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Location: cpp/openttd-patchpack/source/src/terraform_cmd.cpp - annotation
r26913:e7b3d514fe34
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Revert 92c7551: Line drawing algorithm fix broke other cases (#10497)
This reverts commit 92c755161d6a467d33477bd0041fc720d7d9ba41.
This reverts commit 92c755161d6a467d33477bd0041fc720d7d9ba41.
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r8816:b6e9b77d418c r8816:b6e9b77d418c r26127:abb88237711d r8210:40db2b3d3085 r26118:2b515956558b r16982:4a4e85b95d1e r16982:4a4e85b95d1e r16982:4a4e85b95d1e r16982:4a4e85b95d1e r16982:4a4e85b95d1e r16982:4a4e85b95d1e r17044:5f3042af4747 r17044:5f3042af4747 r17044:5f3042af4747 r17044:5f3042af4747 r8210:40db2b3d3085 r8210:40db2b3d3085 r8210:40db2b3d3085 r8210:40db2b3d3085 r14884:b01d4ac9f626 r8210:40db2b3d3085 r16982:4a4e85b95d1e r16982:4a4e85b95d1e r12519:e52fcaadf579 r8210:40db2b3d3085 r26127:abb88237711d r26127:abb88237711d r8210:40db2b3d3085 | /*
* 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 terraform_cmd.cpp Commands related to terraforming. */
#include "stdafx.h"
#include "command_func.h"
#include "tunnel_map.h"
#include "bridge_map.h"
#include "viewport_func.h"
#include "genworld.h"
#include "object_base.h"
#include "company_base.h"
#include "company_func.h"
#include "core/backup_type.hpp"
#include "terraform_cmd.h"
#include "landscape_cmd.h"
#include "table/strings.h"
#include <map>
#include <set>
#include "safeguards.h"
/** Set of tiles. */
typedef std::set<TileIndex> TileIndexSet;
/** Mapping of tiles to their height. */
typedef std::map<TileIndex, int> TileIndexToHeightMap;
/** State of the terraforming. */
struct TerraformerState {
TileIndexSet dirty_tiles; ///< The tiles that need to be redrawn.
TileIndexToHeightMap tile_to_new_height; ///< The tiles for which the height has changed.
};
/**
* Gets the TileHeight (height of north corner) of a tile as of current terraforming progress.
*
* @param ts TerraformerState.
* @param tile Tile.
* @return TileHeight.
*/
static int TerraformGetHeightOfTile(const TerraformerState *ts, TileIndex tile)
{
TileIndexToHeightMap::const_iterator it = ts->tile_to_new_height.find(tile);
return it != ts->tile_to_new_height.end() ? it->second : TileHeight(tile);
}
/**
* Stores the TileHeight (height of north corner) of a tile in a TerraformerState.
*
* @param ts TerraformerState.
* @param tile Tile.
* @param height New TileHeight.
*/
static void TerraformSetHeightOfTile(TerraformerState *ts, TileIndex tile, int height)
{
ts->tile_to_new_height[tile] = height;
}
/**
* Adds a tile to the "tile_table" in a TerraformerState.
*
* @param ts TerraformerState.
* @param tile Tile.
* @ingroup dirty
*/
static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile)
{
ts->dirty_tiles.insert(tile);
}
/**
* Adds all tiles that incident with the north corner of a specific tile to the "tile_table" in a TerraformerState.
*
* @param ts TerraformerState.
* @param tile Tile.
* @ingroup dirty
*/
static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile)
{
/* Make sure all tiles passed to TerraformAddDirtyTile are within [0, Map::Size()] */
if (TileY(tile) >= 1) TerraformAddDirtyTile(ts, tile + TileDiffXY( 0, -1));
if (TileY(tile) >= 1 && TileX(tile) >= 1) TerraformAddDirtyTile(ts, tile + TileDiffXY(-1, -1));
if (TileX(tile) >= 1) TerraformAddDirtyTile(ts, tile + TileDiffXY(-1, 0));
TerraformAddDirtyTile(ts, tile);
}
/**
* Terraform the north corner of a tile to a specific height.
*
* @param ts TerraformerState.
* @param tile Tile.
* @param height Aimed height.
* @return Error code or cost.
*/
static std::tuple<CommandCost, TileIndex> TerraformTileHeight(TerraformerState *ts, TileIndex tile, int height)
{
assert(tile < Map::Size());
/* Check range of destination height */
if (height < 0) return { CommandCost(STR_ERROR_ALREADY_AT_SEA_LEVEL), INVALID_TILE };
if (height > _settings_game.construction.map_height_limit) return { CommandCost(STR_ERROR_TOO_HIGH), INVALID_TILE };
/*
* Check if the terraforming has any effect.
* This can only be true, if multiple corners of the start-tile are terraformed (i.e. the terraforming is done by towns/industries etc.).
* In this case the terraforming should fail. (Don't know why.)
*/
if (height == TerraformGetHeightOfTile(ts, tile)) return { CMD_ERROR, INVALID_TILE };
/* Check "too close to edge of map". Only possible when freeform-edges is off. */
uint x = TileX(tile);
uint y = TileY(tile);
if (!_settings_game.construction.freeform_edges && ((x <= 1) || (y <= 1) || (x >= Map::MaxX() - 1) || (y >= Map::MaxY() - 1))) {
/*
* Determine a sensible error tile
*/
if (x == 1) x = 0;
if (y == 1) y = 0;
return { CommandCost(STR_ERROR_TOO_CLOSE_TO_EDGE_OF_MAP), TileXY(x, y) };
}
/* Mark incident tiles that are involved in the terraforming. */
TerraformAddDirtyTileAround(ts, tile);
/* Store the height modification */
TerraformSetHeightOfTile(ts, tile, height);
CommandCost total_cost(EXPENSES_CONSTRUCTION);
/* Increment cost */
total_cost.AddCost(_price[PR_TERRAFORM]);
/* Recurse to neighboured corners if height difference is larger than 1 */
{
const TileIndexDiffC *ttm;
TileIndex orig_tile = tile;
static const TileIndexDiffC _terraform_tilepos[] = {
{ 1, 0}, // move to tile in SE
{-2, 0}, // undo last move, and move to tile in NW
{ 1, 1}, // undo last move, and move to tile in SW
{ 0, -2} // undo last move, and move to tile in NE
};
for (ttm = _terraform_tilepos; ttm != endof(_terraform_tilepos); ttm++) {
tile += ToTileIndexDiff(*ttm);
if (tile >= Map::Size()) continue;
/* Make sure we don't wrap around the map */
if (Delta(TileX(orig_tile), TileX(tile)) == Map::SizeX() - 1) continue;
if (Delta(TileY(orig_tile), TileY(tile)) == Map::SizeY() - 1) continue;
/* Get TileHeight of neighboured tile as of current terraform progress */
int r = TerraformGetHeightOfTile(ts, tile);
int height_diff = height - r;
/* Is the height difference to the neighboured corner greater than 1? */
if (abs(height_diff) > 1) {
/* Terraform the neighboured corner. The resulting height difference should be 1. */
height_diff += (height_diff < 0 ? 1 : -1);
auto [cost, err_tile] = TerraformTileHeight(ts, tile, r + height_diff);
if (cost.Failed()) return { cost, err_tile };
total_cost.AddCost(cost);
}
}
}
return { total_cost, INVALID_TILE };
}
/**
* Terraform land
* @param flags for this command type
* @param tile tile to terraform
* @param slope corners to terraform (SLOPE_xxx)
* @param dir_up direction; eg up (true) or down (false)
* @return the cost of this operation or an error
*/
std::tuple<CommandCost, Money, TileIndex> CmdTerraformLand(DoCommandFlag flags, TileIndex tile, Slope slope, bool dir_up)
{
CommandCost total_cost(EXPENSES_CONSTRUCTION);
int direction = (dir_up ? 1 : -1);
TerraformerState ts;
/* Compute the costs and the terraforming result in a model of the landscape */
if ((slope & SLOPE_W) != 0 && tile + TileDiffXY(1, 0) < Map::Size()) {
TileIndex t = tile + TileDiffXY(1, 0);
auto [cost, err_tile] = TerraformTileHeight(&ts, t, TileHeight(t) + direction);
if (cost.Failed()) return { cost, 0, err_tile };
total_cost.AddCost(cost);
}
if ((slope & SLOPE_S) != 0 && tile + TileDiffXY(1, 1) < Map::Size()) {
TileIndex t = tile + TileDiffXY(1, 1);
auto [cost, err_tile] = TerraformTileHeight(&ts, t, TileHeight(t) + direction);
if (cost.Failed()) return { cost, 0, err_tile };
total_cost.AddCost(cost);
}
if ((slope & SLOPE_E) != 0 && tile + TileDiffXY(0, 1) < Map::Size()) {
TileIndex t = tile + TileDiffXY(0, 1);
auto [cost, err_tile] = TerraformTileHeight(&ts, t, TileHeight(t) + direction);
if (cost.Failed()) return { cost, 0, err_tile };
total_cost.AddCost(cost);
}
if ((slope & SLOPE_N) != 0) {
TileIndex t = tile + TileDiffXY(0, 0);
auto [cost, err_tile] = TerraformTileHeight(&ts, t, TileHeight(t) + direction);
if (cost.Failed()) return { cost, 0, err_tile };
total_cost.AddCost(cost);
}
/* Check if the terraforming is valid wrt. tunnels, bridges and objects on the surface
* Pass == 0: Collect tileareas which are caused to be auto-cleared.
* Pass == 1: Collect the actual cost. */
for (int pass = 0; pass < 2; pass++) {
for (TileIndexSet::const_iterator it = ts.dirty_tiles.begin(); it != ts.dirty_tiles.end(); it++) {
TileIndex t = *it;
assert(t < Map::Size());
/* MP_VOID tiles can be terraformed but as tunnels and bridges
* cannot go under / over these tiles they don't need checking. */
if (IsTileType(t, MP_VOID)) continue;
/* Find new heights of tile corners */
int z_N = TerraformGetHeightOfTile(&ts, t + TileDiffXY(0, 0));
int z_W = TerraformGetHeightOfTile(&ts, t + TileDiffXY(1, 0));
int z_S = TerraformGetHeightOfTile(&ts, t + TileDiffXY(1, 1));
int z_E = TerraformGetHeightOfTile(&ts, t + TileDiffXY(0, 1));
/* Find min and max height of tile */
int z_min = std::min({z_N, z_W, z_S, z_E});
int z_max = std::max({z_N, z_W, z_S, z_E});
/* Compute tile slope */
Slope tileh = (z_max > z_min + 1 ? SLOPE_STEEP : SLOPE_FLAT);
if (z_W > z_min) tileh |= SLOPE_W;
if (z_S > z_min) tileh |= SLOPE_S;
if (z_E > z_min) tileh |= SLOPE_E;
if (z_N > z_min) tileh |= SLOPE_N;
if (pass == 0) {
/* Check if bridge would take damage */
if (IsBridgeAbove(t)) {
int bridge_height = GetBridgeHeight(GetSouthernBridgeEnd(t));
/* Check if bridge would take damage. */
if (direction == 1 && bridge_height <= z_max) {
return { CommandCost(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST), 0, t }; // highlight the tile under the bridge
}
/* Is the bridge above not too high afterwards? */
if (direction == -1 && bridge_height > (z_min + _settings_game.construction.max_bridge_height)) {
return { CommandCost(STR_ERROR_BRIDGE_TOO_HIGH_AFTER_LOWER_LAND), 0, t };
}
}
/* Check if tunnel would take damage */
if (direction == -1 && IsTunnelInWay(t, z_min)) {
return { CommandCost(STR_ERROR_EXCAVATION_WOULD_DAMAGE), 0, t }; // highlight the tile above the tunnel
}
}
/* Is the tile already cleared? */
const ClearedObjectArea *coa = FindClearedObject(t);
bool indirectly_cleared = coa != nullptr && coa->first_tile != t;
/* Check tiletype-specific things, and add extra-cost */
Backup<bool> old_generating_world(_generating_world, FILE_LINE);
if (_game_mode == GM_EDITOR) old_generating_world.Change(true); // used to create green terraformed land
DoCommandFlag tile_flags = flags | DC_AUTO | DC_FORCE_CLEAR_TILE;
if (pass == 0) {
tile_flags &= ~DC_EXEC;
tile_flags |= DC_NO_MODIFY_TOWN_RATING;
}
CommandCost cost;
if (indirectly_cleared) {
cost = Command<CMD_LANDSCAPE_CLEAR>::Do(tile_flags, t);
} else {
cost = _tile_type_procs[GetTileType(t)]->terraform_tile_proc(t, tile_flags, z_min, tileh);
}
old_generating_world.Restore();
if (cost.Failed()) {
return { cost, 0, t };
}
if (pass == 1) total_cost.AddCost(cost);
}
}
Company *c = Company::GetIfValid(_current_company);
if (c != nullptr && GB(c->terraform_limit, 16, 16) < ts.tile_to_new_height.size()) {
return { CommandCost(STR_ERROR_TERRAFORM_LIMIT_REACHED), 0, INVALID_TILE };
}
if (flags & DC_EXEC) {
/* Mark affected areas dirty. */
for (TileIndexSet::const_iterator it = ts.dirty_tiles.begin(); it != ts.dirty_tiles.end(); it++) {
MarkTileDirtyByTile(*it);
TileIndexToHeightMap::const_iterator new_height = ts.tile_to_new_height.find(*it);
if (new_height == ts.tile_to_new_height.end()) continue;
MarkTileDirtyByTile(*it, 0, new_height->second);
}
/* change the height */
for (TileIndexToHeightMap::const_iterator it = ts.tile_to_new_height.begin();
it != ts.tile_to_new_height.end(); it++) {
TileIndex t = it->first;
int height = it->second;
SetTileHeight(t, (uint)height);
}
if (c != nullptr) c->terraform_limit -= (uint32)ts.tile_to_new_height.size() << 16;
}
return { total_cost, 0, total_cost.Succeeded() ? tile : INVALID_TILE };
}
/**
* Levels a selected (rectangle) area of land
* @param flags for this command type
* @param tile end tile of area-drag
* @param start_tile start tile of area drag
* @param diagonal Whether to use the Orthogonal (false) or Diagonal (true) iterator.
* @param LevelMode Mode of leveling \c LevelMode.
* @return the cost of this operation or an error
*/
std::tuple<CommandCost, Money, TileIndex> CmdLevelLand(DoCommandFlag flags, TileIndex tile, TileIndex start_tile, bool diagonal, LevelMode lm)
{
if (start_tile >= Map::Size()) return { CMD_ERROR, 0, INVALID_TILE };
/* remember level height */
uint oldh = TileHeight(start_tile);
/* compute new height */
uint h = oldh;
switch (lm) {
case LM_LEVEL: break;
case LM_RAISE: h++; break;
case LM_LOWER: h--; break;
default: return { CMD_ERROR, 0, INVALID_TILE };
}
/* Check range of destination height */
if (h > _settings_game.construction.map_height_limit) return { CommandCost(oldh == 0 ? STR_ERROR_ALREADY_AT_SEA_LEVEL : STR_ERROR_TOO_HIGH), 0, INVALID_TILE };
Money money = GetAvailableMoneyForCommand();
CommandCost cost(EXPENSES_CONSTRUCTION);
CommandCost last_error(lm == LM_LEVEL ? STR_ERROR_ALREADY_LEVELLED : INVALID_STRING_ID);
bool had_success = false;
const Company *c = Company::GetIfValid(_current_company);
int limit = (c == nullptr ? INT32_MAX : GB(c->terraform_limit, 16, 16));
if (limit == 0) return { CommandCost(STR_ERROR_TERRAFORM_LIMIT_REACHED), 0, INVALID_TILE };
TileIndex error_tile = INVALID_TILE;
std::unique_ptr<TileIterator> iter = TileIterator::Create(tile, start_tile, diagonal);
for (; *iter != INVALID_TILE; ++(*iter)) {
TileIndex t = *iter;
uint curh = TileHeight(t);
while (curh != h) {
CommandCost ret;
std::tie(ret, std::ignore, error_tile) = Command<CMD_TERRAFORM_LAND>::Do(flags & ~DC_EXEC, t, SLOPE_N, curh <= h);
if (ret.Failed()) {
last_error = ret;
/* Did we reach the limit? */
if (ret.GetErrorMessage() == STR_ERROR_TERRAFORM_LIMIT_REACHED) limit = 0;
break;
}
if (flags & DC_EXEC) {
money -= ret.GetCost();
if (money < 0) {
return { cost, ret.GetCost(), error_tile };
}
Command<CMD_TERRAFORM_LAND>::Do(flags, t, SLOPE_N, curh <= h);
} else {
/* When we're at the terraform limit we better bail (unneeded) testing as well.
* This will probably cause the terraforming cost to be underestimated, but only
* when it's near the terraforming limit. Even then, the estimation is
* completely off due to it basically counting terraforming double, so it being
* cut off earlier might even give a better estimate in some cases. */
if (--limit <= 0) {
had_success = true;
break;
}
}
cost.AddCost(ret);
curh += (curh > h) ? -1 : 1;
had_success = true;
}
if (limit <= 0) break;
}
CommandCost cc_ret = had_success ? cost : last_error;
return { cc_ret, 0, cc_ret.Succeeded() ? tile : error_tile };
}
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