vehicles_affected;
if (rail) {
auto find_train_reservations = [&vehicles_affected](TileIndex tile) {
TrackBits reserved = GetBridgeReservationTrackBits(tile);
Track track;
while ((track = RemoveFirstTrack(&reserved)) != INVALID_TRACK) {
Train *v = GetTrainForReservation(tile, track);
if (v != nullptr) {
FreeTrainTrackReservation(v);
vehicles_affected.push_back(v);
}
}
};
find_train_reservations(tile);
find_train_reservations(endtile);
}
bool removetile = false;
bool removeendtile = false;
bool update_road = false;
/* Update company infrastructure counts. */
if (rail) {
SubtractRailTunnelBridgeInfrastructure(tile, endtile);
if (IsTunnelBridgeWithSignalSimulation(tile)) {
TraceRestrictNotifySignalRemoval(tile, FindFirstTrack(GetAcrossTunnelBridgeTrackBits(tile)));
TraceRestrictNotifySignalRemoval(endtile, FindFirstTrack(GetAcrossTunnelBridgeTrackBits(endtile)));
}
} else if (GetTunnelBridgeTransportType(tile) == TRANSPORT_ROAD) {
SubtractRoadTunnelBridgeInfrastructure(tile, endtile);
if (RoadLayoutChangeNotificationEnabled(false)) {
if (IsRoadCustomBridgeHead(tile) || IsRoadCustomBridgeHead(endtile)) {
NotifyRoadLayoutChanged();
} else {
if (HasRoadTypeRoad(tile)) NotifyRoadLayoutChangedIfSimpleTunnelBridgeNonLeaf(tile, endtile, direction, RTT_ROAD);
if (HasRoadTypeTram(tile)) NotifyRoadLayoutChangedIfSimpleTunnelBridgeNonLeaf(tile, endtile, direction, RTT_TRAM);
}
}
update_road = true;
} else { // Aqueduct
if (Company::IsValidID(owner)) Company::Get(owner)->infrastructure.water -= len * TUNNELBRIDGE_TRACKBIT_FACTOR;
removetile = IsDockingTile(tile);
removeendtile = IsDockingTile(endtile);
}
DirtyAllCompanyInfrastructureWindows();
if (IsTunnelBridgeSignalSimulationEntrance(tile)) {
ClearBridgeEntranceSimulatedSignals(tile);
SetBridgeSignalStyle(tile, 0);
}
if (IsTunnelBridgeSignalSimulationEntrance(endtile)) {
ClearBridgeEntranceSimulatedSignals(endtile);
SetBridgeSignalStyle(endtile, 0);
}
DoClearSquare(tile);
DoClearSquare(endtile);
if (removetile) RemoveDockingTile(tile);
if (removeendtile) RemoveDockingTile(endtile);
for (TileIndex c = tile + delta; c != endtile; c += delta) {
/* do not let trees appear from 'nowhere' after removing bridge */
if (IsNormalRoadTile(c) && GetRoadside(c) == ROADSIDE_TREES) {
int minz = GetTileMaxZ(c) + 3;
if (height < minz) SetRoadside(c, ROADSIDE_PAVED);
}
ClearBridgeMiddle(c);
MarkTileDirtyByTile(c, VMDF_NOT_MAP_MODE, height - TileHeight(c));
}
if (rail) {
/* cannot use INVALID_DIAGDIR for signal update because the bridge doesn't exist anymore */
auto notify_track_change = [owner](TileIndex tile, DiagDirection direction, TrackBits tracks) {
auto check_dir = [&](DiagDirection d) {
if (DiagdirReachesTracks(d) & tracks) AddSideToSignalBuffer(tile, d, owner);
};
check_dir(ChangeDiagDir(direction, DIAGDIRDIFF_90RIGHT));
check_dir(ChangeDiagDir(direction, DIAGDIRDIFF_REVERSE));
check_dir(ChangeDiagDir(direction, DIAGDIRDIFF_90LEFT));
while (tracks != TRACK_BIT_NONE) {
YapfNotifyTrackLayoutChange(tile, RemoveFirstTrack(&tracks));
}
};
notify_track_change(tile, direction, tile_tracks);
notify_track_change(endtile, ReverseDiagDir(direction), endtile_tracks);
for (uint i = 0; i < vehicles_affected.size(); ++i) {
TryPathReserve(vehicles_affected[i], true);
}
}
if (update_road) {
UpdateRoadCachedOneWayStatesAroundTile(tile);
UpdateRoadCachedOneWayStatesAroundTile(endtile);
}
}
return cost;
}
/**
* Remove a tunnel or a bridge from the game.
* @param tile Tile containing one of the endpoints.
* @param flags Command flags.
* @return Succeeded or failed command.
*/
static CommandCost ClearTile_TunnelBridge(TileIndex tile, DoCommandFlag flags)
{
if (IsTunnel(tile)) {
if (flags & DC_AUTO) return_cmd_error(STR_ERROR_MUST_DEMOLISH_TUNNEL_FIRST);
return DoClearTunnel(tile, flags);
} else { // IsBridge(tile)
if (flags & DC_AUTO) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
return DoClearBridge(tile, flags);
}
}
/**
* Draw a single pillar sprite.
* @param psid Pillarsprite
* @param x Pillar X
* @param y Pillar Y
* @param z Pillar Z
* @param w Bounding box size in X direction
* @param h Bounding box size in Y direction
* @param subsprite Optional subsprite for drawing halfpillars
*/
static inline void DrawPillar(const PalSpriteID *psid, int x, int y, int z, int w, int h, const SubSprite *subsprite)
{
static const int PILLAR_Z_OFFSET = TILE_HEIGHT - BRIDGE_Z_START; ///< Start offset of pillar wrt. bridge (downwards)
AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, w, h, BB_HEIGHT_UNDER_BRIDGE - PILLAR_Z_OFFSET, z, IsTransparencySet(TO_BRIDGES), 0, 0, -PILLAR_Z_OFFSET, subsprite);
}
/**
* Draw two bridge pillars (north and south).
* @param z_bottom Bottom Z
* @param z_top Top Z
* @param psid Pillarsprite
* @param x Pillar X
* @param y Pillar Y
* @param w Bounding box size in X direction
* @param h Bounding box size in Y direction
* @return Reached Z at the bottom
*/
static int DrawPillarColumn(int z_bottom, int z_top, const PalSpriteID *psid, int x, int y, int w, int h)
{
int cur_z;
for (cur_z = z_top; cur_z >= z_bottom; cur_z -= TILE_HEIGHT) {
DrawPillar(psid, x, y, cur_z, w, h, nullptr);
}
return cur_z;
}
/**
* Draws the pillars under high bridges.
*
* @param psid Image and palette of a bridge pillar.
* @param ti #TileInfo of current bridge-middle-tile.
* @param axis Orientation of bridge.
* @param drawfarpillar Whether to draw the pillar at the back
* @param x Sprite X position of front pillar.
* @param y Sprite Y position of front pillar.
* @param z_bridge Absolute height of bridge bottom.
*/
static void DrawBridgePillars(const PalSpriteID *psid, const TileInfo *ti, Axis axis, bool drawfarpillar, int x, int y, int z_bridge)
{
static const int bounding_box_size[2] = {16, 2}; ///< bounding box size of pillars along bridge direction
static const int back_pillar_offset[2] = { 0, 9}; ///< sprite position offset of back facing pillar
static const int INF = 1000; ///< big number compared to sprite size
static const SubSprite half_pillar_sub_sprite[2][2] = {
{ { -14, -INF, INF, INF }, { -INF, -INF, -15, INF } }, // X axis, north and south
{ { -INF, -INF, 15, INF }, { 16, -INF, INF, INF } }, // Y axis, north and south
};
if (psid->sprite == 0) return;
/* Determine ground height under pillars */
DiagDirection south_dir = AxisToDiagDir(axis);
int z_front_north = ti->z;
int z_back_north = ti->z;
int z_front_south = ti->z;
int z_back_south = ti->z;
GetSlopePixelZOnEdge(ti->tileh, south_dir, z_front_south, z_back_south);
GetSlopePixelZOnEdge(ti->tileh, ReverseDiagDir(south_dir), z_front_north, z_back_north);
/* Shared height of pillars */
int z_front = std::max(z_front_north, z_front_south);
int z_back = std::max(z_back_north, z_back_south);
/* x and y size of bounding-box of pillars */
int w = bounding_box_size[axis];
int h = bounding_box_size[OtherAxis(axis)];
/* sprite position of back facing pillar */
int x_back = x - back_pillar_offset[axis];
int y_back = y - back_pillar_offset[OtherAxis(axis)];
/* Draw front pillars */
int bottom_z = DrawPillarColumn(z_front, z_bridge, psid, x, y, w, h);
if (z_front_north < z_front) DrawPillar(psid, x, y, bottom_z, w, h, &half_pillar_sub_sprite[axis][0]);
if (z_front_south < z_front) DrawPillar(psid, x, y, bottom_z, w, h, &half_pillar_sub_sprite[axis][1]);
/* Draw back pillars, skip top two parts, which are hidden by the bridge */
int z_bridge_back = z_bridge - 2 * (int)TILE_HEIGHT;
if (drawfarpillar && (z_back_north <= z_bridge_back || z_back_south <= z_bridge_back)) {
bottom_z = DrawPillarColumn(z_back, z_bridge_back, psid, x_back, y_back, w, h);
if (z_back_north < z_back) DrawPillar(psid, x_back, y_back, bottom_z, w, h, &half_pillar_sub_sprite[axis][0]);
if (z_back_south < z_back) DrawPillar(psid, x_back, y_back, bottom_z, w, h, &half_pillar_sub_sprite[axis][1]);
}
}
/**
* Retrieve the sprites required for catenary on a road/tram bridge.
* @param rti RoadTypeInfo for the road or tram type to get catenary for
* @param head_tile Bridge head tile with roadtype information
* @param offset Sprite offset identifying flat to sloped bridge tiles
* @param head Are we drawing bridge head?
* @param[out] spr_back Back catenary sprite to use
* @param[out] spr_front Front catenary sprite to use
*/
static void GetBridgeRoadCatenary(const RoadTypeInfo *rti, TileIndex head_tile, int offset, bool head, SpriteID &spr_back, SpriteID &spr_front)
{
static const SpriteID back_offsets[6] = { 95, 96, 99, 102, 100, 101 };
static const SpriteID front_offsets[6] = { 97, 98, 103, 106, 104, 105 };
/* Simplified from DrawRoadTypeCatenary() to remove all the special cases required for regular ground road */
spr_back = GetCustomRoadSprite(rti, head_tile, ROTSG_CATENARY_BACK, head ? TCX_NORMAL : TCX_ON_BRIDGE);
spr_front = GetCustomRoadSprite(rti, head_tile, ROTSG_CATENARY_FRONT, head ? TCX_NORMAL : TCX_ON_BRIDGE);
if (spr_back == 0 && spr_front == 0) {
spr_back = SPR_TRAMWAY_BASE + back_offsets[offset];
spr_front = SPR_TRAMWAY_BASE + front_offsets[offset];
} else {
if (spr_back != 0) spr_back += 23 + offset;
if (spr_front != 0) spr_front += 23 + offset;
}
}
/**
* Draws the road and trambits over an already drawn (lower end) of a bridge.
* @param head_tile bridge head tile with roadtype information
* @param x the x of the bridge
* @param y the y of the bridge
* @param z the z of the bridge
* @param offset sprite offset identifying flat to sloped bridge tiles
* @param head are we drawing bridge head?
*/
static void DrawBridgeRoadBits(TileIndex head_tile, int x, int y, int z, int offset, bool head)
{
RoadType road_rt = GetRoadTypeRoad(head_tile);
RoadType tram_rt = GetRoadTypeTram(head_tile);
if (IsRoadCustomBridgeHeadTile(head_tile)) {
RoadBits entrance_bit = DiagDirToRoadBits(GetTunnelBridgeDirection(head_tile));
if (road_rt != INVALID_ROADTYPE && !(GetCustomBridgeHeadRoadBits(head_tile, RTT_ROAD) & entrance_bit)) road_rt = INVALID_ROADTYPE;
if (tram_rt != INVALID_ROADTYPE && !(GetCustomBridgeHeadRoadBits(head_tile, RTT_TRAM) & entrance_bit)) tram_rt = INVALID_ROADTYPE;
}
const RoadTypeInfo *road_rti = road_rt == INVALID_ROADTYPE ? nullptr : GetRoadTypeInfo(road_rt);
const RoadTypeInfo *tram_rti = tram_rt == INVALID_ROADTYPE ? nullptr : GetRoadTypeInfo(tram_rt);
SpriteID seq_back[4] = { 0 };
bool trans_back[4] = { false };
SpriteID seq_front[4] = { 0 };
bool trans_front[4] = { false };
static const SpriteID overlay_offsets[6] = { 0, 1, 11, 12, 13, 14 };
if (head || !IsInvisibilitySet(TO_BRIDGES)) {
/* Road underlay takes precedence over tram */
trans_back[0] = !head && IsTransparencySet(TO_BRIDGES);
if (road_rti != nullptr) {
if (road_rti->UsesOverlay()) {
seq_back[0] = GetCustomRoadSprite(road_rti, head_tile, ROTSG_BRIDGE, head ? TCX_NORMAL : TCX_ON_BRIDGE) + offset;
}
} else if (tram_rti != nullptr) {
if (tram_rti->UsesOverlay()) {
seq_back[0] = GetCustomRoadSprite(tram_rti, head_tile, ROTSG_BRIDGE, head ? TCX_NORMAL : TCX_ON_BRIDGE) + offset;
} else {
seq_back[0] = SPR_TRAMWAY_BRIDGE + offset;
}
}
/* Draw road overlay */
trans_back[1] = !head && IsTransparencySet(TO_BRIDGES);
if (road_rti != nullptr) {
if (road_rti->UsesOverlay()) {
seq_back[1] = GetCustomRoadSprite(road_rti, head_tile, ROTSG_OVERLAY, head ? TCX_NORMAL : TCX_ON_BRIDGE);
if (seq_back[1] != 0) seq_back[1] += overlay_offsets[offset];
}
}
/* Draw tram overlay */
trans_back[2] = !head && IsTransparencySet(TO_BRIDGES);
if (tram_rti != nullptr) {
if (tram_rti->UsesOverlay()) {
seq_back[2] = GetCustomRoadSprite(tram_rti, head_tile, ROTSG_OVERLAY, head ? TCX_NORMAL : TCX_ON_BRIDGE);
if (seq_back[2] != 0) seq_back[2] += overlay_offsets[offset];
} else if (road_rti != nullptr) {
seq_back[2] = SPR_TRAMWAY_OVERLAY + overlay_offsets[offset];
}
}
/* Road catenary takes precedence over tram */
trans_back[3] = IsTransparencySet(TO_CATENARY);
trans_front[0] = IsTransparencySet(TO_CATENARY);
if (road_rti != nullptr && HasRoadCatenaryDrawn(road_rt)) {
GetBridgeRoadCatenary(road_rti, head_tile, offset, head, seq_back[3], seq_front[0]);
} else if (tram_rti != nullptr && HasRoadCatenaryDrawn(tram_rt)) {
GetBridgeRoadCatenary(tram_rti, head_tile, offset, head, seq_back[3], seq_front[0]);
}
}
static const uint size_x[6] = { 1, 16, 16, 1, 16, 1 };
static const uint size_y[6] = { 16, 1, 1, 16, 1, 16 };
static const uint front_bb_offset_x[6] = { 15, 0, 0, 15, 0, 15 };
static const uint front_bb_offset_y[6] = { 0, 15, 15, 0, 15, 0 };
/* The sprites under the vehicles are drawn as SpriteCombine. StartSpriteCombine() has already been called
* The bounding boxes here are the same as for bridge front/roof */
for (uint i = 0; i < lengthof(seq_back); ++i) {
if (seq_back[i] != 0) {
AddSortableSpriteToDraw(seq_back[i], PAL_NONE,
x, y, size_x[offset], size_y[offset], 0x28, z,
trans_back[i]);
}
}
/* Start a new SpriteCombine for the front part */
EndSpriteCombine();
StartSpriteCombine();
for (uint i = 0; i < lengthof(seq_front); ++i) {
if (seq_front[i] != 0) {
AddSortableSpriteToDraw(seq_front[i], PAL_NONE,
x, y, size_x[offset] + front_bb_offset_x[offset], size_y[offset] + front_bb_offset_y[offset], 0x28, z,
trans_front[i],
front_bb_offset_x[offset], front_bb_offset_y[offset]);
}
}
}
static void DrawTunnelBridgeRampSingleSignal(const TileInfo *ti, bool is_green, uint position, SignalType type, bool show_exit)
{
bool side = (_settings_game.vehicle.road_side != 0) && _settings_game.construction.train_signal_side;
DiagDirection dir = GetTunnelBridgeDirection(ti->tile);
uint8_t style = GetTunnelBridgeSignalStyle(ti->tile);
side ^= HasBit(_signal_style_masks.signal_opposite_side, style);
static const Point SignalPositions[2][4] = {
{ /* X X Y Y Signals on the left side */
{13, 3}, { 2, 13}, { 3, 4}, {13, 14}
}, {/* X X Y Y Signals on the right side */
{14, 13}, { 3, 3}, {13, 2}, { 3, 13}
}
};
uint x = TileX(ti->tile) * TILE_SIZE + SignalPositions[side != show_exit][position ^ (show_exit ? 1 : 0)].x;
uint y = TileY(ti->tile) * TILE_SIZE + SignalPositions[side != show_exit][position ^ (show_exit ? 1 : 0)].y;
uint z = ti->z;
if (ti->tileh == SLOPE_FLAT && side == show_exit && dir == DIAGDIR_SE) z += 2;
if (ti->tileh == SLOPE_FLAT && side != show_exit && dir == DIAGDIR_SW) z += 2;
if (ti->tileh != SLOPE_FLAT && IsBridge(ti->tile)) z += 8; // sloped bridge head
SignalVariant variant = IsTunnelBridgeSemaphore(ti->tile) ? SIG_SEMAPHORE : SIG_ELECTRIC;
const RailTypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
uint8_t aspect = 0;
if (is_green) {
if (_extra_aspects > 0) {
aspect = show_exit ? GetTunnelBridgeExitSignalAspect(ti->tile) : GetTunnelBridgeEntranceSignalAspect(ti->tile);
} else {
aspect = 1;
}
}
bool show_restricted = IsTunnelBridgeRestrictedSignal(ti->tile);
const TraceRestrictProgram *prog = show_restricted ? GetExistingTraceRestrictProgram(ti->tile, FindFirstTrack(GetAcrossTunnelBridgeTrackBits(ti->tile))) : nullptr;
CustomSignalSpriteContext ctx = { show_exit ? CSSC_TUNNEL_BRIDGE_EXIT : CSSC_TUNNEL_BRIDGE_ENTRANCE };
if (IsTunnel(ti->tile)) ctx.ctx_flags |= CSSCF_TUNNEL;
const CustomSignalSpriteResult result = GetCustomSignalSprite(rti, ti->tile, type, variant, aspect, ctx, style, prog, z);
PalSpriteID sprite = result.sprite;
bool is_custom_sprite = (sprite.sprite != 0);
if (is_custom_sprite) {
sprite.sprite += position;
} else {
if (variant == SIG_ELECTRIC && type == SIGTYPE_BLOCK) {
/* Normal electric signals are picked from original sprites. */
sprite = { SPR_ORIGINAL_SIGNALS_BASE + ((position << 1) + is_green), PAL_NONE };
if (_settings_client.gui.show_all_signal_default == SSDM_ON) sprite.sprite += SPR_DUP_ORIGINAL_SIGNALS_BASE - SPR_ORIGINAL_SIGNALS_BASE;
} else {
/* All other signals are picked from add on sprites. */
sprite = { SPR_SIGNALS_BASE + ((type - 1) * 16 + variant * 64 + (position << 1) + is_green) + (IsSignalSpritePBS(type) ? 64 : 0), PAL_NONE };
if (_settings_client.gui.show_all_signal_default == SSDM_ON) sprite.sprite += SPR_DUP_SIGNALS_BASE - SPR_SIGNALS_BASE;
}
SpriteFile *file = GetOriginFile(sprite.sprite);
is_custom_sprite = (file != nullptr) && (file->flags & SFF_USERGRF);
}
if (is_custom_sprite && show_restricted && style == 0 && _settings_client.gui.show_restricted_signal_recolour &&
_settings_client.gui.show_all_signal_default == SSDM_RESTRICTED_RECOLOUR && !result.restricted_valid && variant == SIG_ELECTRIC) {
/* Use duplicate sprite block, instead of GRF-specified signals */
sprite = { (type == SIGTYPE_BLOCK && variant == SIG_ELECTRIC) ? SPR_DUP_ORIGINAL_SIGNALS_BASE : SPR_DUP_SIGNALS_BASE - 16, PAL_NONE };
sprite.sprite += type * 16 + variant * 64 + position * 2 + is_green + (IsSignalSpritePBS(type) ? 64 : 0);
is_custom_sprite = false;
}
if (!is_custom_sprite && show_restricted && variant == SIG_ELECTRIC && _settings_client.gui.show_restricted_signal_recolour) {
extern void DrawRestrictedSignal(SignalType type, SpriteID sprite, int x, int y, int z, int dz, int bb_offset_z);
DrawRestrictedSignal(type, sprite.sprite, x, y, z, TILE_HEIGHT, BB_Z_SEPARATOR);
} else {
AddSortableSpriteToDraw(sprite.sprite, sprite.pal, x, y, 1, 1, TILE_HEIGHT, z, false, 0, 0, BB_Z_SEPARATOR);
}
}
/* Draws a signal on tunnel / bridge entrance tile. */
static void DrawTunnelBridgeRampSignal(const TileInfo *ti)
{
DiagDirection dir = GetTunnelBridgeDirection(ti->tile);
uint position;
switch (dir) {
default: NOT_REACHED();
case DIAGDIR_NE: position = 0; break;
case DIAGDIR_SE: position = 2; break;
case DIAGDIR_SW: position = 1; break;
case DIAGDIR_NW: position = 3; break;
}
if (IsTunnelBridgeSignalSimulationExit(ti->tile)) {
SignalType type = SIGTYPE_BLOCK;
if (IsTunnelBridgePBS(ti->tile)) {
type = IsTunnelBridgeSignalSimulationEntrance(ti->tile) ? SIGTYPE_PBS : SIGTYPE_PBS_ONEWAY;
}
DrawTunnelBridgeRampSingleSignal(ti, (GetTunnelBridgeExitSignalState(ti->tile) == SIGNAL_STATE_GREEN), position ^ 1, type, true);
}
if (IsTunnelBridgeSignalSimulationEntrance(ti->tile)) {
DrawTunnelBridgeRampSingleSignal(ti, (GetTunnelBridgeEntranceSignalState(ti->tile) == SIGNAL_STATE_GREEN), position, SIGTYPE_BLOCK, false);
}
}
static void GetBridgeSignalXY(TileIndex tile, DiagDirection bridge_direction, bool opposite_side, uint &position, uint &x, uint &y)
{
bool side = (_settings_game.vehicle.road_side != 0) && _settings_game.construction.train_signal_side;
side ^= opposite_side;
static const Point SignalPositions[2][4] = {
{ /* X X Y Y Signals on the left side */
{11, 3}, { 4, 13}, { 3, 4}, {11, 13}
}, {/* X X Y Y Signals on the right side */
{11, 13}, { 4, 3}, {13, 4}, { 3, 11}
}
};
switch (bridge_direction) {
default: NOT_REACHED();
case DIAGDIR_NE: position = 0; break;
case DIAGDIR_SE: position = 2; break;
case DIAGDIR_SW: position = 1; break;
case DIAGDIR_NW: position = 3; break;
}
x = TileX(tile) * TILE_SIZE + SignalPositions[side][position].x;
y = TileY(tile) * TILE_SIZE + SignalPositions[side][position].y;
}
/* Draws a signal on tunnel / bridge entrance tile. */
static void DrawBridgeSignalOnMiddlePart(const TileInfo *ti, TileIndex bridge_start_tile, TileIndex bridge_end_tile, uint z)
{
uint bridge_signal_position = 0;
int m2_position = 0;
const uint bridge_section = GetTunnelBridgeLength(ti->tile, bridge_start_tile) + 1;
const uint simulated_wormhole_signals = GetTunnelBridgeSignalSimulationSpacing(bridge_start_tile);
while (bridge_signal_position <= bridge_section) {
bridge_signal_position += simulated_wormhole_signals;
if (bridge_signal_position == bridge_section) {
uint8_t style = GetBridgeSignalStyle(bridge_start_tile);
uint position, x, y;
GetBridgeSignalXY(ti->tile, GetTunnelBridgeDirection(bridge_start_tile), HasBit(_signal_style_masks.signal_opposite_side, style), position, x, y);
SignalVariant variant = IsTunnelBridgeSemaphore(bridge_start_tile) ? SIG_SEMAPHORE : SIG_ELECTRIC;
SignalState state = GetBridgeEntranceSimulatedSignalState(bridge_start_tile, m2_position);
uint8_t aspect = 0;
if (state == SIGNAL_STATE_GREEN) {
aspect = 1;
if (_extra_aspects > 0) {
const uint bridge_length = GetTunnelBridgeLength(bridge_start_tile, bridge_end_tile) + 1;
while (true) {
bridge_signal_position += simulated_wormhole_signals;
if (bridge_signal_position >= bridge_length) {
if (GetTunnelBridgeExitSignalState(bridge_end_tile) == SIGNAL_STATE_GREEN) aspect += GetTunnelBridgeExitSignalAspect(bridge_end_tile);
break;
}
m2_position++;
if (GetBridgeEntranceSimulatedSignalState(bridge_start_tile, m2_position) != SIGNAL_STATE_GREEN) break;
aspect++;
if (aspect >= GetMaximumSignalAspect()) break;
}
}
}
const RailTypeInfo *rti = GetRailTypeInfo(GetRailType(bridge_start_tile));
PalSpriteID sprite = GetCustomSignalSprite(rti, bridge_start_tile, SIGTYPE_BLOCK, variant, aspect, { CSSC_BRIDGE_MIDDLE }, style).sprite;
if (sprite.sprite != 0) {
sprite.sprite += position;
} else {
if (variant == SIG_ELECTRIC) {
/* Normal electric signals are picked from original sprites. */
sprite.sprite = SPR_ORIGINAL_SIGNALS_BASE + (position << 1) + (state == SIGNAL_STATE_GREEN ? 1 : 0);
if (_settings_client.gui.show_all_signal_default == SSDM_ON) sprite.sprite += SPR_DUP_ORIGINAL_SIGNALS_BASE - SPR_ORIGINAL_SIGNALS_BASE;
} else {
/* All other signals are picked from add on sprites. */
sprite.sprite = SPR_SIGNALS_BASE + (variant * 64) + (position << 1) - 16 + (state == SIGNAL_STATE_GREEN ? 1 : 0);
if (_settings_client.gui.show_all_signal_default == SSDM_ON) sprite.sprite += SPR_DUP_SIGNALS_BASE - SPR_SIGNALS_BASE;
}
sprite.pal = PAL_NONE;
}
AddSortableSpriteToDraw(sprite.sprite, sprite.pal, x, y, 1, 1, TILE_HEIGHT, z + 5, false, 0, 0, BB_Z_SEPARATOR);
break;
}
m2_position++;
}
}
void MarkSingleBridgeSignalDirty(TileIndex tile, TileIndex bridge_start_tile)
{
if (_signal_sprite_oversized) {
MarkTileDirtyByTile(tile, VMDF_NOT_MAP_MODE);
return;
}
bool opposite_side = false;
if (_signal_style_masks.signal_opposite_side != 0) {
opposite_side = HasBit(_signal_style_masks.signal_opposite_side, GetTunnelBridgeSignalStyle(bridge_start_tile));
}
uint position, x, y;
GetBridgeSignalXY(tile, GetTunnelBridgeDirection(bridge_start_tile), opposite_side, position, x, y);
Point pt = RemapCoords(x, y, GetBridgePixelHeight(bridge_start_tile) + 5 - BRIDGE_Z_START);
MarkAllViewportsDirty(
pt.x - SIGNAL_DIRTY_LEFT,
pt.y - SIGNAL_DIRTY_TOP,
pt.x + SIGNAL_DIRTY_RIGHT,
pt.y + SIGNAL_DIRTY_BOTTOM,
VMDF_NOT_MAP_MODE
);
}
static int GetTunnelBridgeSignalZNonRailCustom(TileIndex tile, bool side, bool exit, DiagDirection dir)
{
int z;
if (IsTunnel(tile)) {
z = GetTileZ(tile) * TILE_HEIGHT;
} else {
Slope slope;
std::tie(slope, z) = GetTilePixelSlope(tile);
if (slope == SLOPE_FLAT) {
if (side == exit && dir == DIAGDIR_SE) z += 2;
if (side != exit && dir == DIAGDIR_SW) z += 2;
} else {
z += 8;
}
}
return z;
}
int GetTunnelBridgeSignalZ(TileIndex tile, bool exit)
{
if (IsRailCustomBridgeHeadTile(tile)) {
return GetTileMaxPixelZ(tile);
}
bool opposite_side = false;
if (_signal_style_masks.signal_opposite_side != 0) {
opposite_side = HasBit(_signal_style_masks.signal_opposite_side, GetTunnelBridgeSignalStyle(tile));
}
bool side = (_settings_game.vehicle.road_side != 0) && _settings_game.construction.train_signal_side;
side ^= opposite_side;
return GetTunnelBridgeSignalZNonRailCustom(tile, side, exit, GetTunnelBridgeDirection(tile));
}
void MarkTunnelBridgeSignalDirty(TileIndex tile, bool exit)
{
if (_signal_sprite_oversized) {
MarkTileDirtyByTile(tile, VMDF_NOT_MAP_MODE);
return;
}
bool opposite_side = false;
if (_signal_style_masks.signal_opposite_side != 0) {
opposite_side = HasBit(_signal_style_masks.signal_opposite_side, GetTunnelBridgeSignalStyle(tile));
}
if (IsRailCustomBridgeHeadTile(tile)) {
Trackdir td = exit ? GetTunnelBridgeExitTrackdir(tile) : GetTunnelBridgeEntranceTrackdir(tile);
MarkSingleSignalDirtyAtZ(tile, td, opposite_side, GetTileMaxPixelZ(tile));
return;
}
bool side = (_settings_game.vehicle.road_side != 0) && _settings_game.construction.train_signal_side;
DiagDirection dir = GetTunnelBridgeDirection(tile);
side ^= opposite_side;
uint position;
switch (dir) {
default: NOT_REACHED();
case DIAGDIR_NE: position = 0; break;
case DIAGDIR_SE: position = 2; break;
case DIAGDIR_SW: position = 1; break;
case DIAGDIR_NW: position = 3; break;
}
static const Point SignalPositions[2][4] = {
{ /* X X Y Y Signals on the left side */
{13, 3}, { 2, 13}, { 3, 4}, {13, 14}
}, {/* X X Y Y Signals on the right side */
{14, 13}, { 3, 3}, {13, 2}, { 3, 13}
}
};
uint x = TileX(tile) * TILE_SIZE + SignalPositions[side != exit][position].x;
uint y = TileY(tile) * TILE_SIZE + SignalPositions[side != exit][position].y;
int z = GetTunnelBridgeSignalZNonRailCustom(tile, side, exit, dir);
Point pt = RemapCoords(x, y, z);
MarkAllViewportsDirty(
pt.x - SIGNAL_DIRTY_LEFT,
pt.y - SIGNAL_DIRTY_TOP,
pt.x + SIGNAL_DIRTY_RIGHT,
pt.y + SIGNAL_DIRTY_BOTTOM,
VMDF_NOT_MAP_MODE
);
}
/**
* Draws a tunnel of bridge tile.
* For tunnels, this is rather simple, as you only need to draw the entrance.
* Bridges are a bit more complex. base_offset is where the sprite selection comes into play
* and it works a bit like a bitmask. For bridge heads:
* @param ti TileInfo of the structure to draw
*
- Bit 0: direction
* - Bit 1: northern or southern heads
* - Bit 2: Set if the bridge head is sloped
* - Bit 3 and more: Railtype Specific subset
*
* Please note that in this code, "roads" are treated as railtype 1, whilst the real railtypes are 0, 2 and 3
*/
static void DrawTile_TunnelBridge(TileInfo *ti, DrawTileProcParams params)
{
TransportType transport_type = GetTunnelBridgeTransportType(ti->tile);
DiagDirection tunnelbridge_direction = GetTunnelBridgeDirection(ti->tile);
if (IsTunnel(ti->tile)) {
/* Front view of tunnel bounding boxes:
*
* 122223 <- BB_Z_SEPARATOR
* 1 3
* 1 3 1,3 = empty helper BB
* 1 3 2 = SpriteCombine of tunnel-roof and catenary (tram & elrail)
*
*/
static const int _tunnel_BB[4][12] = {
/* tunnnel-roof | Z-separator | tram-catenary
* w h bb_x bb_y| x y w h |bb_x bb_y w h */
{ 1, 0, -15, -14, 0, 15, 16, 1, 0, 1, 16, 15 }, // NE
{ 0, 1, -14, -15, 15, 0, 1, 16, 1, 0, 15, 16 }, // SE
{ 1, 0, -15, -14, 0, 15, 16, 1, 0, 1, 16, 15 }, // SW
{ 0, 1, -14, -15, 15, 0, 1, 16, 1, 0, 15, 16 }, // NW
};
const int *BB_data = _tunnel_BB[tunnelbridge_direction];
bool catenary = false;
SpriteID image;
SpriteID railtype_overlay = 0;
if (transport_type == TRANSPORT_RAIL) {
const RailTypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
image = rti->base_sprites.tunnel;
if (rti->UsesOverlay()) {
/* Check if the railtype has custom tunnel portals. */
railtype_overlay = GetCustomRailSprite(rti, ti->tile, RTSG_TUNNEL_PORTAL);
if (railtype_overlay != 0) image = SPR_RAILTYPE_TUNNEL_BASE; // Draw blank grass tunnel base.
}
} else {
image = SPR_TUNNEL_ENTRY_REAR_ROAD;
}
if (HasTunnelBridgeSnowOrDesert(ti->tile)) image += railtype_overlay != 0 ? 8 : 32;
image += tunnelbridge_direction * 2;
DrawGroundSprite(image, PAL_NONE);
if (transport_type == TRANSPORT_ROAD) {
RoadType road_rt = GetRoadTypeRoad(ti->tile);
RoadType tram_rt = GetRoadTypeTram(ti->tile);
const RoadTypeInfo *road_rti = road_rt == INVALID_ROADTYPE ? nullptr : GetRoadTypeInfo(road_rt);
const RoadTypeInfo *tram_rti = tram_rt == INVALID_ROADTYPE ? nullptr : GetRoadTypeInfo(tram_rt);
uint sprite_offset = DiagDirToAxis(tunnelbridge_direction) == AXIS_X ? 1 : 0;
bool draw_underlay = true;
/* Road underlay takes precedence over tram */
if (road_rti != nullptr) {
if (road_rti->UsesOverlay()) {
SpriteID ground = GetCustomRoadSprite(road_rti, ti->tile, ROTSG_TUNNEL);
if (ground != 0) {
DrawGroundSprite(ground + tunnelbridge_direction, PAL_NONE);
draw_underlay = false;
}
}
} else {
if (tram_rti->UsesOverlay()) {
SpriteID ground = GetCustomRoadSprite(tram_rti, ti->tile, ROTSG_TUNNEL);
if (ground != 0) {
DrawGroundSprite(ground + tunnelbridge_direction, PAL_NONE);
draw_underlay = false;
}
}
}
DrawRoadOverlays(ti, PAL_NONE, road_rti, tram_rti, sprite_offset, sprite_offset, draw_underlay);
/* Road catenary takes precedence over tram */
SpriteID catenary_sprite_base = 0;
if (road_rti != nullptr && HasRoadCatenaryDrawn(road_rt)) {
catenary_sprite_base = GetCustomRoadSprite(road_rti, ti->tile, ROTSG_CATENARY_FRONT);
if (catenary_sprite_base == 0) {
catenary_sprite_base = SPR_TRAMWAY_TUNNEL_WIRES;
} else {
catenary_sprite_base += 19;
}
} else if (tram_rti != nullptr && HasRoadCatenaryDrawn(tram_rt)) {
catenary_sprite_base = GetCustomRoadSprite(tram_rti, ti->tile, ROTSG_CATENARY_FRONT);
if (catenary_sprite_base == 0) {
catenary_sprite_base = SPR_TRAMWAY_TUNNEL_WIRES;
} else {
catenary_sprite_base += 19;
}
}
if (catenary_sprite_base != 0) {
catenary = true;
StartSpriteCombine();
AddSortableSpriteToDraw(catenary_sprite_base + tunnelbridge_direction, PAL_NONE, ti->x, ti->y, BB_data[10], BB_data[11], TILE_HEIGHT, ti->z, IsTransparencySet(TO_CATENARY), BB_data[8], BB_data[9], BB_Z_SEPARATOR);
}
} else {
const RailTypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
if (rti->UsesOverlay()) {
SpriteID surface = GetCustomRailSprite(rti, ti->tile, RTSG_TUNNEL);
if (surface != 0) DrawGroundSprite(surface + tunnelbridge_direction, PAL_NONE);
}
/* PBS debugging, draw reserved tracks darker */
if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasTunnelReservation(ti->tile)) {
if (rti->UsesOverlay()) {
SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
DrawGroundSprite(overlay + RTO_X + DiagDirToAxis(tunnelbridge_direction), PALETTE_CRASH);
} else {
DrawGroundSprite(DiagDirToAxis(tunnelbridge_direction) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
}
}
if (HasRailCatenaryDrawn(GetRailType(ti->tile))) {
/* Maybe draw pylons on the entry side */
DrawRailCatenary(ti);
catenary = true;
StartSpriteCombine();
/* Draw wire above the ramp */
DrawRailCatenaryOnTunnel(ti);
}
}
if (railtype_overlay != 0 && !catenary) StartSpriteCombine();
AddSortableSpriteToDraw(image + 1, PAL_NONE, ti->x + TILE_SIZE - 1, ti->y + TILE_SIZE - 1, BB_data[0], BB_data[1], TILE_HEIGHT, ti->z, false, BB_data[2], BB_data[3], BB_Z_SEPARATOR);
/* Draw railtype tunnel portal overlay if defined. */
if (railtype_overlay != 0) AddSortableSpriteToDraw(railtype_overlay + tunnelbridge_direction, PAL_NONE, ti->x + TILE_SIZE - 1, ti->y + TILE_SIZE - 1, BB_data[0], BB_data[1], TILE_HEIGHT, ti->z, false, BB_data[2], BB_data[3], BB_Z_SEPARATOR);
if (catenary || railtype_overlay != 0) EndSpriteCombine();
/* Add helper BB for sprite sorting that separates the tunnel from things beside of it. */
AddSortableSpriteToDraw(SPR_EMPTY_BOUNDING_BOX, PAL_NONE, ti->x, ti->y, BB_data[6], BB_data[7], TILE_HEIGHT, ti->z);
AddSortableSpriteToDraw(SPR_EMPTY_BOUNDING_BOX, PAL_NONE, ti->x + BB_data[4], ti->y + BB_data[5], BB_data[6], BB_data[7], TILE_HEIGHT, ti->z);
/* Draw signals for tunnel. */
if (IsTunnelBridgeWithSignalSimulation(ti->tile)) DrawTunnelBridgeRampSignal(ti);
DrawBridgeMiddle(ti);
} else { // IsBridge(ti->tile)
if (transport_type == TRANSPORT_ROAD && IsRoadCustomBridgeHead(ti->tile)) {
DrawRoadBitsTunnelBridge(ti);
DrawBridgeMiddle(ti);
return;
}
if (transport_type == TRANSPORT_RAIL && IsRailCustomBridgeHead(ti->tile)) {
const RailTypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
DrawTrackBits(ti, GetCustomBridgeHeadTrackBits(ti->tile));
if (HasBit(_display_opt, DO_FULL_DETAIL)) {
extern void DrawTrackDetails(const TileInfo *ti, const RailTypeInfo *rti, const RailGroundType rgt);
DrawTrackDetails(ti, rti, GetTunnelBridgeGroundType(ti->tile));
}
if (HasRailCatenaryDrawn(GetRailType(ti->tile), GetTileSecondaryRailTypeIfValid(ti->tile))) {
DrawRailCatenary(ti);
}
if (IsTunnelBridgeWithSignalSimulation(ti->tile)) {
extern void DrawSingleSignal(TileIndex tile, const RailTypeInfo *rti, Track track, SignalState condition,
SignalOffsets image, uint pos, SignalType type, SignalVariant variant, const TraceRestrictProgram *prog, CustomSignalSpriteContext context);
DiagDirection dir = GetTunnelBridgeDirection(ti->tile);
SignalVariant variant = IsTunnelBridgeSemaphore(ti->tile) ? SIG_SEMAPHORE : SIG_ELECTRIC;
Track t = FindFirstTrack(GetAcrossTunnelBridgeTrackBits(ti->tile));
auto draw_signals = [&](uint position, SignalOffsets image, DiagDirection towards) {
if (dir == towards) {
/* flip signal directions */
position ^= 1;
image = (SignalOffsets)(image ^ 1);
}
const TraceRestrictProgram *prog = IsTunnelBridgeRestrictedSignal(ti->tile) ? GetExistingTraceRestrictProgram(ti->tile, t) : nullptr;
if (IsTunnelBridgeSignalSimulationEntrance(ti->tile)) {
CustomSignalSpriteContext ctx = { CSSC_TUNNEL_BRIDGE_ENTRANCE };
DrawSingleSignal(ti->tile, rti, t, GetTunnelBridgeEntranceSignalState(ti->tile), image, position, SIGTYPE_BLOCK, variant, prog, ctx);
}
if (IsTunnelBridgeSignalSimulationExit(ti->tile)) {
SignalType type = SIGTYPE_BLOCK;
if (IsTunnelBridgePBS(ti->tile)) {
type = IsTunnelBridgeSignalSimulationEntrance(ti->tile) ? SIGTYPE_PBS : SIGTYPE_PBS_ONEWAY;
}
CustomSignalSpriteContext ctx = { CSSC_TUNNEL_BRIDGE_EXIT };
DrawSingleSignal(ti->tile, rti, t, GetTunnelBridgeExitSignalState(ti->tile), (SignalOffsets)(image ^ 1), position ^ 1, type, variant, prog, ctx);
}
};
switch (t) {
default: NOT_REACHED();
case TRACK_X: draw_signals( 8, SIGNAL_TO_SOUTHWEST, DIAGDIR_SW); break;
case TRACK_Y: draw_signals(10, SIGNAL_TO_SOUTHEAST, DIAGDIR_NW); break;
case TRACK_UPPER: draw_signals( 4, SIGNAL_TO_WEST, DIAGDIR_NW); break;
case TRACK_LOWER: draw_signals( 6, SIGNAL_TO_WEST, DIAGDIR_SW); break;
case TRACK_LEFT: draw_signals( 0, SIGNAL_TO_NORTH, DIAGDIR_NW); break;
case TRACK_RIGHT: draw_signals( 2, SIGNAL_TO_NORTH, DIAGDIR_NE); break;
}
}
DrawBridgeMiddle(ti);
return;
}
const PalSpriteID *psid;
int base_offset;
bool ice = HasTunnelBridgeSnowOrDesert(ti->tile);
if (transport_type == TRANSPORT_RAIL) {
base_offset = GetRailTypeInfo(GetRailType(ti->tile))->bridge_offset;
assert(base_offset != 8); // This one is used for roads
} else {
base_offset = 8;
}
/* as the lower 3 bits are used for other stuff, make sure they are clear */
assert( (base_offset & 0x07) == 0x00);
DrawFoundation(ti, GetBridgeFoundation(ti->tileh, DiagDirToAxis(tunnelbridge_direction)));
/* HACK Wizardry to convert the bridge ramp direction into a sprite offset */
base_offset += (6 - tunnelbridge_direction) % 4;
/* Table number BRIDGE_PIECE_HEAD always refers to the bridge heads for any bridge type */
if (transport_type != TRANSPORT_WATER) {
if (ti->tileh == SLOPE_FLAT) base_offset += 4; // sloped bridge head
psid = &GetBridgeSpriteTable(GetBridgeType(ti->tile), BRIDGE_PIECE_HEAD)[base_offset];
} else {
psid = _aqueduct_sprites + base_offset;
}
if (!ice) {
TileIndex next = ti->tile + TileOffsByDiagDir(tunnelbridge_direction);
if (ti->tileh != SLOPE_FLAT && ti->z == 0 && HasTileWaterClass(next) && GetWaterClass(next) == WATER_CLASS_SEA) {
DrawShoreTile(ti->tileh);
} else {
DrawClearLandTile(ti, 3);
}
} else {
DrawGroundSprite(SPR_FLAT_SNOW_DESERT_TILE + SlopeToSpriteOffset(ti->tileh), PAL_NONE);
}
/* draw ramp */
/* Draw Trambits and PBS Reservation as SpriteCombine */
if (transport_type == TRANSPORT_ROAD || transport_type == TRANSPORT_RAIL) StartSpriteCombine();
/* HACK set the height of the BB of a sloped ramp to 1 so a vehicle on
* it doesn't disappear behind it
*/
/* Bridge heads are drawn solid no matter how invisibility/transparency is set */
AddSortableSpriteToDraw(psid->sprite, psid->pal, ti->x, ti->y, 16, 16, ti->tileh == SLOPE_FLAT ? 0 : 8, ti->z);
if (transport_type == TRANSPORT_ROAD) {
uint offset = tunnelbridge_direction;
int z = ti->z;
if (ti->tileh != SLOPE_FLAT) {
offset = (offset + 1) & 1;
z += TILE_HEIGHT;
} else {
offset += 2;
}
/* DrawBridgeRoadBits() calls EndSpriteCombine() and StartSpriteCombine() */
DrawBridgeRoadBits(ti->tile, ti->x, ti->y, z, offset, true);
EndSpriteCombine();
} else if (transport_type == TRANSPORT_RAIL) {
const RailTypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
if (rti->UsesOverlay()) {
SpriteID surface = GetCustomRailSprite(rti, ti->tile, RTSG_BRIDGE);
if (surface != 0) {
if (HasBridgeFlatRamp(ti->tileh, DiagDirToAxis(tunnelbridge_direction))) {
AddSortableSpriteToDraw(surface + ((DiagDirToAxis(tunnelbridge_direction) == AXIS_X) ? RTBO_X : RTBO_Y), PAL_NONE, ti->x, ti->y, 16, 16, 0, ti->z + 8);
} else {
AddSortableSpriteToDraw(surface + RTBO_SLOPE + tunnelbridge_direction, PAL_NONE, ti->x, ti->y, 16, 16, 8, ti->z);
}
}
/* Don't fallback to non-overlay sprite -- the spec states that
* if an overlay is present then the bridge surface must be
* present. */
}
/* PBS debugging, draw reserved tracks darker */
if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && GetBridgeReservationTrackBits(ti->tile) != TRACK_BIT_NONE) {
if (rti->UsesOverlay()) {
SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
if (HasBridgeFlatRamp(ti->tileh, DiagDirToAxis(tunnelbridge_direction))) {
AddSortableSpriteToDraw(overlay + RTO_X + DiagDirToAxis(tunnelbridge_direction), PALETTE_CRASH, ti->x, ti->y, 16, 16, 0, ti->z + 8);
} else {
AddSortableSpriteToDraw(overlay + RTO_SLOPE_NE + tunnelbridge_direction, PALETTE_CRASH, ti->x, ti->y, 16, 16, 8, ti->z);
}
} else {
if (HasBridgeFlatRamp(ti->tileh, DiagDirToAxis(tunnelbridge_direction))) {
AddSortableSpriteToDraw(DiagDirToAxis(tunnelbridge_direction) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH, ti->x, ti->y, 16, 16, 0, ti->z + 8);
} else {
AddSortableSpriteToDraw(rti->base_sprites.single_sloped + tunnelbridge_direction, PALETTE_CRASH, ti->x, ti->y, 16, 16, 8, ti->z);
}
}
}
EndSpriteCombine();
if (HasRailCatenaryDrawn(GetRailType(ti->tile))) {
DrawRailCatenary(ti);
}
}
/* Draw signals for bridge. */
if (IsTunnelBridgeWithSignalSimulation(ti->tile)) DrawTunnelBridgeRampSignal(ti);
DrawBridgeMiddle(ti);
}
}
/**
* Compute bridge piece. Computes the bridge piece to display depending on the position inside the bridge.
* bridges pieces sequence (middle parts).
* Note that it is not covering the bridge heads, which are always referenced by the same sprite table.
* bridge len 1: BRIDGE_PIECE_NORTH
* bridge len 2: BRIDGE_PIECE_NORTH BRIDGE_PIECE_SOUTH
* bridge len 3: BRIDGE_PIECE_NORTH BRIDGE_PIECE_MIDDLE_ODD BRIDGE_PIECE_SOUTH
* bridge len 4: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH
* bridge len 5: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_MIDDLE_EVEN BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH
* bridge len 6: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH
* bridge len 7: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_MIDDLE_ODD BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH
* #0 - always as first, #1 - always as last (if len>1)
* #2,#3 are to pair in order
* for odd bridges: #5 is going in the bridge middle if on even position, #4 on odd (counting from 0)
* @param north Northernmost tile of bridge
* @param south Southernmost tile of bridge
* @return Index of bridge piece
*/
static BridgePieces CalcBridgePiece(uint north, uint south)
{
if (north == 1) {
return BRIDGE_PIECE_NORTH;
} else if (south == 1) {
return BRIDGE_PIECE_SOUTH;
} else if (north < south) {
return north & 1 ? BRIDGE_PIECE_INNER_SOUTH : BRIDGE_PIECE_INNER_NORTH;
} else if (north > south) {
return south & 1 ? BRIDGE_PIECE_INNER_NORTH : BRIDGE_PIECE_INNER_SOUTH;
} else {
return north & 1 ? BRIDGE_PIECE_MIDDLE_EVEN : BRIDGE_PIECE_MIDDLE_ODD;
}
}
BridgePiecePillarFlags GetBridgeTilePillarFlags(TileIndex tile, TileIndex northern_bridge_end, TileIndex southern_bridge_end, BridgeType bridge_type, TransportType bridge_transport_type)
{
if (bridge_transport_type == TRANSPORT_WATER) return BPPF_ALL_CORNERS;
BridgePieces piece = CalcBridgePiece(
GetTunnelBridgeLength(tile, northern_bridge_end) + 1,
GetTunnelBridgeLength(tile, southern_bridge_end) + 1
);
assert(piece < BRIDGE_PIECE_HEAD);
const BridgeSpec *spec = GetBridgeSpec(bridge_type);
const Axis axis = TileX(northern_bridge_end) == TileX(southern_bridge_end) ? AXIS_Y : AXIS_X;
if (!HasBit(spec->ctrl_flags, BSCF_INVALID_PILLAR_FLAGS)) {
return (BridgePiecePillarFlags) spec->pillar_flags[piece * 2 + (axis == AXIS_Y ? 1 : 0)];
} else {
uint base_offset;
if (bridge_transport_type == TRANSPORT_RAIL) {
base_offset = GetRailTypeInfo(GetRailType(southern_bridge_end))->bridge_offset;
} else {
base_offset = 8;
}
const PalSpriteID *psid = base_offset + GetBridgeSpriteTable(bridge_type, piece);
if (axis == AXIS_Y) psid += 4;
return (BridgePiecePillarFlags) (psid[2].sprite != 0 ? BPPF_ALL_CORNERS : 0);
}
}
BridgePieceDebugInfo GetBridgePieceDebugInfo(TileIndex tile)
{
TileIndex rampnorth = GetNorthernBridgeEnd(tile);
TileIndex rampsouth = GetSouthernBridgeEnd(tile);
BridgePieces piece = CalcBridgePiece(
GetTunnelBridgeLength(tile, rampnorth) + 1,
GetTunnelBridgeLength(tile, rampsouth) + 1
);
BridgePiecePillarFlags pillar_flags = GetBridgeTilePillarFlags(tile, rampnorth, rampsouth, GetBridgeType(rampnorth), GetTunnelBridgeTransportType(rampnorth));
const Axis axis = TileX(rampnorth) == TileX(rampsouth) ? AXIS_Y : AXIS_X;
uint pillar_index = piece * 2 + (axis == AXIS_Y ? 1 : 0);
return { piece, pillar_flags, pillar_index };
}
/**
* Draw the middle bits of a bridge.
* @param ti Tile information of the tile to draw it on.
*/
void DrawBridgeMiddle(const TileInfo *ti)
{
/* Sectional view of bridge bounding boxes:
*
* 1 2 1,2 = SpriteCombine of Bridge front/(back&floor) and RoadCatenary
* 1 2 3 = empty helper BB
* 1 7 2 4,5 = pillars under higher bridges
* 1 6 88888 6 2 6 = elrail-pylons
* 1 6 88888 6 2 7 = elrail-wire
* 1 6 88888 6 2 <- TILE_HEIGHT 8 = rail-vehicle on bridge
* 3333333333333 <- BB_Z_SEPARATOR
* <- unused
* 4 5 <- BB_HEIGHT_UNDER_BRIDGE
* 4 5
* 4 5
*
*/
if (!IsBridgeAbove(ti->tile)) return;
TileIndex rampnorth = GetNorthernBridgeEnd(ti->tile);
TileIndex rampsouth = GetSouthernBridgeEnd(ti->tile);
TransportType transport_type = GetTunnelBridgeTransportType(rampsouth);
Axis axis = GetBridgeAxis(ti->tile);
BridgePieces piece = CalcBridgePiece(
GetTunnelBridgeLength(ti->tile, rampnorth) + 1,
GetTunnelBridgeLength(ti->tile, rampsouth) + 1
);
const PalSpriteID *psid;
bool drawfarpillar;
if (transport_type != TRANSPORT_WATER) {
BridgeType type = GetBridgeType(rampsouth);
drawfarpillar = !HasBit(GetBridgeSpec(type)->flags, 0);
uint base_offset;
if (transport_type == TRANSPORT_RAIL) {
base_offset = GetRailTypeInfo(GetRailType(rampsouth))->bridge_offset;
} else {
base_offset = 8;
}
psid = base_offset + GetBridgeSpriteTable(type, piece);
} else {
drawfarpillar = true;
psid = _aqueduct_sprites;
}
if (axis != AXIS_X) psid += 4;
int x = ti->x;
int y = ti->y;
uint bridge_z = GetBridgePixelHeight(rampsouth);
int z = bridge_z - BRIDGE_Z_START;
/* Add a bounding box that separates the bridge from things below it. */
ViewportSortableSpriteSpecialFlags special_flags = VSSF_NONE;
if (IsPlainRailTile(ti->tile) && (GetTrackBits(ti->tile) & (TRACK_BIT_LEFT | TRACK_BIT_RIGHT | TRACK_BIT_LOWER)) != 0) {
/* Problematic diagonal rail track is underneath this bridge */
special_flags = VSSSF_SORT_SPECIAL | VSSSF_SORT_SORT_BRIDGE_BB;
}
AddSortableSpriteToDraw(SPR_EMPTY_BOUNDING_BOX, PAL_NONE, x, y, 16, 16, 1, bridge_z - TILE_HEIGHT + BB_Z_SEPARATOR, false, 0, 0, 0, nullptr, special_flags);
/* Draw Trambits as SpriteCombine */
if (transport_type == TRANSPORT_ROAD || transport_type == TRANSPORT_RAIL) StartSpriteCombine();
/* Draw floor and far part of bridge*/
if (!IsInvisibilitySet(TO_BRIDGES)) {
if (axis == AXIS_X) {
AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 16, 1, 0x28, z, IsTransparencySet(TO_BRIDGES), 0, 0, BRIDGE_Z_START);
} else {
AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 1, 16, 0x28, z, IsTransparencySet(TO_BRIDGES), 0, 0, BRIDGE_Z_START);
}
}
psid++;
if (transport_type == TRANSPORT_ROAD) {
/* DrawBridgeRoadBits() calls EndSpriteCombine() and StartSpriteCombine() */
DrawBridgeRoadBits(rampsouth, x, y, bridge_z, axis ^ 1, false);
} else if (transport_type == TRANSPORT_RAIL) {
const RailTypeInfo *rti = GetRailTypeInfo(GetRailType(rampsouth));
if (rti->UsesOverlay() && !IsInvisibilitySet(TO_BRIDGES)) {
SpriteID surface = GetCustomRailSprite(rti, rampsouth, RTSG_BRIDGE, TCX_ON_BRIDGE);
if (surface != 0) {
AddSortableSpriteToDraw(surface + axis, PAL_NONE, x, y, 16, 16, 0, bridge_z, IsTransparencySet(TO_BRIDGES));
}
}
if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && !IsInvisibilitySet(TO_BRIDGES)
&& !IsTunnelBridgeWithSignalSimulation(rampnorth) && (HasAcrossBridgeReservation(rampnorth) || HasAcrossBridgeReservation(rampsouth))) {
if (rti->UsesOverlay()) {
SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
AddSortableSpriteToDraw(overlay + RTO_X + axis, PALETTE_CRASH, ti->x, ti->y, 16, 16, 0, bridge_z, IsTransparencySet(TO_BRIDGES));
} else {
AddSortableSpriteToDraw(axis == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH, ti->x, ti->y, 16, 16, 0, bridge_z, IsTransparencySet(TO_BRIDGES));
}
}
EndSpriteCombine();
if (HasRailCatenaryDrawn(GetRailType(rampsouth))) {
DrawRailCatenaryOnBridge(ti);
}
if (IsTunnelBridgeSignalSimulationEntrance(rampsouth)) DrawBridgeSignalOnMiddlePart(ti, rampsouth, rampnorth, z);
if (IsTunnelBridgeSignalSimulationEntrance(rampnorth)) DrawBridgeSignalOnMiddlePart(ti, rampnorth, rampsouth, z);
}
/* draw roof, the component of the bridge which is logically between the vehicle and the camera */
if (!IsInvisibilitySet(TO_BRIDGES)) {
if (axis == AXIS_X) {
y += 12;
if (psid->sprite & SPRITE_MASK) AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 16, 4, 0x28, z, IsTransparencySet(TO_BRIDGES), 0, 3, BRIDGE_Z_START);
} else {
x += 12;
if (psid->sprite & SPRITE_MASK) AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 4, 16, 0x28, z, IsTransparencySet(TO_BRIDGES), 3, 0, BRIDGE_Z_START);
}
}
/* Draw TramFront as SpriteCombine */
if (transport_type == TRANSPORT_ROAD) EndSpriteCombine();
/* Do not draw anything more if bridges are invisible */
if (IsInvisibilitySet(TO_BRIDGES)) return;
psid++;
DrawBridgePillars(psid, ti, axis, drawfarpillar, x, y, z);
}
static int GetSlopePixelZ_TunnelBridge(TileIndex tile, uint x, uint y, bool ground_vehicle)
{
auto [tileh, z] = GetTilePixelSlope(tile);
x &= 0xF;
y &= 0xF;
if (IsTunnel(tile)) {
/* In the tunnel entrance? */
if (ground_vehicle) return z;
} else { // IsBridge(tile)
if (IsCustomBridgeHeadTile(tile)) {
return z + TILE_HEIGHT + (IsSteepSlope(tileh) ? TILE_HEIGHT : 0);
}
DiagDirection dir = GetTunnelBridgeDirection(tile);
z += ApplyPixelFoundationToSlope(GetBridgeFoundation(tileh, DiagDirToAxis(dir)), tileh);
/* On the bridge ramp? */
if (ground_vehicle) {
if (tileh != SLOPE_FLAT) return z + TILE_HEIGHT;
switch (dir) {
default: NOT_REACHED();
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;
}
}
}
return z + GetPartialPixelZ(x, y, tileh);
}
static Foundation GetFoundation_TunnelBridge(TileIndex tile, Slope tileh)
{
if (IsCustomBridgeHeadTile(tile)) return FOUNDATION_LEVELED;
return IsTunnel(tile) ? FOUNDATION_NONE : GetBridgeFoundation(tileh, DiagDirToAxis(GetTunnelBridgeDirection(tile)));
}
static void GetTileDesc_TunnelBridge(TileIndex tile, TileDesc *td)
{
TransportType tt = GetTunnelBridgeTransportType(tile);
if (IsTunnel(tile)) {
if (Tunnel::GetByTile(tile)->is_chunnel) {
td->str = (tt == TRANSPORT_RAIL) ? IsTunnelBridgeWithSignalSimulation(tile) ? STR_LAI_TUNNEL_DESCRIPTION_RAILROAD_SIGNAL_CHUNNEL : STR_LAI_TUNNEL_DESCRIPTION_RAILROAD_CHUNNEL : STR_LAI_TUNNEL_DESCRIPTION_ROAD_CHUNNEL;
} else {
td->str = (tt == TRANSPORT_RAIL) ? IsTunnelBridgeWithSignalSimulation(tile) ? STR_LAI_TUNNEL_DESCRIPTION_RAILROAD_SIGNAL : STR_LAI_TUNNEL_DESCRIPTION_RAILROAD : STR_LAI_TUNNEL_DESCRIPTION_ROAD;
}
} else { // IsBridge(tile)
td->str = (tt == TRANSPORT_WATER) ? STR_LAI_BRIDGE_DESCRIPTION_AQUEDUCT : IsTunnelBridgeWithSignalSimulation(tile) ? STR_LAI_BRIDGE_DESCRIPTION_RAILROAD_SIGNAL : GetBridgeSpec(GetBridgeType(tile))->transport_name[tt];
}
if (tt == TRANSPORT_RAIL) {
uint8_t style = GetTunnelBridgeSignalStyle(tile);
if (style > 0) {
/* Add suffix about signal style */
td->dparam[0] = td->str;
td->dparam[1] = style == 0 ? STR_BUILD_SIGNAL_DEFAULT_STYLE : _new_signal_styles[style - 1].name;
td->str = STR_LAI_RAIL_DESCRIPTION_TRACK_SIGNAL_STYLE;
}
if (IsTunnelBridgeWithSignalSimulation(tile) && IsTunnelBridgeRestrictedSignal(tile)) {
td->dparam[3] = td->dparam[2];
td->dparam[2] = td->dparam[1];
td->dparam[1] = td->dparam[0];
td->dparam[0] = td->str;
td->str = STR_LAI_RAIL_DESCRIPTION_RESTRICTED_SIGNAL;
}
}
td->owner[0] = GetTileOwner(tile);
if (tt == TRANSPORT_ROAD) {
Owner road_owner = INVALID_OWNER;
Owner tram_owner = INVALID_OWNER;
RoadType road_rt = GetRoadTypeRoad(tile);
RoadType tram_rt = GetRoadTypeTram(tile);
if (road_rt != INVALID_ROADTYPE) {
const RoadTypeInfo *rti = GetRoadTypeInfo(road_rt);
td->roadtype = rti->strings.name;
td->road_speed = rti->max_speed / 2;
road_owner = GetRoadOwner(tile, RTT_ROAD);
}
if (tram_rt != INVALID_ROADTYPE) {
const RoadTypeInfo *rti = GetRoadTypeInfo(tram_rt);
td->tramtype = rti->strings.name;
td->tram_speed = rti->max_speed / 2;
tram_owner = GetRoadOwner(tile, RTT_TRAM);
}
/* Is there a mix of owners? */
if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
(road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
uint i = 1;
if (road_owner != INVALID_OWNER) {
td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
td->owner[i] = road_owner;
i++;
}
if (tram_owner != INVALID_OWNER) {
td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
td->owner[i] = tram_owner;
}
}
if (!IsTunnel(tile)) {
uint16_t spd = GetBridgeSpec(GetBridgeType(tile))->speed;
/* road speed special-cases 0 as unlimited, hides display of limit etc. */
if (spd == UINT16_MAX) spd = 0;
if (road_rt != INVALID_ROADTYPE && (td->road_speed == 0 || spd < td->road_speed)) td->road_speed = spd;
if (tram_rt != INVALID_ROADTYPE && (td->tram_speed == 0 || spd < td->tram_speed)) td->tram_speed = spd;
}
}
if (tt == TRANSPORT_RAIL) {
RailType rt = GetRailType(tile);
const RailTypeInfo *rti = GetRailTypeInfo(rt);
td->rail_speed = rti->max_speed;
td->railtype = rti->strings.name;
RailType secondary_rt = GetTileSecondaryRailTypeIfValid(tile);
if (secondary_rt != rt && secondary_rt != INVALID_RAILTYPE) {
const RailTypeInfo *secondary_rti = GetRailTypeInfo(secondary_rt);
td->rail_speed2 = secondary_rti->max_speed;
td->railtype2 = secondary_rti->strings.name;
}
if (!IsTunnel(tile)) {
uint16_t spd = GetBridgeSpec(GetBridgeType(tile))->speed;
/* rail speed special-cases 0 as unlimited, hides display of limit etc. */
if (spd == UINT16_MAX) spd = 0;
if (td->rail_speed == 0 || spd < td->rail_speed) {
td->rail_speed = spd;
}
}
}
}
static const RailGroundType _tunnel_bridge_fence_table[4][5] = {
{ // DIAGDIR_NE
RAIL_GROUND_FENCE_NW,
RAIL_GROUND_FENCE_SE,
RAIL_GROUND_FENCE_SW,
RAIL_GROUND_FENCE_VERT2,
RAIL_GROUND_FENCE_HORIZ1,
},
{ // DIAGDIR_SE
RAIL_GROUND_FENCE_NW,
RAIL_GROUND_FENCE_NE,
RAIL_GROUND_FENCE_SW,
RAIL_GROUND_FENCE_VERT2,
RAIL_GROUND_FENCE_HORIZ2,
},
{ // DIAGDIR_SW
RAIL_GROUND_FENCE_NW,
RAIL_GROUND_FENCE_SE,
RAIL_GROUND_FENCE_NE,
RAIL_GROUND_FENCE_VERT1,
RAIL_GROUND_FENCE_HORIZ2,
},
{ // DIAGDIR_NW
RAIL_GROUND_FENCE_SE,
RAIL_GROUND_FENCE_NE,
RAIL_GROUND_FENCE_SW,
RAIL_GROUND_FENCE_VERT1,
RAIL_GROUND_FENCE_HORIZ1,
},
};
RailGroundType GetTunnelBridgeGroundType(TileIndex tile)
{
uint8_t ground_bits = GetTunnelBridgeGroundBits(tile);
if (ground_bits == 0) return RAIL_GROUND_GRASS;
if (ground_bits == 1) return RAIL_GROUND_ICE_DESERT;
if (ground_bits == 2) return RAIL_GROUND_BARREN;
return _tunnel_bridge_fence_table[GetTunnelBridgeDirection(tile)][ground_bits - 3];
}
static uint8_t MapTunnelBridgeGroundTypeBits(TileIndex tile, RailGroundType type)
{
uint8_t ground_bits;
switch (type) {
case RAIL_GROUND_BARREN:
ground_bits = 2;
break;
case RAIL_GROUND_GRASS:
ground_bits = 0;
break;
case RAIL_GROUND_FENCE_NW:
ground_bits = 3;
break;
case RAIL_GROUND_FENCE_SE:
ground_bits = GetTunnelBridgeDirection(tile) == DIAGDIR_NW ? 3 : 4;
break;
case RAIL_GROUND_FENCE_NE:
ground_bits = GetTunnelBridgeDirection(tile) == DIAGDIR_SW ? 5 : 4;
break;
case RAIL_GROUND_FENCE_SW:
ground_bits = 5;
break;
case RAIL_GROUND_FENCE_VERT1:
case RAIL_GROUND_FENCE_VERT2:
ground_bits = 6;
break;
case RAIL_GROUND_FENCE_HORIZ1:
case RAIL_GROUND_FENCE_HORIZ2:
ground_bits = 7;
break;
case RAIL_GROUND_ICE_DESERT:
ground_bits = 1;
break;
default:
NOT_REACHED();
}
return ground_bits;
}
static void TileLoop_TunnelBridge(TileIndex tile)
{
const uint8_t old_ground_bits = GetTunnelBridgeGroundBits(tile);
bool snow_or_desert = false;
switch (_settings_game.game_creation.landscape) {
case LT_ARCTIC: {
/* As long as we do not have a snow density, we want to use the density
* from the entry edge. For tunnels this is the lowest point for bridges the highest point.
* (Independent of foundations) */
int z = IsBridge(tile) ? GetTileMaxZ(tile) : GetTileZ(tile);
snow_or_desert = (z > GetSnowLine());
break;
}
case LT_TROPIC:
snow_or_desert = (GetTropicZone(tile) == TROPICZONE_DESERT);
break;
default:
break;
}
RailGroundType new_ground;
if (snow_or_desert) {
new_ground = RAIL_GROUND_ICE_DESERT;
} else {
new_ground = RAIL_GROUND_GRASS;
if (IsRailCustomBridgeHeadTile(tile) && old_ground_bits != 2) { // wait until bottom is green
/* determine direction of fence */
TrackBits rail = GetCustomBridgeHeadTrackBits(tile);
extern RailGroundType RailTrackToFence(TileIndex tile, TrackBits rail);
new_ground = RailTrackToFence(tile, rail);
}
}
uint8_t ground_bits = MapTunnelBridgeGroundTypeBits(tile, new_ground);
if (ground_bits != old_ground_bits) {
SetTunnelBridgeGroundBits(tile, ground_bits);
MarkTileDirtyByTile(tile);
}
}
static bool ClickTile_TunnelBridge(TileIndex tile)
{
if (_ctrl_pressed && IsTunnelBridgeWithSignalSimulation(tile)) {
TrackBits trackbits = TrackdirBitsToTrackBits(GetTileTrackdirBits(tile, TRANSPORT_RAIL, 0));
if (trackbits & TRACK_BIT_VERT) { // N-S direction
trackbits = (_tile_fract_coords.x <= _tile_fract_coords.y) ? TRACK_BIT_RIGHT : TRACK_BIT_LEFT;
}
if (trackbits & TRACK_BIT_HORZ) { // E-W direction
trackbits = (_tile_fract_coords.x + _tile_fract_coords.y <= 15) ? TRACK_BIT_UPPER : TRACK_BIT_LOWER;
}
Track track = FindFirstTrack(trackbits);
if (HasTrack(GetAcrossTunnelBridgeTrackBits(tile), track)) {
ShowTraceRestrictProgramWindow(tile, track);
return true;
}
}
/* Show vehicles found in tunnel. */
if (IsTunnelTile(tile)) {
int count = 0;
TileIndex tile_end = GetOtherTunnelBridgeEnd(tile);
for (const Train *t : Train::IterateFrontOnly()) {
if (!t->IsFrontEngine()) continue;
if (tile == t->tile || tile_end == t->tile) {
ShowVehicleViewWindow(t);
count++;
}
if (count > 19) break; // no more than 20 windows open
}
if (count > 0) return true;
}
return false;
}
extern const TrackBits _road_trackbits[16];
static TrackStatus GetTileTrackStatus_TunnelBridge(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
{
TransportType transport_type = GetTunnelBridgeTransportType(tile);
if (transport_type != mode || (transport_type == TRANSPORT_ROAD && !HasTileRoadType(tile, (RoadTramType)GB(sub_mode, 0, 8)))) return 0;
DiagDirection dir = GetTunnelBridgeDirection(tile);
if (side != INVALID_DIAGDIR && side == dir) return 0;
if (mode == TRANSPORT_ROAD && IsRoadCustomBridgeHeadTile(tile)) {
TrackBits bits = _road_trackbits[GetCustomBridgeHeadRoadBits(tile, (RoadTramType)GB(sub_mode, 0, 8))];
return CombineTrackStatus(TrackBitsToTrackdirBits(bits), TRACKDIR_BIT_NONE);
}
return CombineTrackStatus(TrackBitsToTrackdirBits(mode == TRANSPORT_RAIL ? GetTunnelBridgeTrackBits(tile) : DiagDirToDiagTrackBits(dir)), TRACKDIR_BIT_NONE);
}
static void UpdateRoadTunnelBridgeInfrastructure(TileIndex begin, TileIndex end, bool add) {
/* A full diagonal road has two road bits. */
const uint half_middle_len = GetTunnelBridgeLength(begin, end) * TUNNELBRIDGE_TRACKBIT_FACTOR;
const uint half_len = half_middle_len + (2 * TUNNELBRIDGE_TRACKBIT_FACTOR);
for (TileIndex t : { begin, end }) {
for (RoadTramType rtt : _roadtramtypes) {
RoadType rt = GetRoadType(t, rtt);
if (rt == INVALID_ROADTYPE) continue;
Company * const c = Company::GetIfValid(GetRoadOwner(t, rtt));
if (c != nullptr) {
uint infra = 0;
if (IsBridge(t)) {
const RoadBits bits = GetCustomBridgeHeadRoadBits(t, rtt);
infra += CountBits(bits) * TUNNELBRIDGE_TRACKBIT_FACTOR;
if (bits & DiagDirToRoadBits(GetTunnelBridgeDirection(t))) {
infra += half_middle_len;
}
} else {
infra += half_len;
}
if (add) {
c->infrastructure.road[rt] += infra;
} else {
c->infrastructure.road[rt] -= infra;
}
}
}
}
}
void AddRoadTunnelBridgeInfrastructure(TileIndex begin, TileIndex end) {
UpdateRoadTunnelBridgeInfrastructure(begin, end, true);
}
void SubtractRoadTunnelBridgeInfrastructure(TileIndex begin, TileIndex end) {
UpdateRoadTunnelBridgeInfrastructure(begin, end, false);
}
static void UpdateRailTunnelBridgeInfrastructure(Company *c, TileIndex begin, TileIndex end, bool add) {
const uint middle_len = GetTunnelBridgeLength(begin, end) * TUNNELBRIDGE_TRACKBIT_FACTOR;
if (c != nullptr) {
uint primary_count = middle_len + GetTunnelBridgeHeadOnlyPrimaryRailInfrastructureCount(begin) + GetTunnelBridgeHeadOnlyPrimaryRailInfrastructureCount(end);
if (add) {
c->infrastructure.rail[GetRailType(begin)] += primary_count;
} else {
c->infrastructure.rail[GetRailType(begin)] -= primary_count;
}
auto add_secondary_railtype = [&](TileIndex t) {
uint secondary_count = GetTunnelBridgeHeadOnlySecondaryRailInfrastructureCount(t);
if (secondary_count) {
if (add) {
c->infrastructure.rail[GetSecondaryRailType(t)] += secondary_count;
} else {
c->infrastructure.rail[GetSecondaryRailType(t)] -= secondary_count;
}
}
};
add_secondary_railtype(begin);
add_secondary_railtype(end);
if (IsTunnelBridgeWithSignalSimulation(begin)) {
if (add) {
c->infrastructure.signal += GetTunnelBridgeSignalSimulationSignalCount(begin, end);
} else {
c->infrastructure.signal -= GetTunnelBridgeSignalSimulationSignalCount(begin, end);
}
}
}
}
void AddRailTunnelBridgeInfrastructure(Company *c, TileIndex begin, TileIndex end) {
UpdateRailTunnelBridgeInfrastructure(c, begin, end, true);
}
void SubtractRailTunnelBridgeInfrastructure(Company *c, TileIndex begin, TileIndex end) {
UpdateRailTunnelBridgeInfrastructure(c, begin, end, false);
}
void AddRailTunnelBridgeInfrastructure(TileIndex begin, TileIndex end) {
UpdateRailTunnelBridgeInfrastructure(Company::GetIfValid(GetTileOwner(begin)), begin, end, true);
}
void SubtractRailTunnelBridgeInfrastructure(TileIndex begin, TileIndex end) {
UpdateRailTunnelBridgeInfrastructure(Company::GetIfValid(GetTileOwner(begin)), begin, end, false);
}
void SetTunnelBridgeSignalStyleExtended(TileIndex t, TileIndex end, uint8_t style)
{
if (IsTunnel(t)) {
SetTunnelSignalStyle(t, end, style);
} else {
SetBridgeSignalStyle(t, style);
SetBridgeSignalStyle(end, style);
}
}
static void ChangeTileOwner_TunnelBridge(TileIndex tile, Owner old_owner, Owner new_owner)
{
const TileIndex other_end = GetOtherTunnelBridgeEnd(tile);
const TransportType tt = GetTunnelBridgeTransportType(tile);
if (tt == TRANSPORT_ROAD && tile < other_end) {
/* Only execute this for one of the two ends */
SubtractRoadTunnelBridgeInfrastructure(tile, other_end);
for (RoadTramType rtt : _roadtramtypes) {
/* Update all roadtypes, no matter if they are present */
if (GetRoadOwner(tile, rtt) == old_owner) {
SetRoadOwner(tile, rtt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
}
if (GetRoadOwner(other_end, rtt) == old_owner) {
SetRoadOwner(other_end, rtt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
}
}
AddRoadTunnelBridgeInfrastructure(tile, other_end);
}
if (!IsTileOwner(tile, old_owner)) return;
/* Update company infrastructure counts for rail and water as well.
* No need to dirty windows here, we'll redraw the whole screen anyway. */
Company *old = Company::Get(old_owner);
if (tt == TRANSPORT_RAIL && tile < other_end) {
/* Only execute this for one of the two ends */
SubtractRailTunnelBridgeInfrastructure(old, tile, other_end);
if (new_owner != INVALID_OWNER) AddRailTunnelBridgeInfrastructure(Company::Get(new_owner), tile, other_end);
}
if (tt == TRANSPORT_WATER) {
/* Set number of pieces to zero if it's the southern tile as we
* don't want to update the infrastructure counts twice. */
const uint num_pieces = tile < other_end ? (GetTunnelBridgeLength(tile, other_end) + 2) * TUNNELBRIDGE_TRACKBIT_FACTOR : 0;
old->infrastructure.water -= num_pieces;
if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.water += num_pieces;
}
if (new_owner != INVALID_OWNER) {
SetTileOwner(tile, new_owner);
} else {
if (tt == TRANSPORT_RAIL) {
/* Since all of our vehicles have been removed, it is safe to remove the rail
* bridge / tunnel. */
[[maybe_unused]] CommandCost ret = DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
assert(ret.Succeeded());
} else {
/* In any other case, we can safely reassign the ownership to OWNER_NONE. */
SetTileOwner(tile, OWNER_NONE);
}
}
}
/**
* Helper to prepare the ground vehicle when entering a bridge. This get called
* when entering the bridge, at the last frame of travel on the bridge head.
* Our calling function gets called before UpdateInclination/UpdateZPosition,
* which normally controls the Z-coordinate. However, in the wormhole of the
* bridge the vehicle is in a strange state so UpdateInclination does not get
* called for the wormhole of the bridge and as such the going up/down bits
* would remain set. As such, this function clears those. In doing so, the call
* to UpdateInclination will not update the Z-coordinate, so that has to be
* done here as well.
* @param gv The ground vehicle entering the bridge.
*/
template
static void PrepareToEnterBridge(T *gv)
{
if (HasBit(gv->gv_flags, GVF_GOINGUP_BIT)) {
gv->z_pos++;
ClrBit(gv->gv_flags, GVF_GOINGUP_BIT);
} else {
ClrBit(gv->gv_flags, GVF_GOINGDOWN_BIT);
}
}
/**
* Frame when the 'enter tunnel' sound should be played. This is the second
* frame on a tile, so the sound is played shortly after entering the tunnel
* tile, while the vehicle is still visible.
*/
static const uint8_t TUNNEL_SOUND_FRAME = 1;
/**
* Frame when a vehicle should be hidden in a tunnel with a certain direction.
* This differs per direction, because of visibility / bounding box issues.
* Note that direction, in this case, is the direction leading into the tunnel.
* When entering a tunnel, hide the vehicle when it reaches the given frame.
* When leaving a tunnel, show the vehicle when it is one frame further
* to the 'outside', i.e. at (TILE_SIZE-1) - (frame) + 1
*/
extern const uint8_t _tunnel_visibility_frame[DIAGDIR_END] = {12, 8, 8, 12};
extern const uint8_t _tunnel_turnaround_pre_visibility_frame[DIAGDIR_END] = {31, 27, 27, 31};
static VehicleEnterTileStatus VehicleEnter_TunnelBridge(Vehicle *v, TileIndex tile, int x, int y)
{
/* Direction into the wormhole */
const DiagDirection dir = GetTunnelBridgeDirection(tile);
/* New position of the vehicle on the tile */
int pos = (DiagDirToAxis(dir) == AXIS_X ? x - (TileX(tile) * TILE_SIZE) : y - (TileY(tile) * TILE_SIZE));
/* Number of units moved by the vehicle since entering the tile */
int frame = (dir == DIAGDIR_NE || dir == DIAGDIR_NW) ? TILE_SIZE - 1 - pos : pos;
if (frame > (int) TILE_SIZE || frame < 0) return VETSB_CANNOT_ENTER;
if (frame == TILE_SIZE) {
TileIndexDiffC offset = TileIndexDiffCByDiagDir(ReverseDiagDir(dir));
x += offset.x;
y += offset.y;
}
int z = GetSlopePixelZ(x, y, true) - v->z_pos;
if (abs(z) > 2) return VETSB_CANNOT_ENTER;
if (IsTunnel(tile)) {
/* Direction of the vehicle */
const DiagDirection vdir = DirToDiagDir(v->direction);
if (v->type == VEH_TRAIN) {
Train *t = Train::From(v);
if (!(t->track & TRACK_BIT_WORMHOLE) && dir == vdir) {
if (t->IsFrontEngine() && frame == TUNNEL_SOUND_FRAME) {
if (!PlayVehicleSound(t, VSE_TUNNEL) && RailVehInfo(t->engine_type)->engclass == 0) {
SndPlayVehicleFx(SND_05_TRAIN_THROUGH_TUNNEL, v);
}
return VETSB_CONTINUE;
}
if (frame == _tunnel_visibility_frame[dir]) {
t->tile = tile;
t->track = TRACK_BIT_WORMHOLE;
if (Tunnel::GetByTile(tile)->is_chunnel) SetBit(t->gv_flags, GVF_CHUNNEL_BIT);
t->vehstatus |= VS_HIDDEN;
t->UpdateIsDrawn();
return VETSB_ENTERED_WORMHOLE;
}
}
if (dir == ReverseDiagDir(vdir) && frame == (int) (_tunnel_visibility_frame[dir] - 1) && z == 0) {
/* We're at the tunnel exit ?? */
if (t->tile != tile && GetOtherTunnelEnd(t->tile) != tile) return VETSB_CONTINUE; // In chunnel
t->tile = tile;
t->track = DiagDirToDiagTrackBits(vdir);
assert(t->track);
t->vehstatus &= ~VS_HIDDEN;
t->UpdateIsDrawn();
return VETSB_ENTERED_WORMHOLE;
}
} else if (v->type == VEH_ROAD) {
RoadVehicle *rv = RoadVehicle::From(v);
/* Enter tunnel? */
if (rv->state != RVSB_WORMHOLE && dir == vdir) {
if (frame == _tunnel_visibility_frame[dir]) {
/* Frame should be equal to the next frame number in the RV's movement */
assert_msg(frame == rv->frame + 1 || rv->frame == _tunnel_turnaround_pre_visibility_frame[dir],
"frame: %u, rv->frame: %u, dir: %u, _tunnel_turnaround_pre_visibility_frame[dir]: %u", frame, rv->frame, dir, _tunnel_turnaround_pre_visibility_frame[dir]);
rv->tile = tile;
rv->InvalidateImageCache();
rv->state = RVSB_WORMHOLE;
if (Tunnel::GetByTile(tile)->is_chunnel) SetBit(rv->gv_flags, GVF_CHUNNEL_BIT);
rv->vehstatus |= VS_HIDDEN;
rv->UpdateIsDrawn();
return VETSB_ENTERED_WORMHOLE;
} else {
return VETSB_CONTINUE;
}
}
/* We're at the tunnel exit ?? */
if (dir == ReverseDiagDir(vdir) && frame == (int) (_tunnel_visibility_frame[dir] - 1) && z == 0) {
if (rv->tile != tile && GetOtherTunnelEnd(rv->tile) != tile) return VETSB_CONTINUE; // In chunnel
rv->tile = tile;
rv->InvalidateImageCache();
rv->state = DiagDirToDiagTrackdir(vdir);
rv->frame = TILE_SIZE - (frame + 1);
rv->vehstatus &= ~VS_HIDDEN;
rv->UpdateIsDrawn();
return VETSB_ENTERED_WORMHOLE;
}
}
} else { // IsBridge(tile)
if (v->vehstatus & VS_HIDDEN) return VETSB_CONTINUE; // Building bridges between chunnel portals allowed.
if (v->type != VEH_SHIP) {
/* modify speed of vehicle */
uint16_t spd = GetBridgeSpec(GetBridgeType(tile))->speed;
if (v->type == VEH_ROAD) spd *= 2;
Vehicle *first = v->First();
first->cur_speed = std::min(first->cur_speed, spd);
}
const Direction bridge_dir = DiagDirToDir(dir);
if (v->direction == bridge_dir) {
switch (v->type) {
case VEH_TRAIN: {
/* Trains enter bridge at the first frame beyond this tile. */
if (frame != TILE_SIZE) return VETSB_CONTINUE;
Train *t = Train::From(v);
t->track = TRACK_BIT_WORMHOLE;
SetBit(t->First()->flags, VRF_CONSIST_SPEED_REDUCTION);
/* Do not call PrepareToEnterBridge because that also increments z_pos if
* GVF_GOINGUP_BIT is set.
* That is not required because this is occuring at frame == TILE_SIZE,
* instead at TILE_SIZE - 1 */
ClrBit(t->gv_flags, GVF_GOINGUP_BIT);
ClrBit(t->gv_flags, GVF_GOINGDOWN_BIT);
break;
}
case VEH_ROAD: {
/* Non-train vehicles enter bridge at the last frame inside this tile. */
if (frame != TILE_SIZE - 1) return VETSB_CONTINUE;
RoadVehicle *rv = RoadVehicle::From(v);
if (IsRoadCustomBridgeHeadTile(tile)) {
RoadBits bits = ROAD_NONE;
if (HasRoadTypeRoad(tile) && HasBit(rv->compatible_roadtypes, GetRoadTypeRoad(tile))) bits |= GetCustomBridgeHeadRoadBits(tile, RTT_ROAD);
if (HasRoadTypeTram(tile) && HasBit(rv->compatible_roadtypes, GetRoadTypeTram(tile))) bits |= GetCustomBridgeHeadRoadBits(tile, RTT_TRAM);
if (!(bits & DiagDirToRoadBits(GetTunnelBridgeDirection(tile)))) return VETSB_CONTINUE;
}
rv->InvalidateImageCache();
rv->state = RVSB_WORMHOLE;
PrepareToEnterBridge(rv);
break;
}
case VEH_SHIP:
/* Non-train vehicles enter bridge at the last frame inside this tile. */
if (frame != TILE_SIZE - 1) return VETSB_CONTINUE;
Ship::From(v)->state = TRACK_BIT_WORMHOLE;
break;
default: NOT_REACHED();
}
return VETSB_ENTERED_WORMHOLE;
} else if (v->direction == ReverseDir(bridge_dir)) {
switch (v->type) {
case VEH_TRAIN: {
Train *t = Train::From(v);
if (t->track & TRACK_BIT_WORMHOLE) {
if (IsRailCustomBridgeHeadTile(tile)) {
return VETSB_ENTERED_WORMHOLE;
} else {
v->tile = tile;
t->track = DiagDirToDiagTrackBits(DirToDiagDir(v->direction));
}
return VETSB_ENTERED_WORMHOLE;
}
break;
}
case VEH_ROAD: {
v->tile = tile;
RoadVehicle *rv = RoadVehicle::From(v);
if (rv->state == RVSB_WORMHOLE) {
rv->InvalidateImageCache();
rv->state = DiagDirToDiagTrackdir(DirToDiagDir(v->direction));
rv->frame = 0;
return VETSB_ENTERED_WORMHOLE;
}
break;
}
case VEH_SHIP: {
v->tile = tile;
Ship *ship = Ship::From(v);
if (ship->state == TRACK_BIT_WORMHOLE) {
ship->state = DiagDirToDiagTrackBits(DirToDiagDir(v->direction));
return VETSB_ENTERED_WORMHOLE;
}
break;
}
default: NOT_REACHED();
}
} else if (v->type == VEH_TRAIN && IsRailCustomBridgeHeadTile(tile)) {
DirDiff dir_diff = DirDifference(v->direction, bridge_dir);
DirDiff reverse_dir_diff = DirDifference(v->direction, ReverseDir(bridge_dir));
if (dir_diff == DIRDIFF_45RIGHT || dir_diff == DIRDIFF_45LEFT) {
if (frame != TILE_SIZE) return VETSB_CONTINUE;
Train *t = Train::From(v);
TileIndex other = GetOtherTunnelBridgeEnd(tile);
if (GetTunnelBridgeLength(tile, other) == 0 && IsRailCustomBridgeHead(other)) {
t->track |= TRACK_BIT_WORMHOLE;
} else {
t->direction = bridge_dir;
t->track = TRACK_BIT_WORMHOLE;
}
SetBit(t->First()->flags, VRF_CONSIST_SPEED_REDUCTION);
ClrBit(t->gv_flags, GVF_GOINGUP_BIT);
ClrBit(t->gv_flags, GVF_GOINGDOWN_BIT);
return VETSB_ENTERED_WORMHOLE;
}
if (reverse_dir_diff == DIRDIFF_45RIGHT || reverse_dir_diff == DIRDIFF_45LEFT) {
Train *t = Train::From(v);
if (t->track & TRACK_BIT_WORMHOLE) return VETSB_ENTERED_WORMHOLE;
}
}
}
return VETSB_CONTINUE;
}
static CommandCost TerraformTile_TunnelBridge(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
{
if (_settings_game.construction.build_on_slopes && AutoslopeEnabled() && IsBridge(tile) && GetTunnelBridgeTransportType(tile) != TRANSPORT_WATER) {
DiagDirection direction = GetTunnelBridgeDirection(tile);
Axis axis = DiagDirToAxis(direction);
CommandCost res;
auto [tileh_old, z_old] = GetTileSlopeZ(tile);
if (IsRoadCustomBridgeHeadTile(tile)) {
const RoadBits pieces = GetCustomBridgeHeadAllRoadBits(tile);
const RoadBits entrance_piece = DiagDirToRoadBits(direction);
/* Steep slopes behave the same as slopes with one corner raised. */
const Slope normalised_tileh_new = IsSteepSlope(tileh_new) ? SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh_new)) : tileh_new;
if ((_invalid_tileh_slopes_road[0][normalised_tileh_new & SLOPE_ELEVATED] & (pieces & ~entrance_piece)) != ROAD_NONE) {
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
}
if (IsRailCustomBridgeHeadTile(tile)) {
extern bool IsValidFlatRailBridgeHeadTrackBits(Slope normalised_slope, DiagDirection bridge_direction, TrackBits tracks);
/* Steep slopes behave the same as slopes with one corner raised. */
const Slope normalised_tileh_new = IsSteepSlope(tileh_new) ? SlopeWithOneCornerRaised(GetHighestSlopeCorner(tileh_new)) : tileh_new;
if (!IsValidFlatRailBridgeHeadTrackBits(normalised_tileh_new, direction, GetCustomBridgeHeadTrackBits(tile))) {
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
}
/* Check if new slope is valid for bridges in general (so we can safely call GetBridgeFoundation()) */
if ((direction == DIAGDIR_NW) || (direction == DIAGDIR_NE)) {
CheckBridgeSlope(BRIDGE_PIECE_SOUTH, axis, tileh_old, z_old);
res = CheckBridgeSlope(BRIDGE_PIECE_SOUTH, axis, tileh_new, z_new);
} else {
CheckBridgeSlope(BRIDGE_PIECE_NORTH, axis, tileh_old, z_old);
res = CheckBridgeSlope(BRIDGE_PIECE_NORTH, axis, tileh_new, z_new);
}
/* Surface slope is valid and remains unchanged? */
if (res.Succeeded() && (z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
}
return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
}
extern const TileTypeProcs _tile_type_tunnelbridge_procs = {
DrawTile_TunnelBridge, // draw_tile_proc
GetSlopePixelZ_TunnelBridge, // get_slope_z_proc
ClearTile_TunnelBridge, // clear_tile_proc
nullptr, // add_accepted_cargo_proc
GetTileDesc_TunnelBridge, // get_tile_desc_proc
GetTileTrackStatus_TunnelBridge, // get_tile_track_status_proc
ClickTile_TunnelBridge, // click_tile_proc
nullptr, // animate_tile_proc
TileLoop_TunnelBridge, // tile_loop_proc
ChangeTileOwner_TunnelBridge, // change_tile_owner_proc
nullptr, // add_produced_cargo_proc
VehicleEnter_TunnelBridge, // vehicle_enter_tile_proc
GetFoundation_TunnelBridge, // get_foundation_proc
TerraformTile_TunnelBridge, // terraform_tile_proc
};