-- ============================================================
--
-- visual_memory_manager.script
--	CoC 1.5b r4 - DoctorX Call of The Zone 1.0
--
--	Modified by: DoctorX
--	Last revised: October 05, 2019
--
-- ============================================================


-- Visual Memory Manager exports
-- by Alundaio

-- called from engine
-- This occurs during the visible check. If value >= visiblity_threshold then object is considered visible
-- warning npc and who can be nil sometimes
function get_visible_value(npc,who,time_delta,time_quant,luminocity,velocity_factor,velocity,distance,object_distance,always_visible_distance)
	distance = distance <= 0 and 0.00001 or distance

	if (level_weathers.bLevelUnderground) then
		luminocity = luminocity + 0.30
	end


	-- ///////////////////////////////////////////////////////////////////////////////////////////////
	--
	-- Make actor more visible if flashlight is on at night
	--
	--	- Modified from Revo Lucas commit 1d557ee 2017-09-15
	--
	--	Added by DoctorX
	--	for DoctorX Call of The Zone 1.0
	--	Last modified October 05, 2019
	--
	-- -----------------------------------------------------------------------------------------------

	-- Increase actor luminocity if flashlight on:
	if ( db.actor ) then
		if ( (who) and (who:id( ) == db.actor:id( )) ) then
			if ( xr_conditions.is_night( who, npc ) or level_weathers.bLevelUnderground ) then
				local torch = db.actor:object( "device_torch" )
				if ( torch and torch:torch_enabled( ) ) then
					luminocity = (luminocity + 0.30)
				end
			end
		end
	end

	-- \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\


	-- unaltered formula
	-- time_delta / time_quant * luminocity * (1 + velocity_factor*velocity) * (distance - object_distance) / (distance - always_visible_distance)

	return time_delta / time_quant * (0.02 + luminocity) * (1 + velocity_factor*velocity) * (distance - object_distance) / distance
end