landscape.cpp

Go to the documentation of this file.
00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00014 #include "stdafx.h"
00015 #include "heightmap.h"
00016 #include "clear_map.h"
00017 #include "spritecache.h"
00018 #include "viewport_func.h"
00019 #include "command_func.h"
00020 #include "landscape.h"
00021 #include "void_map.h"
00022 #include "tgp.h"
00023 #include "genworld.h"
00024 #include "fios.h"
00025 #include "date_func.h"
00026 #include "water.h"
00027 #include "effectvehicle_func.h"
00028 #include "landscape_type.h"
00029 #include "animated_tile_func.h"
00030 #include "core/random_func.hpp"
00031 #include "object_base.h"
00032 #include "water_map.h"
00033 #include "economy_func.h"
00034 #include "company_func.h"
00035 
00036 #include "table/strings.h"
00037 #include "table/sprites.h"
00038 
00039 extern const TileTypeProcs
00040   _tile_type_clear_procs,
00041   _tile_type_rail_procs,
00042   _tile_type_road_procs,
00043   _tile_type_town_procs,
00044   _tile_type_trees_procs,
00045   _tile_type_station_procs,
00046   _tile_type_water_procs,
00047   _tile_type_void_procs,
00048   _tile_type_industry_procs,
00049   _tile_type_tunnelbridge_procs,
00050   _tile_type_object_procs;
00051 
00057 const TileTypeProcs * const _tile_type_procs[16] = {
00058   &_tile_type_clear_procs,        
00059   &_tile_type_rail_procs,         
00060   &_tile_type_road_procs,         
00061   &_tile_type_town_procs,         
00062   &_tile_type_trees_procs,        
00063   &_tile_type_station_procs,      
00064   &_tile_type_water_procs,        
00065   &_tile_type_void_procs,         
00066   &_tile_type_industry_procs,     
00067   &_tile_type_tunnelbridge_procs, 
00068   &_tile_type_object_procs,       
00069 };
00070 
00072 extern const byte _slope_to_sprite_offset[32] = {
00073   0, 1, 2, 3, 4, 5, 6,  7, 8, 9, 10, 11, 12, 13, 14, 0,
00074   0, 0, 0, 0, 0, 0, 0, 16, 0, 0,  0, 17,  0, 15, 18, 0,
00075 };
00076 
00085 static SnowLine *_snow_line = NULL;
00086 
00095 uint ApplyFoundationToSlope(Foundation f, Slope *s)
00096 {
00097   if (!IsFoundation(f)) return 0;
00098 
00099   if (IsLeveledFoundation(f)) {
00100     uint dz = TILE_HEIGHT + (IsSteepSlope(*s) ? TILE_HEIGHT : 0);
00101     *s = SLOPE_FLAT;
00102     return dz;
00103   }
00104 
00105   if (f != FOUNDATION_STEEP_BOTH && IsNonContinuousFoundation(f)) {
00106     *s = HalftileSlope(*s, GetHalftileFoundationCorner(f));
00107     return 0;
00108   }
00109 
00110   if (IsSpecialRailFoundation(f)) {
00111     *s = SlopeWithThreeCornersRaised(OppositeCorner(GetRailFoundationCorner(f)));
00112     return 0;
00113   }
00114 
00115   uint dz = IsSteepSlope(*s) ? TILE_HEIGHT : 0;
00116   Corner highest_corner = GetHighestSlopeCorner(*s);
00117 
00118   switch (f) {
00119     case FOUNDATION_INCLINED_X:
00120       *s = (((highest_corner == CORNER_W) || (highest_corner == CORNER_S)) ? SLOPE_SW : SLOPE_NE);
00121       break;
00122 
00123     case FOUNDATION_INCLINED_Y:
00124       *s = (((highest_corner == CORNER_S) || (highest_corner == CORNER_E)) ? SLOPE_SE : SLOPE_NW);
00125       break;
00126 
00127     case FOUNDATION_STEEP_LOWER:
00128       *s = SlopeWithOneCornerRaised(highest_corner);
00129       break;
00130 
00131     case FOUNDATION_STEEP_BOTH:
00132       *s = HalftileSlope(SlopeWithOneCornerRaised(highest_corner), highest_corner);
00133       break;
00134 
00135     default: NOT_REACHED();
00136   }
00137   return dz;
00138 }
00139 
00140 
00148 uint GetPartialZ(int x, int y, Slope corners)
00149 {
00150   if (IsHalftileSlope(corners)) {
00151     switch (GetHalftileSlopeCorner(corners)) {
00152       case CORNER_W:
00153         if (x - y >= 0) return GetSlopeMaxZ(corners);
00154         break;
00155 
00156       case CORNER_S:
00157         if (x - (y ^ 0xF) >= 0) return GetSlopeMaxZ(corners);
00158         break;
00159 
00160       case CORNER_E:
00161         if (y - x >= 0) return GetSlopeMaxZ(corners);
00162         break;
00163 
00164       case CORNER_N:
00165         if ((y ^ 0xF) - x >= 0) return GetSlopeMaxZ(corners);
00166         break;
00167 
00168       default: NOT_REACHED();
00169     }
00170   }
00171 
00172   int z = 0;
00173 
00174   switch (RemoveHalftileSlope(corners)) {
00175     case SLOPE_W:
00176       if (x - y >= 0) {
00177         z = (x - y) >> 1;
00178       }
00179       break;
00180 
00181     case SLOPE_S:
00182       y ^= 0xF;
00183       if ((x - y) >= 0) {
00184         z = (x - y) >> 1;
00185       }
00186       break;
00187 
00188     case SLOPE_SW:
00189       z = (x >> 1) + 1;
00190       break;
00191 
00192     case SLOPE_E:
00193       if (y - x >= 0) {
00194         z = (y - x) >> 1;
00195       }
00196       break;
00197 
00198     case SLOPE_EW:
00199     case SLOPE_NS:
00200     case SLOPE_ELEVATED:
00201       z = 4;
00202       break;
00203 
00204     case SLOPE_SE:
00205       z = (y >> 1) + 1;
00206       break;
00207 
00208     case SLOPE_WSE:
00209       z = 8;
00210       y ^= 0xF;
00211       if (x - y < 0) {
00212         z += (x - y) >> 1;
00213       }
00214       break;
00215 
00216     case SLOPE_N:
00217       y ^= 0xF;
00218       if (y - x >= 0) {
00219         z = (y - x) >> 1;
00220       }
00221       break;
00222 
00223     case SLOPE_NW:
00224       z = (y ^ 0xF) >> 1;
00225       break;
00226 
00227     case SLOPE_NWS:
00228       z = 8;
00229       if (x - y < 0) {
00230         z += (x - y) >> 1;
00231       }
00232       break;
00233 
00234     case SLOPE_NE:
00235       z = (x ^ 0xF) >> 1;
00236       break;
00237 
00238     case SLOPE_ENW:
00239       z = 8;
00240       y ^= 0xF;
00241       if (y - x < 0) {
00242         z += (y - x) >> 1;
00243       }
00244       break;
00245 
00246     case SLOPE_SEN:
00247       z = 8;
00248       if (y - x < 0) {
00249         z += (y - x) >> 1;
00250       }
00251       break;
00252 
00253     case SLOPE_STEEP_S:
00254       z = 1 + ((x + y) >> 1);
00255       break;
00256 
00257     case SLOPE_STEEP_W:
00258       z = 1 + ((x + (y ^ 0xF)) >> 1);
00259       break;
00260 
00261     case SLOPE_STEEP_N:
00262       z = 1 + (((x ^ 0xF) + (y ^ 0xF)) >> 1);
00263       break;
00264 
00265     case SLOPE_STEEP_E:
00266       z = 1 + (((x ^ 0xF) + y) >> 1);
00267       break;
00268 
00269     default: break;
00270   }
00271 
00272   return z;
00273 }
00274 
00275 uint GetSlopeZ(int x, int y)
00276 {
00277   TileIndex tile = TileVirtXY(x, y);
00278 
00279   return _tile_type_procs[GetTileType(tile)]->get_slope_z_proc(tile, x, y);
00280 }
00281 
00291 int GetSlopeZInCorner(Slope tileh, Corner corner)
00292 {
00293   assert(!IsHalftileSlope(tileh));
00294   return ((tileh & SlopeWithOneCornerRaised(corner)) != 0 ? TILE_HEIGHT : 0) + (tileh == SteepSlope(corner) ? TILE_HEIGHT : 0);
00295 }
00296 
00309 void GetSlopeZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2)
00310 {
00311   static const Slope corners[4][4] = {
00312     /*    corner     |          steep slope
00313      *  z1      z2   |       z1             z2        */
00314     {SLOPE_E, SLOPE_N, SLOPE_STEEP_E, SLOPE_STEEP_N}, // DIAGDIR_NE, z1 = E, z2 = N
00315     {SLOPE_S, SLOPE_E, SLOPE_STEEP_S, SLOPE_STEEP_E}, // DIAGDIR_SE, z1 = S, z2 = E
00316     {SLOPE_S, SLOPE_W, SLOPE_STEEP_S, SLOPE_STEEP_W}, // DIAGDIR_SW, z1 = S, z2 = W
00317     {SLOPE_W, SLOPE_N, SLOPE_STEEP_W, SLOPE_STEEP_N}, // DIAGDIR_NW, z1 = W, z2 = N
00318   };
00319 
00320   int halftile_test = (IsHalftileSlope(tileh) ? SlopeWithOneCornerRaised(GetHalftileSlopeCorner(tileh)) : 0);
00321   if (halftile_test == corners[edge][0]) *z2 += TILE_HEIGHT; // The slope is non-continuous in z2. z2 is on the upper side.
00322   if (halftile_test == corners[edge][1]) *z1 += TILE_HEIGHT; // The slope is non-continuous in z1. z1 is on the upper side.
00323 
00324   if ((tileh & corners[edge][0]) != 0) *z1 += TILE_HEIGHT; // z1 is raised
00325   if ((tileh & corners[edge][1]) != 0) *z2 += TILE_HEIGHT; // z2 is raised
00326   if (RemoveHalftileSlope(tileh) == corners[edge][2]) *z1 += TILE_HEIGHT; // z1 is highest corner of a steep slope
00327   if (RemoveHalftileSlope(tileh) == corners[edge][3]) *z2 += TILE_HEIGHT; // z2 is highest corner of a steep slope
00328 }
00329 
00338 Slope GetFoundationSlope(TileIndex tile, uint *z)
00339 {
00340   Slope tileh = GetTileSlope(tile, z);
00341   Foundation f = _tile_type_procs[GetTileType(tile)]->get_foundation_proc(tile, tileh);
00342   uint z_inc = ApplyFoundationToSlope(f, &tileh);
00343   if (z != NULL) *z += z_inc;
00344   return tileh;
00345 }
00346 
00347 
00348 bool HasFoundationNW(TileIndex tile, Slope slope_here, uint z_here)
00349 {
00350   uint z;
00351 
00352   int z_W_here = z_here;
00353   int z_N_here = z_here;
00354   GetSlopeZOnEdge(slope_here, DIAGDIR_NW, &z_W_here, &z_N_here);
00355 
00356   Slope slope = GetFoundationSlope(TILE_ADDXY(tile, 0, -1), &z);
00357   int z_W = z;
00358   int z_N = z;
00359   GetSlopeZOnEdge(slope, DIAGDIR_SE, &z_W, &z_N);
00360 
00361   return (z_N_here > z_N) || (z_W_here > z_W);
00362 }
00363 
00364 
00365 bool HasFoundationNE(TileIndex tile, Slope slope_here, uint z_here)
00366 {
00367   uint z;
00368 
00369   int z_E_here = z_here;
00370   int z_N_here = z_here;
00371   GetSlopeZOnEdge(slope_here, DIAGDIR_NE, &z_E_here, &z_N_here);
00372 
00373   Slope slope = GetFoundationSlope(TILE_ADDXY(tile, -1, 0), &z);
00374   int z_E = z;
00375   int z_N = z;
00376   GetSlopeZOnEdge(slope, DIAGDIR_SW, &z_E, &z_N);
00377 
00378   return (z_N_here > z_N) || (z_E_here > z_E);
00379 }
00380 
00386 void DrawFoundation(TileInfo *ti, Foundation f)
00387 {
00388   if (!IsFoundation(f)) return;
00389 
00390   /* Two part foundations must be drawn separately */
00391   assert(f != FOUNDATION_STEEP_BOTH);
00392 
00393   uint sprite_block = 0;
00394   uint z;
00395   Slope slope = GetFoundationSlope(ti->tile, &z);
00396 
00397   /* Select the needed block of foundations sprites
00398    * Block 0: Walls at NW and NE edge
00399    * Block 1: Wall  at        NE edge
00400    * Block 2: Wall  at NW        edge
00401    * Block 3: No walls at NW or NE edge
00402    */
00403   if (!HasFoundationNW(ti->tile, slope, z)) sprite_block += 1;
00404   if (!HasFoundationNE(ti->tile, slope, z)) sprite_block += 2;
00405 
00406   /* Use the original slope sprites if NW and NE borders should be visible */
00407   SpriteID leveled_base = (sprite_block == 0 ? (int)SPR_FOUNDATION_BASE : (SPR_SLOPES_VIRTUAL_BASE + sprite_block * SPR_TRKFOUND_BLOCK_SIZE));
00408   SpriteID inclined_base = SPR_SLOPES_VIRTUAL_BASE + SPR_SLOPES_INCLINED_OFFSET + sprite_block * SPR_TRKFOUND_BLOCK_SIZE;
00409   SpriteID halftile_base = SPR_HALFTILE_FOUNDATION_BASE + sprite_block * SPR_HALFTILE_BLOCK_SIZE;
00410 
00411   if (IsSteepSlope(ti->tileh)) {
00412     if (!IsNonContinuousFoundation(f)) {
00413       /* Lower part of foundation */
00414       AddSortableSpriteToDraw(
00415         leveled_base + (ti->tileh & ~SLOPE_STEEP), PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z
00416       );
00417     }
00418 
00419     Corner highest_corner = GetHighestSlopeCorner(ti->tileh);
00420     ti->z += ApplyFoundationToSlope(f, &ti->tileh);
00421 
00422     if (IsInclinedFoundation(f)) {
00423       /* inclined foundation */
00424       byte inclined = highest_corner * 2 + (f == FOUNDATION_INCLINED_Y ? 1 : 0);
00425 
00426       AddSortableSpriteToDraw(inclined_base + inclined, PAL_NONE, ti->x, ti->y,
00427         f == FOUNDATION_INCLINED_X ? 16 : 1,
00428         f == FOUNDATION_INCLINED_Y ? 16 : 1,
00429         TILE_HEIGHT, ti->z
00430       );
00431       OffsetGroundSprite(31, 9);
00432     } else if (IsLeveledFoundation(f)) {
00433       AddSortableSpriteToDraw(leveled_base + SlopeWithOneCornerRaised(highest_corner), PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z - TILE_HEIGHT);
00434       OffsetGroundSprite(31, 1);
00435     } else if (f == FOUNDATION_STEEP_LOWER) {
00436       /* one corner raised */
00437       OffsetGroundSprite(31, 1);
00438     } else {
00439       /* halftile foundation */
00440       int x_bb = (((highest_corner == CORNER_W) || (highest_corner == CORNER_S)) ? 8 : 0);
00441       int y_bb = (((highest_corner == CORNER_S) || (highest_corner == CORNER_E)) ? 8 : 0);
00442 
00443       AddSortableSpriteToDraw(halftile_base + highest_corner, PAL_NONE, ti->x + x_bb, ti->y + y_bb, 8, 8, 7, ti->z + TILE_HEIGHT);
00444       OffsetGroundSprite(31, 9);
00445     }
00446   } else {
00447     if (IsLeveledFoundation(f)) {
00448       /* leveled foundation */
00449       AddSortableSpriteToDraw(leveled_base + ti->tileh, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
00450       OffsetGroundSprite(31, 1);
00451     } else if (IsNonContinuousFoundation(f)) {
00452       /* halftile foundation */
00453       Corner halftile_corner = GetHalftileFoundationCorner(f);
00454       int x_bb = (((halftile_corner == CORNER_W) || (halftile_corner == CORNER_S)) ? 8 : 0);
00455       int y_bb = (((halftile_corner == CORNER_S) || (halftile_corner == CORNER_E)) ? 8 : 0);
00456 
00457       AddSortableSpriteToDraw(halftile_base + halftile_corner, PAL_NONE, ti->x + x_bb, ti->y + y_bb, 8, 8, 7, ti->z);
00458       OffsetGroundSprite(31, 9);
00459     } else if (IsSpecialRailFoundation(f)) {
00460       /* anti-zig-zag foundation */
00461       SpriteID spr;
00462       if (ti->tileh == SLOPE_NS || ti->tileh == SLOPE_EW) {
00463         /* half of leveled foundation under track corner */
00464         spr = leveled_base + SlopeWithThreeCornersRaised(GetRailFoundationCorner(f));
00465       } else {
00466         /* tile-slope = sloped along X/Y, foundation-slope = three corners raised */
00467         spr = inclined_base + 2 * GetRailFoundationCorner(f) + ((ti->tileh == SLOPE_SW || ti->tileh == SLOPE_NE) ? 1 : 0);
00468       }
00469       AddSortableSpriteToDraw(spr, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
00470       OffsetGroundSprite(31, 9);
00471     } else {
00472       /* inclined foundation */
00473       byte inclined = GetHighestSlopeCorner(ti->tileh) * 2 + (f == FOUNDATION_INCLINED_Y ? 1 : 0);
00474 
00475       AddSortableSpriteToDraw(inclined_base + inclined, PAL_NONE, ti->x, ti->y,
00476         f == FOUNDATION_INCLINED_X ? 16 : 1,
00477         f == FOUNDATION_INCLINED_Y ? 16 : 1,
00478         TILE_HEIGHT, ti->z
00479       );
00480       OffsetGroundSprite(31, 9);
00481     }
00482     ti->z += ApplyFoundationToSlope(f, &ti->tileh);
00483   }
00484 }
00485 
00486 void DoClearSquare(TileIndex tile)
00487 {
00488   /* If the tile can have animation and we clear it, delete it from the animated tile list. */
00489   if (_tile_type_procs[GetTileType(tile)]->animate_tile_proc != NULL) DeleteAnimatedTile(tile);
00490 
00491   MakeClear(tile, CLEAR_GRASS, _generating_world ? 3 : 0);
00492   MarkTileDirtyByTile(tile);
00493 }
00494 
00505 TrackStatus GetTileTrackStatus(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
00506 {
00507   return _tile_type_procs[GetTileType(tile)]->get_tile_track_status_proc(tile, mode, sub_mode, side);
00508 }
00509 
00516 void ChangeTileOwner(TileIndex tile, Owner old_owner, Owner new_owner)
00517 {
00518   _tile_type_procs[GetTileType(tile)]->change_tile_owner_proc(tile, old_owner, new_owner);
00519 }
00520 
00521 void GetTileDesc(TileIndex tile, TileDesc *td)
00522 {
00523   _tile_type_procs[GetTileType(tile)]->get_tile_desc_proc(tile, td);
00524 }
00525 
00531 bool IsSnowLineSet()
00532 {
00533   return _snow_line != NULL;
00534 }
00535 
00541 void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS])
00542 {
00543   _snow_line = CallocT<SnowLine>(1);
00544   _snow_line->lowest_value = 0xFF;
00545   memcpy(_snow_line->table, table, sizeof(_snow_line->table));
00546 
00547   for (uint i = 0; i < SNOW_LINE_MONTHS; i++) {
00548     for (uint j = 0; j < SNOW_LINE_DAYS; j++) {
00549       _snow_line->highest_value = max(_snow_line->highest_value, table[i][j]);
00550       _snow_line->lowest_value = min(_snow_line->lowest_value, table[i][j]);
00551     }
00552   }
00553 }
00554 
00560 byte GetSnowLine()
00561 {
00562   if (_snow_line == NULL) return _settings_game.game_creation.snow_line;
00563 
00564   YearMonthDay ymd;
00565   ConvertDateToYMD(_date, &ymd);
00566   return _snow_line->table[ymd.month][ymd.day];
00567 }
00568 
00574 byte HighestSnowLine()
00575 {
00576   return _snow_line == NULL ? _settings_game.game_creation.snow_line : _snow_line->highest_value;
00577 }
00578 
00584 byte LowestSnowLine()
00585 {
00586   return _snow_line == NULL ? _settings_game.game_creation.snow_line : _snow_line->lowest_value;
00587 }
00588 
00593 void ClearSnowLine()
00594 {
00595   free(_snow_line);
00596   _snow_line = NULL;
00597 }
00598 
00608 CommandCost CmdLandscapeClear(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00609 {
00610   CommandCost cost(EXPENSES_CONSTRUCTION);
00611   bool do_clear = false;
00612   /* Test for stuff which results in water when cleared. Then add the cost to also clear the water. */
00613   if ((flags & DC_FORCE_CLEAR_TILE) && HasTileWaterClass(tile) && IsTileOnWater(tile) && !IsWaterTile(tile) && !IsCoastTile(tile)) {
00614     if ((flags & DC_AUTO) && GetWaterClass(tile) == WATER_CLASS_CANAL) return_cmd_error(STR_ERROR_MUST_DEMOLISH_CANAL_FIRST);
00615     do_clear = true;
00616     cost.AddCost(GetWaterClass(tile) == WATER_CLASS_CANAL ? _price[PR_CLEAR_CANAL] : _price[PR_CLEAR_WATER]);
00617   }
00618 
00619   Company *c = (flags & (DC_AUTO | DC_BANKRUPT)) ? NULL : Company::GetIfValid(_current_company);
00620   if (c != NULL && (int)GB(c->clear_limit, 16, 16) < 1) {
00621     return_cmd_error(STR_ERROR_CLEARING_LIMIT_REACHED);
00622   }
00623 
00624   const ClearedObjectArea *coa = FindClearedObject(tile);
00625 
00626   /* If this tile was the first tile which caused object destruction, always
00627    * pass it on to the tile_type_proc. That way multiple test runs and the exec run stay consistent. */
00628   if (coa != NULL && coa->first_tile != tile) {
00629     /* If this tile belongs to an object which was already cleared via another tile, pretend it has been
00630      * already removed.
00631      * However, we need to check stuff, which is not the same for all object tiles. (e.g. being on water or not) */
00632 
00633     /* If a object is removed, it leaves either bare land or water. */
00634     if ((flags & DC_NO_WATER) && HasTileWaterClass(tile) && IsTileOnWater(tile)) {
00635       return_cmd_error(STR_ERROR_CAN_T_BUILD_ON_WATER);
00636     }
00637   } else {
00638     cost.AddCost(_tile_type_procs[GetTileType(tile)]->clear_tile_proc(tile, flags));
00639   }
00640 
00641   if (flags & DC_EXEC) {
00642     if (c != NULL) c->clear_limit -= 1 << 16;
00643     if (do_clear) DoClearSquare(tile);
00644   }
00645   return cost;
00646 }
00647 
00658 CommandCost CmdClearArea(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00659 {
00660   if (p1 >= MapSize()) return CMD_ERROR;
00661 
00662   Money money = GetAvailableMoneyForCommand();
00663   CommandCost cost(EXPENSES_CONSTRUCTION);
00664   CommandCost last_error = CMD_ERROR;
00665   bool had_success = false;
00666 
00667   const Company *c = (flags & (DC_AUTO | DC_BANKRUPT)) ? NULL : Company::GetIfValid(_current_company);
00668   int limit = (c == NULL ? INT32_MAX : GB(c->clear_limit, 16, 16));
00669 
00670   TileArea ta(tile, p1);
00671   TileIterator *iter = HasBit(p2, 0) ? (TileIterator *)new DiagonalTileIterator(tile, p1) : new OrthogonalTileIterator(ta);
00672   for (; *iter != INVALID_TILE; ++(*iter)) {
00673     TileIndex t = *iter;
00674     CommandCost ret = DoCommand(t, 0, 0, flags & ~DC_EXEC, CMD_LANDSCAPE_CLEAR);
00675     if (ret.Failed()) {
00676       last_error = ret;
00677 
00678       /* We may not clear more tiles. */
00679       if (c != NULL && GB(c->clear_limit, 16, 16) < 1) break;
00680       continue;
00681     }
00682 
00683     had_success = true;
00684     if (flags & DC_EXEC) {
00685       money -= ret.GetCost();
00686       if (ret.GetCost() > 0 && money < 0) {
00687         _additional_cash_required = ret.GetCost();
00688         delete iter;
00689         return cost;
00690       }
00691       DoCommand(t, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00692 
00693       /* draw explosion animation... */
00694       TileIndex off = t - ta.tile;
00695       if ((TileX(off) == 0 || TileX(off) == ta.w - 1U) && (TileY(off) == 0 || TileY(off) == ta.h - 1U)) {
00696         /* big explosion in each corner, or small explosion for single tiles */
00697         CreateEffectVehicleAbove(TileX(t) * TILE_SIZE + TILE_SIZE / 2, TileY(t) * TILE_SIZE + TILE_SIZE / 2, 2,
00698           ta.w == 1 && ta.h == 1 ? EV_EXPLOSION_SMALL : EV_EXPLOSION_LARGE
00699         );
00700       }
00701     } else {
00702       /* When we're at the clearing limit we better bail (unneed) testing as well. */
00703       if (ret.GetCost() != 0 && --limit <= 0) break;
00704     }
00705     cost.AddCost(ret);
00706   }
00707 
00708   delete iter;
00709   return had_success ? cost : last_error;
00710 }
00711 
00712 
00713 TileIndex _cur_tileloop_tile;
00714 #define TILELOOP_BITS 4
00715 #define TILELOOP_SIZE (1 << TILELOOP_BITS)
00716 #define TILELOOP_ASSERTMASK ((TILELOOP_SIZE - 1) + ((TILELOOP_SIZE - 1) << MapLogX()))
00717 #define TILELOOP_CHKMASK (((1 << (MapLogX() - TILELOOP_BITS))-1) << TILELOOP_BITS)
00718 
00719 void RunTileLoop()
00720 {
00721   TileIndex tile = _cur_tileloop_tile;
00722 
00723   assert((tile & ~TILELOOP_ASSERTMASK) == 0);
00724   uint count = (MapSizeX() / TILELOOP_SIZE) * (MapSizeY() / TILELOOP_SIZE);
00725   do {
00726     _tile_type_procs[GetTileType(tile)]->tile_loop_proc(tile);
00727 
00728     if (TileX(tile) < MapSizeX() - TILELOOP_SIZE) {
00729       tile += TILELOOP_SIZE; // no overflow
00730     } else {
00731       tile = TILE_MASK(tile - TILELOOP_SIZE * (MapSizeX() / TILELOOP_SIZE - 1) + TileDiffXY(0, TILELOOP_SIZE)); // x would overflow, also increase y
00732     }
00733   } while (--count != 0);
00734   assert((tile & ~TILELOOP_ASSERTMASK) == 0);
00735 
00736   tile += 9;
00737   if (tile & TILELOOP_CHKMASK) {
00738     tile = (tile + MapSizeX()) & TILELOOP_ASSERTMASK;
00739   }
00740   _cur_tileloop_tile = tile;
00741 }
00742 
00743 void InitializeLandscape()
00744 {
00745   uint maxx = MapMaxX();
00746   uint maxy = MapMaxY();
00747   uint sizex = MapSizeX();
00748 
00749   uint y;
00750   for (y = _settings_game.construction.freeform_edges ? 1 : 0; y < maxy; y++) {
00751     uint x;
00752     for (x = _settings_game.construction.freeform_edges ? 1 : 0; x < maxx; x++) {
00753       MakeClear(sizex * y + x, CLEAR_GRASS, 3);
00754       SetTileHeight(sizex * y + x, 0);
00755       SetTropicZone(sizex * y + x, TROPICZONE_NORMAL);
00756       ClearBridgeMiddle(sizex * y + x);
00757     }
00758     MakeVoid(sizex * y + x);
00759   }
00760   for (uint x = 0; x < sizex; x++) MakeVoid(sizex * y + x);
00761 }
00762 
00763 static const byte _genterrain_tbl_1[5] = { 10, 22, 33, 37, 4  };
00764 static const byte _genterrain_tbl_2[5] = {  0,  0,  0,  0, 33 };
00765 
00766 static void GenerateTerrain(int type, uint flag)
00767 {
00768   uint32 r = Random();
00769 
00770   const Sprite *templ = GetSprite((((r >> 24) * _genterrain_tbl_1[type]) >> 8) + _genterrain_tbl_2[type] + 4845, ST_MAPGEN);
00771 
00772   uint x = r & MapMaxX();
00773   uint y = (r >> MapLogX()) & MapMaxY();
00774 
00775   if (x < 2 || y < 2) return;
00776 
00777   DiagDirection direction = (DiagDirection)GB(r, 22, 2);
00778   uint w = templ->width;
00779   uint h = templ->height;
00780 
00781   if (DiagDirToAxis(direction) == AXIS_Y) Swap(w, h);
00782 
00783   const byte *p = templ->data;
00784 
00785   if ((flag & 4) != 0) {
00786     uint xw = x * MapSizeY();
00787     uint yw = y * MapSizeX();
00788     uint bias = (MapSizeX() + MapSizeY()) * 16;
00789 
00790     switch (flag & 3) {
00791       default: NOT_REACHED();
00792       case 0:
00793         if (xw + yw > MapSize() - bias) return;
00794         break;
00795 
00796       case 1:
00797         if (yw < xw + bias) return;
00798         break;
00799 
00800       case 2:
00801         if (xw + yw < MapSize() + bias) return;
00802         break;
00803 
00804       case 3:
00805         if (xw < yw + bias) return;
00806         break;
00807     }
00808   }
00809 
00810   if (x + w >= MapMaxX() - 1) return;
00811   if (y + h >= MapMaxY() - 1) return;
00812 
00813   Tile *tile = &_m[TileXY(x, y)];
00814 
00815   switch (direction) {
00816     default: NOT_REACHED();
00817     case DIAGDIR_NE:
00818       do {
00819         Tile *tile_cur = tile;
00820 
00821         for (uint w_cur = w; w_cur != 0; --w_cur) {
00822           if (GB(*p, 0, 4) >= tile_cur->type_height) tile_cur->type_height = GB(*p, 0, 4);
00823           p++;
00824           tile_cur++;
00825         }
00826         tile += TileDiffXY(0, 1);
00827       } while (--h != 0);
00828       break;
00829 
00830     case DIAGDIR_SE:
00831       do {
00832         Tile *tile_cur = tile;
00833 
00834         for (uint h_cur = h; h_cur != 0; --h_cur) {
00835           if (GB(*p, 0, 4) >= tile_cur->type_height) tile_cur->type_height = GB(*p, 0, 4);
00836           p++;
00837           tile_cur += TileDiffXY(0, 1);
00838         }
00839         tile += TileDiffXY(1, 0);
00840       } while (--w != 0);
00841       break;
00842 
00843     case DIAGDIR_SW:
00844       tile += TileDiffXY(w - 1, 0);
00845       do {
00846         Tile *tile_cur = tile;
00847 
00848         for (uint w_cur = w; w_cur != 0; --w_cur) {
00849           if (GB(*p, 0, 4) >= tile_cur->type_height) tile_cur->type_height = GB(*p, 0, 4);
00850           p++;
00851           tile_cur--;
00852         }
00853         tile += TileDiffXY(0, 1);
00854       } while (--h != 0);
00855       break;
00856 
00857     case DIAGDIR_NW:
00858       tile += TileDiffXY(0, h - 1);
00859       do {
00860         Tile *tile_cur = tile;
00861 
00862         for (uint h_cur = h; h_cur != 0; --h_cur) {
00863           if (GB(*p, 0, 4) >= tile_cur->type_height) tile_cur->type_height = GB(*p, 0, 4);
00864           p++;
00865           tile_cur -= TileDiffXY(0, 1);
00866         }
00867         tile += TileDiffXY(1, 0);
00868       } while (--w != 0);
00869       break;
00870   }
00871 }
00872 
00873 
00874 #include "table/genland.h"
00875 
00876 static void CreateDesertOrRainForest()
00877 {
00878   TileIndex update_freq = MapSize() / 4;
00879   const TileIndexDiffC *data;
00880 
00881   for (TileIndex tile = 0; tile != MapSize(); ++tile) {
00882     if ((tile % update_freq) == 0) IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
00883 
00884     if (!IsValidTile(tile)) continue;
00885 
00886     for (data = _make_desert_or_rainforest_data;
00887         data != endof(_make_desert_or_rainforest_data); ++data) {
00888       TileIndex t = AddTileIndexDiffCWrap(tile, *data);
00889       if (t != INVALID_TILE && (TileHeight(t) >= 4 || IsTileType(t, MP_WATER))) break;
00890     }
00891     if (data == endof(_make_desert_or_rainforest_data)) {
00892       SetTropicZone(tile, TROPICZONE_DESERT);
00893     }
00894   }
00895 
00896   for (uint i = 0; i != 256; i++) {
00897     if ((i % 64) == 0) IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
00898 
00899     RunTileLoop();
00900   }
00901 
00902   for (TileIndex tile = 0; tile != MapSize(); ++tile) {
00903     if ((tile % update_freq) == 0) IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
00904 
00905     if (!IsValidTile(tile)) continue;
00906 
00907     for (data = _make_desert_or_rainforest_data;
00908         data != endof(_make_desert_or_rainforest_data); ++data) {
00909       TileIndex t = AddTileIndexDiffCWrap(tile, *data);
00910       if (t != INVALID_TILE && IsTileType(t, MP_CLEAR) && IsClearGround(t, CLEAR_DESERT)) break;
00911     }
00912     if (data == endof(_make_desert_or_rainforest_data)) {
00913       SetTropicZone(tile, TROPICZONE_RAINFOREST);
00914     }
00915   }
00916 }
00917 
00918 void GenerateLandscape(byte mode)
00919 {
00921   enum GenLandscapeSteps {
00922     GLS_HEIGHTMAP    =  3, 
00923     GLS_TERRAGENESIS =  5, 
00924     GLS_ORIGINAL     =  2, 
00925     GLS_TROPIC       = 12, 
00926     GLS_OTHER        =  0, 
00927   };
00928   uint steps = (_settings_game.game_creation.landscape == LT_TROPIC) ? GLS_TROPIC : GLS_OTHER;
00929 
00930   if (mode == GWM_HEIGHTMAP) {
00931     SetGeneratingWorldProgress(GWP_LANDSCAPE, steps + GLS_HEIGHTMAP);
00932     LoadHeightmap(_file_to_saveload.name);
00933     IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
00934   } else if (_settings_game.game_creation.land_generator == LG_TERRAGENESIS) {
00935     SetGeneratingWorldProgress(GWP_LANDSCAPE, steps + GLS_TERRAGENESIS);
00936     GenerateTerrainPerlin();
00937   } else {
00938     SetGeneratingWorldProgress(GWP_LANDSCAPE, steps + GLS_ORIGINAL);
00939     if (_settings_game.construction.freeform_edges) {
00940       for (uint x = 0; x < MapSizeX(); x++) MakeVoid(TileXY(x, 0));
00941       for (uint y = 0; y < MapSizeY(); y++) MakeVoid(TileXY(0, y));
00942     }
00943     switch (_settings_game.game_creation.landscape) {
00944       case LT_ARCTIC: {
00945         uint32 r = Random();
00946 
00947         for (uint i = ScaleByMapSize(GB(r, 0, 7) + 950); i != 0; --i) {
00948           GenerateTerrain(2, 0);
00949         }
00950 
00951         uint flag = GB(r, 7, 2) | 4;
00952         for (uint i = ScaleByMapSize(GB(r, 9, 7) + 450); i != 0; --i) {
00953           GenerateTerrain(4, flag);
00954         }
00955         break;
00956       }
00957 
00958       case LT_TROPIC: {
00959         uint32 r = Random();
00960 
00961         for (uint i = ScaleByMapSize(GB(r, 0, 7) + 170); i != 0; --i) {
00962           GenerateTerrain(0, 0);
00963         }
00964 
00965         uint flag = GB(r, 7, 2) | 4;
00966         for (uint i = ScaleByMapSize(GB(r, 9, 8) + 1700); i != 0; --i) {
00967           GenerateTerrain(0, flag);
00968         }
00969 
00970         flag ^= 2;
00971 
00972         for (uint i = ScaleByMapSize(GB(r, 17, 7) + 410); i != 0; --i) {
00973           GenerateTerrain(3, flag);
00974         }
00975         break;
00976       }
00977 
00978       default: {
00979         uint32 r = Random();
00980 
00981         assert(_settings_game.difficulty.quantity_sea_lakes != CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY);
00982         uint i = ScaleByMapSize(GB(r, 0, 7) + (3 - _settings_game.difficulty.quantity_sea_lakes) * 256 + 100);
00983         for (; i != 0; --i) {
00984           GenerateTerrain(_settings_game.difficulty.terrain_type, 0);
00985         }
00986         break;
00987       }
00988     }
00989   }
00990 
00991   /* Do not call IncreaseGeneratingWorldProgress() before FixSlopes(),
00992    * it allows screen redraw. Drawing of broken slopes crashes the game */
00993   FixSlopes();
00994   IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
00995   ConvertGroundTilesIntoWaterTiles();
00996   IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
00997 
00998   if (_settings_game.game_creation.landscape == LT_TROPIC) CreateDesertOrRainForest();
00999 }
01000 
01001 void OnTick_Town();
01002 void OnTick_Trees();
01003 void OnTick_Station();
01004 void OnTick_Industry();
01005 
01006 void OnTick_Companies();
01007 
01008 void CallLandscapeTick()
01009 {
01010   OnTick_Town();
01011   OnTick_Trees();
01012   OnTick_Station();
01013   OnTick_Industry();
01014 
01015   OnTick_Companies();
01016 }

Generated on Wed Apr 13 00:47:48 2011 for OpenTTD by  doxygen 1.6.1