Standard Shrapnell Buff + Shrapnel rocket now shoots directional shra…

…pnell (#7581)

# About the pull request

Increases shrapnell damage accuracy and damage . 
Rockets will now shoot their shrapnell (if they have any) in a 90 angle
facing the objective.

# Explain why it's good for the game

Currently Shrapnell is near useless in combat against both xenos and
humans . this PR aims to make shrapnell more usefull by having greater
accuracy.

The objective of this is having shrapnel have a somewhat consistent
output on dmg . instead of being fully RNG . specially on xenomorph .
currently ingame an entire 200 shrap mortar can land next to you and you
only get about 100 dmg as most of them will miss.

rocket now shoots its shrapnell directionally so the operator doesnt
kill itself and others with it .


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
balance: Shrapnell accuracy and damage increased
balance: Shrapnell now does 60% bonus damage to xenomorphs
balance: Shrapnell slows xenomorphs on hit 
balance: Custom rockets will now shoot their shrapnell on a 90 degree
angle
/:cl:

---------

Co-authored-by: kiVts <[email protected]>

code/datums/ammo/rocket.dm

@@ -288,6 +288,7 @@
 		if(rocket.fuel && rocket.fuel.reagents.get_reagent_amount(rocket.fuel_type) >= rocket.fuel_requirement)
 			rocket.forceMove(projectile.loc)
 		rocket.warhead.cause_data = projectile.weapon_cause_data
+		rocket.warhead.dir = get_dir(launcher, atom)
 		rocket.warhead.prime()
 		qdel(rocket)
 	smoke.set_up(1, get_turf(atom))

code/datums/ammo/shrapnel.dm

@@ -6,25 +6,27 @@
 /datum/ammo/bullet/shrapnel
 	name = "shrapnel"
 	icon_state = "buckshot"
-	accurate_range_min = 5
 	flags_ammo_behavior = AMMO_BALLISTIC|AMMO_STOPPED_BY_COVER
-
-	accuracy = HIT_ACCURACY_TIER_3
-	accurate_range = 32
-	max_range = 8
-	damage = 25
-	damage_var_low = -PROJECTILE_VARIANCE_TIER_6
-	damage_var_high = PROJECTILE_VARIANCE_TIER_6
-	penetration = ARMOR_PENETRATION_TIER_4
+	accuracy = HIT_ACCURACY_TIER_4
+	accurate_range = 7
+	max_range = 10
+	damage = 30
+	penetration = ARMOR_PENETRATION_TIER_2
 	shell_speed = AMMO_SPEED_TIER_2
-	shrapnel_chance = 5
 
 /datum/ammo/bullet/shrapnel/on_hit_obj(obj/O, obj/projectile/P)
 	if(istype(O, /obj/structure/barricade))
 		var/obj/structure/barricade/B = O
-		B.health -= rand(2, 5)
+		B.health -= rand(5, 10)
 		B.update_health(1)
 
+/datum/ammo/bullet/shrapnel/on_hit_mob(mob/living/carbon/xeno, obj/projectile/projectile, mob/user)
+	if(!shrapnel_chance) // no shrapnell , no special effects
+		return
+	if(isxeno(xeno))
+		xeno.apply_effect(4, SLOW) // multiple hits dont stack they just renew the duration
+		xeno.apply_armoured_damage(damage * 0.6, ARMOR_BULLET, BRUTE, , penetration) // xenos have a lot of HP
+
 /datum/ammo/bullet/shrapnel/rubber
 	name = "rubber pellets"
 	icon_state = "rubber_pellets"
@@ -39,7 +41,7 @@
 	name = ".22 hornet round"
 	icon_state = "hornet_round"
 	flags_ammo_behavior = AMMO_BALLISTIC
-	damage = 8
+	damage = 10
 	shrapnel_chance = 0
 	shell_speed = AMMO_SPEED_TIER_3//she fast af boi
 	penetration = ARMOR_PENETRATION_TIER_5
@@ -59,10 +61,9 @@
 	name = "flaming shrapnel"
 	icon_state = "beanbag" // looks suprisingly a lot like flaming shrapnel chunks
 	flags_ammo_behavior = AMMO_STOPPED_BY_COVER
-
 	shell_speed = AMMO_SPEED_TIER_1
-	damage = 20
-	penetration = ARMOR_PENETRATION_TIER_4
+	damage = 30
+	penetration = ARMOR_PENETRATION_TIER_10 //molten metal pierces your armor
 
 /datum/ammo/bullet/shrapnel/incendiary/set_bullet_traits()
 	. = ..()
@@ -86,7 +87,6 @@
 /datum/ammo/bullet/shrapnel/metal
 	name = "metal shrapnel"
 	icon_state = "shrapnelshot_bit"
-	flags_ammo_behavior = AMMO_STOPPED_BY_COVER|AMMO_BALLISTIC
 	shell_speed = AMMO_SPEED_TIER_1
 	damage = 30
 	shrapnel_chance = 15

code/game/objects/items/explosives/warhead.dm

@@ -11,6 +11,8 @@
 	icon_state = "warhead_rocket"
 	max_container_volume = 210
 	allow_star_shape = FALSE
+	use_dir = TRUE
+	angle = 90
 	matter = list("metal" = 11250) //3 sheets
 	reaction_limits = list( "max_ex_power" = 220, "base_ex_falloff" = 160,"max_ex_shards" = 80,
 							"max_fire_rad" = 4, "max_fire_int" = 45, "max_fire_dur" = 48,