There is a feature in HTC Vive called the Chaperone. This feature helps the users not escape the boundaries of their play area by displaying something like a grid wall where the bounds are or give a thermal image of the nearby objects in the play area using a front facing camera. This Guide will help you enable and start using the Chaperone feature on your HTC Vive.
Steps to complete the process:
a. On the left navigation find the Settings (near the bottom) button and click it
a. When you open the Camera tab, on the right there will be a checkbox Enable Camera
b. Click on the checkbox to enable the front facing camera
a. After you enable the camera, more settings will appear below it. From there you can choose what permissions the camera will have
■Start SteamVR and wait for it to open up
■ Go to the Settings tab
■ Enable Camera
■ Navigate again to the same place, and select Allow Camera in Dashboard
After this steps the process is successfully finished.