Inherit from CollisionNode

C++ coding using Panda3D
7

thanks!!
but now nothing appears on the screen!
i print all node with render.ls() method. this is the output:

PandaNode render S:(CullFaceAttrib RescaleNormalAttrib ShadeModelAttrib)
  PandaNode camera_group
    Camera camera ( PerspectiveLens )
      PerspectiveLens fov = 39.3201 30
  none myObject (0 solids) T:(pos 0 10 0) (hidden)
    ModelRoot smiley.egg
      GeomNode  (1 geoms: S:(TextureAttrib))

I resolve this inserting path.show() line in main function. But… why do i have to add this line? Why is this imply?

thanks for your helps!