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Thread: Attack Speed Working Principle

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    Default Attack Speed Working Principle

    Working Principle of Attack Spped

    Some useful definitions:
    BAT: Base Attack Time
    IAS: Increased Attack Speed
    BAS: Base Attack Speed
    DPS: Damage per Second

    1 point of Agility gives +1% Increased Attack Speed, or IAS.
    100% IAS = 1 IAS

    ( 1 + IAS ) / BAT = attacks per second

    BAT of my hero:

    BAT is 1.7 for all heroes except:
    Vengeful Spirit: 1.77
    Soul Keeper: 1.5
    Soul Keeper (Metamorphosis): 1.6
    Troll Warlord (Berserker Rage): 1.55
    Lone Druid (True Form): 1.6
    Anti-Mage: 1.45
    Lycanthrope (Shapeshift): 1.4
    Alchemist (Chemical Rage Level 1): 1.45
    Alchemist (Chemical Rage Level 2): 1.35
    Alchemist (Chemical Rage Level 3): 1.25

    How does IAS stack?

    Increased attack speed stacks additively, not in compound amounts. Each point of Agility gives +1% IAS. So a hero with 40 agility (+40% IAS), a hyperstone (+55% IAS), and power treads (+30% IAS) has a total of 125% IAS.

    What are the upper and lower limits to attack speed?

    The upper limit is 500%, while the lower limit is 20%.

    Technically, heroes can actually have negative attack speed; it ranges from -80% to 400% IAS. The range of 20% to 500% is due to the additional 100% that is added to IAS in the formula.

    How exactly do I work out the attack speed of my hero?

    A hero's total IAS is calculated by adding the hero's Agility to the sum of IAS given by any IAS items. Remember, 1 point of Agility adds 1% IAS. So, a Troll Warlord at level 1 (with 21 agility) equiped with a Hyperstone would have:
    21% (Agility) + 55% (Hyperstone) = 76% IAS = 0.76 IAS

    Jah'rakal has a BAT of 1.7 and thus, a BAS of:
    1/1.7 = .5882352941 hits/second.

    Therefore, Jah'rakal's current attack speed is:
    (1 + 0.76)/1.7 == 1.035 hits/sec

    And his current DPS is (assuming the Troll Warlord has an average of 50 damage):
    50*1.035= 51.75 DPS

    DPS is the number that really matters, and is what this calculation is for.
    Click here to find out how a noob plays the Anti Mage

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    Thanks. Really beneficial thread. + Rep.

    Steene / Lightstrike - Level 80 Rogue/Paladin - Bloodcraft Blizzclone US
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    hmm...eto boro list?porte eccha korlo na.ki hobe eto dota jene?tourney to shadowplay e jitbe...
    How many roads must a man walk down, before u call him a man?

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    Quote Originally Posted by Roby View Post
    hmm...eto boro list?porte eccha korlo na.ki hobe eto dota jene?tourney to shadowplay e jitbe...
    ek bar na parle dekho soto bar


    B+ i mean b positive

    Like a wolf in sheep's clothing
    I try to hide my deepest sins,
    Of all the things that I've done wrong
    And I know where I belong.



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    How does SP winning the next tourney has anythng to do with this thread?
    Click here to find out how a noob plays the Anti Mage

    Honesty and Modesty were the best policy...they still are.
    A single stupid man can ask more questions than a thousand wise men can answer
    <nfs>.......for life..

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    Quote Originally Posted by Sin Eater View Post
    How does SP winning the next tourney has anythng to do with this thread?
    Roby, please explain your rap.

    Steene / Lightstrike - Level 80 Rogue/Paladin - Bloodcraft Blizzclone US
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    needed to to know bout alchemist thanks bro

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