Damage Formula

[Bettonio]

Is possibile to know how damage calculation works?
Not the reduction fatctors against armors but the formula of damage.
thx.

 

[xenoargh]

Simply put, yes.  Damage / armor factor - armor flat protection value + very minor randomness = damage.  The armor factors  are listed in module.ini; you can't add new categories.  But...

...you can control it, and totally ignore how the engine calculates it, if you want to.  See Fancy Damage System, both what I released OSP and what will be in the next Blood and Steel source (I have made some fairly major improvements, but haven't had time to release it).

 

[cmpxchg8b]

Something along the lines of

if hold_time >= 1.1
	hold_bonus = 1.2
elif hold_time >= 0.6:
	hold_bonus = (1.1 - hold_time) * 0.6 + 1.2
elif hold_time >= 0.5:
	hold_bonus = 1.5
else:
	hold_bonus = hold_time + 1.0

raw_damage = weapon_damage * (clamp(hold_bonus, 1.0, 2.0) * 0.5 + 0.5)

if weapon_type == 'one_handed' or weapon_type == 'two_handed' or weapon_type == 'polearm':
	raw_damage *= math.pow(melee_damage_speed_power, speed_bonus)
elif weapon_type == 'crossbow' or weapon_type == 'bow' or weapon_type == 'throwing':
	raw_damage *= math.pow(missile_damage_speed_power, speed_bonus)

if weapon_type == 'crossbow':
	if raining:
		raw_damage *= 0.75
else:
	raw_damage *= proficiency * 0.01 * 0.15 + 0.85
	
	if weapon_type == 'bow':
		raw_damage *= min(power_draw, difficulty + 4) * 0.14 + 1
		
		if mounted:
			raw_damage *= horse_archery * 0.019 + 0.8
		
		if raining:
			raw_damage *= 0.9
	elif weapon_type == 'throwing':
		raw_damage *= power_throw * 0.1 + 1.0
		
		if mounted:
			raw_damage *= horse_archery * 0.019 + 0.8
	elif weapon_type == 'one_handed' or weapon_type == 'two_handed' or weapon_type == 'polearm':
		raw_damage *= power_strike * 0.08 + 1.0

	raw_damage += strength / 5.0

	if (weapon_type == 'two_handed' or weapon_type == 'polearm') and (has_shield or mounted):
		raw_damage *= 0.85
		
		if weapon_type == 'polearm':
			raw_damage *= 0.85
		
		if weapon_flags & itp_two_handed:
			raw_damage *= 0.9

raw_damage = clamp(raw_damage, 0, 500)

 

[xenoargh]

Huh.  No random fuzz at all?  It's just variations in how the engine handles the speed bonus?  Interesting.

 

[cmpxchg8b]

Armor soak has random fuzz.

 

[xenoargh]

Ah.  OK, so basically, by different means.  Armor soak fuzz formula, plz?  I would like to understand that completely, if you've got that math, it might help with something in Fancy Damage System 2.0.

 

[cmpxchg8b]

armor = appropriate_armor_value_for_hit_location

if hit_shield_on_back:
	armor += shield_resistance + 10

soak_factor = armor * module.ini_soak_factor_for_damage_type
reduction_factor = armor * module.ini_reduction_factor_for_damage_type

if item_flags & itp_extra_penetration:
	soak_factor *= module.ini_extra_penetration_soak_factor
	reduction_factor *= module.ini_extra_penetration_reduction_factor

randomized_soak = (random.random() * 0.55 + 0.45) * soak_factor
randomized_damage = (random.random() * 0.1 + 0.9) * raw_damage
soaked_damage = randomized_damage - randomized_soak

if (soaked_damage < 0.0):
	soaked_damage = 0.0

randomized_reduction = math.exp((random.random() * 0.55 + 0.45) * reduction_factor * 0.014)
reduced_damage = (1.0 - 1.0 / randomized_reduction) * soaked_damage

if (reduction_factor < 0.00001):
	reduced_damage  = 0.0

damage_difference = round(reduced_damage + randomized_soak)
effective_damage = randomized_damage - damage_difference

if hit_bone == head:
	effective_damage *= 1.2

	if item_is_ranged:
		effective_damage *= 1.75
elif hit_bone == calf or hit_bone == thigh:
	effective_damage *= 0.9

effective_damage = clamp(effective_damage, 0.0, 500.0)

 

[xenoargh]

Thank you very much.  That at least tells me where the ranges fall, I'll have to walk through that and chart it out, I guess.  Trying to deal with certain types of random damage (primarily, my implementation of explosives and AOE weapons) in a way that's a bit cleaner.

 

[MadocComadrin]

How many people would like me to try my hand at an app that turns all of this pseudocode into a set of nice charts?

 

[Somebody]

Well, at least we now know what itp_extra_penetration does (nothing to do with hitting more than one enemy, oh well).

elif weapon_type == 'crossbow' or weapon_type == 'bow' or weapon_type == 'throwing':
raw_damage *= math.pow(melee_damage_speed_power, speed_bonus)

 

[cmpxchg8b]

Obviously.

 

[xenoargh]

How many people would like me to try my hand at an app that turns all of this pseudocode into a set of nice charts?

I'd dig just a simple javascript calculator on a page somewhere, myself, to run numbers through.  However, it's something that can go out-of-date very easily, so it's probably a waste of time.  I just wanted to see the math to understand some of the calcs I'm doing (basically, the bug-fix Taleworlds did in 1.134 makes a newer, more-accurate Fancy Damage System possible).

 

[Bettonio]

Really thx