54 lines
2.3 KiB
JavaScript
54 lines
2.3 KiB
JavaScript
// Indicators and economy variables move toward a target each day:
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// target = start value + sum of weighted deviations from the start state + active biases
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// Because every term is a deviation from the scenario start, the start is an equilibrium.
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import { IND_IDS, VAR_IDS, clamp } from "./state.js";
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import { biasFor } from "./modifiers.js";
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import { nextNoise } from "./rng.js";
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function computeTarget(def, base, group, key, state, devs, bal) {
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let t = base;
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const gain = group === "ind" ? bal.gain ?? 1 : 1;
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for (const [id, w] of Object.entries(def.sectors ?? {})) {
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t += gain * w * (state.sectors[id].quality - state.ref.sectors[id]);
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}
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// Going big pays off: extra weight for quality above `from` (excess) or below it (short).
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for (const [id, [from, w]] of Object.entries(def.excess ?? {})) t += w * Math.max(0, state.sectors[id].quality - from);
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for (const [id, [from, w]] of Object.entries(def.short ?? {})) t -= w * Math.max(0, from - state.sectors[id].quality);
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for (const [k, w] of Object.entries(def.world ?? {})) t += w * state.world[k];
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if (def.drift) t += ((def.drift * (bal.driftScale ?? 1)) * state.day) / 365;
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for (const [id, w] of Object.entries(def.alloc ?? {})) {
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const s = state.sectors[id];
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t += w * (s.alloc / s.need - state.ref.ratio[id]);
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}
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for (const [k, w] of Object.entries(def.econ ?? {})) {
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t += w * (devs[k] - state.ref.dev[k]);
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}
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for (const [k, w] of Object.entries(def.ind ?? {})) {
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t += w * (state.indicators[k] - state.ref.ind[k]);
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}
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return t + biasFor(state, group, key);
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}
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export function stepVars(state, bal, devs) {
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const next = {};
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for (const id of VAR_IDS) {
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const def = bal.vars[id];
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const target = computeTarget(def, state.ref.vars[id], "var", id, state, devs, bal);
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const v = state.economy[id];
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next[id] = clamp(v + (target - v) / def.tau + nextNoise(state, def.noise), def.min, def.max);
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}
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Object.assign(state.economy, next);
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}
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export function stepIndicators(state, bal, devs) {
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const next = {};
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for (const id of IND_IDS) {
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const def = bal.indicators[id];
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const target = computeTarget(def, state.ref.ind[id], "ind", id, state, devs, bal);
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const v = state.indicators[id];
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next[id] = clamp(v + (target - v) / def.tau + nextNoise(state, def.noise ?? bal.noise.indicator), 0, 100);
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}
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Object.assign(state.indicators, next);
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}
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