Stepsound "BALANCING"

Changes:
 Humans now use the following ranges:
  - range(6) for running + shoes
  - range(5) for running OR shoes
  - range(4) for not running AND no shoes
 Humans use the following volumes:
  - 13 for running + shoes
  - 9 for running OR shoes
  - 5 for not running AND no shoes
 Humans have special modifiers on steps:
  - Shoes being 'silent' = Silent
   - Noslip shoes are silent by default.
   - You can make any shoe silent by tablecrafting shoe wraps with 10
     ducttape and a wirecutter at a table.
  - Species being 'silent' = Silent
   - Currently, shadowlings use this.
  - Buckled, lying, or being thrown = Silent
  - No feet = Silent
  - No gravity = Footsteps every 3 turfs instead of every 2.

 Xenomorphs now use the following ranges:
  - range(4) at all times.
 Xenomorphs use the following volumes:
  - 5 at all times.
 Xenomorphs have special modifiers on steps:
  - Walking = Silent
  - Buckled, lying, being thrown = Silent
  - No gravity = Footsteps every 3 turfs instead of every 2.

code/modules/clothing/clothing.dm

@@ -304,6 +304,7 @@ BLIND     // can't see anything
 	body_parts_covered = FEET
 	slot_flags = SLOT_FEET
 
+	var/silence_steps = 0
 
 	permeability_coefficient = 0.50
 	slowdown = SHOES_SLOWDOWN

code/modules/clothing/shoes/miscellaneous.dm

@@ -11,6 +11,7 @@
 	var/list/clothing_choices = list()
 	siemens_coefficient = 0.8
 	species_restricted = null
+	silence_steps = 1
 
 /obj/item/clothing/shoes/mime
 	name = "mime shoes"
@@ -165,3 +166,25 @@
 	icon_state = "noble_boot"
 	item_color = "noble_boot"
 	item_state = "noble_boot"
+
+
+/obj/item/clothing/shoes/attackby(obj/item/I, mob/user, params)
+	if(istype(I, /obj/item/shoe_silencer))
+		silence_steps = 1
+		user.unEquip(I)
+		qdel(I)
+	else . = ..()
+
+/obj/item/shoe_silencer
+	name = "shoe rags"
+	desc = "Looks sneaky."
+	icon_state = "sheet-cloth"
+
+/datum/table_recipe/shoe_rags
+	name = "Shoe Rags"
+
+	result = /obj/item/shoe_silencer
+	reqs = list(/obj/item/stack/tape_roll = 10)
+	tools = list(/obj/item/weapon/wirecutters)
+
+	time = 40

code/modules/mob/living/carbon/alien/alien.dm

@@ -304,7 +304,21 @@ Des: Removes all infected images from the alien.
 				if(m_intent == "run")
 					if(!(step_count % 2)) //every other turf makes a sound
 						return 0
-				if(leaping)
-					return 0
-				playsound(T, S, 6, 1, -(world.view/2)) //xenos are quiet fuckers
+
+				var/range = -(world.view - 2)
+				range -= 0.666 //-(7 - 2) = (-5) = -5 | -5 - (0.666) = -5.666 | (7 + -5.666) = 1.334 | 1.334 * 3 = 4.002 | range(4.002) = range(4)
+				var/volume = 5
+
+				if(m_intent == "walk")
+					return 0 //silent when walking
+
+				if(buckled || lying || throwing)
+					return 0 //people flying, lying down or sitting do not step
+
+				if(!has_gravity(src))
+					if(step_count % 3) //this basically says, every three moves make a noise
+						return 0       //1st - none, 1%3==1, 2nd - none, 2%3==2, 3rd - noise, 3%3==0
+
+				playsound(T, S, volume, 1, range)
+				return 1
 	return 0

code/modules/mob/living/carbon/human/human_movement.dm

@@ -91,12 +91,45 @@
 				if(m_intent == "run")
 					if(!(step_count % 2)) //every other turf makes a sound
 						return 0
-				playsound(T, S, shoes ? 15 : 7, 1, shoes ? 0 : -(world.view/2))
-					//this looks insane but it actually is quite simple
-					//play sound at turf T, using sound S
-					//volume = 15 w/ shoes, volume = 7 w/o shoes
-					//do use vary
-					//add negative world.view/2 if not wearing shoes
+
+				var/range = -(world.view - 2)
+				if(m_intent == "walk")
+					range -= 0.333
+				if(!shoes)
+					range -= 0.333
+
+				//shoes + running
+					//-(7 - 2) = -(5) = -5 | -5 - 0           = -5     | (7 + -5)     = 2     | 2     * 3 = 6     | range(6)     = range(6)
+				//running OR shoes
+					//-(7 - 2) = (-5) = -5 | -5 - 0.333       = -5.333 | (7 + -5.333) = 1.667 | 1.667 * 3 = 5.001 | range(5.001) = range(5)
+				//walking AND no shoes
+					//-(7 - 2) = (-5) = -5 | -5 - (0.333 * 2) = -5.666 | (7 + -5.666) = 1.334 | 1.334 * 3 = 4.002 | range(4.002) = range(4)
+
+				var/volume = 13
+				if(m_intent == "walk")
+					volume -= 4
+				if(!shoes)
+					volume -= 4
+
+				if(istype(shoes, /obj/item/clothing/shoes))
+					var/obj/item/clothing/shoes/shooess = shoes
+					if(shooess.silence_steps)
+						return 0 //silent
+
+				if(!has_organ("l_foot") && !has_organ("r_foot"))
+					return 0 //no feet no footsteps
+
+				if(buckled || lying || throwing)
+					return 0 //people flying, lying down or sitting do not step
+
+				if(!has_gravity(src))
+					if(step_count % 3) //this basically says, every three moves make a noise
+						return 0       //1st - none, 1%3==1, 2nd - none, 2%3==2, 3rd - noise, 3%3==0
+
+				if(species.silent_steps)
+					return 0 //species is silent
+
+				playsound(T, S, volume, 1, range)
 				return 1
 
 	return 0

code/modules/mob/living/carbon/human/species/species.dm

@@ -23,6 +23,7 @@
 	var/unarmed                  //For empty hand harm-intent attack
 	var/unarmed_type = /datum/unarmed_attack
 	var/slowdown = 0              // Passive movement speed malus (or boost, if negative)
+	var/silent_steps = 0          // Stops step noises
 
 	var/breath_type = "oxygen"   // Non-oxygen gas breathed, if any.
 	var/poison_type = "plasma"   // Poisonous air.