random doodads in an area/ random doodads at certain spots

[DaneTheBeast]

How did creators of Farmer vs hunter and Infection Attack make is that some trees and other things randomly generate each time a map starts?

 

[Chaosy]

I've done some simple terrain generation myself back in the day.
loop
set loc = random location in playable map
spawn tree at loc
end of loop

I've not played those two specifically so I can't give you an exact answer on how they did it.

 

[rulerofiron99]

Feel free to take at look at my method used in a TD and in the Dead Lab map in my signature.

It's quite simple:
- Loop through every tile in the map (set x = x + 128, do something, rerun trigger, set y = y + 128 if you reach the side of the map and reset x)
- At every location, give it a random terrain type and use chance to determine which (if any) doodad to spawn.

There are lots of different approaches you can take based on what you want to make.