function classifyRings()

in src/deckgl-layers/3d-building-layer/3d-building-utils.js [150:183]

• 28 lines of code
• 8 McCabe index (conditional complexity)

function classifyRings(rings) {
  const len = rings.length;

  if (len <= 1) return [rings];

  const polygons = [];
  let polygon;
  let ccw;

  for (let i = 0; i < len; i++) {
    const area = signedArea(rings[i]);
    if (area === 0) {
      continue;
    }

    if (ccw === undefined) {
      ccw = area < 0;
    }

    if (ccw === area < 0) {
      if (polygon) {
        polygons.push(polygon);
      }
      polygon = [rings[i]];
    } else {
      polygon.push(rings[i]);
    }
  }
  if (polygon) {
    polygons.push(polygon);
  }

  return polygons;
}