   lineGeometry.attributes.position.array.length * 9
  );
  positions.set(
    lineGeometry.clone()
      .applyMatrix(
        localMatrix.makeScale(1, 1, z)
      )
      .applyMatrix(
        localMatrix.makeRotationFromQuaternion(localQuaternion.setFromAxisAngle(localVector.set(1, 0, 0), Math.PI/2))
      )
      .applyMatrix(
        localMatrix.makeTranslation(size/2, -size/2, 0)
      ).attributes.position.array,
    lineGeometry.attributes.position.array.length * 10
  );
  positions.set(
    lineGeo