celestar@3355: /* $Id$ */
bjarni@6268: /** @file elrail.cpp
rubidium@4549:  * This file deals with displaying wires and pylons for electric railways.
rubidium@4549:  * <h2>Basics</h2>
rubidium@4549:  *
rubidium@4549:  * <h3>Tile Types</h3>
rubidium@4549:  *
rubidium@4549:  * We have two different types of tiles in the drawing code:
rubidium@4549:  * Normal Railway Tiles (NRTs) which can have more than one track on it, and
rubidium@4549:  * Special Railways tiles (SRTs) which have only one track (like crossings, depots
rubidium@4549:  * stations, etc).
rubidium@4549:  *
rubidium@4549:  * <h3>Location Categories</h3>
rubidium@4549:  *
rubidium@4549:  * All tiles are categorized into three location groups (TLG):
rubidium@4549:  * Group 0: Tiles with both an even X coordinate and an even Y coordinate
rubidium@4549:  * Group 1: Tiles with an even X and an odd Y coordinate
rubidium@4549:  * Group 2: Tiles with an odd X and an even Y coordinate
rubidium@4549:  * Group 3: Tiles with both an odd X and Y coordnate.
rubidium@4549:  *
rubidium@4549:  * <h3>Pylon Points</h3>
rubidium@4549:  * <h4>Control Points</h4>
rubidium@4549:  * A Pylon Control Point (PCP) is a position where a wire (or rather two)
rubidium@4549:  * is mounted onto a pylon.
rubidium@4549:  * Each NRT does contain 4 PCPs which are bitmapped to a byte
rubidium@4549:  * variable and are represented by the DiagDirection enum
rubidium@4549:  *
rubidium@4549:  * Each track ends on two PCPs and thus requires one pylon on each end. However,
rubidium@4549:  * there is one exception: Straight-and-level tracks only have one pylon every
rubidium@4549:  * other tile.
rubidium@4549:  *
rubidium@4549:  * Now on each edge there are two PCPs: One from each adjacent tile. Both PCPs
rubidium@4549:  * are merged using an OR operation (i. e. if one tile needs a PCP at the postion
rubidium@4549:  * in question, both tiles get it).
rubidium@4549:  *
rubidium@4549:  * <h4>Position Points</h4>
rubidium@4549:  * A Pylon Position Point (PPP) is a position where a pylon is located on the
rubidium@4549:  * ground.  Each PCP owns 8 in (45 degree steps) PPPs that are located around
rubidium@4549:  * it. PPPs are represented using the Direction enum. Each track bit has PPPs
rubidium@4549:  * that are impossible (because the pylon would be situated on the track) and
rubidium@4549:  * some that are preferred (because the pylon would be rectangular to the track).
rubidium@4549:  *
rubidium@4549:  * <img src="../../elrail_tile.png">
rubidium@4549:  * <img src="../../elrail_track.png">
rubidium@4549:  *
rubidium@4549:  */
celestar@3355: 
celestar@3355: #include "stdafx.h"
celestar@3355: #include "openttd.h"
tron@3367: #include "station_map.h"
celestar@3355: #include "tile.h"
celestar@3355: #include "viewport.h"
celestar@3355: #include "functions.h" /* We should REALLY get rid of this goddamn file, as it is butt-ugly */
celestar@3355: #include "variables.h" /* ... same here */
KUDr@6307: #include "landscape.h"
celestar@3355: #include "rail.h"
celestar@3355: #include "debug.h"
celestar@3355: #include "tunnel_map.h"
celestar@3355: #include "road_map.h"
celestar@3355: #include "bridge_map.h"
celestar@3355: #include "bridge.h"
celestar@3355: #include "rail_map.h"
celestar@3355: #include "table/sprites.h"
celestar@3355: #include "table/elrail_data.h"
KUDr@5116: #include "vehicle.h"
KUDr@5116: #include "train.h"
KUDr@5116: #include "gui.h"
celestar@3355: 
celestar@3355: static inline TLG GetTLG(TileIndex t)
celestar@3355: {
rubidium@5838: 	return (TLG)((HASBIT(TileX(t), 0) << 1) + HASBIT(TileY(t), 0));
celestar@3355: }
celestar@3355: 
celestar@3355: /** Finds which Rail Bits are present on a given tile. For bridge tiles,
rubidium@4549:  * returns track bits under the bridge
rubidium@4549:  */
celestar@3355: static TrackBits GetRailTrackBitsUniversal(TileIndex t, byte *override)
celestar@3355: {
celestar@3355: 	switch (GetTileType(t)) {
celestar@3355: 		case MP_RAILWAY:
rubidium@5838: 			if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
celestar@3355: 			switch (GetRailTileType(t)) {
rubidium@3792: 				case RAIL_TILE_NORMAL: case RAIL_TILE_SIGNALS:
celestar@3355: 					return GetTrackBits(t);
KUDr@6285: 				case RAIL_TILE_WAYPOINT:
KUDr@6285: 					return GetRailWaypointBits(t);
celestar@3355: 				default:
rubidium@5838: 					return TRACK_BIT_NONE;
celestar@3355: 			}
celestar@3355: 			break;
tron@4077: 
celestar@3355: 		case MP_TUNNELBRIDGE:
celestar@3355: 			if (IsTunnel(t)) {
rubidium@5838: 				if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
celestar@3355: 				if (override != NULL) *override = 1 << GetTunnelDirection(t);
tron@4158: 				return AxisToTrackBits(DiagDirToAxis(GetTunnelDirection(t)));
celestar@3355: 			} else {
rubidium@5838: 				if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
celestar@5573: 				if (override != NULL && DistanceMax(t, GetOtherBridgeEnd(t)) > 1) {
celestar@5573: 					*override = 1 << GetBridgeRampDirection(t);
celestar@3355: 				}
celestar@5573: 				return AxisToTrackBits(DiagDirToAxis(GetBridgeRampDirection(t)));
celestar@3355: 			}
tron@4077: 
celestar@3355: 		case MP_STREET:
rubidium@5838: 			if (GetRoadTileType(t) != ROAD_TILE_CROSSING) return TRACK_BIT_NONE;
KUDr@6285: 			if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
celestar@3355: 			return GetCrossingRailBits(t);
tron@4077: 
celestar@3355: 		case MP_STATION:
rubidium@5838: 			if (!IsRailwayStation(t)) return TRACK_BIT_NONE;
rubidium@5838: 			if (GetRailType(t) != RAILTYPE_ELECTRIC) return TRACK_BIT_NONE;
rubidium@5838: 			if (!IsStationTileElectrifiable(t)) return TRACK_BIT_NONE;
celestar@3375: 			return TrackToTrackBits(GetRailStationTrack(t));
tron@4077: 
celestar@3355: 		default:
rubidium@5838: 			return TRACK_BIT_NONE;
celestar@3355: 	}
celestar@3355: }
celestar@3355: 
celestar@3451: /** Corrects the tileh for certain tile types. Returns an effective tileh for the track on the tile.
rubidium@4549:  * @param tile The tile to analyse
rubidium@4549:  * @param *tileh the tileh
rubidium@4549:  */
belugas@4171: static void AdjustTileh(TileIndex tile, Slope *tileh)
celestar@3451: {
tron@4077: 	if (IsTileType(tile, MP_TUNNELBRIDGE)) {
tron@4077: 		if (IsTunnel(tile)) {
bjarni@6298: 			*tileh = SLOPE_STEEP; // XXX - Hack to make tunnel entrances to always have a pylon
bjarni@6298: 		} else if (*tileh != SLOPE_FLAT) {
tron@3636: 			*tileh = SLOPE_FLAT;
celestar@3451: 		} else {
bjarni@6298: 			switch (GetBridgeRampDirection(tile)) {
bjarni@6298: 				case DIAGDIR_NE: *tileh = SLOPE_NE; break;
bjarni@6298: 				case DIAGDIR_SE: *tileh = SLOPE_SE; break;
bjarni@6298: 				case DIAGDIR_SW: *tileh = SLOPE_SW; break;
bjarni@6298: 				case DIAGDIR_NW: *tileh = SLOPE_NW; break;
bjarni@6298: 				default: NOT_REACHED();
celestar@3451: 			}
celestar@3451: 		}
celestar@3451: 	}
celestar@3451: }
celestar@3451: 
celestar@3355: /** Draws wires and, if required, pylons on a given tile
rubidium@4549:  * @param ti The Tileinfo to draw the tile for
rubidium@4549:  */
celestar@3355: static void DrawCatenaryRailway(const TileInfo *ti)
celestar@3355: {
celestar@3355: 	/* Pylons are placed on a tile edge, so we need to take into account
rubidium@4549: 	 * the track configuration of 2 adjacent tiles. trackconfig[0] stores the
rubidium@4549: 	 * current tile (home tile) while [1] holds the neighbour */
celestar@3355: 	TrackBits trackconfig[TS_END];
celestar@3355: 	bool isflat[TS_END];
celestar@3355: 	/* Note that ti->tileh has already been adjusted for Foundations */
tron@3636: 	Slope tileh[TS_END] = { ti->tileh, SLOPE_FLAT };
celestar@3355: 
celestar@3355: 	TLG tlg = GetTLG(ti->tile);
celestar@3355: 	byte PCPstatus = 0;
celestar@3355: 	byte OverridePCP = 0;
orudge@3395: 	byte PPPpreferred[DIAGDIR_END];
orudge@3395: 	byte PPPallowed[DIAGDIR_END];
celestar@3355: 	DiagDirection i;
celestar@3355: 	Track t;
celestar@3355: 
celestar@3355: 	/* Find which rail bits are present, and select the override points.
rubidium@4549: 	 * We don't draw a pylon:
rubidium@4549: 	 * 1) INSIDE a tunnel (we wouldn't see it anyway)
rubidium@4549: 	 * 2) on the "far" end of a bridge head (the one that connects to bridge middle),
rubidium@4549: 	 *    because that one is drawn on the bridge. Exception is for length 0 bridges
rubidium@4549: 	 *    which have no middle tiles */
celestar@3355: 	trackconfig[TS_HOME] = GetRailTrackBitsUniversal(ti->tile, &OverridePCP);
celestar@3355: 	/* If a track bit is present that is not in the main direction, the track is level */
rubidium@5838: 	isflat[TS_HOME] = ((trackconfig[TS_HOME] & (TRACK_BIT_HORZ | TRACK_BIT_VERT)) != 0);
celestar@3355: 
celestar@3451: 	AdjustTileh(ti->tile, &tileh[TS_HOME]);
celestar@3355: 
celestar@3355: 	for (i = DIAGDIR_NE; i < DIAGDIR_END; i++) {
Darkvater@4559: 		TileIndex neighbour = ti->tile + TileOffsByDiagDir(i);
celestar@3355: 		uint foundation = 0;
celestar@3355: 		int k;
celestar@3355: 
celestar@3355: 		/* Here's one of the main headaches. GetTileSlope does not correct for possibly
rubidium@4549: 		 * existing foundataions, so we do have to do that manually later on.*/
celestar@3355: 		tileh[TS_NEIGHBOUR] = GetTileSlope(neighbour, NULL);
celestar@3355: 		trackconfig[TS_NEIGHBOUR] = GetRailTrackBitsUniversal(neighbour, NULL);
rubidium@5838: 		if (IsTunnelTile(neighbour) && i != GetTunnelDirection(neighbour)) trackconfig[TS_NEIGHBOUR] = TRACK_BIT_NONE;
rubidium@5838: 		isflat[TS_NEIGHBOUR] = ((trackconfig[TS_NEIGHBOUR] & (TRACK_BIT_HORZ | TRACK_BIT_VERT)) != 0);
celestar@3355: 
bjarni@6298: 		PPPpreferred[i] = 0xFF; // We start with preferring everything (end-of-line in any direction)
celestar@3451: 		PPPallowed[i] = AllowedPPPonPCP[i];
celestar@3451: 
celestar@3355: 		/* We cycle through all the existing tracks at a PCP and see what
rubidium@4549: 		 * PPPs we want to have, or may not have at all */
celestar@3451: 		for (k = 0; k < NUM_TRACKS_AT_PCP; k++) {
celestar@3355: 			/* Next to us, we have a bridge head, don't worry about that one, if it shows away from us */
celestar@3451: 			if (TrackSourceTile[i][k] == TS_NEIGHBOUR &&
celestar@5573: 			    IsBridgeTile(neighbour) &&
tron@4000: 			    GetBridgeRampDirection(neighbour) == ReverseDiagDir(i)) {
tron@4000: 				continue;
tron@4000: 			}
celestar@3355: 
celestar@3451: 			/* We check whether the track in question (k) is present in the tile
rubidium@4549: 			 * (TrackSourceTile) */
celestar@3451: 			if (HASBIT(trackconfig[TrackSourceTile[i][k]], TracksAtPCP[i][k])) {
celestar@3451: 				/* track found, if track is in the neighbour tile, adjust the number
rubidium@4549: 				 * of the PCP for preferred/allowed determination*/
celestar@3451: 				DiagDirection PCPpos = (TrackSourceTile[i][k] == TS_HOME) ? i : ReverseDiagDir(i);
bjarni@6298: 				SETBIT(PCPstatus, i); // This PCP is in use
celestar@3451: 
celestar@3451: 				PPPpreferred[i] &= PreferredPPPofTrackAtPCP[TracksAtPCP[i][k]][PCPpos];
celestar@3451: 				PPPallowed[i] &= ~DisallowedPPPofTrackAtPCP[TracksAtPCP[i][k]][PCPpos];
celestar@3355: 			}
celestar@3355: 		}
celestar@3355: 
celestar@3355: 		/* Deactivate all PPPs if PCP is not used */
celestar@3355: 		PPPpreferred[i] *= HASBIT(PCPstatus, i);
celestar@3355: 		PPPallowed[i] *= HASBIT(PCPstatus, i);
celestar@3355: 
celestar@3880: 		/* A station is always "flat", so adjust the tileh accordingly */
celestar@3880: 		if (IsTileType(neighbour, MP_STATION)) tileh[TS_NEIGHBOUR] = SLOPE_FLAT;
celestar@3355: 
celestar@3355: 		/* Read the foundataions if they are present, and adjust the tileh */
glx@4448: 		if (IsTileType(neighbour, MP_RAILWAY) && GetRailType(neighbour) == RAILTYPE_ELECTRIC) foundation = GetRailFoundation(tileh[TS_NEIGHBOUR], trackconfig[TS_NEIGHBOUR]);
celestar@5573: 		if (IsBridgeTile(neighbour)) {
celestar@3368: 			foundation = GetBridgeFoundation(tileh[TS_NEIGHBOUR], DiagDirToAxis(GetBridgeRampDirection(neighbour)));
celestar@3368: 		}
celestar@3368: 
celestar@3355: 		if (foundation != 0) {
bjarni@6298: 			tileh[TS_NEIGHBOUR] = foundation < 15 ? SLOPE_FLAT : _inclined_tileh[foundation - 15];
celestar@3355: 		}
celestar@3355: 
celestar@3451: 		AdjustTileh(neighbour, &tileh[TS_NEIGHBOUR]);
celestar@3355: 
celestar@3355: 		/* If we have a straight (and level) track, we want a pylon only every 2 tiles
rubidium@4549: 		 * Delete the PCP if this is the case. */
celestar@3355: 		/* Level means that the slope is the same, or the track is flat */
celestar@3355: 		if (tileh[TS_HOME] == tileh[TS_NEIGHBOUR] || (isflat[TS_HOME] && isflat[TS_NEIGHBOUR])) {
celestar@3355: 			for (k = 0; k < NUM_IGNORE_GROUPS; k++)
celestar@3451: 				if (PPPpreferred[i] == IgnoredPCP[k][tlg][i]) CLRBIT(PCPstatus, i);
celestar@3355: 		}
celestar@3355: 
celestar@3451: 		/* Now decide where we draw our pylons. First try the preferred PPPs, but they may not exist.
rubidium@4549: 		 * In that case, we try the any of the allowed ones. if they don't exist either, don't draw
rubidium@4549: 		 * anything. Note that the preferred PPPs still contain the end-of-line markers.
rubidium@4549: 		 * Remove those (simply by ANDing with allowed, since these markers are never allowed) */
tron@4077: 		if ((PPPallowed[i] & PPPpreferred[i]) != 0) PPPallowed[i] &= PPPpreferred[i];
celestar@3355: 
celestar@5573: 		if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile)) {
celestar@5573: 			Track bridgetrack = GetBridgeAxis(ti->tile) == AXIS_X ? TRACK_X : TRACK_Y;
celestar@5573: 			uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
celestar@5573: 
celestar@5573: 			if ((height <= TilePixelHeight(ti->tile) + TILE_HEIGHT) &&
bjarni@6298: 					(i == PCPpositions[bridgetrack][0] || i == PCPpositions[bridgetrack][1])) {
bjarni@6298: 				SETBIT(OverridePCP, i);
bjarni@6298: 			}
celestar@5573: 		}
celestar@5573: 
celestar@3451: 		if (PPPallowed[i] != 0 && HASBIT(PCPstatus, i) && !HASBIT(OverridePCP, i)) {
celestar@3355: 			for (k = 0; k < DIR_END; k++) {
celestar@3355: 				byte temp = PPPorder[i][GetTLG(ti->tile)][k];
tron@4077: 
celestar@3451: 				if (HASBIT(PPPallowed[i], temp)) {
celestar@3355: 					uint x  = ti->x + x_pcp_offsets[i] + x_ppp_offsets[temp];
celestar@3355: 					uint y  = ti->y + y_pcp_offsets[i] + y_ppp_offsets[temp];
celestar@3355: 
celestar@3355: 					/* Don't build the pylon if it would be outside the tile */
celestar@3355: 					if (!HASBIT(OwnedPPPonPCP[i], temp)) {
celestar@3355: 						/* We have a neighour that will draw it, bail out */
celestar@3355: 						if (trackconfig[TS_NEIGHBOUR] != 0) break;
celestar@3355: 						continue; /* No neighbour, go looking for a better position */
celestar@3355: 					}
celestar@3355: 
KUDr@6307: 					SpriteID img = pylons_normal[temp];
KUDr@6307: 					SpriteID pal = PAL_NONE;
KUDr@6307: 					if (HASBIT(_transparent_opt, TO_BUILDINGS)) {
KUDr@6307: 						SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 						pal = PALETTE_TO_TRANSPARENT;
KUDr@6307: 					}
KUDr@6307: 
KUDr@6307: 					AddSortableSpriteToDraw(img, pal, x, y, 1, 1, 10,
celestar@3355: 							GetSlopeZ(ti->x + x_pcp_offsets[i], ti->y + y_pcp_offsets[i]));
celestar@3355: 					break; /* We already have drawn a pylon, bail out */
celestar@3355: 				}
celestar@3355: 			}
celestar@3355: 		}
celestar@3355: 	}
celestar@3355: 
tron@4480: 	/* Don't draw a wire under a low bridge */
KUDr@6307: 	if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !HASBIT(_transparent_opt, TO_BUILDINGS)) {
celestar@5573: 		uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile));
celestar@5573: 
celestar@5573: 		if (height <= TilePixelHeight(ti->tile) + TILE_HEIGHT) return;
tron@4480: 	}
tron@4480: 
celestar@3355: 	/* Drawing of pylons is finished, now draw the wires */
rubidium@5838: 	for (t = TRACK_BEGIN; t < TRACK_END; t++) {
celestar@3355: 		if (HASBIT(trackconfig[TS_HOME], t)) {
bjarni@6298: 			if (IsTunnelTile(ti->tile)) {
bjarni@6298: 				const SortableSpriteStruct *sss = &CatenarySpriteData_Tunnel[GetTunnelDirection(ti->tile)];
celestar@3355: 
bjarni@6298: 				AddSortableSpriteToDraw(
bjarni@6298: 					sss->image, PAL_NONE, ti->x + sss->x_offset, ti->y + sss->y_offset,
bjarni@6298: 					sss->x_size, sss->y_size, sss->z_size,
bjarni@6298: 					GetTileZ(ti->tile) + sss->z_offset
bjarni@6298: 				);
bjarni@6298: 				break;
bjarni@6298: 			}
celestar@3355: 			byte PCPconfig = HASBIT(PCPstatus, PCPpositions[t][0]) +
celestar@3355: 				(HASBIT(PCPstatus, PCPpositions[t][1]) << 1);
celestar@3355: 
celestar@3355: 			const SortableSpriteStruct *sss;
celestar@3355: 			int tileh_selector = !(tileh[TS_HOME] % 3) * tileh[TS_HOME] / 3; /* tileh for the slopes, 0 otherwise */
celestar@3355: 
celestar@3355: 			assert(PCPconfig != 0); /* We have a pylon on neither end of the wire, that doesn't work (since we have no sprites for that) */
tron@3636: 			assert(!IsSteepSlope(tileh[TS_HOME]));
celestar@3355: 			sss = &CatenarySpriteData[Wires[tileh_selector][t][PCPconfig]];
celestar@3355: 
KUDr@6307: 			SpriteID img = sss->image;
KUDr@6307: 			SpriteID pal = PAL_NONE;
KUDr@6307: 			if (HASBIT(_transparent_opt, TO_BUILDINGS)) {
KUDr@6307: 				SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 				pal = PALETTE_TO_TRANSPARENT;
KUDr@6307: 			}
KUDr@6307: 
KUDr@6307: 			AddSortableSpriteToDraw(img, pal, ti->x + sss->x_offset, ti->y + sss->y_offset,
tron@3645: 				sss->x_size, sss->y_size, sss->z_size, GetSlopeZ(ti->x + min(sss->x_offset, TILE_SIZE - 1), ti->y + min(sss->y_offset, TILE_SIZE - 1)) + sss->z_offset);
celestar@3355: 		}
celestar@3355: 	}
celestar@3355: }
celestar@3355: 
celestar@3355: static void DrawCatenaryOnBridge(const TileInfo *ti)
celestar@3355: {
celestar@3445: 	TileIndex end = GetSouthernBridgeEnd(ti->tile);
celestar@3445: 	TileIndex start = GetOtherBridgeEnd(end);
celestar@3445: 
celestar@3445: 	uint length = GetBridgeLength(start, end);
celestar@3355: 	uint num = DistanceMax(ti->tile, start);
tron@4159: 	uint height;
celestar@3445: 
celestar@3355: 	const SortableSpriteStruct *sss;
celestar@3355: 	Axis axis = GetBridgeAxis(ti->tile);
celestar@3355: 	TLG tlg = GetTLG(ti->tile);
celestar@3355: 
rubidium@5838: 	CatenarySprite offset = (CatenarySprite)(axis == AXIS_X ? 0 : WIRE_Y_FLAT_BOTH - WIRE_X_FLAT_BOTH);
celestar@3355: 
celestar@3355: 	if ((length % 2) && num == length) {
celestar@3445: 		/* Draw the "short" wire on the southern end of the bridge
celestar@3445: 		 * only needed if the length of the bridge is odd */
celestar@3355: 		sss = &CatenarySpriteData[WIRE_X_FLAT_BOTH + offset];
celestar@3355: 	} else {
celestar@3445: 		/* Draw "long" wires on all other tiles of the bridge (one pylon every two tiles) */
celestar@3355: 		sss = &CatenarySpriteData[WIRE_X_FLAT_SW + (num % 2) + offset];
celestar@3355: 	}
celestar@3355: 
celestar@5573: 	height = GetBridgeHeight(end);
tron@4159: 
KUDr@6307: 	SpriteID img = sss->image;
KUDr@6307: 	SpriteID pal = PAL_NONE;
KUDr@6307: 	if (HASBIT(_transparent_opt, TO_BUILDINGS)) {
KUDr@6307: 		SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 		pal = PALETTE_TO_TRANSPARENT;
KUDr@6307: 	}
KUDr@6307: 
KUDr@6307: 	AddSortableSpriteToDraw(img, pal, ti->x + sss->x_offset, ti->y + sss->y_offset,
tron@4159: 		sss->x_size, sss->y_size, sss->z_size, height + sss->z_offset
tron@4159: 	);
celestar@3445: 
celestar@3445: 	/* Finished with wires, draw pylons */
celestar@3445: 	/* every other tile needs a pylon on the northern end */
celestar@3355: 	if (num % 2) {
celestar@3355: 		if (axis == AXIS_X) {
KUDr@6307: 			img = pylons_bridge[0 + HASBIT(tlg, 0)];
KUDr@6307: 			if (HASBIT(_transparent_opt, TO_BUILDINGS)) SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 			AddSortableSpriteToDraw(img, pal, ti->x, ti->y + 4 + 8 * HASBIT(tlg, 0), 1, 1, 10, height);
celestar@3355: 		} else {
KUDr@6307: 			img = pylons_bridge[2 + HASBIT(tlg, 1)];
KUDr@6307: 			if (HASBIT(_transparent_opt, TO_BUILDINGS)) SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 			AddSortableSpriteToDraw(img, pal, ti->x + 4 + 8 * HASBIT(tlg, 1), ti->y, 1, 1, 10, height);
celestar@3355: 		}
celestar@3355: 	}
celestar@3355: 
celestar@3445: 	/* need a pylon on the southern end of the bridge */
celestar@3445: 	if (DistanceMax(ti->tile, start) == length) {
celestar@3355: 		if (axis == AXIS_X) {
KUDr@6307: 			img = pylons_bridge[0 + HASBIT(tlg, 0)];
KUDr@6307: 			if (HASBIT(_transparent_opt, TO_BUILDINGS)) SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 			AddSortableSpriteToDraw(img, pal, ti->x + 16, ti->y + 4 + 8 * HASBIT(tlg, 0), 1, 1, 10, height);
celestar@3355: 		} else {
KUDr@6307: 			img = pylons_bridge[2 + HASBIT(tlg, 1)];
KUDr@6307: 			if (HASBIT(_transparent_opt, TO_BUILDINGS)) SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 			AddSortableSpriteToDraw(img, pal, ti->x + 4 + 8 * HASBIT(tlg, 1), ti->y + 16, 1, 1, 10, height);
celestar@3355: 		}
celestar@3355: 	}
celestar@3355: }
celestar@3355: 
celestar@3355: void DrawCatenary(const TileInfo *ti)
celestar@3355: {
celestar@5573: 	if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile)) {
celestar@5573: 		TileIndex head = GetNorthernBridgeEnd(ti->tile);
celestar@5573: 
celestar@5573: 		if (GetBridgeTransportType(head) == TRANSPORT_RAIL && GetRailType(head) == RAILTYPE_ELECTRIC) {
celestar@5573: 			DrawCatenaryOnBridge(ti);
celestar@5573: 		}
celestar@5573: 	}
KUDr@5116: 	if (_patches.disable_elrails) return;
KUDr@5116: 
celestar@3355: 	switch (GetTileType(ti->tile)) {
celestar@3355: 		case MP_RAILWAY:
tron@4182: 			if (IsRailDepot(ti->tile)) {
bjarni@6298: 				const SortableSpriteStruct *sss = &CatenarySpriteData_Depot[GetRailDepotDirection(ti->tile)];
tron@4470: 
KUDr@6307: 				SpriteID img = sss->image;
KUDr@6307: 				SpriteID pal = PAL_NONE;
KUDr@6307: 				if (HASBIT(_transparent_opt, TO_BUILDINGS)) {
KUDr@6307: 					SETBIT(img, PALETTE_MODIFIER_TRANSPARENT);
KUDr@6307: 					pal = PALETTE_TO_TRANSPARENT;
KUDr@6307: 				}
KUDr@6307: 
tron@4470: 				AddSortableSpriteToDraw(
KUDr@6307: 					img, pal, ti->x + sss->x_offset, ti->y + sss->y_offset,
tron@4470: 					sss->x_size, sss->y_size, sss->z_size,
tron@4470: 					GetTileMaxZ(ti->tile) + sss->z_offset
tron@4470: 				);
celestar@3355: 				return;
celestar@3355: 			}
tron@3995: 			break;
tron@3995: 
celestar@3355: 		case MP_TUNNELBRIDGE:
celestar@5573: 		case MP_STREET:
celestar@5573: 		case MP_STATION:
celestar@3355: 			break;
tron@3995: 
tron@3995: 		default: return;
celestar@3355: 	}
tron@3995: 	DrawCatenaryRailway(ti);
celestar@3355: }
KUDr@5116: 
KUDr@5116: int32 SettingsDisableElrail(int32 p1)
KUDr@5116: {
KUDr@5116: 	EngineID e_id;
bjarni@6298: 	Vehicle *v;
KUDr@5116: 	Player *p;
KUDr@5116: 	bool disable = (p1 != 0);
KUDr@5116: 
KUDr@5116: 	/* we will now walk through all electric train engines and change their railtypes if it is the wrong one*/
KUDr@5116: 	const RailType old_railtype = disable ? RAILTYPE_ELECTRIC : RAILTYPE_RAIL;
KUDr@5116: 	const RailType new_railtype = disable ? RAILTYPE_RAIL : RAILTYPE_ELECTRIC;
KUDr@5116: 
KUDr@5116: 	/* walk through all train engines */
Darkvater@5314: 	for (e_id = 0; e_id < NUM_TRAIN_ENGINES; e_id++) {
tron@6074: 		RailVehicleInfo *rv_info = &_rail_vehicle_info[e_id];
KUDr@5116: 		/* if it is an electric rail engine and its railtype is the wrong one */
tron@6074: 		if (rv_info->engclass == 2 && rv_info->railtype == old_railtype) {
KUDr@5116: 			/* change it to the proper one */
tron@6074: 			rv_info->railtype = new_railtype;
KUDr@5116: 		}
KUDr@5116: 	}
KUDr@5116: 
KUDr@5116: 	/* when disabling elrails, make sure that all existing trains can run on
KUDr@5116: 	*  normal rail too */
KUDr@5116: 	if (disable) {
KUDr@5116: 		FOR_ALL_VEHICLES(v) {
bjarni@6298: 			if (v->type == VEH_TRAIN && v->u.rail.railtype == RAILTYPE_ELECTRIC) {
KUDr@5116: 				/* this railroad vehicle is now compatible only with elrail,
KUDr@5116: 				*  so add there also normal rail compatibility */
KUDr@5116: 				v->u.rail.compatible_railtypes |= (1 << RAILTYPE_RAIL);
KUDr@5116: 				v->u.rail.railtype = RAILTYPE_RAIL;
KUDr@5116: 				SETBIT(v->u.rail.flags, VRF_EL_ENGINE_ALLOWED_NORMAL_RAIL);
KUDr@5116: 			}
KUDr@5116: 		}
KUDr@5116: 	}
KUDr@5116: 
KUDr@5116: 	/* setup total power for trains */
KUDr@5116: 	FOR_ALL_VEHICLES(v) {
KUDr@5116: 		/* power is cached only for front engines */
bjarni@6298: 		if (v->type == VEH_TRAIN && IsFrontEngine(v)) TrainPowerChanged(v);
KUDr@5116: 	}
KUDr@5116: 
KUDr@5116: 	FOR_ALL_PLAYERS(p) p->avail_railtypes = GetPlayerRailtypes(p->index);
KUDr@5116: 
KUDr@5116: 	/* This resets the _last_built_railtype, which will be invalid for electric
KUDr@5116: 	* rails. It may have unintended consequences if that function is ever
KUDr@5116: 	* extended, though. */
KUDr@5116: 	ReinitGuiAfterToggleElrail(disable);
KUDr@5116: 	return 0;
KUDr@5116: }