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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 bridge_map.cpp Map accessor functions for bridges. */
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#include "stdafx.h"
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#include "landscape.h"
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#include "tunnelbridge_map.h"
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#include "bridge_signal_map.h"
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#include "debug.h"
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#include "safeguards.h"
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/**
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* Finds the end of a bridge in the specified direction starting at a middle tile
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* @param tile the bridge tile to find the bridge ramp for
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* @param dir the direction to search in
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*/
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static 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) || GetTunnelBridgeDirection(tile) != dir);
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return tile;
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}
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/**
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* Finds the northern end of a bridge starting at a middle tile
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* @param t the bridge tile to find the bridge ramp for
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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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/**
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* Finds the southern end of a bridge starting at a middle tile
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* @param t the bridge tile to find the bridge ramp for
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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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/**
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* Starting at one bridge end finds the other bridge end
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* @param t the bridge ramp tile to find the other bridge ramp for
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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, GetTunnelBridgeDirection(tile));
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}
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/**
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* Get the height ('z') of a bridge.
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* @param tile the bridge ramp tile to get the bridge height from
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* @return the height of the bridge.
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*/
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int GetBridgeHeight(TileIndex t)
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{
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int h;
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Slope tileh = GetTileSlope(t, &h);
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Foundation f = GetBridgeFoundation(tileh, DiagDirToAxis(GetTunnelBridgeDirection(t)));
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/* one height level extra for the ramp */
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return h + 1 + ApplyFoundationToSlope(f, &tileh);
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}
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std::unordered_map<TileIndex, LongBridgeSignalStorage> _long_bridge_signal_sim_map;
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SignalState GetBridgeEntranceSimulatedSignalStateExtended(TileIndex t, uint16 signal)
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{
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const auto it = _long_bridge_signal_sim_map.find(t);
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if (it != _long_bridge_signal_sim_map.end()) {
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const LongBridgeSignalStorage &lbss = it->second;
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uint16 offset = signal - 15;
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uint16 slot = offset >> 6;
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uint16 bit = offset & 0x3F;
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if (slot >= lbss.signal_red_bits.size()) return SIGNAL_STATE_GREEN;
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return GB(lbss.signal_red_bits[slot], bit, 1) ? SIGNAL_STATE_RED : SIGNAL_STATE_GREEN;
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} else {
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return SIGNAL_STATE_GREEN;
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}
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}
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void SetBridgeEntranceSimulatedSignalStateExtended(TileIndex t, uint16 signal, SignalState state)
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{
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LongBridgeSignalStorage &lbss = _long_bridge_signal_sim_map[t];
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uint16 offset = signal - 15;
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uint16 slot = offset >> 6;
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uint16 bit = offset & 0x3F;
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if (slot >= lbss.signal_red_bits.size()) lbss.signal_red_bits.resize(slot + 1);
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SB(lbss.signal_red_bits[slot], bit, 1, (uint64) ((state == SIGNAL_STATE_RED) ? 1 : 0));
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_m[t].m2 |= 0x8000;
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}
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void SetAllBridgeEntranceSimulatedSignalsGreenExtended(TileIndex t)
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{
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auto it = _long_bridge_signal_sim_map.find(t);
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if (it != _long_bridge_signal_sim_map.end()) {
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LongBridgeSignalStorage &lbss = it->second;
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for (auto &it : lbss.signal_red_bits) {
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it = 0;
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}
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_m[t].m2 = 0x8000;
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} else {
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_m[t].m2 = 0;
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}
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}
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void ClearBridgeEntranceSimulatedSignalsExtended(TileIndex t)
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{
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_long_bridge_signal_sim_map.erase(t);
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_m[t].m2 = 0;
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}
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void ClearBridgeSimulatedSignalMapping()
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{
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_long_bridge_signal_sim_map.clear();
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}
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