Chaosforge Forum

DoomRL => Discussion => Topic started by: Zi on July 30, 2009, 18:35

Title: How exactly does accuracy work?
Post by: Zi on July 30, 2009, 18:35

Even though I have a rough idea about the impact of accuracy in the game*, how exactly is the number used to determine whether a shot hits or not?

Also, when things are not spotted, is the accuracy number simply halved before use?





* (+1 = about half your shots miss, +4 = most of your shots hit, +8 = almost every one of your shots hit)

Title: Re: How exactly does accuracy work?
Post by: Thomas on July 31, 2009, 10:20

Basic Info:
The game rolls some dice and adds your accuracy (Also taking in to account distance, further away targets are harder to hit). You're right with your vague numbers, having +0 accuracy means exactly 50% of your shots will hit (Assuming average luck, of course)

If you can't see the enemy, the game also makes a coinflip. Tails you automatically miss, heads you proceed as normal. This is done before any other accuracy rolls.

Spoilery Info:

Spoiler (click to show/hide)

The game rolls a 3d6, I'm pretty sure.
Every value on the 3d6 corresponds with another value. Rolling a 9 returns -2, 10 is -1, 11 is 0, 12 is +1...
However, the extreme lows and highs don't follow this pattern. 3 is -30, 4 is -20, 5 is -10. 16 is +10, 17 is +20, 18 is +30.
You add your accuracy to the value you get, and if it isn't negative, you hit.
Even ludicrously inaccurate guns will hit if you roll a 16+, which is a 1 in 36 chance.
Likewise, the most accurate guns will still miss occaisionally, which is why the @ screen never shows an accuracy better than 98%.

Title: Re: How exactly does accuracy work?
Post by: Zi on August 02, 2009, 17:54

Thanks for that post, it really gave me insight.  I didn't really use the @ screen before - it does have its benefits!

How does accuracy degrade with range?  Among other things, I'm trying to decide if it's worthwhile to take the third level of eagle eye with chainguns.

Title: Re: How exactly does accuracy work?
Post by: Blade on August 02, 2009, 18:00

Quote from: Zi on August 02, 2009, 17:54

I'm trying to decide if it's worthwhile to take the third level of eagle eye with chainguns.

It's not.

Title: Re: How exactly does accuracy work?
Post by: Thomas on August 03, 2009, 02:48

Quote from: Zi on August 02, 2009, 17:54

How does accuracy degrade with range?  Among other things, I'm trying to decide if it's worthwhile to take the third level of eagle eye with chainguns.

If you're sniping people (Edge of sight radius) you'll lose about 3 accuracy iirc.

Quote from: Blade on August 02, 2009, 18:00

Quote from: Zi on August 02, 2009, 17:54

I'm trying to decide if it's worthwhile to take the third level of eagle eye with anything

It's not.

Title: Re: How exactly does accuracy work?
Post by: Zi on August 03, 2009, 23:50

I took both of your words to heart as I played recently, but more and more I'm beginning to think the third level could be worth it.

With 2 levels of eagle eye, I still notice that a third of my shots or so miss when firing at range.  If the third level could reduce that to, say, a fifth of my shots missing, it'd be well worth it, more than equivalent to a level of trigger happy but with less ammo use.

And if it's true that about 3 accuracy is lost when firing at range, I believe that would mesh closely with what I'm seeing (~ +2 final accuracy ), and another +2 I think would make a big difference.