newgrf_industries.cpp

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00001 /* $Id: newgrf_industries.cpp 13871 2008-07-29 22:37:54Z rubidium $ */
00002 
00005 #include "stdafx.h"
00006 #include "openttd.h"
00007 #include "debug.h"
00008 #include "variables.h"
00009 #include "landscape.h"
00010 #include "industry.h"
00011 #include "industry_map.h"
00012 #include "newgrf.h"
00013 #include "newgrf_callbacks.h"
00014 #include "newgrf_spritegroup.h"
00015 #include "newgrf_industries.h"
00016 #include "newgrf_industrytiles.h"
00017 #include "newgrf_commons.h"
00018 #include "newgrf_text.h"
00019 #include "newgrf_town.h"
00020 #include "window_func.h"
00021 #include "town.h"
00022 #include "player_func.h"
00023 #include "player_base.h"
00024 #include "command_func.h"
00025 
00026 #include "table/strings.h"
00027 
00028 static uint32 _industry_creation_random_bits;
00029 
00030 /* Since the industry IDs defined by the GRF file don't necessarily correlate
00031  * to those used by the game, the IDs used for overriding old industries must be
00032  * translated when the idustry spec is set. */
00033 IndustryOverrideManager _industry_mngr(NEW_INDUSTRYOFFSET, NUM_INDUSTRYTYPES, INVALID_INDUSTRYTYPE);
00034 IndustryTileOverrideManager _industile_mngr(NEW_INDUSTRYTILEOFFSET, NUM_INDUSTRYTILES, INVALID_INDUSTRYTILE);
00035 
00036 IndustryType MapNewGRFIndustryType(IndustryType grf_type, uint32 grf_id)
00037 {
00038   if (grf_type == IT_INVALID) return IT_INVALID;
00039   if (!HasBit(grf_type, 7)) return GB(grf_type, 0, 6);
00040 
00041   return _industry_mngr.GetID(GB(grf_type, 0, 6), grf_id);
00042 }
00043 
00044 static uint32 GetGRFParameter(IndustryType ind_id, byte parameter)
00045 {
00046   const IndustrySpec *indspec = GetIndustrySpec(ind_id);
00047   const GRFFile *file = indspec->grf_prop.grffile;
00048 
00049   if (parameter >= file->param_end) return 0;
00050   return file->param[parameter];
00051 }
00052 
00059 static uint GetClosestWaterDistance(TileIndex tile, bool water)
00060 {
00061   TileIndex t;
00062   int best_dist;
00063   for (t = 0; t < MapSize(); t++) {
00064     if (IsTileType(t, MP_WATER) == water) break;
00065   }
00066   if (t == MapSize() && !water) return 0x200;
00067   best_dist = DistanceManhattan(tile, t);
00068 
00069   for (; t < MapSize(); t++) {
00070     int dist = DistanceManhattan(tile, t);
00071     if (dist < best_dist) {
00072       if (IsTileType(t, MP_WATER) == water) best_dist = dist;
00073     } else {
00074       /* When the Y distance between the current row and the 'source' tile
00075        * is larger than the best distance, we've found the best distance */
00076       if ((int)TileY(t) - (int)TileY(tile) > best_dist) break;
00077       if ((int)TileX(t) - (int)TileX(tile) > best_dist) {
00078         /* We can safely skip this many tiles; from here all tiles have a
00079          * higher or equal distance than the best distance */
00080         t |= MapMaxX();
00081         continue;
00082       } else if (TileX(tile) < TileX(t)) {
00083         /* We can safely skip this many tiles; up to here all tiles have a
00084          * higher or equal distance than the best distance */
00085         t += max(best_dist - dist, 0);
00086         continue;
00087       }
00088     }
00089   }
00090 
00091   return min(best_dist, water ? 0x7F : 0x1FF);
00092 }
00093 
00099 uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i)
00100 {
00101   if (!IsTileType(tile, MP_INDUSTRY) || GetIndustryIndex(tile) != i->index) {
00102     /* No industry and/or the tile does not have the same industry as the one we match it with */
00103     return 0xFFFF;
00104   }
00105 
00106   IndustryGfx gfx = GetCleanIndustryGfx(tile);
00107   const IndustryTileSpec *indtsp = GetIndustryTileSpec(gfx);
00108   const IndustrySpec *indold = GetIndustrySpec(i->type);
00109 
00110   if (gfx < NEW_INDUSTRYOFFSET) { // Does it belongs to an old type?
00111     /* It is an old tile.  We have to see if it's been overriden */
00112     if (indtsp->grf_prop.override == INVALID_INDUSTRYTILE) { // has it been overridden?
00113       return 0xFF << 8 | gfx; // no. Tag FF + the gfx id of that tile
00114     }
00115     /* Not overriden */
00116     const IndustryTileSpec *tile_ovr = GetIndustryTileSpec(indtsp->grf_prop.override);
00117 
00118     if (tile_ovr->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) {
00119       return tile_ovr->grf_prop.local_id; // same grf file
00120     } else {
00121       return 0xFFFE; // not the same grf file
00122     }
00123   }
00124   /* Not an 'old type' tile */
00125   if (indtsp->grf_prop.spritegroup != NULL) { // tile has a spritegroup ?
00126     if (indtsp->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) { // same industry, same grf ?
00127       return indtsp->grf_prop.local_id;
00128     } else {
00129       return 0xFFFE; // Defined in another grf file
00130     }
00131   }
00132   /* The tile has no spritegroup */
00133   return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give him the substitute
00134 }
00135 
00136 static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
00137 {
00138   uint32 best_dist = MAX_UVALUE(uint32);
00139   const Industry *i;
00140   FOR_ALL_INDUSTRIES(i) {
00141     if (i->type != type || i == current) continue;
00142 
00143     best_dist = min(best_dist, DistanceManhattan(tile, i->xy));
00144   }
00145 
00146   return best_dist;
00147 }
00148 
00157 static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, const Industry *current)
00158 {
00159   uint32 GrfID = GetRegister(0x100);  
00160   IndustryType ind_index;
00161   uint32 closest_dist = MAX_UVALUE(uint32);
00162   byte count = 0;
00163 
00164   /* Determine what will be the industry type to look for */
00165   switch (GrfID) {
00166     case 0:  // this is a default industry type
00167       ind_index = param_setID;
00168       break;
00169 
00170     case 0xFFFFFFFF: // current grf
00171       GrfID = GetIndustrySpec(current->type)->grf_prop.grffile->grfid;
00172       /* Fall through */
00173 
00174     default: //use the grfid specified in register 100h
00175       SetBit(param_setID, 7); // bit 7 means it is not an old type
00176       ind_index = MapNewGRFIndustryType(param_setID, GrfID);
00177       break;
00178   }
00179 
00180   if (layout_filter == 0) {
00181     /* If the filter is 0, it could be because none was specified as well as being really a 0.
00182      * In either case, just do the regular var67 */
00183     closest_dist = GetClosestIndustry(current->xy, ind_index, current);
00184     count = GetIndustryTypeCount(ind_index);
00185   } else {
00186     /* Count only those who match the same industry type and layout filter
00187      * Unfortunately, we have to do it manually */
00188     const Industry *i;
00189     FOR_ALL_INDUSTRIES(i) {
00190       if (i->type == ind_index && i != current && i->selected_layout == layout_filter) {
00191         closest_dist = min(closest_dist, DistanceManhattan(current->xy, i->xy));
00192         count++;
00193       }
00194     }
00195   }
00196 
00197   return count << 16 | GB(closest_dist, 0, 16);
00198 }
00199 
00206 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00207 {
00208   const Industry *industry = object->u.industry.ind;
00209   TileIndex tile = object->u.industry.tile;
00210   IndustryType type = object->u.industry.type;
00211   const IndustrySpec *indspec = GetIndustrySpec(type);
00212 
00213   /* Shall the variable get resolved in parent scope and are we not yet in parent scope? */
00214   if (object->u.industry.gfx == INVALID_INDUSTRYTILE && object->scope == VSG_SCOPE_PARENT) {
00215     /* Pass the request on to the town of the industry */
00216     const Town *t;
00217 
00218     if (industry != NULL) {
00219       t = industry->town;
00220     } else if (tile != INVALID_TILE) {
00221       t = ClosestTownFromTile(tile, UINT_MAX);
00222     } else {
00223       *available = false;
00224       return UINT_MAX;
00225     }
00226 
00227     return TownGetVariable(variable, parameter, available, t);
00228   }
00229 
00230   if (industry == NULL) {
00231     /* industry does not exist, only use those variables that are "safe" */
00232     switch (variable) {
00233       /* Read GRF parameter */
00234       case 0x7F: return GetGRFParameter(type, parameter);
00235       /* Manhattan distance of closes dry/water tile */
00236       case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00237     }
00238 
00239     DEBUG(grf, 1, "Unhandled property 0x%X (no available industry) in callback 0x%x", variable, object->callback);
00240 
00241     *available = false;
00242     return UINT_MAX;
00243   }
00244 
00245   switch (variable) {
00246     case 0x40:
00247     case 0x41:
00248     case 0x42: { // waiting cargo, but only if those two callback flags are set
00249       uint16 callback = indspec->callback_flags;
00250       if (HasBit(callback, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(callback, CBM_IND_PRODUCTION_256_TICKS)) {
00251         if ((indspec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) {
00252           return min(industry->incoming_cargo_waiting[variable - 0x40] / industry->prod_level, (uint16)0xFFFF);
00253         } else {
00254           return min(industry->incoming_cargo_waiting[variable - 0x40], (uint16)0xFFFF);
00255         }
00256       } else {
00257         return 0;
00258       }
00259     }
00260 
00261     /* Manhattan distance of closes dry/water tile */
00262     case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00263 
00264     /* Layout number */
00265     case 0x44: return industry->selected_layout;
00266 
00267     /* player info */
00268     case 0x45: {
00269       byte colours;
00270       bool is_ai = false;
00271 
00272       if (IsValidPlayer(industry->founder)) {
00273         const Player *p = GetPlayer(industry->founder);
00274         const Livery *l = &p->livery[LS_DEFAULT];
00275 
00276         is_ai = p->is_ai;
00277         colours = l->colour1 + l->colour2 * 16;
00278       } else {
00279         colours = GB(Random(), 0, 8);
00280       }
00281 
00282       return industry->founder | (is_ai ? 0x10000 : 0) | (colours << 24);
00283     }
00284 
00285     /* Get industry ID at offset param */
00286     case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->xy), industry);
00287 
00288     /* Get random tile bits at offset param */
00289     case 0x61:
00290       tile = GetNearbyTile(parameter, tile);
00291       return (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) ? GetIndustryRandomBits(tile) : 0;
00292 
00293     /* Land info of nearby tiles */
00294     case 0x62: return GetNearbyIndustryTileInformation(parameter, tile, INVALID_INDUSTRY);
00295 
00296     /* Animation stage of nearby tiles */
00297     case 0x63:
00298       tile = GetNearbyTile(parameter, tile);
00299       if (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) {
00300         return GetIndustryAnimationState(tile);
00301       }
00302       return 0xFFFFFFFF;
00303 
00304     /* Distance of nearest industry of given type */
00305     case 0x64: return GetClosestIndustry(tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), industry);
00306     /* Get town zone and Manhattan distance of closest town */
00307     case 0x65: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceManhattan(tile, industry->town->xy), 0xFFFF);
00308     /* Get square of Euclidian distance of closes town */
00309     case 0x66: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceSquare(tile, industry->town->xy), 0xFFFF);
00310 
00311     /* Count of industry, distance of closest instance
00312      * 68 is the same as 67, but with a filtering on selected layout */
00313     case 0x67:
00314     case 0x68: return GetCountAndDistanceOfClosestInstance(parameter, variable == 0x68 ? GB(GetRegister(0x101), 0, 8) : 0, industry);
00315 
00316     /* Get a variable from the persistent storage */
00317     case 0x7C: return industry->psa.Get(parameter);
00318 
00319     /* Read GRF parameter */
00320     case 0x7F: return GetGRFParameter(type, parameter);
00321 
00322     /* Industry structure access*/
00323     case 0x80: return industry->xy;
00324     case 0x81: return GB(industry->xy, 8, 8);
00325     /* Pointer to the town the industry is associated with */
00326     case 0x82: return industry->town->index;
00327     case 0x83:
00328     case 0x84:
00329     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
00330     case 0x86: return industry->width;
00331     case 0x87: return industry->height;// xy dimensions
00332     /*  */
00333     case 0x88:
00334     case 0x89: return industry->produced_cargo[variable - 0x88];
00335     case 0x8A: return industry->produced_cargo_waiting[0];
00336     case 0x8B: return GB(industry->produced_cargo_waiting[0], 8, 8);
00337     case 0x8C: return industry->produced_cargo_waiting[1];
00338     case 0x8D: return GB(industry->produced_cargo_waiting[1], 8, 8);
00339     case 0x8E:
00340     case 0x8F: return industry->production_rate[variable - 0x8E];
00341     case 0x90:
00342     case 0x91:
00343     case 0x92: return industry->accepts_cargo[variable - 0x90];
00344     case 0x93: return industry->prod_level;
00345     /* amount of cargo produced so far THIS month. */
00346     case 0x94: return industry->this_month_production[0];
00347     case 0x95: return GB(industry->this_month_production[0], 8, 8);
00348     case 0x96: return industry->this_month_production[1];
00349     case 0x97: return GB(industry->this_month_production[1], 8, 8);
00350     /* amount of cargo transported so far THIS month. */
00351     case 0x98: return industry->this_month_transported[0];
00352     case 0x99: return GB(industry->this_month_transported[0], 8, 8);
00353     case 0x9A: return industry->this_month_transported[1];
00354     case 0x9B: return GB(industry->this_month_transported[0], 8, 8);
00355     /* fraction of cargo transported LAST month. */
00356     case 0x9C:
00357     case 0x9D: return industry->last_month_pct_transported[variable - 0x9C];
00358     /* amount of cargo produced LAST month. */
00359     case 0x9E: return industry->last_month_production[0];
00360     case 0x9F: return GB(industry->last_month_production[0], 8, 8);
00361     case 0xA0: return industry->last_month_production[1];
00362     case 0xA1: return GB(industry->last_month_production[1], 8, 8);
00363     /* amount of cargo transported last month. */
00364     case 0xA2: return industry->last_month_transported[0];
00365     case 0xA3: return GB(industry->last_month_transported[0], 8, 8);
00366     case 0xA4: return industry->last_month_transported[1];
00367     case 0xA5: return GB(industry->last_month_transported[0], 8, 8);
00368 
00369     case 0xA6: return industry->type;
00370     case 0xA7: return industry->founder;
00371     case 0xA8: return industry->random_color;
00372     case 0xA9: return Clamp(industry->last_prod_year - ORIGINAL_BASE_YEAR, 0, 255);
00373     case 0xAA: return industry->counter;
00374     case 0xAB: return GB(industry->counter, 8, 8);
00375     case 0xAC: return industry->was_cargo_delivered;
00376 
00377     case 0xB0: return Clamp(industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date when built since 1920 (in days)
00378     case 0xB3: return industry->construction_type; // Construction type
00379     case 0xB4: return Clamp(industry->last_cargo_accepted_at - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date last cargo accepted since 1920 (in days)
00380   }
00381 
00382   DEBUG(grf, 1, "Unhandled industry property 0x%X", variable);
00383 
00384   *available = false;
00385   return (uint32)-1;
00386 }
00387 
00388 static const SpriteGroup *IndustryResolveReal(const ResolverObject *object, const SpriteGroup *group)
00389 {
00390   /* IndustryTile do not have 'real' groups */
00391   return NULL;
00392 }
00393 
00394 static uint32 IndustryGetRandomBits(const ResolverObject *object)
00395 {
00396   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random;
00397 }
00398 
00399 static uint32 IndustryGetTriggers(const ResolverObject *object)
00400 {
00401   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random_triggers;
00402 }
00403 
00404 static void IndustrySetTriggers(const ResolverObject *object, int triggers)
00405 {
00406   if (object->u.industry.ind == NULL) return;
00407   object->u.industry.ind->random_triggers = triggers;
00408 }
00409 
00410 static void NewIndustryResolver(ResolverObject *res, TileIndex tile, Industry *indus, IndustryType type)
00411 {
00412   res->GetRandomBits = IndustryGetRandomBits;
00413   res->GetTriggers   = IndustryGetTriggers;
00414   res->SetTriggers   = IndustrySetTriggers;
00415   res->GetVariable   = IndustryGetVariable;
00416   res->ResolveReal   = IndustryResolveReal;
00417 
00418   res->psa             = &indus->psa;
00419   res->u.industry.tile = tile;
00420   res->u.industry.ind  = indus;
00421   res->u.industry.gfx  = INVALID_INDUSTRYTILE;
00422   res->u.industry.type = type;
00423 
00424   res->callback        = CBID_NO_CALLBACK;
00425   res->callback_param1 = 0;
00426   res->callback_param2 = 0;
00427   res->last_value      = 0;
00428   res->trigger         = 0;
00429   res->reseed          = 0;
00430 }
00431 
00432 uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile)
00433 {
00434   ResolverObject object;
00435   const SpriteGroup *group;
00436 
00437   NewIndustryResolver(&object, tile, industry, type);
00438   object.callback = callback;
00439   object.callback_param1 = param1;
00440   object.callback_param2 = param2;
00441 
00442   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
00443   if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
00444 
00445   return group->g.callback.result;
00446 }
00447 
00448 uint32 IndustryLocationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00449 {
00450   const Industry *industry = object->u.industry.ind;
00451   TileIndex tile = object->u.industry.tile;
00452 
00453   if (object->scope == VSG_SCOPE_PARENT) {
00454     return TownGetVariable(variable, parameter, available, industry->town);
00455   }
00456 
00457   switch (variable) {
00458     case 0x80: return tile;
00459     case 0x81: return GB(tile, 8, 8);
00460 
00461     /* Pointer to the town the industry is associated with */
00462     case 0x82: return industry->town->index;
00463     case 0x83:
00464     case 0x84:
00465     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
00466 
00467     /* Number of the layout */
00468     case 0x86: return industry->selected_layout;
00469 
00470     /* Ground type */
00471     case 0x87: return GetTerrainType(tile);
00472 
00473     /* Town zone */
00474     case 0x88: return GetTownRadiusGroup(industry->town, tile);
00475 
00476     /* Manhattan distance of the closest town */
00477     case 0x89: return min(DistanceManhattan(industry->town->xy, tile), 255);
00478 
00479     /* Lowest height of the tile */
00480     case 0x8A: return GetTileZ(tile);
00481 
00482     /* Distance to the nearest water/land tile */
00483     case 0x8B: return GetClosestWaterDistance(tile, (GetIndustrySpec(industry->type)->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00484 
00485     /* Square of Euclidian distance from town */
00486     case 0x8D: return min(DistanceSquare(industry->town->xy, tile), 65535);
00487 
00488     /* 32 random bits */
00489     case 0x8F: return _industry_creation_random_bits;
00490   }
00491 
00492   /* None of the special ones, so try the general ones */
00493   return IndustryGetVariable(object, variable, parameter, available);
00494 }
00495 
00496 bool CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint itspec_index, uint32 seed)
00497 {
00498   const IndustrySpec *indspec = GetIndustrySpec(type);
00499 
00500   ResolverObject object;
00501   const SpriteGroup *group;
00502 
00503   Industry ind;
00504   ind.index = INVALID_INDUSTRY;
00505   ind.xy = tile;
00506   ind.width = 0;
00507   ind.type = type;
00508   ind.selected_layout = itspec_index;
00509   ind.town = ClosestTownFromTile(tile, (uint)-1);
00510 
00511   NewIndustryResolver(&object, tile, &ind, type);
00512   object.GetVariable = IndustryLocationGetVariable;
00513   object.callback = CBID_INDUSTRY_LOCATION;
00514   _industry_creation_random_bits = seed;
00515 
00516   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
00517 
00518   /* Unlike the "normal" cases, not having a valid result means we allow
00519    * the building of the industry, as that's how it's done in TTDP. */
00520   if (group == NULL || group->type != SGT_CALLBACK) return true;
00521 
00522   /* Copy some parameters from the registers to the error message text ref. stack */
00523   SwitchToErrorRefStack();
00524   PrepareTextRefStackUsage(4);
00525   SwitchToNormalRefStack();
00526 
00527   switch (group->g.callback.result) {
00528     case 0x400: return true;
00529     case 0x401: _error_message = STR_0239_SITE_UNSUITABLE; break;
00530     case 0x402: _error_message = STR_0317_CAN_ONLY_BE_BUILT_IN_RAINFOREST; break;
00531     case 0x403: _error_message = STR_0318_CAN_ONLY_BE_BUILT_IN_DESERT; break;
00532     default: _error_message = GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + group->g.callback.result); break;
00533   }
00534 
00535   return false;
00536 }
00537 
00538 bool CheckIfCallBackAllowsAvailability(IndustryType type, IndustryAvailabilityCallType creation_type)
00539 {
00540   const IndustrySpec *indspec = GetIndustrySpec(type);
00541 
00542   if (HasBit(indspec->callback_flags, CBM_IND_AVAILABLE)) {
00543     uint16 res = GetIndustryCallback(CBID_INDUSTRY_AVAILABLE, 0, creation_type, NULL, type, INVALID_TILE);
00544     if (res != CALLBACK_FAILED) {
00545       return (res == 0);
00546     }
00547   }
00548   return true;
00549 }
00550 
00551 static int32 DerefIndProd(uint field, bool use_register)
00552 {
00553   return use_register ? (int32)GetRegister(field) : field;
00554 }
00555 
00561 void IndustryProductionCallback(Industry *ind, int reason)
00562 {
00563   const IndustrySpec *spec = GetIndustrySpec(ind->type);
00564   ResolverObject object;
00565   NewIndustryResolver(&object, ind->xy, ind, ind->type);
00566   if ((spec->behaviour & INDUSTRYBEH_PRODCALLBACK_RANDOM) != 0) object.callback_param1 = Random();
00567   int multiplier = 1;
00568   if ((spec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) multiplier = ind->prod_level;
00569   object.callback_param2 = reason;
00570 
00571   for (uint loop = 0;; loop++) {
00572     SB(object.callback_param2, 8, 16, loop);
00573     const SpriteGroup *group = Resolve(spec->grf_prop.spritegroup, &object);
00574     if (group == NULL || group->type != SGT_INDUSTRY_PRODUCTION) break;
00575 
00576     bool deref = (group->g.indprod.version == 1);
00577 
00578     for (uint i = 0; i < 3; i++) {
00579       ind->incoming_cargo_waiting[i] = Clamp(ind->incoming_cargo_waiting[i] - DerefIndProd(group->g.indprod.substract_input[i], deref) * multiplier, 0, 0xFFFF);
00580     }
00581     for (uint i = 0; i < 2; i++) {
00582       ind->produced_cargo_waiting[i] = Clamp(ind->produced_cargo_waiting[i] + max(DerefIndProd(group->g.indprod.add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
00583     }
00584 
00585     int32 again = DerefIndProd(group->g.indprod.again, deref);
00586     if (again == 0) break;
00587 
00588     SB(object.callback_param2, 24, 8, again);
00589   }
00590 
00591   InvalidateWindow(WC_INDUSTRY_VIEW, ind->index);
00592 }

Generated on Mon Sep 22 20:34:17 2008 for openttd by  doxygen 1.5.6