Battle Formula editing

[Acera]

I've been trying (note: trying) to edit the battle formula's to suit my likings. And there's something I'm stuck with;

here's the line which I've been messing around with;

self.damage = atk + (attacker.str / 4)

to say thing simple, I'd like to have an extra variable added in there, a random number which can be -2, -1, 0, 1 or 2 (lets call that variable dmgmod for the sake of explanation)

so the code should become

self.damage = atk + (attacker.str / 4) + dmgmod

seems simple enough right? Well I can't figure out how to make a random number go from -2 to 2. rand(3) goes from 0 to 2 (right? O.o) I tried some things which work on my calculator (which uses RandInt(-2,2) which could output any number from -2 to 2. But ruby doesn't like my calculator it seems..

EDIT: I've also been messing around with the "critical strike damage modifier" it used to be

self.damage *= 2

but that didn't really fit in with my damage so I changed it to

self.damage *= 1.5

Now the problem is that I'm getting crits which are like 7.65 damage, how can I make sure that it's rounded off to either 8 (when it's 7.5 or above) or to 7 (when it's 7.49 or below)

If anyone could illuminate me, that would be appreciated  :smile:
~Acera

 

[Clockwise]

Hey
for the dmgmod problem try making
dmgmod = rand(3) - rand(3) 

for the critical you can try this
self.damage *= 3
self.damage /= 2
though there's probably other ways

hope it helps / works =)

 

[Crystalgate]

Clockwise solutions should work. For the first problem though, the game will have a bias towards picking numbers close to zero if you use Clockwise solution. If you don't want that bias, try following: self.damage = atk + (attacker.str / 4) + rand(5) - 2

 

[Acera]

self.damage = atk + (attacker.str / 4) + rand(5) - 2

for the critical you can try this
self.damage *= 3
self.damage /= 2

sorry, didn't have enough time to test it enough. Just did some testing and it seems to work out perfect.

Both thanks a lot =)
~Acera