Generate - generates new random plants on the terrain (while clearing any existing)

Clear - clears all the existing plants

Simulate - plays / stops the simulation

Fire - lights several randomly selected plants

Mode - toggles between various mouse interaction modes:

Add - LMB adds a plant at the clicking point

Remove - LMB removes the plant under the mouse pointer

Toggle Fire - LMB lights / extinguishes fire in the plant under the mouse pointer

Wind speed (slider) - affects the speed of the fire spreading

Wind direction (slider 0-360 + some sort of visual indication in the scene (arrow, line etc.)) - affects the

direction of the fire spreading