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Location: cpp/openttd-patchpack/source/src/ai/api/ai_road.cpp - annotation
r14363:db29028f5824
21.2 KiB
text/x-c
(svn r18930) -Fix: [NoAI] Autoreplace is also valid for the default group.
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/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file ai_road.cpp Implementation of AIRoad. */
#include "ai_map.hpp"
#include "ai_station.hpp"
#include "ai_cargo.hpp"
#include "../../station_base.h"
#include "../../command_type.h"
#include "../../company_func.h"
#include "../../script/squirrel_helper_type.hpp"
/* static */ AIRoad::RoadVehicleType AIRoad::GetRoadVehicleTypeForCargo(CargoID cargo_type)
{
return AICargo::HasCargoClass(cargo_type, AICargo::CC_PASSENGERS) ? ROADVEHTYPE_BUS : ROADVEHTYPE_TRUCK;
}
/* static */ bool AIRoad::IsRoadTile(TileIndex tile)
{
if (!::IsValidTile(tile)) return false;
return (::IsTileType(tile, MP_ROAD) && ::GetRoadTileType(tile) != ROAD_TILE_DEPOT) ||
IsDriveThroughRoadStationTile(tile);
}
/* static */ bool AIRoad::IsRoadDepotTile(TileIndex tile)
{
if (!::IsValidTile(tile)) return false;
return ::IsTileType(tile, MP_ROAD) && ::GetRoadTileType(tile) == ROAD_TILE_DEPOT &&
(::RoadTypeToRoadTypes((::RoadType)GetCurrentRoadType()) & ::GetRoadTypes(tile)) != 0;
}
/* static */ bool AIRoad::IsRoadStationTile(TileIndex tile)
{
if (!::IsValidTile(tile)) return false;
return ::IsRoadStopTile(tile) && (::RoadTypeToRoadTypes((::RoadType)GetCurrentRoadType()) & ::GetRoadTypes(tile)) != 0;
}
/* static */ bool AIRoad::IsDriveThroughRoadStationTile(TileIndex tile)
{
if (!::IsValidTile(tile)) return false;
return ::IsDriveThroughStopTile(tile) && (::RoadTypeToRoadTypes((::RoadType)GetCurrentRoadType()) & ::GetRoadTypes(tile)) != 0;
}
/* static */ bool AIRoad::IsRoadTypeAvailable(RoadType road_type)
{
return ::HasRoadTypesAvail(_current_company, ::RoadTypeToRoadTypes((::RoadType)road_type));
}
/* static */ AIRoad::RoadType AIRoad::GetCurrentRoadType()
{
return (RoadType)AIObject::GetRoadType();
}
/* static */ void AIRoad::SetCurrentRoadType(RoadType road_type)
{
if (!IsRoadTypeAvailable(road_type)) return;
AIObject::SetRoadType((::RoadType)road_type);
}
/* static */ bool AIRoad::HasRoadType(TileIndex tile, RoadType road_type)
{
if (!AIMap::IsValidTile(tile)) return false;
if (!IsRoadTypeAvailable(road_type)) return false;
return ::GetAnyRoadBits(tile, (::RoadType)road_type, false) != ROAD_NONE;
}
/* static */ bool AIRoad::AreRoadTilesConnected(TileIndex t1, TileIndex t2)
{
if (!::IsValidTile(t1)) return false;
if (!::IsValidTile(t2)) return false;
if (!IsRoadTypeAvailable(GetCurrentRoadType())) return false;
/* Tiles not neighbouring */
if ((abs((int)::TileX(t1) - (int)::TileX(t2)) + abs((int)::TileY(t1) - (int)::TileY(t2))) != 1) return false;
RoadBits r1 = ::GetAnyRoadBits(t1, AIObject::GetRoadType());
RoadBits r2 = ::GetAnyRoadBits(t2, AIObject::GetRoadType());
uint dir_1 = (::TileX(t1) == ::TileX(t2)) ? (::TileY(t1) < ::TileY(t2) ? 2 : 0) : (::TileX(t1) < ::TileX(t2) ? 1 : 3);
uint dir_2 = 2 ^ dir_1;
DisallowedRoadDirections drd2 = IsNormalRoadTile(t2) ? GetDisallowedRoadDirections(t2) : DRD_NONE;
return HasBit(r1, dir_1) && HasBit(r2, dir_2) && drd2 != DRD_BOTH && drd2 != (dir_1 > dir_2 ? DRD_SOUTHBOUND : DRD_NORTHBOUND);
}
/* Helper functions for AIRoad::CanBuildConnectedRoadParts(). */
/**
* Check whether the given existing bits the start and end part can be build.
* As the function assumes the bits being build on a slope that does not
* allow level foundations all of the existing parts will always be in
* a straight line. This also needs to hold for the start and end parts,
* otherwise it is for sure not valid. Finally a check will be done to
* determine whether the existing road parts match the to-be-build parts.
* As they can only be placed in one direction, just checking the start
* part with the first existing part is enough.
* @param existing The existing road parts.
* @param start The part that should be build first.
* @param end The part that will be build second.
* @return True if and only if the road bits can be build.
*/
static bool CheckAutoExpandedRoadBits(const Array *existing, int32 start, int32 end)
{
return (start + end == 0) && (existing->size == 0 || existing->array[0] == start || existing->array[0] == end);
}
/**
* Lookup function for building road parts when building on slopes is disabled.
* @param slope The slope of the tile to examine.
* @param existing The existing road parts.
* @param start The part that should be build first.
* @param end The part that will be build second.
* @return 0 when the build parts do not connect, 1 when they do connect once
* they are build or 2 when building the first part automatically
* builds the second part.
*/
static int32 LookupWithoutBuildOnSlopes(::Slope slope, const Array *existing, int32 start, int32 end)
{
switch (slope) {
/* Flat slopes can always be build. */
case SLOPE_FLAT:
return 1;
/* Only 4 of the slopes can be build upon. Testing the existing bits is
* necessary because these bits can be something else when the settings
* in the game have been changed.
*/
case SLOPE_NE: case SLOPE_SW:
return (CheckAutoExpandedRoadBits(existing, start, end) && (start == 1 || end == 1)) ? (existing->size == 0 ? 2 : 1) : 0;
case SLOPE_SE: case SLOPE_NW:
return (CheckAutoExpandedRoadBits(existing, start, end) && (start != 1 && end != 1)) ? (existing->size == 0 ? 2 : 1) : 0;
/* Any other tile cannot be built on. */
default:
return 0;
}
}
/**
* Rotate a neighbour bit a single time clockwise.
* @param neighbour The neighbour.
* @return The rotate neighbour data.
*/
static int32 RotateNeighbour(int32 neighbour)
{
switch (neighbour) {
case -2: return -1;
case -1: return 2;
case 1: return -2;
case 2: return 1;
default: NOT_REACHED();
}
}
/**
* Convert a neighbour to a road bit representation for easy internal use.
* @param neighbour The neighbour.
* @return The bits representing the direction.
*/
static RoadBits NeighbourToRoadBits(int32 neighbour)
{
switch (neighbour) {
case -2: return ROAD_NW;
case -1: return ROAD_NE;
case 2: return ROAD_SE;
case 1: return ROAD_SW;
default: NOT_REACHED();
}
}
/**
* Lookup function for building road parts when building on slopes is enabled.
* @param slope The slope of the tile to examine.
* @param existing The existing neighbours.
* @param start The part that should be build first.
* @param end The part that will be build second.
* @return 0 when the build parts do not connect, 1 when they do connect once
* they are build or 2 when building the first part automatically
* builds the second part.
*/
static int32 LookupWithBuildOnSlopes(::Slope slope, Array *existing, int32 start, int32 end)
{
if (::IsSteepSlope(slope)) {
switch (slope) {
/* On steep slopes one can only build straight roads that will be
* automatically expanded to a straight road. Just check that the existing
* road parts are in the same direction. */
case SLOPE_STEEP_S:
case SLOPE_STEEP_W:
case SLOPE_STEEP_N:
case SLOPE_STEEP_E:
return CheckAutoExpandedRoadBits(existing, start, end) ? (existing->size == 0 ? 2 : 1) : 0;
/* All other slopes are invalid slopes!. */
default:
return -1;
}
}
/* The slope is not steep. Furthermore lots of slopes are generally the
* same but are only rotated. So to reduce the amount of lookup work that
* needs to be done the data is made uniform. This means rotating the
* existing parts and updating the slope. */
static const ::Slope base_slopes[] = {
SLOPE_FLAT, SLOPE_W, SLOPE_W, SLOPE_SW,
SLOPE_W, SLOPE_EW, SLOPE_SW, SLOPE_WSE,
SLOPE_W, SLOPE_SW, SLOPE_EW, SLOPE_WSE,
SLOPE_SW, SLOPE_WSE, SLOPE_WSE};
static const byte base_rotates[] = {0, 0, 1, 0, 2, 0, 1, 0, 3, 3, 2, 3, 2, 2, 1};
if (slope >= (::Slope)lengthof(base_slopes)) {
/* This slope is an invalid slope, so ignore it. */
return -1;
}
byte base_rotate = base_rotates[slope];
slope = base_slopes[slope];
/* Some slopes don't need rotating, so return early when we know we do
* not need to rotate. */
switch (slope) {
case SLOPE_FLAT:
/* Flat slopes can always be build. */
return 1;
case SLOPE_EW:
case SLOPE_WSE:
/* A slope similar to a SLOPE_EW or SLOPE_WSE will always cause
* foundations which makes them accessible from all sides. */
return 1;
case SLOPE_W:
case SLOPE_SW:
/* A slope for which we need perform some calculations. */
break;
default:
/* An invalid slope. */
return -1;
}
/* Now perform the actual rotation. */
for (int j = 0; j < base_rotate; j++) {
for (int i = 0; i < existing->size; i++) {
existing->array[i] = RotateNeighbour(existing->array[i]);
}
start = RotateNeighbour(start);
end = RotateNeighbour(end);
}
/* Create roadbits out of the data for easier handling. */
RoadBits start_roadbits = NeighbourToRoadBits(start);
RoadBits new_roadbits = start_roadbits | NeighbourToRoadBits(end);
RoadBits existing_roadbits = ROAD_NONE;
for (int i = 0; i < existing->size; i++) {
existing_roadbits |= NeighbourToRoadBits(existing->array[i]);
}
switch (slope) {
case SLOPE_W:
/* A slope similar to a SLOPE_W. */
switch (new_roadbits) {
case ROAD_N:
case ROAD_E:
case ROAD_S:
/* Cannot build anything with a turn from the low side. */
return 0;
case ROAD_X:
case ROAD_Y:
/* A 'sloped' tile is going to be build. */
if ((existing_roadbits | new_roadbits) != new_roadbits) {
/* There is already a foundation on the tile, or at least
* another slope that is not compatible with the new one. */
return 0;
}
/* If the start is in the low part, it is automatically
* building the second part too. */
return ((start_roadbits & ROAD_E) && !(existing_roadbits & ROAD_W)) ? 2 : 1;
default:
/* Roadbits causing a foundation are going to be build.
* When the existing roadbits are slopes (the lower bits
* are used), this cannot be done. */
if ((existing_roadbits | new_roadbits) == new_roadbits) return 1;
return (existing_roadbits & ROAD_E) ? 0 : 1;
}
case SLOPE_SW:
/* A slope similar to a SLOPE_SW. */
switch (new_roadbits) {
case ROAD_N:
case ROAD_E:
/* Cannot build anything with a turn from the low side. */
return 0;
case ROAD_X:
/* A 'sloped' tile is going to be build. */
if ((existing_roadbits | new_roadbits) != new_roadbits) {
/* There is already a foundation on the tile, or at least
* another slope that is not compatible with the new one. */
return 0;
}
/* If the start is in the low part, it is automatically
* building the second part too. */
return ((start_roadbits & ROAD_NE) && !(existing_roadbits & ROAD_SW)) ? 2 : 1;
default:
/* Roadbits causing a foundation are going to be build.
* When the existing roadbits are slopes (the lower bits
* are used), this cannot be done. */
return (existing_roadbits & ROAD_NE) ? 0 : 1;
}
default:
NOT_REACHED();
}
}
/**
* Normalise all input data so we can easily handle it without needing
* to call the API lots of times or create large if-elseif-elseif-else
* constructs.
* In this case it means that a TileXY(0, -1) becomes -2 and TileXY(0, 1)
* becomes 2. TileXY(-1, 0) and TileXY(1, 0) stay respectively -1 and 1.
* Any other value means that it is an invalid tile offset.
* @param tile The tile to normalise.
* @return True if and only if the tile offset is valid.
*/
static bool NormaliseTileOffset(int32 *tile)
{
if (*tile == 1 || *tile == -1) return true;
if (*tile == ::TileDiffXY(0, -1)) {
*tile = -2;
return true;
}
if (*tile == ::TileDiffXY(0, 1)) {
*tile = 2;
return true;
}
return false;
}
/* static */ int32 AIRoad::CanBuildConnectedRoadParts(AITile::Slope slope_, Array *existing, TileIndex start_, TileIndex end_)
{
::Slope slope = (::Slope)slope_;
int32 start = start_;
int32 end = end_;
/* The start tile and end tile cannot be the same tile either. */
if (start == end) return -1;
for (int i = 0; i < existing->size; i++) {
if (!NormaliseTileOffset(&existing->array[i])) return -1;
}
if (!NormaliseTileOffset(&start)) return -1;
if (!NormaliseTileOffset(&end)) return -1;
/* Without build on slopes the characteristics are vastly different, so use
* a different helper function (one that is much simpler). */
return _settings_game.construction.build_on_slopes ? LookupWithBuildOnSlopes(slope, existing, start, end) : LookupWithoutBuildOnSlopes(slope, existing, start, end);
}
/* static */ int32 AIRoad::CanBuildConnectedRoadPartsHere(TileIndex tile, TileIndex start, TileIndex end)
{
if (!::IsValidTile(tile) || !::IsValidTile(start) || !::IsValidTile(end)) return -1;
if (::DistanceManhattan(tile, start) != 1 || ::DistanceManhattan(tile, end) != 1) return -1;
/* ROAD_NW ROAD_SW ROAD_SE ROAD_NE */
static const TileIndex neighbours[] = {::TileDiffXY(0, -1), ::TileDiffXY(1, 0), ::TileDiffXY(0, 1), ::TileDiffXY(-1, 0)};
Array *existing = (Array*)alloca(sizeof(Array) + lengthof(neighbours) * sizeof(int32));
existing->size = 0;
::RoadBits rb = ::ROAD_NONE;
if (::IsNormalRoadTile(tile)) {
rb = ::GetAllRoadBits(tile);
} else {
for (::RoadType rt = ::ROADTYPE_BEGIN; rt < ::ROADTYPE_END; rt++) rb |= ::GetAnyRoadBits(tile, rt);
}
for (uint i = 0; i < lengthof(neighbours); i++) {
if (HasBit(rb, i)) existing->array[existing->size++] = neighbours[i];
}
return AIRoad::CanBuildConnectedRoadParts(AITile::GetSlope(tile), existing, start - tile, end - tile);
}
/**
* Check whether one can reach (possibly by building) a road piece the center
* of the neighbouring tile. This includes roads and (drive through) stations.
* @param rts The road type we want to know reachability for
* @param start_tile The tile to "enter" the neighbouring tile.
* @param neighbour The direction to the neighbouring tile to "enter".
* @return true if and only if the tile is reachable.
*/
static bool NeighbourHasReachableRoad(::RoadTypes rts, TileIndex start_tile, DiagDirection neighbour)
{
TileIndex neighbour_tile = ::TileAddByDiagDir(start_tile, neighbour);
if ((rts & ::GetRoadTypes(neighbour_tile)) == 0) return false;
switch (::GetTileType(neighbour_tile)) {
case MP_ROAD:
return (::GetRoadTileType(neighbour_tile) != ROAD_TILE_DEPOT);
case MP_STATION:
if (::IsDriveThroughStopTile(neighbour_tile)) {
return (::DiagDirToAxis(neighbour) == ::DiagDirToAxis(::GetRoadStopDir(neighbour_tile)));
}
return false;
default:
return false;
}
}
/* static */ int32 AIRoad::GetNeighbourRoadCount(TileIndex tile)
{
if (!::IsValidTile(tile)) return false;
if (!IsRoadTypeAvailable(GetCurrentRoadType())) return false;
::RoadTypes rts = ::RoadTypeToRoadTypes((::RoadType)GetCurrentRoadType());
int32 neighbour = 0;
if (TileX(tile) > 0 && NeighbourHasReachableRoad(rts, tile, DIAGDIR_NE)) neighbour++;
if (NeighbourHasReachableRoad(rts, tile, DIAGDIR_SE)) neighbour++;
if (NeighbourHasReachableRoad(rts, tile, DIAGDIR_SW)) neighbour++;
if (TileY(tile) > 0 && NeighbourHasReachableRoad(rts, tile, DIAGDIR_NW)) neighbour++;
return neighbour;
}
/* static */ TileIndex AIRoad::GetRoadDepotFrontTile(TileIndex depot)
{
if (!IsRoadDepotTile(depot)) return INVALID_TILE;
return depot + ::TileOffsByDiagDir(::GetRoadDepotDirection(depot));
}
/* static */ TileIndex AIRoad::GetRoadStationFrontTile(TileIndex station)
{
if (!IsRoadStationTile(station)) return INVALID_TILE;
return station + ::TileOffsByDiagDir(::GetRoadStopDir(station));
}
/* static */ TileIndex AIRoad::GetDriveThroughBackTile(TileIndex station)
{
if (!IsDriveThroughRoadStationTile(station)) return INVALID_TILE;
return station + ::TileOffsByDiagDir(::ReverseDiagDir(::GetRoadStopDir(station)));
}
/* static */ bool AIRoad::_BuildRoadInternal(TileIndex start, TileIndex end, bool one_way, bool full)
{
EnforcePrecondition(false, start != end);
EnforcePrecondition(false, ::IsValidTile(start));
EnforcePrecondition(false, ::IsValidTile(end));
EnforcePrecondition(false, ::TileX(start) == ::TileX(end) || ::TileY(start) == ::TileY(end));
EnforcePrecondition(false, !one_way || AIObject::GetRoadType() == ::ROADTYPE_ROAD);
EnforcePrecondition(false, IsRoadTypeAvailable(GetCurrentRoadType()));
return AIObject::DoCommand(start, end, (::TileY(start) != ::TileY(end) ? 4 : 0) | (((start < end) == !full) ? 1 : 2) | (AIObject::GetRoadType() << 3) | ((one_way ? 1 : 0) << 5), CMD_BUILD_LONG_ROAD);
}
/* static */ bool AIRoad::BuildRoad(TileIndex start, TileIndex end)
{
return _BuildRoadInternal(start, end, false, false);
}
/* static */ bool AIRoad::BuildOneWayRoad(TileIndex start, TileIndex end)
{
return _BuildRoadInternal(start, end, true, false);
}
/* static */ bool AIRoad::BuildRoadFull(TileIndex start, TileIndex end)
{
return _BuildRoadInternal(start, end, false, true);
}
/* static */ bool AIRoad::BuildOneWayRoadFull(TileIndex start, TileIndex end)
{
return _BuildRoadInternal(start, end, true, true);
}
/* static */ bool AIRoad::BuildRoadDepot(TileIndex tile, TileIndex front)
{
EnforcePrecondition(false, tile != front);
EnforcePrecondition(false, ::IsValidTile(tile));
EnforcePrecondition(false, ::IsValidTile(front));
EnforcePrecondition(false, ::TileX(tile) == ::TileX(front) || ::TileY(tile) == ::TileY(front));
EnforcePrecondition(false, IsRoadTypeAvailable(GetCurrentRoadType()));
uint entrance_dir = (::TileX(tile) == ::TileX(front)) ? (::TileY(tile) < ::TileY(front) ? 1 : 3) : (::TileX(tile) < ::TileX(front) ? 2 : 0);
return AIObject::DoCommand(tile, entrance_dir | (AIObject::GetRoadType() << 2), 0, CMD_BUILD_ROAD_DEPOT);
}
/* static */ bool AIRoad::_BuildRoadStationInternal(TileIndex tile, TileIndex front, RoadVehicleType road_veh_type, bool drive_through, StationID station_id)
{
EnforcePrecondition(false, tile != front);
EnforcePrecondition(false, ::IsValidTile(tile));
EnforcePrecondition(false, ::IsValidTile(front));
EnforcePrecondition(false, ::TileX(tile) == ::TileX(front) || ::TileY(tile) == ::TileY(front));
EnforcePrecondition(false, station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id));
EnforcePrecondition(false, road_veh_type == ROADVEHTYPE_BUS || road_veh_type == ROADVEHTYPE_TRUCK);
EnforcePrecondition(false, IsRoadTypeAvailable(GetCurrentRoadType()));
uint entrance_dir;
if (drive_through) {
entrance_dir = ::TileY(tile) != ::TileY(front);
} else {
entrance_dir = (::TileX(tile) == ::TileX(front)) ? (::TileY(tile) < ::TileY(front) ? 1 : 3) : (::TileX(tile) < ::TileX(front) ? 2 : 0);
}
uint p2 = station_id == AIStation::STATION_JOIN_ADJACENT ? 0 : 32;
p2 |= drive_through ? 2 : 0;
p2 |= road_veh_type == ROADVEHTYPE_TRUCK ? 1 : 0;
p2 |= ::RoadTypeToRoadTypes(AIObject::GetRoadType()) << 2;
p2 |= (AIStation::IsValidStation(station_id) ? station_id : INVALID_STATION) << 16;
return AIObject::DoCommand(tile, entrance_dir, p2, CMD_BUILD_ROAD_STOP);
}
/* static */ bool AIRoad::BuildRoadStation(TileIndex tile, TileIndex front, RoadVehicleType road_veh_type, StationID station_id)
{
return _BuildRoadStationInternal(tile, front, road_veh_type, false, station_id);
}
/* static */ bool AIRoad::BuildDriveThroughRoadStation(TileIndex tile, TileIndex front, RoadVehicleType road_veh_type, StationID station_id)
{
return _BuildRoadStationInternal(tile, front, road_veh_type, true, station_id);
}
/* static */ bool AIRoad::RemoveRoad(TileIndex start, TileIndex end)
{
EnforcePrecondition(false, ::IsValidTile(start));
EnforcePrecondition(false, ::IsValidTile(end));
EnforcePrecondition(false, ::TileX(start) == ::TileX(end) || ::TileY(start) == ::TileY(end));
EnforcePrecondition(false, IsRoadTypeAvailable(GetCurrentRoadType()));
return AIObject::DoCommand(end, start, (::TileY(start) != ::TileY(end) ? 4 : 0) | (start < end ? 1 : 2) | (AIObject::GetRoadType() << 3), CMD_REMOVE_LONG_ROAD);
}
/* static */ bool AIRoad::RemoveRoadFull(TileIndex start, TileIndex end)
{
EnforcePrecondition(false, ::IsValidTile(start));
EnforcePrecondition(false, ::IsValidTile(end));
EnforcePrecondition(false, ::TileX(start) == ::TileX(end) || ::TileY(start) == ::TileY(end));
EnforcePrecondition(false, IsRoadTypeAvailable(GetCurrentRoadType()));
return AIObject::DoCommand(end, start, (::TileY(start) != ::TileY(end) ? 4 : 0) | (start < end ? 2 : 1) | (AIObject::GetRoadType() << 3), CMD_REMOVE_LONG_ROAD);
}
/* static */ bool AIRoad::RemoveRoadDepot(TileIndex tile)
{
EnforcePrecondition(false, ::IsValidTile(tile));
EnforcePrecondition(false, IsTileType(tile, MP_ROAD))
EnforcePrecondition(false, GetRoadTileType(tile) == ROAD_TILE_DEPOT);
return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
}
/* static */ bool AIRoad::RemoveRoadStation(TileIndex tile)
{
EnforcePrecondition(false, ::IsValidTile(tile));
EnforcePrecondition(false, IsTileType(tile, MP_STATION));
EnforcePrecondition(false, IsRoadStop(tile));
return AIObject::DoCommand(tile, 0, GetRoadStopType(tile), CMD_REMOVE_ROAD_STOP);
}
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