class_docstr: **Bases:** :class:`GLGraphicsItem <pyqtgraph.opengl.GLGraphicsItem.GLGraphicsItem>`
  
  Displays volumetric data. 
class_docstr_tok: ["*","*","Bases",":","*","*",":","class",":","`","GLGraphicsItem","<","pyqtgraph.opengl.GLGraphicsItem.GLGraphicsItem",">","`","Displays","volumetric","data","."]
code: def setData(self, data):
      self.data = data
      self._needUpload = True
      self.update()
  
file_path: pyqtgraph/pyqtgraph/opengl/items/GLVolumeItem.py
imports: from OpenGL.GL import *
  import numpy
  from ...Qt import QtGui
  from ..GLGraphicsItem import GLGraphicsItem
label_desc: Use image node_id 2 for calling the GLVolumeItem obj's underlying member method code with example usage: obj.setData(data) without return types