log + drawLine

packages/core/drawLine.mjs

@@ -0,0 +1,24 @@
+import { gcd } from './fraction.mjs';
+
+function drawLine(pat) {
+  let s = '';
+  let c = 0;
+  while (s.length < 60) {
+    const haps = pat.queryArc(c, c + 1);
+    const durations = haps.map((hap) => hap.duration);
+    const totalSlots = gcd(...durations).inverse();
+    haps.forEach((hap) => {
+      const duration = hap.whole.end.sub(hap.whole.begin);
+      const slots = totalSlots.mul(duration);
+      s += Array(slots.valueOf())
+        .fill()
+        .map((_, i) => (!i ? hap.value : '-'))
+        .join('');
+    });
+    s += '|';
+    ++c;
+  }
+  return s;
+}
+
+export default drawLine;