Understanding PREEXIT system
----------------------------
SetPreExitValue: SetPreExitValue(e,value) -- where e is the entity and a value of 2 will exit preexit function
function ai_melee_animmove_init(e)
 SetPreExitValue(e,0) -- set this to zero to clear out this value for the entity
end
function ai_melee_animmove_preexit(e)
 SetPreExitValue(e,1) -- setting this to one will ensure we keep calling preexit over and over
 if module_combatmelee.preexit(e,ai_movetype_useanim) == 1 then
  SetPreExitValue(e,2) -- when we set this to two, we instruct the engine to stop calling preexit and go to _exit
 end
end
function ai_melee_animmove_exit(e)
 module_combatmelee.exit(e)
end

-- AI : Melee Guard Behavior
module_combatmelee = require "scriptbank\\ai\\module_combatmelee"
function ai_melee_animmove_init(e)
 module_combatmelee.init(e,ai_combattype_freezermelee,ai_movetype_useanim)
 SetPreExitValue(e,0)
end
function ai_melee_animmove_main(e)
 module_combatmelee.main(e,ai_combattype_freezermelee,ai_movetype_useanim)
end
function ai_melee_animmove_preexit(e)
 SetPreExitValue(e,1)
 if module_combatmelee.preexit(e,ai_movetype_useanim) == 1 then
  SetEntityHealth(e,200)
  module_combatmelee.init(e,ai_combattype_freezermelee,ai_movetype_useanim)
 SetPreExitValue(e,0)
  --SetPreExitValue(e,2)
 end
end
function ai_melee_animmove_exit(e)
 module_combatmelee.exit(e)
end

-- AI : Soldier Behavior
-- some arrays
starting_point_x = {}
starting_point_y = {}
starting_point_z = {}
respawn_counter = {}

function ai_soldier_init(e)
	-- init your AI here for example
	starting_point_x[e] = g_Entity[e]['x']
	starting_point_y[e] = g_Entity[e]['y']+1
	starting_point_z[e] = g_Entity[e]['z']
	respawn_counter[e] = 5
        SetPreExitValue(e,0)
end
function ai_soldier_main(e)
	-- main method
end

function ai_soldier_preexit(e)
 SetPreExitValue(e,1)
 if respawn_counter[e] < 1 then 
 	SetPreExitValue(e,2)
 else
	 if ragdoll_is_finished == true then
	  -- reset your AI values here. Like combat state/death state/health/position (so he idles/patrol again)
	  SetPreExitValue(e,0)
	  respawn_counter[e] = respawn_counter[e] - 1
	 end
  end
end

function ai_soldier_exit(e)
	-- AI get removed from the engine
end