Thanks to everyone for the answers <img src="{SMILIES_PATH}/icon_e_biggrin.gif" alt=":D" title="Very Happy">
dop2000 The system works; I just have to see the "cost" in% CPU and FPS
brunopalermo Great !! I've modified your example:
-Added a Player Unit (in my game between English and German I have more than 60 units)
-Drag & Drop for player unit (faster check los)
- A Player Unit if in an obstacle, he sees units outside
Do you think it works?
https://drive.google.com/file/d/1owjGls ... sp=sharing
Here is a screenshot of my game