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(svn r23408) -Feature: Allow to create subsidies for any combination of source and destination types.

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-Change: Do not rely in TownEffects for awarding subsidies.
replace/41b28d7194a279bdc17475d4fbe2ea6ec885a466
terkhen 13 years ago
parent de0bf0663a
commit 50e08f333a
1 changed files with 187 additions and 76 deletions
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263
src/subsidy.cpp
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@ -164,104 +164,204 @@ static bool CheckSubsidyDuplicate(CargoID cargo, SourceType src_type, SourceID s
return false;
}
static Subsidy *FindSubsidyPassengerRoute()
/** Checks if the source and destination of a subsidy are inside the distance limit.
* @param src_type Type of #src.
* @param src Index of source.
* @param dst_type Type of #dst.
* @param dst Index of destination.
* @return True if they are inside the distance limit.
*/
static bool CheckSubsidyDistance(SourceType src_type, SourceID src, SourceType dst_type, SourceID dst)
{
TileIndex tile_src = (src_type == ST_TOWN) ? Town::Get(src)->xy : Industry::Get(src)->location.tile;
TileIndex tile_dst = (dst_type == ST_TOWN) ? Town::Get(dst)->xy : Industry::Get(dst)->location.tile;
return (DistanceManhattan(tile_src, tile_dst) <= SUBSIDY_MAX_DISTANCE);
}
/** Creates a subsidy with the given parameters.
* @param cid Subsidised cargo.
* @param src_type Type of #src.
* @param src Index of source.
* @param dst_type Type of #dst.
* @param dst Index of destination.
*/
void CreateSubsidy(CargoID cid, SourceType src_type, SourceID src, SourceType dst_type, SourceID dst)
{
Subsidy *s = new Subsidy();
s->cargo_type = cid;
s->src_type = src_type;
s->src = src;
s->dst_type = dst_type;
s->dst = dst;
s->remaining = SUBSIDY_OFFER_MONTHS;
s->awarded = INVALID_COMPANY;
Pair reftype = SetupSubsidyDecodeParam(s, false);
AddNewsItem(STR_NEWS_SERVICE_SUBSIDY_OFFERED, NS_SUBSIDIES, (NewsReferenceType)reftype.a, s->src, (NewsReferenceType)reftype.b, s->dst);
SetPartOfSubsidyFlag(s->src_type, s->src, POS_SRC);
SetPartOfSubsidyFlag(s->dst_type, s->dst, POS_DST);
AI::BroadcastNewEvent(new ScriptEventSubsidyOffer(s->index));
}
/** Tries to create a passenger subsidy between two towns.
* @return True iff the subsidy was created.
*/
bool FindSubsidyPassengerRoute()
{
assert(Subsidy::CanAllocateItem());
if (!Subsidy::CanAllocateItem()) return false;
const Town *src = Town::GetRandom();
if (src->population < SUBSIDY_PAX_MIN_POPULATION ||
src->GetPercentTransported(CT_PASSENGERS) > SUBSIDY_MAX_PCT_TRANSPORTED) {
return NULL;
return false;
}
const Town *dst = Town::GetRandom();
if (dst->population < SUBSIDY_PAX_MIN_POPULATION || src == dst) {
return NULL;
return false;
}
if (DistanceManhattan(src->xy, dst->xy) > SUBSIDY_MAX_DISTANCE) return NULL;
if (CheckSubsidyDuplicate(CT_PASSENGERS, ST_TOWN, src->index, ST_TOWN, dst->index)) return NULL;
if (DistanceManhattan(src->xy, dst->xy) > SUBSIDY_MAX_DISTANCE) return false;
if (CheckSubsidyDuplicate(CT_PASSENGERS, ST_TOWN, src->index, ST_TOWN, dst->index)) return false;
Subsidy *s = new Subsidy();
s->cargo_type = CT_PASSENGERS;
s->src_type = s->dst_type = ST_TOWN;
s->src = src->index;
s->dst = dst->index;
CreateSubsidy(CT_PASSENGERS, ST_TOWN, src->index, ST_TOWN, dst->index);
return s;
return true;
}
static Subsidy *FindSubsidyCargoRoute()
bool FindSubsidyCargoDestination(CargoID cid, SourceType src_type, SourceID src);
/** Tries to create a cargo subsidy with a town as source.
* @return True iff the subsidy was created.
*/
bool FindSubsidyTownCargoRoute()
{
assert(Subsidy::CanAllocateItem());
if (!Subsidy::CanAllocateItem()) return false;
SourceType src_type = ST_TOWN;
/* Select a random town. */
const Town *src_town = Town::GetRandom();
uint32 town_cargo_produced = src_town->cargo_produced;
/* Passenger subsidies are not handled here. */
ClrBit(town_cargo_produced, CT_PASSENGERS);
/* Choose a random cargo that is produced in the town. */
uint8 cargo_number = RandomRange(CountBits(town_cargo_produced));
CargoID cid;
FOR_EACH_SET_CARGO_ID(cid, town_cargo_produced) {
if (cargo_number == 0) break;
cargo_number--;
}
const Industry *i = Industry::GetRandom();
if (i == NULL) return NULL;
/* Avoid using invalid NewGRF cargos. */
if (!CargoSpec::Get(cid)->IsValid()) return false;
/* Quit if the percentage transported is large enough. */
if (src_town->GetPercentTransported(cid) > SUBSIDY_MAX_PCT_TRANSPORTED) return false;
SourceID src = src_town->index;
return FindSubsidyCargoDestination(cid, src_type, src);
}
/** Tries to create a cargo subsidy with an industry as source.
* @return True iff the subsidy was created.
*/
bool FindSubsidyIndustryCargoRoute()
{
if (!Subsidy::CanAllocateItem()) return false;
SourceType src_type = ST_INDUSTRY;
/* Select a random industry. */
const Industry *src_ind = Industry::GetRandom();
if (src_ind == NULL) return false;
CargoID cargo;
uint trans, total;
CargoID cid;
/* Randomize cargo type */
if (i->produced_cargo[1] != CT_INVALID && HasBit(Random(), 0)) {
cargo = i->produced_cargo[1];
trans = i->last_month_pct_transported[1];
total = i->last_month_production[1];
if (src_ind->produced_cargo[1] != CT_INVALID && HasBit(Random(), 0)) {
cid = src_ind->produced_cargo[1];
trans = src_ind->last_month_pct_transported[1];
total = src_ind->last_month_production[1];
} else {
cargo = i->produced_cargo[0];
trans = i->last_month_pct_transported[0];
total = i->last_month_production[0];
cid = src_ind->produced_cargo[0];
trans = src_ind->last_month_pct_transported[0];
total = src_ind->last_month_production[0];
}
/* Quit if no production in this industry
* or if the pct transported is already large enough */
if (total == 0 || trans > SUBSIDY_MAX_PCT_TRANSPORTED || cargo == CT_INVALID) return NULL;
if (total == 0 || trans > SUBSIDY_MAX_PCT_TRANSPORTED || cid == CT_INVALID) return false;
/* Don't allow passengers subsidies from industry */
const CargoSpec *cs = CargoSpec::Get(cargo);
if (cs->town_effect == TE_PASSENGERS) return NULL;
SourceID src = src_ind->index;
SourceType dst_type;
SourceID dst;
return FindSubsidyCargoDestination(cid, src_type, src);
}
if (cs->town_effect == TE_GOODS || cs->town_effect == TE_FOOD) {
/* The destination is a town */
dst_type = ST_TOWN;
const Town *t = Town::GetRandom();
/** Tries to find a suitable destination for the given source and cargo.
* @param cid Subsidized cargo.
* @param src_type Type of #src.
* @param src Index of source.
* @return True iff the subsidy was created.
*/
bool FindSubsidyCargoDestination(CargoID cid, SourceType src_type, SourceID src)
{
/* Choose a random destination. Only consider towns if they can accept the cargo. */
SourceType dst_type = (HasBit(_town_cargos_accepted, cid) && Chance16(1, 2)) ? ST_TOWN : ST_INDUSTRY;
/* Only want big towns */
if (t->population < SUBSIDY_CARGO_MIN_POPULATION) return NULL;
SourceID dst;
switch (dst_type) {
case ST_TOWN: {
/* Select a random town. */
const Town *dst_town = Town::GetRandom();
if (DistanceManhattan(i->location.tile, t->xy) > SUBSIDY_MAX_DISTANCE) return NULL;
/* Check if the town can accept this cargo. */
if (!HasBit(dst_town->cargo_accepted_total, cid)) return false;
dst = t->index;
} else {
/* The destination is an industry */
dst_type = ST_INDUSTRY;
const Industry *i2 = Industry::GetRandom();
/* The industry must accept the cargo */
if (i2 == NULL || i == i2 ||
(cargo != i2->accepts_cargo[0] &&
cargo != i2->accepts_cargo[1] &&
cargo != i2->accepts_cargo[2])) {
return NULL;
dst = dst_town->index;
break;
}
if (DistanceManhattan(i->location.tile, i2->location.tile) > SUBSIDY_MAX_DISTANCE) return NULL;
case ST_INDUSTRY: {
/* Select a random industry. */
const Industry *dst_ind = Industry::GetRandom();
/* The industry must accept the cargo */
if (dst_ind == NULL ||
(cid != dst_ind->accepts_cargo[0] &&
cid != dst_ind->accepts_cargo[1] &&
cid != dst_ind->accepts_cargo[2])) {
return false;
}
dst = dst_ind->index;
break;
}
dst = i2->index;
default: NOT_REACHED();
}
if (CheckSubsidyDuplicate(cargo, ST_INDUSTRY, i->index, dst_type, dst)) return NULL;
/* Check that the source and the destination are not the same. */
if (src_type == dst_type && src == dst) return false;
Subsidy *s = new Subsidy();
s->cargo_type = cargo;
s->src_type = ST_INDUSTRY;
s->src = i->index;
s->dst_type = dst_type;
s->dst = dst;
/* Check distance between source and destination. */
if (!CheckSubsidyDistance(src_type, src, dst_type, dst)) return false;
return s;
/* Avoid duplicate subsidies. */
if (CheckSubsidyDuplicate(cid, src_type, src, dst_type, dst)) return false;
CreateSubsidy(cid, src_type, src, dst_type, dst);
return true;
}
void SubsidyMonthlyLoop()
@ -289,26 +389,37 @@ void SubsidyMonthlyLoop()
if (modified) RebuildSubsidisedSourceAndDestinationCache();
/* 25% chance to go on */
if (Subsidy::CanAllocateItem() && Chance16(1, 4)) {
uint n = 1000;
bool passenger_subsidy = false;
bool town_subsidy = false;
bool industry_subsidy = false;
int random_chance = RandomRange(16);
if (random_chance < 2) {
/* There is a 1/8 chance each month of generating a passenger subsidy. */
int n = 1000;
do {
Subsidy *s = FindSubsidyPassengerRoute();
if (s == NULL) s = FindSubsidyCargoRoute();
if (s != NULL) {
s->remaining = SUBSIDY_OFFER_MONTHS;
s->awarded = INVALID_COMPANY;
Pair reftype = SetupSubsidyDecodeParam(s, false);
AddNewsItem(STR_NEWS_SERVICE_SUBSIDY_OFFERED, NS_SUBSIDIES, (NewsReferenceType)reftype.a, s->src, (NewsReferenceType)reftype.b, s->dst);
SetPartOfSubsidyFlag(s->src_type, s->src, POS_SRC);
SetPartOfSubsidyFlag(s->dst_type, s->dst, POS_DST);
AI::BroadcastNewEvent(new ScriptEventSubsidyOffer(s->index));
modified = true;
break;
}
} while (n--);
passenger_subsidy = FindSubsidyPassengerRoute();
} while (!passenger_subsidy && n--);
} else if (random_chance == 2) {
/* Cargo subsidies with a town as a source have a 1/16 chance. */
int n = 1000;
do {
town_subsidy = FindSubsidyTownCargoRoute();
} while (!town_subsidy && n--);
} else if (random_chance == 3) {
/* Cargo subsidies with an industry as a source have a 1/16 chance. */
int n = 1000;
do {
industry_subsidy = FindSubsidyTownCargoRoute();
} while (!industry_subsidy && n--);
}
modified |= passenger_subsidy || town_subsidy || industry_subsidy;
if (modified) InvalidateWindowData(WC_SUBSIDIES_LIST, 0);
}

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