code: def keyboard(self, key, x, y):
      # up
      eps = 1
      # print(key)
      if key == b"w":
          self.camera.center += eps * self.camera.direction
      elif key == b"s":
          self.camera.center -= eps * self.camera.direction
      if key == b"a":
          self.camera.center -= eps * self.camera.right
      elif key == b"d":
          self.camera.center += eps * self.camera.right
      if key == b" ":
          self.camera.center += eps * self.camera.up
      elif key == b"x":
          self.camera.center -= eps * self.camera.up
      elif key == b"i":
          self.camera.near += 0.1 * eps
          self.camera.far += 0.1 * eps
      elif key == b"o":
          self.camera.near -= 0.1 * eps
          self.camera.far -= 0.1 * eps
  
      (
          self.projection_matrix,
          self.model_view_matrix,
      ) = self.camera.get_gl_matrix()
  
file_path: pifuhd/lib/render/gl/cam_render.py
imports: from OpenGL.GLUT import *
  from .render import Render
label_desc: Use image node_id 4 for calling the CamRender obj's underlying member method code with example usage: obj.keyboard(key, x, y) without return types