author | peter1138 |
Sun, 03 Aug 2008 17:35:08 +0000 | |
changeset 9834 | 7474149531c1 |
parent 9309 | 7e9af4c58963 |
child 10331 | 3357af7bbe52 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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/** @file terraform_cmd.cpp Commands related to terraforming. */ |
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#include "stdafx.h" |
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#include "openttd.h" |
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#include "strings_type.h" |
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#include "command_func.h" |
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#include "tile_map.h" |
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#include "tunnel_map.h" |
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#include "bridge_map.h" |
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#include "variables.h" |
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#include "functions.h" |
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#include "economy_func.h" |
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#include "table/strings.h" |
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/* |
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* In one terraforming command all four corners of a initial tile can be raised/lowered (though this is not available to the player). |
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* The maximal amount of height modifications is archieved when raising a complete flat land from sea level to MAX_TILE_HEIGHT or vice versa. |
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* This affects all corners with a manhatten distance smaller than MAX_TILE_HEIGHT to one of the initial 4 corners. |
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* Their maximal amount is computed to 4 * \sum_{i=1}^{h_max} i = 2 * h_max * (h_max + 1). |
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*/ |
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static const int TERRAFORMER_MODHEIGHT_SIZE = 2 * MAX_TILE_HEIGHT * (MAX_TILE_HEIGHT + 1); |
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/* |
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* The maximal amount of affected tiles (i.e. the tiles that incident with one of the corners above, is computed similiar to |
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* 1 + 4 * \sum_{i=1}^{h_max} (i+1) = 1 + 2 * h_max + (h_max + 3). |
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*/ |
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static const int TERRAFORMER_TILE_TABLE_SIZE = 1 + 2 * MAX_TILE_HEIGHT * (MAX_TILE_HEIGHT + 3); |
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struct TerraformerHeightMod { |
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TileIndex tile; ///< Referenced tile. |
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byte height; ///< New TileHeight (height of north corner) of the tile. |
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}; |
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struct TerraformerState { |
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int modheight_count; ///< amount of entries in "modheight". |
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int tile_table_count; ///< amount of entries in "tile_table". |
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/** |
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* Dirty tiles, i.e.\ at least one corner changed. |
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* |
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* This array contains the tiles which are or will be marked as dirty. |
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* |
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* @ingroup dirty |
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*/ |
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TileIndex tile_table[TERRAFORMER_TILE_TABLE_SIZE]; |
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TerraformerHeightMod modheight[TERRAFORMER_MODHEIGHT_SIZE]; ///< Height modifications. |
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}; |
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TileIndex _terraform_err_tile; ///< first tile we couldn't terraform |
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/** |
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* Gets the TileHeight (height of north corner) of a tile as of current terraforming progress. |
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* |
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* @param ts TerraformerState. |
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* @param tile Tile. |
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* @return TileHeight. |
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*/ |
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static int TerraformGetHeightOfTile(const TerraformerState *ts, TileIndex tile) |
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{ |
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const TerraformerHeightMod *mod = ts->modheight; |
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for (int count = ts->modheight_count; count != 0; count--, mod++) { |
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if (mod->tile == tile) return mod->height; |
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} |
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/* TileHeight unchanged so far, read value from map. */ |
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return TileHeight(tile); |
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} |
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/** |
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* Stores the TileHeight (height of north corner) of a tile in a TerraformerState. |
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* |
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* @param ts TerraformerState. |
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* @param tile Tile. |
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* @param height New TileHeight. |
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*/ |
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static void TerraformSetHeightOfTile(TerraformerState *ts, TileIndex tile, int height) |
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{ |
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/* Find tile in the "modheight" table. |
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* Note: In a normal user-terraform command the tile will not be found in the "modheight" table. |
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* But during house- or industry-construction multiple corners can be terraformed at once. */ |
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TerraformerHeightMod *mod = ts->modheight; |
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int count = ts->modheight_count; |
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while ((count > 0) && (mod->tile != tile)) { |
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mod++; |
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count--; |
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} |
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/* New entry? */ |
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if (count == 0) { |
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assert(ts->modheight_count < TERRAFORMER_MODHEIGHT_SIZE); |
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ts->modheight_count++; |
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} |
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/* Finally store the new value */ |
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mod->tile = tile; |
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mod->height = (byte)height; |
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} |
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/** |
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* Adds a tile to the "tile_table" in a TerraformerState. |
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* |
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* @param ts TerraformerState. |
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* @param tile Tile. |
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109 |
* @ingroup dirty |
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110 |
*/ |
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static void TerraformAddDirtyTile(TerraformerState *ts, TileIndex tile) |
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{ |
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int count = ts->tile_table_count; |
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|
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for (TileIndex *t = ts->tile_table; count != 0; count--, t++) { |
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if (*t == tile) return; |
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} |
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118 |
|
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assert(ts->tile_table_count < TERRAFORMER_TILE_TABLE_SIZE); |
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120 |
|
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121 |
ts->tile_table[ts->tile_table_count++] = tile; |
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122 |
} |
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123 |
|
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124 |
/** |
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125 |
* Adds all tiles that incident with the north corner of a specific tile to the "tile_table" in a TerraformerState. |
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126 |
* |
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* @param ts TerraformerState. |
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* @param tile Tile. |
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129 |
* @ingroup dirty |
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130 |
*/ |
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static void TerraformAddDirtyTileAround(TerraformerState *ts, TileIndex tile) |
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{ |
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TerraformAddDirtyTile(ts, tile + TileDiffXY( 0, -1)); |
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TerraformAddDirtyTile(ts, tile + TileDiffXY(-1, -1)); |
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135 |
TerraformAddDirtyTile(ts, tile + TileDiffXY(-1, 0)); |
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TerraformAddDirtyTile(ts, tile); |
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137 |
} |
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138 |
|
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139 |
/** |
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140 |
* Terraform the north corner of a tile to a specific height. |
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141 |
* |
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* @param ts TerraformerState. |
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* @param tile Tile. |
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144 |
* @param height Aimed height. |
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* @param return Error code or cost. |
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146 |
*/ |
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static CommandCost TerraformTileHeight(TerraformerState *ts, TileIndex tile, int height) |
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{ |
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assert(tile < MapSize()); |
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150 |
|
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/* Check range of destination height */ |
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if (height < 0) return_cmd_error(STR_1003_ALREADY_AT_SEA_LEVEL); |
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if (height > MAX_TILE_HEIGHT) return_cmd_error(STR_1004_TOO_HIGH); |
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154 |
|
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/* |
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156 |
* Check if the terraforming has any effect. |
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* This can only be true, if multiple corners of the start-tile are terraformed (i.e. the terraforming is done by towns/industries etc.). |
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* In this case the terraforming should fail. (Don't know why.) |
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159 |
*/ |
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if (height == TerraformGetHeightOfTile(ts, tile)) return CMD_ERROR; |
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161 |
|
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/* Check "too close to edge of map" */ |
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uint x = TileX(tile); |
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uint y = TileY(tile); |
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if ((x <= 1) || (y <= 1) || (x >= MapMaxX() - 1) || (y >= MapMaxY() - 1)) { |
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/* |
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* Determine a sensible error tile |
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* Note: If x and y are both zero this will disable the error tile. (Tile 0 cannot be highlighted :( ) |
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*/ |
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if ((x == 1) && (y != 0)) x = 0; |
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if ((y == 1) && (x != 0)) y = 0; |
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_terraform_err_tile = TileXY(x, y); |
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return_cmd_error(STR_0002_TOO_CLOSE_TO_EDGE_OF_MAP); |
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174 |
} |
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175 |
|
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/* Mark incident tiles, that are involved in the terraforming */ |
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TerraformAddDirtyTileAround(ts, tile); |
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178 |
|
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/* Store the height modification */ |
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TerraformSetHeightOfTile(ts, tile, height); |
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181 |
|
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CommandCost total_cost(EXPENSES_CONSTRUCTION); |
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183 |
|
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184 |
/* Increment cost */ |
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total_cost.AddCost(_price.terraform); |
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186 |
|
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/* Recurse to neighboured corners if height difference is larger than 1 */ |
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{ |
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const TileIndexDiffC *ttm; |
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190 |
|
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static const TileIndexDiffC _terraform_tilepos[] = { |
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{ 1, 0}, // move to tile in SE |
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{-2, 0}, // undo last move, and move to tile in NW |
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{ 1, 1}, // undo last move, and move to tile in SW |
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{ 0, -2} // undo last move, and move to tile in NE |
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}; |
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197 |
|
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for (ttm = _terraform_tilepos; ttm != endof(_terraform_tilepos); ttm++) { |
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tile += ToTileIndexDiff(*ttm); |
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200 |
|
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201 |
/* Get TileHeight of neighboured tile as of current terraform progress */ |
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int r = TerraformGetHeightOfTile(ts, tile); |
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int height_diff = height - r; |
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204 |
|
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205 |
/* Is the height difference to the neighboured corner greater than 1? */ |
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if (abs(height_diff) > 1) { |
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/* Terraform the neighboured corner. The resulting height difference should be 1. */ |
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height_diff += (height_diff < 0 ? 1 : -1); |
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CommandCost cost = TerraformTileHeight(ts, tile, r + height_diff); |
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if (CmdFailed(cost)) return cost; |
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total_cost.AddCost(cost); |
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} |
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} |
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214 |
} |
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|
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return total_cost; |
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} |
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|
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/** Terraform land |
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* @param tile tile to terraform |
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* @param flags for this command type |
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* @param p1 corners to terraform (SLOPE_xxx) |
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* @param p2 direction; eg up (non-zero) or down (zero) |
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* @return error or cost of terraforming |
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*/ |
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CommandCost CmdTerraformLand(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) |
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{ |
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/* Make an extra check for map-bounds cause we add tiles to the originating tile */ |
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if (tile + TileDiffXY(1, 1) >= MapSize()) return CMD_ERROR; |
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|
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_terraform_err_tile = INVALID_TILE; |
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|
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CommandCost total_cost(EXPENSES_CONSTRUCTION); |
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int direction = (p2 != 0 ? 1 : -1); |
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TerraformerState ts; |
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|
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ts.modheight_count = ts.tile_table_count = 0; |
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|
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/* Compute the costs and the terraforming result in a model of the landscape */ |
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if ((p1 & SLOPE_W) != 0) { |
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TileIndex t = tile + TileDiffXY(1, 0); |
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CommandCost cost = TerraformTileHeight(&ts, t, TileHeight(t) + direction); |
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if (CmdFailed(cost)) return cost; |
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total_cost.AddCost(cost); |
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} |
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|
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if ((p1 & SLOPE_S) != 0) { |
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TileIndex t = tile + TileDiffXY(1, 1); |
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CommandCost cost = TerraformTileHeight(&ts, t, TileHeight(t) + direction); |
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if (CmdFailed(cost)) return cost; |
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total_cost.AddCost(cost); |
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} |
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|
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if ((p1 & SLOPE_E) != 0) { |
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TileIndex t = tile + TileDiffXY(0, 1); |
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CommandCost cost = TerraformTileHeight(&ts, t, TileHeight(t) + direction); |
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if (CmdFailed(cost)) return cost; |
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total_cost.AddCost(cost); |
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} |
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|
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if ((p1 & SLOPE_N) != 0) { |
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TileIndex t = tile + TileDiffXY(0, 0); |
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CommandCost cost = TerraformTileHeight(&ts, t, TileHeight(t) + direction); |
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if (CmdFailed(cost)) return cost; |
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total_cost.AddCost(cost); |
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} |
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|
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/* Check if the terraforming is valid wrt. tunnels, bridges and objects on the surface */ |
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{ |
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TileIndex *ti = ts.tile_table; |
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|
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for (int count = ts.tile_table_count; count != 0; count--, ti++) { |
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TileIndex tile = *ti; |
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|
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/* Find new heights of tile corners */ |
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uint z_N = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(0, 0)); |
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uint z_W = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(1, 0)); |
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uint z_S = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(1, 1)); |
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uint z_E = TerraformGetHeightOfTile(&ts, tile + TileDiffXY(0, 1)); |
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|
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/* Find min and max height of tile */ |
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uint z_min = min(min(z_N, z_W), min(z_S, z_E)); |
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uint z_max = max(max(z_N, z_W), max(z_S, z_E)); |
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|
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|
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/* Compute tile slope */ |
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Slope tileh = (z_max > z_min + 1 ? SLOPE_STEEP : SLOPE_FLAT); |
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if (z_W > z_min) tileh |= SLOPE_W; |
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if (z_S > z_min) tileh |= SLOPE_S; |
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if (z_E > z_min) tileh |= SLOPE_E; |
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if (z_N > z_min) tileh |= SLOPE_N; |
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|
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/* Check if bridge would take damage */ |
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if (direction == 1 && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile) && |
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GetBridgeHeight(GetSouthernBridgeEnd(tile)) <= z_max * TILE_HEIGHT) { |
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_terraform_err_tile = tile; // highlight the tile under the bridge |
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return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST); |
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} |
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/* Check if tunnel would take damage */ |
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|
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if (direction == -1 && IsTunnelInWay(tile, z_min * TILE_HEIGHT)) { |
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_terraform_err_tile = tile; // highlight the tile above the tunnel |
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return_cmd_error(STR_1002_EXCAVATION_WOULD_DAMAGE); |
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} |
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/* Check tiletype-specific things, and add extra-cost */ |
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const bool curr_gen = _generating_world; |
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if (_game_mode == GM_EDITOR) _generating_world = true; // used to create green terraformed land |
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CommandCost cost = _tile_type_procs[GetTileType(tile)]->terraform_tile_proc(tile, flags | DC_AUTO, z_min * TILE_HEIGHT, tileh); |
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_generating_world = curr_gen; |
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if (CmdFailed(cost)) { |
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_terraform_err_tile = tile; |
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return cost; |
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} |
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total_cost.AddCost(cost); |
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} |
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} |
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315 |
|
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if (flags & DC_EXEC) { |
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/* change the height */ |
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318 |
{ |
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319 |
int count; |
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320 |
TerraformerHeightMod *mod; |
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|
321 |
|
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322 |
mod = ts.modheight; |
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|
323 |
for (count = ts.modheight_count; count != 0; count--, mod++) { |
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|
324 |
TileIndex til = mod->tile; |
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|
325 |
|
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|
326 |
SetTileHeight(til, mod->height); |
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|
327 |
} |
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328 |
} |
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|
329 |
|
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|
330 |
/* finally mark the dirty tiles dirty */ |
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|
331 |
{ |
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|
332 |
int count; |
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|
333 |
TileIndex *ti = ts.tile_table; |
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|
334 |
for (count = ts.tile_table_count; count != 0; count--, ti++) { |
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|
335 |
MarkTileDirtyByTile(*ti); |
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|
336 |
} |
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|
337 |
} |
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|
338 |
} |
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|
339 |
return total_cost; |
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|
340 |
} |
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|
341 |
|
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changeset
|
342 |
|
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|
343 |
/** Levels a selected (rectangle) area of land |
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344 |
* @param tile end tile of area-drag |
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345 |
* @param flags for this command type |
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346 |
* @param p1 start tile of area drag |
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347 |
* @param p2 height difference; eg raise (+1), lower (-1) or level (0) |
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348 |
* @return error or cost of terraforming |
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|
349 |
*/ |
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|
350 |
CommandCost CmdLevelLand(TileIndex tile, uint32 flags, uint32 p1, uint32 p2) |
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|
351 |
{ |
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|
352 |
if (p1 >= MapSize()) return CMD_ERROR; |
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|
353 |
|
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|
354 |
/* remember level height */ |
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355 |
uint oldh = TileHeight(p1); |
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|
356 |
|
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|
357 |
/* compute new height */ |
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uint h = oldh + p2; |
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|
359 |
|
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|
360 |
/* Check range of destination height */ |
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|
361 |
if (h > MAX_TILE_HEIGHT) return_cmd_error((oldh == 0) ? STR_1003_ALREADY_AT_SEA_LEVEL : STR_1004_TOO_HIGH); |
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|
362 |
|
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|
363 |
/* make sure sx,sy are smaller than ex,ey */ |
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|
364 |
int ex = TileX(tile); |
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|
365 |
int ey = TileY(tile); |
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|
366 |
int sx = TileX(p1); |
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|
367 |
int sy = TileY(p1); |
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|
368 |
if (ex < sx) Swap(ex, sx); |
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|
369 |
if (ey < sy) Swap(ey, sy); |
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|
370 |
tile = TileXY(sx, sy); |
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|
371 |
|
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|
372 |
int size_x = ex - sx + 1; |
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int size_y = ey - sy + 1; |
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|
374 |
|
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|
375 |
Money money = GetAvailableMoneyForCommand(); |
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376 |
CommandCost cost(EXPENSES_CONSTRUCTION); |
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|
377 |
|
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|
378 |
BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) { |
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|
379 |
uint curh = TileHeight(tile2); |
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|
380 |
while (curh != h) { |
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|
381 |
CommandCost ret = DoCommand(tile2, SLOPE_N, (curh > h) ? 0 : 1, flags & ~DC_EXEC, CMD_TERRAFORM_LAND); |
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|
382 |
if (CmdFailed(ret)) break; |
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changeset
|
383 |
|
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|
384 |
if (flags & DC_EXEC) { |
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|
385 |
money -= ret.GetCost(); |
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|
386 |
if (money < 0) { |
8210
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parents:
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|
387 |
_additional_cash_required = ret.GetCost(); |
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parents:
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|
388 |
return cost; |
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|
389 |
} |
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parents:
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changeset
|
390 |
DoCommand(tile2, SLOPE_N, (curh > h) ? 0 : 1, flags, CMD_TERRAFORM_LAND); |
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|
391 |
} |
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parents:
diff
changeset
|
392 |
|
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diff
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|
393 |
cost.AddCost(ret); |
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parents:
diff
changeset
|
394 |
curh += (curh > h) ? -1 : 1; |
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parents:
diff
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|
395 |
} |
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parents:
diff
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|
396 |
} END_TILE_LOOP(tile2, size_x, size_y, tile) |
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parents:
diff
changeset
|
397 |
|
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parents:
diff
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|
398 |
return (cost.GetCost() == 0) ? CMD_ERROR : cost; |
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parents:
diff
changeset
|
399 |
} |