cpp/openttd-patchpack/source Files · src/road_map.cpp

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Location: cpp/openttd-patchpack/source/src/road_map.cpp

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rubidium

(svn r11011) -Fix [FS#1129]: GetFirstVehicleInChain did change the game state while being marked const.
-Codechange: do not brute force determine the first vehicle in the chain or previous vehicle, but do it by properly accounting the previous and first pointers when updating the next pointer. This gives a performance increase of about 15% when there are a lot of vehicles in the game.

/* $Id$ */

/** @file road_map.cpp */

#include "stdafx.h"
#include "openttd.h"
#include "bridge_map.h"
#include "functions.h"
#include "landscape.h"
#include "road_map.h"
#include "station.h"
#include "tunnel_map.h"
#include "station_map.h"
#include "depot.h"


RoadBits GetAnyRoadBits(TileIndex tile, RoadType rt)
{
	if (!HASBIT(GetRoadTypes(tile), rt)) return ROAD_NONE;

	switch (GetTileType(tile)) {
		case MP_ROAD:
			switch (GetRoadTileType(tile)) {
				default:
				case ROAD_TILE_NORMAL:   return GetRoadBits(tile, rt);
				case ROAD_TILE_CROSSING: return GetCrossingRoadBits(tile);
				case ROAD_TILE_DEPOT:    return DiagDirToRoadBits(GetRoadDepotDirection(tile));
			}

		case MP_STATION:
			if (!IsRoadStopTile(tile)) return ROAD_NONE;
			if (IsDriveThroughStopTile(tile)) return (GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y;
			return DiagDirToRoadBits(GetRoadStopDir(tile));

		case MP_TUNNELBRIDGE:
			if (IsTunnel(tile)) {
				if (GetTunnelTransportType(tile) != TRANSPORT_ROAD) return ROAD_NONE;
				return DiagDirToRoadBits(ReverseDiagDir(GetTunnelDirection(tile)));
			} else {
				if (GetBridgeTransportType(tile) != TRANSPORT_ROAD) return ROAD_NONE;
				return DiagDirToRoadBits(ReverseDiagDir(GetBridgeRampDirection(tile)));
			}

		default: return ROAD_NONE;
	}
}


TrackBits GetAnyRoadTrackBits(TileIndex tile, RoadType rt)
{
	uint32 r;

	/* Don't allow local authorities to build roads through road depots or road stops. */
	if ((IsTileType(tile, MP_ROAD) && IsTileDepotType(tile, TRANSPORT_ROAD)) || (IsTileType(tile, MP_STATION) && !IsDriveThroughStopTile(tile)) || !HASBIT(GetRoadTypes(tile), rt)) {
		return TRACK_BIT_NONE;
	}

	r = GetTileTrackStatus(tile, TRANSPORT_ROAD, RoadTypeToRoadTypes(rt));

	return (TrackBits)(byte)(r | (r >> 8));
}