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Fix crash when calculating formula cost

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Happened when spend resource was false and the formula was non-integrable, but the amount to buy were all going to be summed anyways
This commit is contained in:
thepaperpilot 2023-05-05 19:10:23 -05:00
parent 6786c27b89
commit 4d7f03d543
2 changed files with 40 additions and 21 deletions
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32
src/game/formulas/formulas.ts
View file

@ -1491,33 +1491,35 @@ export function calculateCost(
spendResources = true,
summedPurchases?: number
) {
let newValue = Decimal.add(amountToBuy, unref(formula.innermostVariable) ?? 0);
const origValue = unref(formula.innermostVariable) ?? 0;
let newValue = Decimal.add(amountToBuy, origValue);
const targetValue = newValue;
summedPurchases ??= spendResources ? 10 : 0;
newValue = newValue.sub(summedPurchases).clampMin(origValue);
let cost: DecimalSource = 0;
if (spendResources) {
if (Decimal.gt(amountToBuy, summedPurchases)) {
if (!formula.isIntegrable()) {
throw new Error(
"Cannot calculate cost with spending resources of non-integrable formula"
);
}
const targetValue = newValue;
newValue = newValue
.sub(summedPurchases ?? 10)
.clampMin(unref(formula.innermostVariable) ?? 0);
let cost = Decimal.sub(formula.evaluateIntegral(newValue), formula.evaluateIntegral());
cost = Decimal.sub(formula.evaluateIntegral(newValue), formula.evaluateIntegral());
}
if (targetValue.gt(1e308)) {
// Too large of a number for summedPurchases to make a difference,
// just get the cost and multiply by summed purchases
return cost.add(Decimal.sub(targetValue, newValue).times(formula.evaluate(newValue)));
return Decimal.add(
cost,
Decimal.sub(targetValue, newValue).times(formula.evaluate(newValue))
);
}
for (let i = newValue.toNumber(); i < targetValue.toNumber(); i++) {
cost = cost.add(formula.evaluate(i));
cost = Decimal.add(cost, formula.evaluate(i));
}
return cost;
} else {
const targetValue = newValue;
newValue = newValue
.sub(summedPurchases ?? 0)
.clampMin(unref(formula.innermostVariable) ?? 0);
let cost = formula.evaluate(newValue);
cost = formula.evaluate(newValue);
newValue = newValue.add(1);
if (targetValue.gt(1e308)) {
// Too large of a number for summedPurchases to make a difference,
// just get the cost and multiply by summed purchases
@ -1526,6 +1528,6 @@ export function calculateCost(
for (let i = newValue.toNumber(); i < targetValue.toNumber(); i++) {
cost = Decimal.add(cost, formula.evaluate(i));
}
}
return cost;
}
}

21
tests/game/formulas.test.ts
View file

@ -1089,9 +1089,21 @@ describe("Buy Max", () => {
Decimal.pow(1.05, 141).times(100)
);
});
test("Calculates max affordable and cost correctly with summing last purchases", () => {
const variable = Formula.variable(0);
const formula = Formula.pow(1.05, variable).times(100);
const maxAffordable = calculateMaxAffordable(formula, resource, false, 4);
expect(maxAffordable.value).compare_tolerance(141 - 4);
const actualCost = new Array(4)
.fill(null)
.reduce((acc, _, i) => acc.add(formula.evaluate(133 + i)), new Decimal(0));
const calculatedCost = calculateCost(formula, maxAffordable.value, false, 4);
expect(calculatedCost).compare_tolerance(actualCost);
});
});
describe("With spending", () => {
test("Throws on non-invertible formula", () => {
test("Throws on calculating max affordable of non-invertible formula", () => {
const maxAffordable = calculateMaxAffordable(Formula.abs(10), resource);
expect(() => maxAffordable.value).toThrow();
});
@ -1220,7 +1232,7 @@ describe("Buy Max", () => {
(acc, _, i) => acc.add(formula.evaluate(i + purchases.value)),
new Decimal(0)
);
const calculatedCost = calculateCost(formula, maxAffordable.value, true);
const calculatedCost = calculateCost(formula, maxAffordable.value);
// Since we're summing all the purchases this should be equivalent
expect(calculatedCost).compare_tolerance(actualCost);
});
@ -1235,5 +1247,10 @@ describe("Buy Max", () => {
expect(Decimal.isFinite(calculatedCost)).toBe(true);
resource.value = 100000;
});
test("Handles summing purchases of non-integrable formula", () => {
const purchases = ref(0);
const formula = Formula.variable(purchases).abs();
expect(() => calculateCost(formula, 10)).not.toThrow();
});
});
});