No pointcloud data in the polygon and cloud windows

[lxcstarlet]

Hello!
I used gazebo to build a simulation model with a camera, 16-line lidar, and calibration boards

the gazebo model
After compiling the package and filling out the corresponding configuration file, I found that when the program is running, only the mono8 window displays the camera data, and the polygon and cloud window does not have any point cloud data. What is the reason and how to modify it?

the mono8 window and the cloud and polygon windows
I didn't change the code but just set the corresponding parameters in the configuration file. Below are some drawings.

configuration files

rqt_graph

tf_tree
I will appreciate your help！