X-ray laser nerf - Falloff and Charge

See here for the main reasoning behind the PR -
https://nanotrasen.se/forum/topic/14790-wanted-unwanted-features-refactors-bugfixes-thread/

code/modules/projectiles/ammunition/energy.dm

@@ -59,7 +59,7 @@
 
 /obj/item/ammo_casing/energy/xray
 	projectile_type = /obj/item/projectile/beam/xray
-	e_cost = 50
+	e_cost = 100
 	fire_sound = 'sound/weapons/laser3.ogg'
 
 /obj/item/ammo_casing/energy/immolator

code/modules/projectiles/guns/energy/laser.dm

@@ -111,7 +111,7 @@
 
 /obj/item/gun/energy/xray
 	name = "xray laser gun"
-	desc = "A high-power laser gun capable of expelling concentrated xray blasts."
+	desc = "A high-power laser gun capable of expelling concentrated xray blasts. These blasts will penetrate solid objects, but will decrease in power the longer they have to travel."
 	icon_state = "xray"
 	origin_tech = "combat=6;materials=4;magnets=4;syndicate=1"
 	ammo_type = list(/obj/item/ammo_casing/energy/xray)

code/modules/projectiles/projectile.dm

@@ -32,6 +32,8 @@
 	animate_movement = 0
 
 	var/damage = 10
+	var/tile_dropoff = 0	//how much damage should be decremented as the bullet moves
+	var/tile_dropoff_s = 0	//same as above but for stamina
 	var/damage_type = BRUTE //BRUTE, BURN, TOX, OXY, CLONE are the only things that should be in here
 	var/nodamage = FALSE //Determines if the projectile will skip any damage inflictions
 	var/flag = "bullet" //Defines what armor to use when it hits things.  Must be set to bullet, laser, energy,or bomb	//Cael - bio and rad are also valid
@@ -60,9 +62,15 @@
 	return ..()
 
 /obj/item/projectile/proc/Range()
-	range--
-	if(range <= 0 && loc)
-		on_range()
+    range--
+    if(damage > 0)
+        damage = max(0, damage - tile_dropoff) // decrement projectile damage based on dropoff value for each tile it moves
+    if(stamina > 0)
+        stamina = max(0, stamina - tile_dropoff_s) // as above, but with stamina
+    if(range <= 0 && loc)
+        on_range()
+    if(damage == 0 && stamina == 0)
+        on_range()
 
 /obj/item/projectile/proc/on_range() //if we want there to be effects when they reach the end of their range
 	qdel(src)

code/modules/projectiles/projectile/beams.dm

@@ -34,6 +34,7 @@
 	name = "xray beam"
 	icon_state = "xray"
 	damage = 15
+	tile_dropoff = 0.75
 	irradiate = 30
 	forcedodge = 1
 	range = 15

code/modules/projectiles/projectile/bullets.dm

@@ -69,17 +69,8 @@
 /obj/item/projectile/bullet/pellet
 	name = "pellet"
 	damage = 12.5
-	var/tile_dropoff = 0.75
-	var/tile_dropoff_s = 1.25
-
-/obj/item/projectile/bullet/pellet/Range()
-	..()
-	if(damage > 0)
-		damage -= tile_dropoff
-	if(stamina > 0)
-		stamina -= tile_dropoff_s
-	if(damage < 0 && stamina < 0)
-		qdel(src)
+	tile_dropoff = 0.75
+	tile_dropoff_s = 1.25
 
 /obj/item/projectile/bullet/pellet/rubber
 	name = "rubber pellet"