docstr: update the mesh and shift the noise each time
docstr_tok: ["update","the","mesh","and","shift","the","noise","each","time"]
code: def update(self):
      """
      update the mesh and shift the noise each time
      """
  
      wf_data = self.stream.read(self.CHUNK)
  
      verts, faces, colors = self.mesh(
          offset=self.offset, wf_data=wf_data
      )
      self.mesh1.setMeshData(
          vertexes=verts, faces=faces, faceColors=colors
      )
      self.offset -= 0.05
  
file_path: audio-spectrum-analyzer/terrain_audio.py
imports: import numpy
  from opensimplex import OpenSimplex
  import pyqtgraph.opengl
  from pyqtgraph.Qt import QtCore, QtGui
  import struct
  import pyaudio
  import sys
label_desc: Use image node_id 3 for calling the Terrain obj's underlying member method code with example usage: obj.update() without return types