Question on how to do a simple formula

[Titanhex]

Alright I've been wracking my brain trying to figure out a proper formula to ease my coding problems. It's just general math, so I figured it could be put in this thread for analysis.

The game gets a random integer from 1 to 12.

When this spell is level 1, I want it to have a 50/50 chance of doing one effect or the other.

At level 2, it should split into 1/3 chance of doing 1 effect of two others. So a 100% chance of doing something, but only one of 3 things.

Finally at level 3, it should have a 1 in 4 chance, following the same principles as previous.

I figured 12 goes into 1 2 3 4 and 6, so it'd be the appropriate number to use.

The first part is set up great.

i < 12/1+lvl and i >= 0

At level one it's if the number is 6 or less, at level 2 if it's 4 or less, and level 2 if it's 3 or less.

6/6 = 12
4/4/4 = 12
3/3/3/3 = 12

Just like I want, but I can't figure out the equations for the rest. I can only calculate for the first part of it.

 

[overload119]

integer chance = (GetAbilityLevel()+1)/2
integer effect = GetRandomInt(0, chance)

I'm still a little confused on what you want to be honest.

The unit has ability. The level of the ability + 1 is the number of effect that he can cast. You want an integer to return one of the effects?

 

[Titanhex]

I'll try your method, it seems like it should work.

Update: Your formula needed some adjustments. I didn't need to divide by 2 because at level 2 it would be a 2/3 chance, which is weird.

Instead I just made it a 0,GetUnitAbilityLevel() chance. if it lands on 0 it's lesser rune, 1 it's a mimic, 2 it's a regular rune and 3 it's a strong rune. I've modified the code to show the changes

Still incase, to clarify:

Well what I want is a formula so I don't have to make an if statement with sub-ifstatements for every level.

Instead I was hoping to acquire a formula that would allow me to do this.

If the player casts the spell at level 1, there's a 50% chance to create a rune or 50% chance to create a hostile mimic.

At level 2 there's a 1 in 3 chance to create a rune, 1 in 3 chance to create a stronger rune, or a 1 in 3 chance to create a mimic. So there's a 100% chance you're gonna create something.

At level 3 there's a 1 in 4 chance to create a rune, 1 in 4 chance to create a stronger rune, 1 in 4 chance to create the strongest rune, or a 1 in 4 chance to create a hostile mimic. So 100% chance to create something, and a 1 in 4 chance per item.

I'm stating this because I could do it like 40% chance to create X and 30% chance to create Y, but both items can be created in one instance of the spell.
Or I could do it like 40% for X, 30% for Y, and 30% to have nothing created, but you can't create X and Y in one instance of the spell.

I'm trying to achieve the latter, where only one thing can be created in a single instance of the spell.

Anyways, I've succeeded so here is my workaround

Success

function Transmute_Actions takes nothing returns nothing
 local unit c = GetTriggerUnit()
 
 local real X = GetSpellTargetX()
 local real Y = GetSpellTargetY()
 
 local integer lvl = (GetUnitAbilityLevel(c, 'tran')
 local integer i = GetRandomInt(0,lvl)
 
    if i = 0 then  //At level 1 i < 6, i < 4, i < 2
        call RemoveItem(GetSpellTargetItem())
        call CreateItem('A009', X, Y)
    elseif i = 1 then
        call RemoveItem(GetSpellTargetItem())
        call CreateUnit(Player(13), 'mimi', X, Y, 270)
        call UnitApplyTimedLife(c,'B000',20*lvl)
    elseif i = 2 then
        call RemoveItem(GetSpellTargetItem())
        call CreateItem('A009', X, Y)
    elseif i = 3 then
        call RemoveItem(GetSpellTargetItem())
        call CreateItem('A009', X, Y)
    endif
endfunction

 

[Maker]

EDIT: Oh, you figured it out?

Trigger

• Set Item_Array[1] = Claws of Attack +15
• Set Item_Array[2] = Crown of Kings +5
• Set Item_Array[3] = Kelen's Dagger of Escape
• Set Item_Array[4] = Mask of Death

• Untitled Trigger 001
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Holy Light
  • Actions
    • Set Temp_Integer_1 = (Level of (Ability being cast) for (Triggering unit))
    • Set Temp_Integer_2 = (Random integer number between 1 and (Temp_Integer_1 + 1))
    • Item - Create Item_Array[Temp_Integer_2] at (Random point in Region 000 <gen>)

At ability lvl 1 it randomizes between 1 and 2.
At ability lvl 2 it randomizes between 1, 2 and 3.
At ability lvl 3 it randomizes between 1, 2,3 and 4.