landing

benchmarks/metrics.ts

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+import type { FlooringPlan, FlooringSettings, SkirtingPlan } from '../src/lib/types';
+
+/** Evaluate public plan output. Keep these definitions fixed when comparing search changes. */
+export function flooringMetrics(plan: FlooringPlan, s: FlooringSettings) {
+  let shapingCuts = 0;
+  let ripCuts = 0;
+  let patternPenalty = 0;
+  let repeats = 0;
+  let similarSteps = 0;
+  let staircases = 0;
+  for (const piece of plan.pieces) {
+    ripCuts += piece.ripEdge === 'both' ? 2 : Number(!!piece.ripEdge);
+    if (!piece.shaped) continue;
+    const close = (a: number, b: number) => Math.abs(a - b) <= 0.01;
+    shapingCuts += piece.template.filter((p, i, path) => {
+      const q = path[(i + 1) % path.length];
+      return !(
+        (close(p.x, q.x) && (close(p.x, 0) || close(p.x, piece.length))) ||
+        (close(p.y, q.y) && (close(p.y, 0) || close(p.y, piece.width)))
+      );
+    }).length;
+  }
+  const history = new Map<string, number[]>();
+  const step = (from: number, to: number) => {
+    const value = (((to - from + s.length / 2) % s.length) + s.length) % s.length;
+    return ((Math.round(value * 1000) / 1000) % s.length) - s.length / 2;
+  };
+  const similar = Math.max(s.kerf * 2, s.length * 0.03);
+  for (const row of s.pattern === 'random' ? plan.rows : []) {
+    const recent = history.get(row.roomId) ?? [];
+    const phase = row.offset;
+    if (recent.length >= 2) {
+      const movement = step(recent.at(-1)!, phase);
+      const previous = step(recent.at(-2)!, recent.at(-1)!);
+      patternPenalty += Number(Math.abs(Math.abs(movement) - s.length / 2) <= 0.01);
+      for (let distance = 2; distance <= recent.length; distance++) {
+        if (Math.abs(step(recent.at(-distance)!, phase)) <= similar) {
+          patternPenalty += 5 - distance;
+          if (distance === 2) repeats++;
+        }
+      }
+      if (movement * previous > 0) {
+        patternPenalty++;
+        if (Math.abs(movement - previous) <= similar) {
+          patternPenalty += 3;
+          similarSteps++;
+        }
+        if (recent.length >= 3 && previous * step(recent.at(-3)!, recent.at(-2)!) > 0) {
+          patternPenalty += 2;
+          staircases++;
+        }
+      }
+    }
+    history.set(row.roomId, [...recent, phase].slice(-4));
+  }
+  return {
+    cuts: plan.cuts,
+    shapingCuts,
+    ripCuts,
+    patternPenalty,
+    repeats,
+    similarSteps,
+    staircases,
+    boards: plan.boardCount,
+    waste: plan.wasteArea,
+    errors: plan.issues.filter((issue) => issue.severity === 'error').length,
+  };
+}
+
+export function skirtingMetrics(plan: SkirtingPlan) {
+  return {
+    cuts: plan.cuts,
+    pieces: plan.pieces.length,
+    boards: plan.stockCount,
+    waste: Math.round(plan.waste * 1000) / 1000,
+    errors: plan.issues.filter((issue) => issue.severity === 'error').length,
+  };
+}
+
+export function compareFlooring(
+  a: ReturnType<typeof flooringMetrics>,
+  b: typeof a,
+  random = false,
+) {
+  return (
+    a.errors - b.errors ||
+    (random ? a.patternPenalty - b.patternPenalty : 0) ||
+    a.cuts - b.cuts ||
+    a.shapingCuts - b.shapingCuts ||
+    a.ripCuts - b.ripCuts ||
+    a.patternPenalty - b.patternPenalty ||
+    a.boards - b.boards
+  );
+}
+
+export function compareSkirting(a: ReturnType<typeof skirtingMetrics>, b: typeof a) {
+  return a.errors - b.errors || a.cuts - b.cuts || a.waste - b.waste;
+}