int City::get_net_resource_production(Resource res)
{
return get_gross_resource_production(res) - get_resource_consumption(res);
}
void AI_city::init_demands()
{
// At the bottom of this function, we reduce each demand value by the amount we
// produce. We'll do food & gold after this reduction!
// Demand for gold is always infinite. We just love the stuff!
resource_demand[RES_GOLD] = INFINITE_RESOURCE;
// We always want to have a healthy production of wood and stone, to help us
// build more stuff!
resource_demand[RES_WOOD] = 25;
resource_demand[RES_STONE] = 25;
// Go through all buildings and find anything we need for recipes.
for (std::map<Building_type,int>::iterator it = buildings_built.begin();
it != buildings_built.end();
it++) {
Building_type type = it->first;
Building_datum* build_dat = Building_data[type];
// Here, "amount" refers to the amount of workers at this building type.
int workers = it->second * build_dat->jobs.amount;
for (int i = 0; i < build_dat->recipes.size(); i++) {
Recipe rec = build_dat->recipes[i];
for (int n = 0; n < rec.resource_ingredients.size(); n++) {
Resource_amount res_amt = rec.resource_ingredients[n];
res_amt.amount *= workers;
resource_demand[res_amt.type] += res_amt.amount;
}
for (int n = 0; n < rec.mineral_ingredients.size(); n++) {
Mineral_amount min_amt = rec.mineral_ingredients[n];
min_amt.amount *= workers;
mineral_demand[min_amt.type] += min_amt.amount;
}
}
}
// We might also demand luxuries! First, pick what we like.
for (int i = CIT_PEASANT; i < CIT_BURGHER; i++) {
population[i].pick_luxuries(this);
}
// Now, set up demand for all luxuries.
for (int i = 0; i < RES_MAX; i++) {
Resource res = Resource(i);
Resource_datum* res_dat = Resource_data[i];
if (res_dat->morale > 0) {
int total_demand = 0;
for (int n = CIT_PEASANT; n < CIT_BURGHER; n++) {
int demand = (res_dat->demand * population[n].count) / 100;
Luxury_type lux_type = res_dat->luxury_type;
if (lux_type != LUX_NULL &&
population[n].luxury_demands[lux_type] != res) {
demand *= 0.5;
}
total_demand += demand;
}
resource_demand[res] += total_demand;
}
}
// Now reduce all demands by the amount we produce.
for (int i = 0; i < RES_MAX; i++) {
Resource res = Resource(i);
int produced = get_gross_resource_production(res);
if (resource_demand.count(res) && resource_demand[res] > 0) {
if (resource_demand[res] < produced) {
resource_demand.erase(res);
} else {
resource_demand[res] -= produced;
}
}
}
for (int i = 0; i < MINERAL_MAX; i++) {
Mineral min = Mineral(i);
int produced = (mineral_production.count(min) ? mineral_production[min] :0);
if (mineral_demand.count(min) && mineral_demand[min] > 0) {
if (mineral_demand[min] < produced) {
mineral_demand.erase(min);
} else {
mineral_demand[min] -= produced;
}
}
}
// We always want gold! We just love the stuff!
resource_demand[RES_GOLD] = INFINITE_RESOURCE;
// Food demand is equivalent to 110% of our food deficit.
int net_food = get_net_food();
if (net_food < 0) {
resource_demand[RES_FOOD] = 1.1 * (0 - net_food);
}
}