Accessing a robot camera's display add text

[lucasl84]

Hi,

I'm facing an issue and not actually sure how to solve it even though I've read the documentation for the Display API (found here: Display API

I have a Pedestrian robot which has a camera named camera. The display of this camera is shown in the following screenshot:

I would like to add text to this display, but I don't understand how to reference it from my controller. How to I get an instance of that current display so I can call .drawText? I'm trying to add some text to it. I'm using the Python API. My whole controller is subclassing from Supervisor.

Thanks in advance,
Lucas.

[CoolSpy3]

Webots allows you to display overlays from either cameras or displays. The camera overlay is not modifiable with the display api.

In order to draw on top of a camera feed, you can link a display to the camera and then draw on the display. To do this, create a Display node inside of your robot. You can then access it in your controller with robot.getDevice(). Then, you can make the display show the camera feed with display.attachCamera(). You should then be able to use the other display API functions to modify the image.

Note that you can toggle each overlay from the Overlays tab. Also check out the display sample world File > Open Sample World > samples > devices > display.wbt

[lucasl84]

@CoolSpy3 Thanks for your fast reply and the tips. I will check the example that you are referring to!

[CoolSpy3]

You're welcome; Good luck! I hope you get it working :D