Stacking Question for the Devs (Math Stuff)

AntiJelly
AntiJelly Member Posts: 1,155
edited May 2019 in General Discussions

So, how do perks and add-ons stack?

For example, you're using "Brutal Strength" and "Shadow Dance - Blood" on Wraith, and you're kicking a Generator.

Kicking a generator requires 2 charges, and default kicking is 1 charge per second.

"Brutal Strength" adds +0.20 charges, and "SD-B" adds somewhere around +0.50 charges.

How would the equation look? Like this?

2.0 / (1.0 + 0.20 + 0.50) = ~1.18


Or like this?

2.0 / ((1.0 + 0.20) * (1.0 + 0.50)) = ~0.98


And again for something like "Fire Up", is the equation constantly changing itself or adding on to itself with each generator done?

Like, for breaking a pallet with two gens done:

2.6 / (1+0.08) = ~2.41


Or:

2.6 / ((1+0.04) * (1+0.04)) = ~2.40


I'm asking because I want to have a more thorough understanding of the math, and was wondering if it really matters the order of add-ons or perks in their respective slots.

Like if there's a difference between putting "Shadow Dance - Blood" in the leftmost add-on slot, and "Shadow Dance - White" in the rightmost slot, or vice versa. Or if there's a difference between putting Brutal Strength in the leftmost or rightmost perk slot.

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Comments

  • Peanits
    Peanits Dev Posts: 7,555

    The first one. When your speed/rate is increased, the effects are added together (with a base of 1 CPS) and the time is divided by the total. Positive effects are additive while negative effects are multiplicative.

  • AntiJelly
    AntiJelly Member Posts: 1,155

    @Peanits Okay. I...thought so. Just making sure.

    So, do two of the same add-ons stack additively? I've always heard they're multiplicative, and it matters what order you put them in.

  • Peanits
    Peanits Dev Posts: 7,555
    https://forum.deadbydaylight.com/en/discussion/comment/488533#Comment_488533

    It depends on the add-on. If it's doing something positive (e.g. increasing cooldown recovery) it will be added together and then calculated. If it's negative (e.g. reducing healing speed) it will be multiplied together.

    For example:

    Say you have add-ons and perks that increase pallet break speed. I'm pulling these numbers out of nowhere, these aren't actual numbers for all I know.

    2.6 / (1 + 0.2 + 0.5 + 0.25) ~= 1.33s


    Or if you are reducing the speed of healing speed, for instance (using coulrophobia and sloppy butcher in this example):

    16 / (1 * (1 - 0.5) * (1 - 0.2)) = 40


    McLean explained it a bit here: https://forum.deadbydaylight.com/en/discussion/comment/178984/#Comment_178984