (t->is_chunnel > not_allowed) {
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/* Only if tunnel was build over water terraforming is allowed between portals. */
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TileIndexDiff delta = GetTunnelBridgeDirection(t->tile_n) == DIAGDIR_SE ? TileOffsByDiagDir(DIAGDIR_SE) * 4 : 4; // 4 tiles ramp.
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if (tile < t->tile_n + delta || t->tile_s - delta < tile) return true;
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continue;
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}
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return true;
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}
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return false;
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}
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