Evade

Evade is a character's chance to dodge a melee or ranged attack. It is derived from DV, Perception and Evasion.

Technical Information

The following pseudocode describes the Evade roll in detail.  It is based on stock Elona; Elona+ seems to have tweaked the equations somewhat.

The Evade roll has three possible results: !hit: normal hit. !nohit: miss. !crit: critical hit.

dim accp  //accuracy
dim evap  //dodge
if defender.dimmed
    if rand(4) < 1
        !crit
        end
if defender.sleep
    !hit
    end
if defender.blind
    evap = evap/2
if attacker.blind
    accp = accp/2
if attacker.confused or attacker.dimmed
    if attacker.isranged
        accp = accp/5
    else if attacker.ismelee
        accp = accp*2/3
if accp < defender.greaterEvasion *10
    if evap/accp > 3
        if rnd(defender.greaterEvasion +250) > 1
            !nohit
            end
    if evap/accp > 2
        if rnd(defender.greaterEvasion +250) > 150
            !nohit
            end   
    if evap/accp > 1.5
        if rnd(defender.greaterEvasion +250) > 200
            !nohit
            end   
if rnd(5000) < attacker.Perception +50
    !crit
    end
if attacker.critChance < rnd(200) //max critChance is 30, which requires ~840 Eye of Mind
    !crit
    end
if 1 >= rnd(20)
    !nohit
    end
if 1 >= rnd(20)
    !hit
    end
if accp < 1
    !nohit
    end
if evap < 1
    !hit
    end
if rnd(accp) > rnd(evap *3/2)
    !hit
    end
!nohit
end

The following is the algorithm in plain text: The game considers any status effects first and makes a few calculations.

• If the defender is Dimmed, there is a 1/4 chance to crit, regardless of all other stats.
• If the defender is Asleep, the attacker will always hit, regardless of all other stats.
• If the attacker is Blind, their accuracy is halved.
• If the attacker is Confused or Dimmed, ranged attacks will have 1/5 their normal accuracy, and melee attacks will have 2/3 their normal accuracy.

Once those calculations are out of the way, the game determines the outcome of an attack in the following order:

1. If the attacker's accuracy is less than the defender's Greater Evasion skill level multiplied by 10, then there is a chance to miss depending on the gap between the attacker's accuracy and the defender's evade.
2. The attacker is given a chance to land a critical hit based on their Perception attribute.
3. The attacker is given a chance to land a critical hit based on their Crit Chance, up to a maximum of 30% chance.
4. The attacker has a 1 in 20 chance to miss.
5. The attacker has a 1 in 20 chance to hit.
6. The attacker will miss if their accuracy is less than 1%.
7. The defender will be hit if their evade is less than 1%.
8. Finally, the attacker has a chance to hit based on their accuracy versus the defender's Evasion skill level multiplied by 1.5. Otherwise, the attack misses.