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BLADE: Use "grow" semantics for population estimate (#1624)

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This changes the way percantage-based population estimates work, so that
they have a similar mechanism to grow(). This allows natural recovery
from 0, and also falling to 0 in finite steps.

This also changes the formula for reducing estimates to est / (1 + p)
instead of est * (1 - p). The latter becomes overpowered at large p,
we've seen this formula issue elsewhere (such as BN modifiers).
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David Walker 2024-09-13 23:41:10 -07:00 committed by GitHub
parent 3d7a6f70d8
commit f39402e8be
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1 changed files with 11 additions and 7 deletions
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18
src/Bladeburner/City.ts
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@ -44,13 +44,17 @@ export class City {
/** @param {number} p - the percentage change, not the multiplier. e.g. pass in p = 5 for 5% */
improvePopulationEstimateByPercentage(p: number, skillMult = 1): void {
p = clampNumber((p * skillMult) / 100);
const diff = Math.abs(this.popEst - this.pop);
// Change would overshoot actual population -> make estimate accurate
if (diff <= p * this.popEst) this.popEst = this.pop;
// Otherwise make estimate closer by n
else if (this.popEst < this.pop) this.popEst = clampNumber(this.popEst * (1 + p), 1);
else this.popEst = clampNumber(this.popEst * (1 - p));
const percentage = clampNumber(p * skillMult);
const m = percentage / 100;
if (this.popEst < this.pop) {
// We use an additive factor so we don't get "stuck" at 0.
const popGrown = (this.popEst + percentage) * (1 + m);
this.popEst = clampNumber(popGrown, 0, this.pop);
} else {
// We use an subtractive factor so we can reach 0 in finite steps.
const popShrunk = (this.popEst - percentage) / (1 + m);
this.popEst = clampNumber(popShrunk, this.pop);
}
}
/**