calculate max melee distance

i know how to calculate the max distance for spells

    local range_mult = {
        [2] =  1.70,
        [3] = 1.490909,
        [4] = 1.44,
        [5] = 1.377778,
        [6] = 1.30,
        [7] = 1.20,
        [8] = 1.30,
        [9] = 1.377778,
        [10] = 1.45,
        [11] = 1.490909,
        [12] = 1.70,
        }
    if (spell.target.model_size + spell.range * range_mult[spell.range]) < spell.target.distance then
        if player.target.type == "MONSTER" then
         add_to_chat(123,"Monster out of range of spell")
        elseif player.target.type == "NPC" then
         add_to_chat(123,"NPC out of range of spell")
        else
         add_to_chat(123,"Player out of range of spell")        
        end
        cancel_spell()
        return
    end
 

but how can we calculate the max melee distance for a given mob

I'm not sure, but I suspect it's the same formula with a constant offset. It would require some testing.

i think this is it

player.target.model_size + player.model_size * 1.65

player.target.model_size = 2.7000000476837

player.model_size = 0.40000000596046

for a distance between 5.1 and 5.2 which is ware it is and i cant get mor accurate then that because i can move my char in smaller incriments