diff --git a/src/elrail.c b/src/elrail.c deleted file mode 100644 --- a/src/elrail.c +++ /dev/null @@ -1,445 +0,0 @@ -/* $Id$ */ -/** @file elrail.c - * This file deals with displaying wires and pylons for electric railways. - *

Basics

- * - *

Tile Types

- * - * We have two different types of tiles in the drawing code: - * Normal Railway Tiles (NRTs) which can have more than one track on it, and - * Special Railways tiles (SRTs) which have only one track (like crossings, depots - * stations, etc). - * - *

Location Categories

- * - * All tiles are categorized into three location groups (TLG): - * Group 0: Tiles with both an even X coordinate and an even Y coordinate - * Group 1: Tiles with an even X and an odd Y coordinate - * Group 2: Tiles with an odd X and an even Y coordinate - * Group 3: Tiles with both an odd X and Y coordnate. - * - *

Pylon Points

- *

Control Points

- * A Pylon Control Point (PCP) is a position where a wire (or rather two) - * is mounted onto a pylon. - * Each NRT does contain 4 PCPs which are bitmapped to a byte - * variable and are represented by the DiagDirection enum - * - * Each track ends on two PCPs and thus requires one pylon on each end. However, - * there is one exception: Straight-and-level tracks only have one pylon every - * other tile. - * - * Now on each edge there are two PCPs: One from each adjacent tile. Both PCPs - * are merged using an OR operation (i. e. if one tile needs a PCP at the postion - * in question, both tiles get it). - * - *

Position Points

- * A Pylon Position Point (PPP) is a position where a pylon is located on the - * ground. Each PCP owns 8 in (45 degree steps) PPPs that are located around - * it. PPPs are represented using the Direction enum. Each track bit has PPPs - * that are impossible (because the pylon would be situated on the track) and - * some that are preferred (because the pylon would be rectangular to the track). - * - * - * - * - */ - -#include "stdafx.h" -#include "openttd.h" -#include "station_map.h" -#include "tile.h" -#include "viewport.h" -#include "functions.h" /* We should REALLY get rid of this goddamn file, as it is butt-ugly */ -#include "variables.h" /* ... same here */ -#include "rail.h" -#include "debug.h" -#include "tunnel_map.h" -#include "road_map.h" -#include "bridge_map.h" -#include "bridge.h" -#include "rail_map.h" -#include "table/sprites.h" -#include "table/elrail_data.h" -#include "vehicle.h" -#include "train.h" -#include "gui.h" - -static inline TLG GetTLG(TileIndex t) -{ - return (HASBIT(TileX(t), 0) << 1) + HASBIT(TileY(t), 0); -} - -/** Finds which Rail Bits are present on a given tile. For bridge tiles, - * returns track bits under the bridge - */ -static TrackBits GetRailTrackBitsUniversal(TileIndex t, byte *override) -{ - switch (GetTileType(t)) { - case MP_RAILWAY: - if (GetRailType(t) != RAILTYPE_ELECTRIC) return 0; - switch (GetRailTileType(t)) { - case RAIL_TILE_NORMAL: case RAIL_TILE_SIGNALS: - return GetTrackBits(t); - case RAIL_TILE_DEPOT_WAYPOINT: - if (GetRailTileSubtype(t) == RAIL_SUBTYPE_WAYPOINT) return GetRailWaypointBits(t); - default: - return 0; - } - break; - - case MP_TUNNELBRIDGE: - if (IsTunnel(t)) { - if (GetRailType(t) != RAILTYPE_ELECTRIC) return 0; - if (override != NULL) *override = 1 << GetTunnelDirection(t); - return AxisToTrackBits(DiagDirToAxis(GetTunnelDirection(t))); - } else { - if (GetRailType(t) != RAILTYPE_ELECTRIC) return 0; - if (override != NULL && DistanceMax(t, GetOtherBridgeEnd(t)) > 1) { - *override = 1 << GetBridgeRampDirection(t); - } - return AxisToTrackBits(DiagDirToAxis(GetBridgeRampDirection(t))); - } - - case MP_STREET: - if (GetRoadTileType(t) != ROAD_TILE_CROSSING) return 0; - if (GetRailTypeCrossing(t) != RAILTYPE_ELECTRIC) return 0; - return GetCrossingRailBits(t); - - case MP_STATION: - if (!IsRailwayStation(t)) return 0; - if (GetRailType(t) != RAILTYPE_ELECTRIC) return 0; - if (!IsStationTileElectrifiable(t)) return 0; - return TrackToTrackBits(GetRailStationTrack(t)); - - default: - return 0; - } -} - -/** Corrects the tileh for certain tile types. Returns an effective tileh for the track on the tile. - * @param tile The tile to analyse - * @param *tileh the tileh - */ -static void AdjustTileh(TileIndex tile, Slope *tileh) -{ - if (IsTileType(tile, MP_TUNNELBRIDGE)) { - if (IsTunnel(tile)) { - *tileh = SLOPE_FLAT; - } else { - if (*tileh != SLOPE_FLAT) { - *tileh = SLOPE_FLAT; - } else { - switch (GetBridgeRampDirection(tile)) { - case DIAGDIR_NE: *tileh = SLOPE_NE; break; - case DIAGDIR_SE: *tileh = SLOPE_SE; break; - case DIAGDIR_SW: *tileh = SLOPE_SW; break; - case DIAGDIR_NW: *tileh = SLOPE_NW; break; - default: NOT_REACHED(); - } - } - } - } -} - -/** Draws wires and, if required, pylons on a given tile - * @param ti The Tileinfo to draw the tile for - */ -static void DrawCatenaryRailway(const TileInfo *ti) -{ - /* Pylons are placed on a tile edge, so we need to take into account - * the track configuration of 2 adjacent tiles. trackconfig[0] stores the - * current tile (home tile) while [1] holds the neighbour */ - TrackBits trackconfig[TS_END]; - bool isflat[TS_END]; - /* Note that ti->tileh has already been adjusted for Foundations */ - Slope tileh[TS_END] = { ti->tileh, SLOPE_FLAT }; - - TLG tlg = GetTLG(ti->tile); - byte PCPstatus = 0; - byte OverridePCP = 0; - byte PPPpreferred[DIAGDIR_END]; - byte PPPallowed[DIAGDIR_END]; - DiagDirection i; - Track t; - - /* Find which rail bits are present, and select the override points. - * We don't draw a pylon: - * 1) INSIDE a tunnel (we wouldn't see it anyway) - * 2) on the "far" end of a bridge head (the one that connects to bridge middle), - * because that one is drawn on the bridge. Exception is for length 0 bridges - * which have no middle tiles */ - trackconfig[TS_HOME] = GetRailTrackBitsUniversal(ti->tile, &OverridePCP); - /* If a track bit is present that is not in the main direction, the track is level */ - isflat[TS_HOME] = trackconfig[TS_HOME] & (TRACK_BIT_HORZ | TRACK_BIT_VERT); - - AdjustTileh(ti->tile, &tileh[TS_HOME]); - - for (i = DIAGDIR_NE; i < DIAGDIR_END; i++) { - TileIndex neighbour = ti->tile + TileOffsByDiagDir(i); - uint foundation = 0; - int k; - - /* Here's one of the main headaches. GetTileSlope does not correct for possibly - * existing foundataions, so we do have to do that manually later on.*/ - tileh[TS_NEIGHBOUR] = GetTileSlope(neighbour, NULL); - trackconfig[TS_NEIGHBOUR] = GetRailTrackBitsUniversal(neighbour, NULL); - if (IsTunnelTile(neighbour) && i != GetTunnelDirection(neighbour)) trackconfig[TS_NEIGHBOUR] = 0; - isflat[TS_NEIGHBOUR] = trackconfig[TS_NEIGHBOUR] & (TRACK_BIT_HORZ | TRACK_BIT_VERT); - - PPPpreferred[i] = 0xFF; /* We start with preferring everything (end-of-line in any direction) */ - PPPallowed[i] = AllowedPPPonPCP[i]; - - /* We cycle through all the existing tracks at a PCP and see what - * PPPs we want to have, or may not have at all */ - for (k = 0; k < NUM_TRACKS_AT_PCP; k++) { - /* Next to us, we have a bridge head, don't worry about that one, if it shows away from us */ - if (TrackSourceTile[i][k] == TS_NEIGHBOUR && - IsBridgeTile(neighbour) && - GetBridgeRampDirection(neighbour) == ReverseDiagDir(i)) { - continue; - } - - /* We check whether the track in question (k) is present in the tile - * (TrackSourceTile) */ - if (HASBIT(trackconfig[TrackSourceTile[i][k]], TracksAtPCP[i][k])) { - /* track found, if track is in the neighbour tile, adjust the number - * of the PCP for preferred/allowed determination*/ - DiagDirection PCPpos = (TrackSourceTile[i][k] == TS_HOME) ? i : ReverseDiagDir(i); - SETBIT(PCPstatus, i); /* This PCP is in use */ - - PPPpreferred[i] &= PreferredPPPofTrackAtPCP[TracksAtPCP[i][k]][PCPpos]; - PPPallowed[i] &= ~DisallowedPPPofTrackAtPCP[TracksAtPCP[i][k]][PCPpos]; - } - } - - /* Deactivate all PPPs if PCP is not used */ - PPPpreferred[i] *= HASBIT(PCPstatus, i); - PPPallowed[i] *= HASBIT(PCPstatus, i); - - /* A station is always "flat", so adjust the tileh accordingly */ - if (IsTileType(neighbour, MP_STATION)) tileh[TS_NEIGHBOUR] = SLOPE_FLAT; - - /* Read the foundataions if they are present, and adjust the tileh */ - if (IsTileType(neighbour, MP_RAILWAY) && GetRailType(neighbour) == RAILTYPE_ELECTRIC) foundation = GetRailFoundation(tileh[TS_NEIGHBOUR], trackconfig[TS_NEIGHBOUR]); - if (IsBridgeTile(neighbour)) { - foundation = GetBridgeFoundation(tileh[TS_NEIGHBOUR], DiagDirToAxis(GetBridgeRampDirection(neighbour))); - } - - if (foundation != 0) { - if (foundation < 15) { - tileh[TS_NEIGHBOUR] = SLOPE_FLAT; - } else { - tileh[TS_NEIGHBOUR] = _inclined_tileh[foundation - 15]; - } - } - - AdjustTileh(neighbour, &tileh[TS_NEIGHBOUR]); - - /* If we have a straight (and level) track, we want a pylon only every 2 tiles - * Delete the PCP if this is the case. */ - /* Level means that the slope is the same, or the track is flat */ - if (tileh[TS_HOME] == tileh[TS_NEIGHBOUR] || (isflat[TS_HOME] && isflat[TS_NEIGHBOUR])) { - for (k = 0; k < NUM_IGNORE_GROUPS; k++) - if (PPPpreferred[i] == IgnoredPCP[k][tlg][i]) CLRBIT(PCPstatus, i); - } - - /* Now decide where we draw our pylons. First try the preferred PPPs, but they may not exist. - * In that case, we try the any of the allowed ones. if they don't exist either, don't draw - * anything. Note that the preferred PPPs still contain the end-of-line markers. - * Remove those (simply by ANDing with allowed, since these markers are never allowed) */ - if ((PPPallowed[i] & PPPpreferred[i]) != 0) PPPallowed[i] &= PPPpreferred[i]; - - if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile)) { - Track bridgetrack = GetBridgeAxis(ti->tile) == AXIS_X ? TRACK_X : TRACK_Y; - uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile)); - - if ((height <= TilePixelHeight(ti->tile) + TILE_HEIGHT) && - (i == PCPpositions[bridgetrack][0] || i == PCPpositions[bridgetrack][1])) SETBIT(OverridePCP, i); - } - - if (PPPallowed[i] != 0 && HASBIT(PCPstatus, i) && !HASBIT(OverridePCP, i)) { - for (k = 0; k < DIR_END; k++) { - byte temp = PPPorder[i][GetTLG(ti->tile)][k]; - - if (HASBIT(PPPallowed[i], temp)) { - uint x = ti->x + x_pcp_offsets[i] + x_ppp_offsets[temp]; - uint y = ti->y + y_pcp_offsets[i] + y_ppp_offsets[temp]; - - /* Don't build the pylon if it would be outside the tile */ - if (!HASBIT(OwnedPPPonPCP[i], temp)) { - /* We have a neighour that will draw it, bail out */ - if (trackconfig[TS_NEIGHBOUR] != 0) break; - continue; /* No neighbour, go looking for a better position */ - } - - AddSortableSpriteToDraw(pylons_normal[temp], x, y, 1, 1, 10, - GetSlopeZ(ti->x + x_pcp_offsets[i], ti->y + y_pcp_offsets[i])); - break; /* We already have drawn a pylon, bail out */ - } - } - } - } - - /* Don't draw a wire under a low bridge */ - if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile) && !(_display_opt & DO_TRANS_BUILDINGS)) { - uint height = GetBridgeHeight(GetNorthernBridgeEnd(ti->tile)); - - if (height <= TilePixelHeight(ti->tile) + TILE_HEIGHT) return; - } - - /* Drawing of pylons is finished, now draw the wires */ - for (t = 0; t < TRACK_END; t++) { - if (HASBIT(trackconfig[TS_HOME], t)) { - - byte PCPconfig = HASBIT(PCPstatus, PCPpositions[t][0]) + - (HASBIT(PCPstatus, PCPpositions[t][1]) << 1); - - const SortableSpriteStruct *sss; - int tileh_selector = !(tileh[TS_HOME] % 3) * tileh[TS_HOME] / 3; /* tileh for the slopes, 0 otherwise */ - - assert(PCPconfig != 0); /* We have a pylon on neither end of the wire, that doesn't work (since we have no sprites for that) */ - assert(!IsSteepSlope(tileh[TS_HOME])); - sss = &CatenarySpriteData[Wires[tileh_selector][t][PCPconfig]]; - - AddSortableSpriteToDraw( sss->image, ti->x + sss->x_offset, ti->y + sss->y_offset, - 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); - } - } -} - -static void DrawCatenaryOnBridge(const TileInfo *ti) -{ - TileIndex end = GetSouthernBridgeEnd(ti->tile); - TileIndex start = GetOtherBridgeEnd(end); - - uint length = GetBridgeLength(start, end); - uint num = DistanceMax(ti->tile, start); - uint height; - - const SortableSpriteStruct *sss; - Axis axis = GetBridgeAxis(ti->tile); - TLG tlg = GetTLG(ti->tile); - - CatenarySprite offset = axis == AXIS_X ? 0 : WIRE_Y_FLAT_BOTH - WIRE_X_FLAT_BOTH; - - if ((length % 2) && num == length) { - /* Draw the "short" wire on the southern end of the bridge - * only needed if the length of the bridge is odd */ - sss = &CatenarySpriteData[WIRE_X_FLAT_BOTH + offset]; - } else { - /* Draw "long" wires on all other tiles of the bridge (one pylon every two tiles) */ - sss = &CatenarySpriteData[WIRE_X_FLAT_SW + (num % 2) + offset]; - } - - height = GetBridgeHeight(end); - - AddSortableSpriteToDraw( sss->image, ti->x + sss->x_offset, ti->y + sss->y_offset, - sss->x_size, sss->y_size, sss->z_size, height + sss->z_offset - ); - - /* Finished with wires, draw pylons */ - /* every other tile needs a pylon on the northern end */ - if (num % 2) { - if (axis == AXIS_X) { - AddSortableSpriteToDraw(pylons_bridge[0 + HASBIT(tlg, 0)], ti->x, ti->y + 4 + 8 * HASBIT(tlg, 0), 1, 1, 10, height); - } else { - AddSortableSpriteToDraw(pylons_bridge[2 + HASBIT(tlg, 1)], ti->x + 4 + 8 * HASBIT(tlg, 1), ti->y, 1, 1, 10, height); - } - } - - /* need a pylon on the southern end of the bridge */ - if (DistanceMax(ti->tile, start) == length) { - if (axis == AXIS_X) { - AddSortableSpriteToDraw(pylons_bridge[0 + HASBIT(tlg, 0)], ti->x + 16, ti->y + 4 + 8 * HASBIT(tlg, 0), 1, 1, 10, height); - } else { - AddSortableSpriteToDraw(pylons_bridge[2 + HASBIT(tlg, 1)], ti->x + 4 + 8 * HASBIT(tlg, 1), ti->y + 16, 1, 1, 10, height); - } - } -} - -void DrawCatenary(const TileInfo *ti) -{ - if (MayHaveBridgeAbove(ti->tile) && IsBridgeAbove(ti->tile)) { - TileIndex head = GetNorthernBridgeEnd(ti->tile); - - if (GetBridgeTransportType(head) == TRANSPORT_RAIL && GetRailType(head) == RAILTYPE_ELECTRIC) { - DrawCatenaryOnBridge(ti); - } - } - if (_patches.disable_elrails) return; - - switch (GetTileType(ti->tile)) { - case MP_RAILWAY: - if (IsRailDepot(ti->tile)) { - const SortableSpriteStruct* sss = &CatenarySpriteData_Depot[GetRailDepotDirection(ti->tile)]; - - AddSortableSpriteToDraw( - sss->image, ti->x + sss->x_offset, ti->y + sss->y_offset, - sss->x_size, sss->y_size, sss->z_size, - GetTileMaxZ(ti->tile) + sss->z_offset - ); - return; - } - break; - - case MP_TUNNELBRIDGE: - case MP_STREET: - case MP_STATION: - break; - - default: return; - } - DrawCatenaryRailway(ti); -} - -int32 SettingsDisableElrail(int32 p1) -{ - EngineID e_id; - Vehicle* v; - Player *p; - bool disable = (p1 != 0); - - /* we will now walk through all electric train engines and change their railtypes if it is the wrong one*/ - const RailType old_railtype = disable ? RAILTYPE_ELECTRIC : RAILTYPE_RAIL; - const RailType new_railtype = disable ? RAILTYPE_RAIL : RAILTYPE_ELECTRIC; - - /* walk through all train engines */ - for (e_id = 0; e_id < NUM_TRAIN_ENGINES; e_id++) { - const RailVehicleInfo *rv_info = RailVehInfo(e_id); - Engine *e = GetEngine(e_id); - /* if it is an electric rail engine and its railtype is the wrong one */ - if (rv_info->engclass == 2 && e->railtype == old_railtype) { - /* change it to the proper one */ - e->railtype = new_railtype; - } - } - - /* when disabling elrails, make sure that all existing trains can run on - * normal rail too */ - if (disable) { - FOR_ALL_VEHICLES(v) { - if (v->type == VEH_Train && v->u.rail.railtype == RAILTYPE_ELECTRIC) { - /* this railroad vehicle is now compatible only with elrail, - * so add there also normal rail compatibility */ - v->u.rail.compatible_railtypes |= (1 << RAILTYPE_RAIL); - v->u.rail.railtype = RAILTYPE_RAIL; - SETBIT(v->u.rail.flags, VRF_EL_ENGINE_ALLOWED_NORMAL_RAIL); - } - } - } - - /* setup total power for trains */ - FOR_ALL_VEHICLES(v) { - /* power is cached only for front engines */ - if (v->type == VEH_Train && IsFrontEngine(v)) TrainPowerChanged(v); - } - - FOR_ALL_PLAYERS(p) p->avail_railtypes = GetPlayerRailtypes(p->index); - - /* This resets the _last_built_railtype, which will be invalid for electric - * rails. It may have unintended consequences if that function is ever - * extended, though. */ - ReinitGuiAfterToggleElrail(disable); - return 0; -}