PRE-REFINEMENTS

tools/stack-render.mjs

@@ -0,0 +1,33 @@
+#!/usr/bin/env node
+/* stack-render.mjs — render an acrylic-stack plan to per-plane SVGs.
+   usage: node tools/stack-render.mjs <plan.mjs> [outDir]
+   Writes plane-NN-<sheet>-<face>.svg + manifest.json for the simulator
+   (fable/stack/simulator.html?c=<id>). */
+import { mkdirSync, writeFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import { pathToFileURL } from 'node:url';
+import { renderStack, planeDepths } from '../src/render/stack.js';
+
+const [planPath, outArg] = process.argv.slice(2);
+if (!planPath) { console.error('usage: node tools/stack-render.mjs <plan.mjs> [outDir]'); process.exit(1); }
+
+const plan = (await import(pathToFileURL(resolve(planPath)).href)).default;
+const outDir = resolve(outArg || `fable/stack/candidates/${plan.id}`);
+mkdirSync(outDir, { recursive: true });
+
+const { planes } = renderStack(plan);
+const zmm = planeDepths(plan);
+
+const manifest = {
+  id: plan.id, title: plan.title || plan.id, seed: plan.seed,
+  geometry: { thickness: plan.geometry?.thickness ?? 3, gap: plan.geometry?.gap ?? 6 },
+  planes: [],
+};
+planes.forEach((p, i) => {
+  const file = `plane-${String(i).padStart(2, '0')}-${p.sheet}-${p.face}.svg`;
+  writeFileSync(`${outDir}/${file}`, p.svg);
+  manifest.planes.push({ file, sheet: p.sheet, face: p.face, zmm: zmm[i], label: p.label });
+  console.log(`  ${file}  z=${zmm[i]}mm  ${p.label}`);
+});
+writeFileSync(`${outDir}/manifest.json`, JSON.stringify(manifest, null, 2));
+console.log(`→ ${outDir} (${planes.length} planes)`);