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package bjc.dicelang.dicev2;
import java.util.Random;
import java.util.function.IntSupplier;
/**
* Create a computed die, which gets its values from arbitrary functions.
* @author Ben Culkin
*
*/
public class ComputedDie extends Die {
/**
* The function that provides the number of dice to roll.
*/
public final IntSupplier numDice;
/**
* The function that provides the number of sides for the dice.
*/
public final IntSupplier numSides;
/**
* Whether or not the number of sides should be rolled once per die.
*/
public final boolean rerollSides;
/**
* Create a new computed die.
* @param numDice The number of dice to roll.
* @param numSides The number of sides on the dice.
*/
public ComputedDie(IntSupplier numDice, IntSupplier numSides) {
this(numDice, numSides, false);
}
/**
* Create a new computed die with specified side-roll behavior.
* @param numDice The number of dice to roll.
* @param numSides The number of sides on the dice.
* @param rerollSides Controls whether the number of sides should be rerolled once per die.
*/
public ComputedDie(IntSupplier numDice, IntSupplier numSides, boolean rerollSides) {
super();
this.numDice = numDice;
this.numSides = numSides;
this.rerollSides = rerollSides;
}
/**
* Create a new computed die using a specified number of RNGs.
* @param rnd The RNG to use.
* @param numDice The number of dice to roll.
* @param numSides The number of sides on the dice.
*/
public ComputedDie(Random rnd, IntSupplier numDice, IntSupplier numSides) {
this(rnd, numDice, numSides, false);
}
/**
* Create a new computed die using a specified number of RNGs and side-roll behavior.
* @param rnd The RNG to use.
* @param numDice The number of dice to roll.
* @param numSides The number of sides on the dice.
* @param rerollSides Controls whether the number of sides should be rerolled once per die.
*/
public ComputedDie(Random rnd, IntSupplier numDice, IntSupplier numSides, boolean rerollSides) {
super(rnd);
this.numDice = numDice;
this.numSides = numSides;
this.rerollSides = rerollSides;
}
@Override
public long[] roll() {
int target = numDice.getAsInt();
int sides = numSides.getAsInt();
long[] res = new long[target];
for(int i = 0; i < target; i++) {
res[i] = rng.nextInt(sides) + 1;
if(rerollSides) sides = numSides.getAsInt();
}
return res;
}
@Override
public long rollSingle() {
return rng.nextInt(numSides.getAsInt());
}
/*
* @NOTE
*
* :UnoptimizableDice
*
* Here, we assume that we can't optimize because we have no way
* of knowing that our suppliers will always return the same
* thing. As a matter of fact, they almost always will have that
* behavior, otherwise you wouldn't need ComputedDie.
*/
@Override
public boolean canOptimize() {
return false;
}
@Override
public long optimize() {
throw new UnsupportedOperationException("ComputedDie cannot be optimized");
}
}
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