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Location: cpp/openttd-patchpack/source/src/newgrf_house.cpp - annotation
r18176:bc46dbc32c11
23.0 KiB
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(svn r23015) -Update from WebTranslator v3.0:
persian - 2 changes by Peymanpn
brazilian_portuguese - 3 changes by Rubidium
slovak - 29 changes by klingacik
welsh - 25 changes by kazzie
persian - 2 changes by Peymanpn
brazilian_portuguese - 3 changes by Rubidium
slovak - 29 changes by klingacik
welsh - 25 changes by kazzie
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r15071:e236d80508bb | /* $Id$ */
/*
* 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 newgrf_house.cpp Implementation of NewGRF houses. */
#include "stdafx.h"
#include "debug.h"
#include "viewport_func.h"
#include "landscape.h"
#include "newgrf.h"
#include "newgrf_house.h"
#include "newgrf_spritegroup.h"
#include "newgrf_town.h"
#include "newgrf_sound.h"
#include "company_func.h"
#include "company_base.h"
#include "town.h"
#include "sprite.h"
#include "genworld.h"
#include "newgrf_animation_base.h"
static BuildingCounts<uint32> _building_counts;
static HouseClassMapping _class_mapping[HOUSE_CLASS_MAX];
HouseOverrideManager _house_mngr(NEW_HOUSE_OFFSET, HOUSE_MAX, INVALID_HOUSE_ID);
HouseClassID AllocateHouseClassID(byte grf_class_id, uint32 grfid)
{
/* Start from 1 because 0 means that no class has been assigned. */
for (int i = 1; i != lengthof(_class_mapping); i++) {
HouseClassMapping *map = &_class_mapping[i];
if (map->class_id == grf_class_id && map->grfid == grfid) return (HouseClassID)i;
if (map->class_id == 0 && map->grfid == 0) {
map->class_id = grf_class_id;
map->grfid = grfid;
return (HouseClassID)i;
}
}
return HOUSE_NO_CLASS;
}
void InitializeBuildingCounts()
{
memset(&_building_counts, 0, sizeof(_building_counts));
}
/**
* IncreaseBuildingCount()
* Increase the count of a building when it has been added by a town.
* @param t The town that the building is being built in
* @param house_id The id of the house being added
*/
void IncreaseBuildingCount(Town *t, HouseID house_id)
{
HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
if (!_loaded_newgrf_features.has_newhouses) return;
t->building_counts.id_count[house_id]++;
_building_counts.id_count[house_id]++;
if (class_id == HOUSE_NO_CLASS) return;
t->building_counts.class_count[class_id]++;
_building_counts.class_count[class_id]++;
}
/**
* DecreaseBuildingCount()
* Decrease the number of a building when it is deleted.
* @param t The town that the building was built in
* @param house_id The id of the house being removed
*/
void DecreaseBuildingCount(Town *t, HouseID house_id)
{
HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
if (!_loaded_newgrf_features.has_newhouses) return;
if (t->building_counts.id_count[house_id] > 0) t->building_counts.id_count[house_id]--;
if (_building_counts.id_count[house_id] > 0) _building_counts.id_count[house_id]--;
if (class_id == HOUSE_NO_CLASS) return;
if (t->building_counts.class_count[class_id] > 0) t->building_counts.class_count[class_id]--;
if (_building_counts.class_count[class_id] > 0) _building_counts.class_count[class_id]--;
}
static uint32 HouseGetRandomBits(const ResolverObject *object)
{
/* Note: Towns build houses over houses. So during construction checks 'tile' may be a valid but unrelated house. */
TileIndex tile = object->u.house.tile;
assert(IsValidTile(tile) && (object->u.house.not_yet_constructed || IsTileType(tile, MP_HOUSE)));
return object->u.house.not_yet_constructed ? object->u.house.initial_random_bits : GetHouseRandomBits(tile);
}
static uint32 HouseGetTriggers(const ResolverObject *object)
{
/* Note: Towns build houses over houses. So during construction checks 'tile' may be a valid but unrelated house. */
TileIndex tile = object->u.house.tile;
assert(IsValidTile(tile) && (object->u.house.not_yet_constructed || IsTileType(tile, MP_HOUSE)));
return object->u.house.not_yet_constructed ? 0 : GetHouseTriggers(tile);
}
static void HouseSetTriggers(const ResolverObject *object, int triggers)
{
TileIndex tile = object->u.house.tile;
assert(!object->u.house.not_yet_constructed && IsValidTile(tile) && IsTileType(tile, MP_HOUSE));
SetHouseTriggers(tile, triggers);
}
static uint32 GetNumHouses(HouseID house_id, const Town *town)
{
uint8 map_id_count, town_id_count, map_class_count, town_class_count;
HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
map_id_count = ClampU(_building_counts.id_count[house_id], 0, 255);
map_class_count = ClampU(_building_counts.class_count[class_id], 0, 255);
town_id_count = ClampU(town->building_counts.id_count[house_id], 0, 255);
town_class_count = ClampU(town->building_counts.class_count[class_id], 0, 255);
return map_class_count << 24 | town_class_count << 16 | map_id_count << 8 | town_id_count;
}
uint32 GetNearbyTileInformation(byte parameter, TileIndex tile)
{
tile = GetNearbyTile(parameter, tile);
return GetNearbyTileInformation(tile);
}
/** Structure with user-data for SearchNearbyHouseXXX - functions */
typedef struct {
const HouseSpec *hs; ///< Specs of the house that started the search.
TileIndex north_tile; ///< Northern tile of the house.
} SearchNearbyHouseData;
/**
* Callback function to search a house by its HouseID
* @param tile TileIndex to be examined
* @param user_data SearchNearbyHouseData
* @return true or false, if found or not
*/
static bool SearchNearbyHouseID(TileIndex tile, void *user_data)
{
if (IsTileType(tile, MP_HOUSE)) {
HouseID house = GetHouseType(tile); // tile been examined
const HouseSpec *hs = HouseSpec::Get(house);
if (hs->grf_prop.grffile != NULL) { // must be one from a grf file
SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
TileIndex north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
if (north_tile == nbhd->north_tile) return false; // Always ignore origin house
return hs->grf_prop.local_id == nbhd->hs->grf_prop.local_id && // same local id as the one requested
hs->grf_prop.grffile->grfid == nbhd->hs->grf_prop.grffile->grfid; // from the same grf
}
}
return false;
}
/**
* Callback function to search a house by its classID
* @param tile TileIndex to be examined
* @param user_data SearchNearbyHouseData
* @return true or false, if found or not
*/
static bool SearchNearbyHouseClass(TileIndex tile, void *user_data)
{
if (IsTileType(tile, MP_HOUSE)) {
HouseID house = GetHouseType(tile); // tile been examined
const HouseSpec *hs = HouseSpec::Get(house);
if (hs->grf_prop.grffile != NULL) { // must be one from a grf file
SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
TileIndex north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
if (north_tile == nbhd->north_tile) return false; // Always ignore origin house
return hs->class_id == nbhd->hs->class_id && // same classid as the one requested
hs->grf_prop.grffile->grfid == nbhd->hs->grf_prop.grffile->grfid; // from the same grf
}
}
return false;
}
/**
* Callback function to search a house by its grfID
* @param tile TileIndex to be examined
* @param user_data SearchNearbyHouseData
* @return true or false, if found or not
*/
static bool SearchNearbyHouseGRFID(TileIndex tile, void *user_data)
{
if (IsTileType(tile, MP_HOUSE)) {
HouseID house = GetHouseType(tile); // tile been examined
const HouseSpec *hs = HouseSpec::Get(house);
if (hs->grf_prop.grffile != NULL) { // must be one from a grf file
SearchNearbyHouseData *nbhd = (SearchNearbyHouseData *)user_data;
TileIndex north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
if (north_tile == nbhd->north_tile) return false; // Always ignore origin house
return hs->grf_prop.grffile->grfid == nbhd->hs->grf_prop.grffile->grfid; // from the same grf
}
}
return false;
}
/**
* This function will activate a search around a central tile, looking for some houses
* that fit the requested characteristics
* @param parameter that is given by the callback.
* bits 0..6 radius of the search
* bits 7..8 search type i.e.: 0 = houseID/ 1 = classID/ 2 = grfID
* @param tile TileIndex from which to start the search
* @param house the HouseID that is associated to the house, the callback is called for
* @return the Manhattan distance from the center tile, if any, and 0 if failure
*/
static uint32 GetDistanceFromNearbyHouse(uint8 parameter, TileIndex tile, HouseID house)
{
static TestTileOnSearchProc * const search_procs[3] = {
SearchNearbyHouseID,
SearchNearbyHouseClass,
SearchNearbyHouseGRFID,
};
TileIndex found_tile = tile;
uint8 searchtype = GB(parameter, 6, 2);
uint8 searchradius = GB(parameter, 0, 6);
if (searchtype >= lengthof(search_procs)) return 0; // do not run on ill-defined code
if (searchradius < 1) return 0; // do not use a too low radius
SearchNearbyHouseData nbhd;
nbhd.hs = HouseSpec::Get(house);
nbhd.north_tile = tile + GetHouseNorthPart(house); // modifies 'house'!
/* Use a pointer for the tile to start the search. Will be required for calculating the distance*/
if (CircularTileSearch(&found_tile, 2 * searchradius + 1, search_procs[searchtype], &nbhd)) {
return DistanceManhattan(found_tile, tile);
}
return 0;
}
/**
* HouseGetVariable():
*
* Used by the resolver to get values for feature 07 deterministic spritegroups.
*/
static uint32 HouseGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
Town *town = object->u.house.town;
TileIndex tile = object->u.house.tile;
HouseID house_id = object->u.house.house_id;
if (object->scope == VSG_SCOPE_PARENT) {
return TownGetVariable(variable, parameter, available, town, object->grffile);
}
switch (variable) {
/* Construction stage. */
case 0x40: return (IsTileType(tile, MP_HOUSE) ? GetHouseBuildingStage(tile) : 0) | TileHash2Bit(TileX(tile), TileY(tile)) << 2;
/* Building age. */
case 0x41: return IsTileType(tile, MP_HOUSE) ? GetHouseAge(tile) : 0;
/* Town zone */
case 0x42: return GetTownRadiusGroup(town, tile);
/* Terrain type */
case 0x43: return GetTerrainType(tile);
/* Number of this type of building on the map. */
case 0x44: return GetNumHouses(house_id, town);
/* Whether the town is being created or just expanded. */
case 0x45: return _generating_world ? 1 : 0;
/* Current animation frame. */
case 0x46: return IsTileType(tile, MP_HOUSE) ? GetAnimationFrame(tile) : 0;
/* Position of the house */
case 0x47: return TileY(tile) << 16 | TileX(tile);
/* Building counts for old houses with id = parameter. */
case 0x60: return parameter < NEW_HOUSE_OFFSET ? GetNumHouses(parameter, town) : 0;
/* Building counts for new houses with id = parameter. */
case 0x61: {
const HouseSpec *hs = HouseSpec::Get(house_id);
if (hs->grf_prop.grffile == NULL) return 0;
HouseID new_house = _house_mngr.GetID(parameter, hs->grf_prop.grffile->grfid);
return new_house == INVALID_HOUSE_ID ? 0 : GetNumHouses(new_house, town);
}
/* Land info for nearby tiles. */
case 0x62: return GetNearbyTileInformation(parameter, tile);
/* Current animation frame of nearby house tiles */
case 0x63: {
TileIndex testtile = GetNearbyTile(parameter, tile);
return IsTileType(testtile, MP_HOUSE) ? GetAnimationFrame(testtile) : 0;
}
/* Cargo acceptance history of nearby stations */
/*case 0x64: not implemented yet */
/* Distance test for some house types */
case 0x65: return GetDistanceFromNearbyHouse(parameter, tile, object->u.house.house_id);
/* Class and ID of nearby house tile */
case 0x66: {
TileIndex testtile = GetNearbyTile(parameter, tile);
if (!IsTileType(testtile, MP_HOUSE)) return 0xFFFFFFFF;
HouseSpec *hs = HouseSpec::Get(GetHouseType(testtile));
/* Information about the grf local classid if the house has a class */
uint houseclass = 0;
if (hs->class_id != HOUSE_NO_CLASS) {
houseclass = (hs->grf_prop.grffile == object->grffile ? 1 : 2) << 8;
houseclass |= _class_mapping[hs->class_id].class_id;
}
/* old house type or grf-local houseid */
uint local_houseid = 0;
if (house_id < NEW_HOUSE_OFFSET) {
local_houseid = house_id;
} else {
local_houseid = (hs->grf_prop.grffile == object->grffile ? 1 : 2) << 8;
local_houseid |= hs->grf_prop.local_id;
}
return houseclass << 16 | local_houseid;
}
/* GRFID of nearby house tile */
case 0x67: {
TileIndex testtile = GetNearbyTile(parameter, tile);
if (!IsTileType(testtile, MP_HOUSE)) return 0xFFFFFFFF;
HouseID house_id = GetHouseType(testtile);
if (house_id < NEW_HOUSE_OFFSET) return 0;
/* Checking the grffile information via HouseSpec doesn't work
* in case the newgrf was removed. */
return _house_mngr.GetGRFID(house_id);
}
}
DEBUG(grf, 1, "Unhandled house variable 0x%X", variable);
*available = false;
return UINT_MAX;
}
static const SpriteGroup *HouseResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
{
/* Houses do not have 'real' groups */
return NULL;
}
/**
* Store a value into the persistent storage of the object's parent.
* @param object Object that we want to query.
* @param pos Position in the persistent storage to use.
* @param value Value to store.
*/
void HouseStorePSA(ResolverObject *object, uint pos, int32 value)
{
/* Houses have no persistent storage. */
if (object->scope != VSG_SCOPE_PARENT || object->u.house.not_yet_constructed) return;
/* Pass the request on to the town of the house */
TownStorePSA(object->u.house.town, object->grffile, pos, value);
}
/**
* NewHouseResolver():
*
* Returns a resolver object to be used with feature 07 spritegroups.
*/
static void NewHouseResolver(ResolverObject *res, HouseID house_id, TileIndex tile, Town *town)
{
res->GetRandomBits = HouseGetRandomBits;
res->GetTriggers = HouseGetTriggers;
res->SetTriggers = HouseSetTriggers;
res->GetVariable = HouseGetVariable;
res->ResolveReal = HouseResolveReal;
res->StorePSA = HouseStorePSA;
res->u.house.tile = tile;
res->u.house.town = town;
res->u.house.house_id = house_id;
res->u.house.not_yet_constructed = false;
res->callback = CBID_NO_CALLBACK;
res->callback_param1 = 0;
res->callback_param2 = 0;
res->ResetState();
const HouseSpec *hs = HouseSpec::Get(house_id);
res->grffile = (hs != NULL ? hs->grf_prop.grffile : NULL);
}
uint16 GetHouseCallback(CallbackID callback, uint32 param1, uint32 param2, HouseID house_id, Town *town, TileIndex tile, bool not_yet_constructed, uint8 initial_random_bits)
{
ResolverObject object;
const SpriteGroup *group;
assert(IsValidTile(tile) && (not_yet_constructed || IsTileType(tile, MP_HOUSE)));
NewHouseResolver(&object, house_id, tile, town);
object.callback = callback;
object.callback_param1 = param1;
object.callback_param2 = param2;
object.u.house.not_yet_constructed = not_yet_constructed;
object.u.house.initial_random_bits = initial_random_bits;
group = SpriteGroup::Resolve(HouseSpec::Get(house_id)->grf_prop.spritegroup[0], &object);
if (group == NULL) return CALLBACK_FAILED;
return group->GetCallbackResult();
}
static void DrawTileLayout(const TileInfo *ti, const TileLayoutSpriteGroup *group, byte stage, HouseID house_id)
{
const DrawTileSprites *dts = group->ProcessRegisters(&stage);
const HouseSpec *hs = HouseSpec::Get(house_id);
PaletteID palette = hs->random_colour[TileHash2Bit(ti->x, ti->y)] + PALETTE_RECOLOUR_START;
if (HasBit(hs->callback_mask, CBM_HOUSE_COLOUR)) {
uint16 callback = GetHouseCallback(CBID_HOUSE_COLOUR, 0, 0, house_id, Town::GetByTile(ti->tile), ti->tile);
if (callback != CALLBACK_FAILED) {
/* If bit 14 is set, we should use a 2cc colour map, else use the callback value. */
palette = HasBit(callback, 14) ? GB(callback, 0, 8) + SPR_2CCMAP_BASE : callback;
}
}
SpriteID image = dts->ground.sprite;
PaletteID pal = dts->ground.pal;
if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) image += stage;
if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += stage;
if (GB(image, 0, SPRITE_WIDTH) != 0) {
DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
}
DrawNewGRFTileSeq(ti, dts, TO_HOUSES, stage, palette);
}
void DrawNewHouseTile(TileInfo *ti, HouseID house_id)
{
const HouseSpec *hs = HouseSpec::Get(house_id);
const SpriteGroup *group;
ResolverObject object;
if (ti->tileh != SLOPE_FLAT) {
bool draw_old_one = true;
if (HasBit(hs->callback_mask, CBM_HOUSE_DRAW_FOUNDATIONS)) {
/* Called to determine the type (if any) of foundation to draw for the house tile */
uint32 callback_res = GetHouseCallback(CBID_HOUSE_DRAW_FOUNDATIONS, 0, 0, house_id, Town::GetByTile(ti->tile), ti->tile);
draw_old_one = (callback_res != 0);
}
if (draw_old_one) DrawFoundation(ti, FOUNDATION_LEVELED);
}
NewHouseResolver(&object, house_id, ti->tile, Town::GetByTile(ti->tile));
group = SpriteGroup::Resolve(hs->grf_prop.spritegroup[0], &object);
if (group == NULL || group->type != SGT_TILELAYOUT) {
return;
} else {
/* Limit the building stage to the number of stages supplied. */
const TileLayoutSpriteGroup *tlgroup = (const TileLayoutSpriteGroup *)group;
byte stage = GetHouseBuildingStage(ti->tile);
DrawTileLayout(ti, tlgroup, stage, house_id);
}
}
/* Simple wrapper for GetHouseCallback to keep the animation unified. */
uint16 GetSimpleHouseCallback(CallbackID callback, uint32 param1, uint32 param2, const HouseSpec *spec, Town *town, TileIndex tile)
{
return GetHouseCallback(callback, param1, param2, spec - HouseSpec::Get(0), town, tile);
}
/** Helper class for animation control. */
struct HouseAnimationBase : public AnimationBase<HouseAnimationBase, HouseSpec, Town, GetSimpleHouseCallback> {
static const CallbackID cb_animation_speed = CBID_HOUSE_ANIMATION_SPEED;
static const CallbackID cb_animation_next_frame = CBID_HOUSE_ANIMATION_NEXT_FRAME;
static const HouseCallbackMask cbm_animation_speed = CBM_HOUSE_ANIMATION_SPEED;
static const HouseCallbackMask cbm_animation_next_frame = CBM_HOUSE_ANIMATION_NEXT_FRAME;
};
void AnimateNewHouseTile(TileIndex tile)
{
const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
if (hs == NULL) return;
HouseAnimationBase::AnimateTile(hs, Town::GetByTile(tile), tile, HasBit(hs->extra_flags, CALLBACK_1A_RANDOM_BITS));
}
void AnimateNewHouseConstruction(TileIndex tile)
{
const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
if (HasBit(hs->callback_mask, CBM_HOUSE_CONSTRUCTION_STATE_CHANGE)) {
HouseAnimationBase::ChangeAnimationFrame(CBID_HOUSE_CONSTRUCTION_STATE_CHANGE, hs, Town::GetByTile(tile), tile, 0, 0);
}
}
bool CanDeleteHouse(TileIndex tile)
{
const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
/* Humans are always allowed to remove buildings, as is water and
* anyone using the scenario editor. */
if (Company::IsValidHumanID(_current_company) || _current_company == OWNER_WATER || _current_company == OWNER_NONE) {
return true;
}
if (HasBit(hs->callback_mask, CBM_HOUSE_DENY_DESTRUCTION)) {
uint16 callback_res = GetHouseCallback(CBID_HOUSE_DENY_DESTRUCTION, 0, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
return (callback_res == CALLBACK_FAILED || callback_res == 0);
} else {
return !(hs->extra_flags & BUILDING_IS_PROTECTED);
}
}
static void AnimationControl(TileIndex tile, uint16 random_bits)
{
const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
uint32 param = (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) ? (GB(Random(), 0, 16) | random_bits << 16) : Random();
HouseAnimationBase::ChangeAnimationFrame(CBID_HOUSE_ANIMATION_START_STOP, hs, Town::GetByTile(tile), tile, param, 0);
}
}
bool NewHouseTileLoop(TileIndex tile)
{
const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
if (GetHouseProcessingTime(tile) > 0) {
DecHouseProcessingTime(tile);
return true;
}
TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP);
if (hs->building_flags & BUILDING_HAS_1_TILE) TriggerHouse(tile, HOUSE_TRIGGER_TILE_LOOP_TOP);
if (HasBit(hs->callback_mask, CBM_HOUSE_ANIMATION_START_STOP)) {
/* If this house is marked as having a synchronised callback, all the
* tiles will have the callback called at once, rather than when the
* tile loop reaches them. This should only be enabled for the northern
* tile, or strange things will happen (here, and in TTDPatch). */
if (hs->extra_flags & SYNCHRONISED_CALLBACK_1B) {
uint16 random = GB(Random(), 0, 16);
if (hs->building_flags & BUILDING_HAS_1_TILE) AnimationControl(tile, random);
if (hs->building_flags & BUILDING_2_TILES_Y) AnimationControl(TILE_ADDXY(tile, 0, 1), random);
if (hs->building_flags & BUILDING_2_TILES_X) AnimationControl(TILE_ADDXY(tile, 1, 0), random);
if (hs->building_flags & BUILDING_HAS_4_TILES) AnimationControl(TILE_ADDXY(tile, 1, 1), random);
} else {
AnimationControl(tile, 0);
}
}
/* Check callback 21, which determines if a house should be destroyed. */
if (HasBit(hs->callback_mask, CBM_HOUSE_DESTRUCTION)) {
uint16 callback_res = GetHouseCallback(CBID_HOUSE_DESTRUCTION, 0, 0, GetHouseType(tile), Town::GetByTile(tile), tile);
if (callback_res != CALLBACK_FAILED && GB(callback_res, 0, 8) > 0) {
ClearTownHouse(Town::GetByTile(tile), tile);
return false;
}
}
SetHouseProcessingTime(tile, hs->processing_time);
MarkTileDirtyByTile(tile);
return true;
}
static void DoTriggerHouse(TileIndex tile, HouseTrigger trigger, byte base_random, bool first)
{
ResolverObject object;
/* We can't trigger a non-existent building... */
assert(IsTileType(tile, MP_HOUSE));
HouseID hid = GetHouseType(tile);
HouseSpec *hs = HouseSpec::Get(hid);
if (hs->grf_prop.spritegroup == NULL) return;
NewHouseResolver(&object, hid, tile, Town::GetByTile(tile));
object.callback = CBID_RANDOM_TRIGGER;
object.trigger = trigger;
const SpriteGroup *group = SpriteGroup::Resolve(hs->grf_prop.spritegroup[0], &object);
if (group == NULL) return;
byte new_random_bits = Random();
byte random_bits = GetHouseRandomBits(tile);
uint32 reseed = object.GetReseedSum(); // The scope only affects triggers, not the reseeding
random_bits &= ~reseed;
random_bits |= (first ? new_random_bits : base_random) & reseed;
SetHouseRandomBits(tile, random_bits);
switch (trigger) {
case HOUSE_TRIGGER_TILE_LOOP:
/* Random value already set. */
break;
case HOUSE_TRIGGER_TILE_LOOP_TOP:
if (!first) {
/* The top tile is marked dirty by the usual TileLoop */
MarkTileDirtyByTile(tile);
break;
}
/* Random value of first tile already set. */
if (hs->building_flags & BUILDING_2_TILES_Y) DoTriggerHouse(TILE_ADDXY(tile, 0, 1), trigger, random_bits, false);
if (hs->building_flags & BUILDING_2_TILES_X) DoTriggerHouse(TILE_ADDXY(tile, 1, 0), trigger, random_bits, false);
if (hs->building_flags & BUILDING_HAS_4_TILES) DoTriggerHouse(TILE_ADDXY(tile, 1, 1), trigger, random_bits, false);
break;
}
}
void TriggerHouse(TileIndex t, HouseTrigger trigger)
{
DoTriggerHouse(t, trigger, 0, true);
}
/**
* Resolve a house's spec and such so we can get a variable.
* @param ro The resolver object to fill.
* @param index The house tile to get the data from.
*/
void GetHouseResolver(ResolverObject *ro, uint index)
{
NewHouseResolver(ro, GetHouseType(index), index, Town::GetByTile(index));
}
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