How to start the VISUALIZE_FRUSTUM?

[Idan Aviv]

Hi everyone,
First of all thank you for the great package.
I want to use this package with my Realsense D435i camera (848x480 resolution).
I am trying to figure out the field of view of the depth camera in this resolution, since the fov is not given at this resolution in the formal documentation of the camera.
From reading the documentation and see the video from the event I understood there is a tool called VISUALIZE_FRUSTUM so I could see the frustum and fit it to the proper frustum.
I am not sure how to start this VISUALIZE_FRUSTUM, should I set it in the launch file or is there is certain command I should use ?

[Idan Aviv]

I Figure out I should build the package from source, and build according to this issue #111.