[MIRROR] Overlay lighting component (#469)

* Overlay lighting component (#52413)

Sparks no longer lag, projectile beams move super smoothly, same with mobs and whatnot. This also allows for easy expansion into directional lights, field-of-view, wee-woo rotating lights or whatever.

It does have a downside: things right-clicked or checked through the alt+click tab will show the light overlay:


This is a BYOND limitation, very well worth it IMO.

🆑
add: Smooth movable lighting system implemented. Projectiles, sparks, thrown flashlights or moving mobs with lights should be much smoother and less laggy.
balance: Light sources no longer stack in range, though they still do in intensity.
/🆑

* Overlay lighting component

Co-authored-by: Rohesie <rohesie@gmail.com>

code/modules/hydroponics/grown/ambrosia.dm

@@ -74,6 +74,7 @@
 	desc = "Eating this <i>makes</i> you immortal."
 	icon_state = "ambrosia_gaia"
 	filling_color = rgb(255, 175, 0)
+	light_system = MOVABLE_LIGHT
 	light_range = 3
 	seed = /obj/item/seeds/ambrosia/gaia
 	wine_power = 70

code/modules/hydroponics/plant_genes.dm

@@ -319,8 +319,9 @@
 	return max(S.potency*(rate + 0.01), 0.1)
 
 /datum/plant_gene/trait/glow/on_new(obj/item/reagent_containers/food/snacks/grown/G, newloc)
-	..()
-	G.set_light(glow_range(G.seed), glow_power(G.seed), glow_color)
+	. = ..()
+	G.light_system = MOVABLE_LIGHT
+	G.AddComponent(/datum/component/overlay_lighting, glow_range(G.seed), glow_power(G.seed), glow_color)
 
 /datum/plant_gene/trait/glow/shadow
 	//makes plant emit slightly purple shadows