Wondering if this is possible

I've been wodering if it's possible to to draw a circle around the turrets. The circle would tell the distance of where the turret would shoot at. If it is possible, can anyone point me in the right direction of doing it? Thanks

Drawing isn't needed, just watch this and get a feeling for the range. Everything else would be to much needless work.

It's possible but you would need to filter out every other unit.
If you unpack the map folders look here :
Map4.zip\LEVELS\Map4\Constants.var
Map4 is just an example.

Then change the constants "ai_DrawXYZ" from 0 to 1.