39 lines
1.1 KiB
TypeScript
39 lines
1.1 KiB
TypeScript
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import { Condition } from "./parser.ts";
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// inclusive range
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export type MaterialRange = {
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x: [number, number],
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m: [number, number],
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a: [number, number],
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s: [number, number],
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}
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export function partition(cond: Condition, mRange: MaterialRange):
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null | MaterialRange | [MaterialRange, MaterialRange] {
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const [min, max] = mRange[cond.quality];
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if (cond.cond === "<") {
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if (min >= cond.value) return null;
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if (max < cond.value) return mRange;
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return [
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{ // false condition
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...mRange,
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[cond.quality]: [cond.value, max],
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},
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{ // true condition
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...mRange,
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[cond.quality]: [min, cond.value - 1],
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},
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];
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}
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else { // if >
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if (max <= cond.value) return null;
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if (min > cond.value) return mRange;
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return [{ // false condition
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...mRange,
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[cond.quality]: [min, cond.value],
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}, { // true condition
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...mRange,
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[cond.quality]: [cond.value + 1, max],
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}];
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}
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}
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