19 lines
728 B
JavaScript
19 lines
728 B
JavaScript
// The world outside the country: a slow business cycle with occasional shocks (global
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// slumps, rare booms). It moves growth and inflation, so even a perfect budget meets
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// good and bad years. state.world.cycle is roughly -4 (deep global recession) to +4.
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import { clamp } from "./state.js";
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import { nextFloat, nextNoise } from "./rng.js";
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export function stepWorld(state, bal) {
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const w = bal.world;
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const s = state.world;
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s.cycle -= s.cycle / w.tau;
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s.cycle += nextNoise(state, w.noise);
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if (nextFloat(state) < w.shockChancePerDay) {
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const size = w.shock * (0.6 + 0.8 * nextFloat(state));
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s.cycle += nextFloat(state) < w.boomShare ? size * 0.6 : -size;
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}
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s.cycle = clamp(s.cycle, -w.max, w.max);
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}
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