attack formula

[Minase]

i think here it should be posted.

i am working on a game,almoust finished,but now i dont know how to do the attack formula.

i do have this variables

$attacker->Strenght
$attacker->Defence
$attacker->Dexterity
$attacker->Charisma

$defender->Strenght
$defender->Defence
$defender->Dexterity
$defender->Charisma

 

dexterity = ability to protect from attacks

 

so how would you suggest to make this formula,cause i have no clue... thanks

[corbin]

Well, you would basically want it based on the attacker's strength, and the defenders defense, yes?

 

So, you would want the damage to grow as the strength grows, but you would also want it to shrink as the defense grows.

 

(I'm ignoring dexterity because I'm lazy, and this is easier to explain with 2 variables.)

 

 

You could do something as simple as:

 

damage = Strength-Defense

 

 

Really it depends on what type of game play you want.  You'll obviously need to find a fair formula.

 

Also, it would depend on how high hit points are in your game.  You obviously don't want to make a formula that takes 1k life if players have like 100 life.

[Andy-H]

if ($killss > 5){

$kills = 5;

}

 

$bulletneed = abs((($drankpos + 4) / ($rankpos + 4)) * ((((30000 - ($kills * 1000)) - ($wep * 1000)) + ($def * 1000))));

 

$new = ($bulls / $bulletneed) * 100;

 

$newhealth = round($health - $new);

 

That was my formula for my old mafia game...

 

$drankpos = defender rank position, $rankpos = attacker rankposition, $bulls = bullets shot

 

Rank positions were 1-22...

 

Weapon/Protection were 0-4

[MasterACE14]

you can also add a random factor. So the damage is never the same every time you attack. its say randomly 80% to 100% of your total potential damage.

[.josh]

Traditionally:

 

Strength = damage

Defense = absorbed damage

Dexterity = speed (how fast you attack, ability to dodge attack)

Charisma = not really associated with battles.  Has to do with for example, getting better deals when buying things

 

These are all modifiers to other things, like what weapon one has, what armor one has, any race/class modifiers if applicable, etc... and traditionally, a dice is rolled to determine certain things like who gets first hit, whether something is dodged or blocked and how much, etc... For instance, just because I have more strength than you doesn't mean I'm going to always hit harder than you on my "turn."

 

If those variables are the only thing you are considering in your game, then you still need to explain how fighting is done in the first place.  Do both people have X health and basically each person takes turns swinging at each other until one of them dies? Does the script automatically do this or is it done in "real time" somehow (using flash, ajax, whatever)? 

 

The reason I ask these things is because we could throw out any battle "formula" but it may or may not work for you, balance-wise.  Do you just want some kind of generic "okay, let's just take turns swinging at each other, first person to 0 loses?"  If $a->strength = 10 and $d->strength = 5, do you always want $a to hit for 10 straight damage, $d for 5? Do you want attacks to be absorbed by exactly what defense defender has? Chance of dodge/parry/evade? Chance of getting extra swing in, due to more dexterity?  Incorporate charisma in it somehow, like...idk, someone loses a turn due to other one being more charismatic?  Chance of critical hits?  Are there any weapons or armor being considered?  Any other game "features" like spells, potions, scrolls, etc..?  Some kind of character level to consider?

 

Figuring out your game mechanics is the hardest part of game design.  It's also the funnest, because you get to make the rules.  But it's hard because you will quickly learn from testing that any little one thing can end up vastly throwing off the balance of everything else.  You need to sit down and picture in your head exactly how you want a "battle" to go.  Write it down on paper.  Put down everything that can happen during this battle and when.  Once you have that down, the coding part will be easy. 

 

[paschim]

Well, assuming yours to be a generic turnbased fight system, I Would say:

 

damage= Strength-((defence+dexterity/random(1))/random(5)+2);

 

[.josh]

Look at that formula.

 

let's assume:

strength = 5

defence = 5

dexterity = 5

 

5-((5+5/[0,1])/[0,1,2,3,4,5]+2)

 

possible outcomes:

5-((10/0)/2) = error (can't divide by 0)

5-((10/0)/3) = error (can't divide by 0)

5-((10/0)/4) = error (can't divide by 0)

5-((10/0)/5) = error (can't divide by 0)

5-((10/0)/6) = error (can't divide by 0)

5-((10/0)/7) = error (can't divide by 0)

5-((10/1)/2) = 0

5-((10/1)/3) = 1.66666666667

5-((10/1)/4) = 2.5

5-((10/1)/5) = 3

5-((10/1)/6) = 3.33333333333

5-((10/1)/7) = 3.57142857143

 

Your formula won't work half the time, because it will throw out an error.  Even if you fix that (like doing rand(1,2) instead), you have to decide whether you want someone to be doing 0-3.5 damage with those levels or not.  That may or may not work for your game.

 

Traditionally, defense is not part of a damage equation to begin with, unless you are wanting to consider damage reduction, due to the opponent's defense.  Traditionally, dexterity isn't party of a damage equation, unless you are wanting to consider the opponent being able to dodge or parry the attack.  Something like this would be more "accurate" traditionally:

 

// find out whether attack will be dodged or not.  If it's dodged, no need to calculate damage
$dodge = rand(1, 20) + $defender->dexterity;
// success is traditionally based on rolling 1d20 with 15+ roll
// if successful...
if ($dodge > 15) {
   // damage is nothing
   $attacker->damage = 0;
// if not successful dodge...
} else {
   // example. You would use this to scale
   $defense = rand(1, $defender->defense);
   // damage is traditionally calculated by rolling 1d20 and adding modifiers (like strength)
   // you could in addition include something like player's level by doing rand($level, 20) but you
   // would have to scale 20 to always be at least equal to level
   $damage = rand(1,20); // if you scale $defense, you might have to scale this
   // add the base damage to strength modifier and subtract how much damage was 'absorbed'
   $attacker->damage = ($damage + $attacker->strength) - $defense;
   // make sure attacker doesn't end up doing negative damage
   if ($attacker->damage < 0) {
      $attacker->damage = 0;
   }
} 
// subtract damage done from defender's health
$defender->health -= $attack->damage;

 

But even that may or may not work for your specific game.  Point of my example over paschim's is that you need to use the vars logically, as in, what are those variables representing in your game mechanics.  You need to base your formula on what makes sense "physically" in your game reality.

[Minase]

sorry for my long reply,but i had some projects to do

let me explain and thank you all for your replys.

i never designed an attack formula (complex like this) so thats why im asking for help

 

dexterity is the ability to dodge the enemy

here is how i would like the dodge formula

when attacker turn

$defender->Dexterity - $attacker->Dexterity = 10 //lets say

he has 10 % chance to dodge that hit

 

charisma is a chance to make a 2 hit

if attacker turn

$attacker->Charisma - $defender->Charisma = 5 // just example

5 % chance to do a 2 hit

 

damage is influenced by level diference

if ($attacker->Level < $defender->Level) {

$dmg_minus = $level_difference * 9;

// the $dmg_minus represent how much procent we decrease from damage

// if diference is 10 then 10*9 = 90.If attacker damage was 100 - 90% = just 10 dmg.

 

the battles should have random factor based on charisma and dexterity too.

even if attacker has strenght and defence higher than oponent,openent can still give higher hits.

 

if ones health <= 0 battle stop.

 

thank you very much again

if you have more questions you can ask

[xoligy]

Charisma seems like a stupid one to me should either be speed, hp or intelligence

 

Speed is still as charisma but makes more sense imo

hp is health points

Intelligence could be an added bonus to do a crit hit

 

i would say have a look at a game called duels.com but i know its changed alot since i played it back in jan (was enjoyable back then)

[Andy-H]

Generally when comparing stats you haveto work out a division formula so that you dont end up with a negative number and adding hp or set a maximum and check if the attacker / defender level is higher, if not they get nothing, if it is a little less/extra damage...