docs: function pointsArray (buf, offset, numPoints) {
      var pointsData = []
      for (var i = offset; i < offset + numPoints * 12; i += 12) {
        pointsData.push([buf.readFloatLE(i + 0), buf.readFloatLE(i + 4), buf.readFloatLE(i + 8)])
      }
      return pointsData
    }