Ballistics v2 draft

code/modules/projectiles/guns/projectile/ballistics_ch.dm

@@ -105,6 +105,7 @@
 	bolt_name="charging handle"
 	auto_loading_type = CLOSED_BOLT | LOCK_OPEN_EMPTY | CHAMBER_ON_RELOAD
 	bolt_release = null
+	muzzle_velocity = 853
 
 /obj/item/weapon/gun/projectile/revolvingrifle
 	manual_chamber = FALSE

code/modules/projectiles/guns/projectile_ch.dm

@@ -14,6 +14,10 @@
 #define BOLT_CASING_EJECTED 16
 #define BOLT_CASING_CHAMBERED 32
 
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+////////////// CADYN'S BALLISTICS ////////////////////////////////////////////////////////////////////////// ORIGINAL FROM CHOMPSTATION ////////
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
 /obj/item/weapon/gun/projectile
 	var/manual_chamber = TRUE
 	var/auto_loading_type = CLOSED_BOLT | LOCK_MANUAL_LOCK | LOCK_SLAPPABLE
@@ -21,6 +25,7 @@
 	var/bolt_open = FALSE
 	var/bolt_locked = FALSE
 	var/bolt_release = "bolt release"
+	var/muzzle_velocity = 500	// meters per second
 
 /obj/item/weapon/gun/projectile/handle_post_fire(mob/user, atom/target, var/pointblank=0, var/reflex=0)
 	if(fire_anim)
@@ -415,4 +420,11 @@
 	set category = "Object"
 	set src in view(1)
 
-	switch_firemodes(usr)
+	switch_firemodes(usr)
+
+/obj/item/weapon/gun/projectile/process_accuracy(obj/projectile, mob/living/user, atom/target, var/burst, var/held_twohanded)
+	. = ..()
+	var/obj/item/projectile/bullet/P = projectile
+	if(!istype(P))
+		return
+	P.velocity = muzzle_velocity

code/modules/projectiles/projectile.dm

@@ -581,6 +581,13 @@
 		if(check_penetrate(A))
 			passthrough = TRUE
 		penetrating--
+	//CHOMPEdit Begin
+	var/obj/item/projectile/bullet/this = src
+	if(istype(this))
+		if(!this.velocity)
+			passthrough = FALSE
+			penetrating = 0
+	//CHOMPEdit End
 
 	if(passthrough)
 		trajectory_ignore_forcemove = TRUE

code/modules/projectiles/projectile/bullets_ch.dm

@@ -0,0 +1,25 @@
+#define GRAINS_PER_KG 15432.4
+
+/obj/item/projectile/bullet
+	var/diam = 9	//mm
+	var/velocity = 500	//Meters per second
+	var/hollow_point = FALSE
+	var/grains = 115	//I hope the unit is obvious
+	var/energy	//Joules
+
+/obj/item/projectile/bullet/launch_projectile(atom/target, target_zone, mob/user, params, angle_override, forced_spread = 0)
+	energy = velocity * velocity * (grains / GRAINS_PER_KG)
+	return ..()
+
+/obj/item/projectile/bullet/proc/sub_velocity(var/amount)
+	velocity = max(0,velocity - amount)
+	energy = velocity * velocity * (grains / GRAINS_PER_KG)
+
+/obj/item/projectile/bullet/proc/sub_energy(var/amount)
+	energy = max(0,energy - amount)
+	velocity = sqrt(2*energy/(grains / GRAINS_PER_KG))
+
+/obj/item/projectile/bullet/rifle/a762
+	diam = 7.62
+	velocity = 700
+	grains = 123