Age of Conquest: Income & Expenses
Due to numerous requests, below is a description of income & expenses in Age of Conquest III. The system is up and running on Android already and will come to PC, Macintosh & Linux soon.
The income and expenses for each turn are calculated as follows:
World world = ... // the world including everything
Entity entity = ... // the empire we are doing the calculations for
// assets
long money = entity.getMoney();
// income: tax
long taxIncome = getTaxIncome(world.getProduction(entity),
entity.getTaxRate(),
entity.getMorale());
money += taxIncome;
// income: vassals
for (Entity vassal: vassals) {
long vassalIncome = getTaxIncome(world.getProduction(vassal),
vassal.getTaxRate(),
vassal.getMorale());
money += getVassalPay(taxIncome);
}
// expenses: economy and military spending
money -= getEconomySpending(taxIncome, entity.getSpendingEconomy()));
money -= getMilitarySpending(world.getMilitary(entity),
entity.getSpendingMilitary()));
// expenses: tributes to vassal masters
for (Entity master: masters) {
money -= getVassalPay(taxIncome);
}
Please note, production is a factor of economy x population.
Utility functions to calculate costs as well as economy, population and military increases/decreases depending on the spending settings chosen.
/** The percent the vassal pays. */
public static final int VASSAL_PAY_PERCENTAGE = 10;
/** The standard economy spending in percent [0, 100]. */
public static final int STANDARD_SPENDING_ECONOMY = 80;
/** The standard military spending in percent [0, 100]. */
public static final int STANDARD_SPENDING_MILITARY = 80;
/**
* Returns the tax for the given number of people.
*
* @param production The production.
* @param taxRate The tax rate in percent [0, 100].
* @param morale The morale in percent [0, 100].
* @return The tax.
*/
public long getTaxIncome(long production, int taxRate, int morale) {
return Math.round(Math.pow(production * 0.08d, 0.96d) * taxRate/10*morale/100);
}
/**
* Returns the payment a vassal slave has to pay to
* his master based on his production.
*
* @param taxIncome The tax income of the vassal slave.
* @return The pay a vassal slave has to pay to his master.
*/
public long getVassalPay(long taxIncome) {
return taxIncome * VASSAL_PAY_PERCENTAGE / 100;
}
/**
* Returns the investment spending for the given tax income.
*
* @param taxIncome The tax income.
* @param economySpending The economy spending.
* @return The expenses.
*/
public long getEconomySpending(long taxIncome, int economySpending) {
return (taxIncome / 10) * economySpending / STANDARD_SPENDING_ECONOMY;
}
/**
* Returns the economy increase for the given spending rate.
*
* @param economySpending The spending.
* @return The increase factor. Stays stable for 1, decreases
* or less than 1 and increases for more than 1.
*/
public float getEconomyIncrease(int economySpending) {
return 1.03f + ((economySpending - Market.STANDARD_SPENDING_ECONOMY) * 0.03f / 100);
}
/**
* Returns the population increase for the given spending rate.
*
* @param economySpending The spending.
* @return The increase factor. Stays stable for 1, decreases
* for less than 1 and increases for more than 1.
*/
public float getPopulationIncrease(int economySpending) {
return 1.01f + (economySpending * 0.001f);
}
/**
* Returns the upkeep cost for the given number of military units.
*
* @param military The military units.
* @param militarySpending The military spending.
* @return The upkeep cost.
*/
public long getMilitarySpending(long military, int militarySpending) {
return (military / 5) * militarySpending / STANDARD_SPENDING_MILITARY;
}
/**
* Returns the military increase for the given spending rate.
*
* @param militarySpending The spending.
* @return The increase factor. Stays stable for 1, decreases
* for less than 1 and increases for more than 1.
*/
public float getMilitaryIncrease(int militarySpending) {
return 1.0f + ((militarySpending - Market.STANDARD_SPENDING_MILITARY) * 0.5f / 100);
}
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