MP levelling/xp system

[Avaz 1]

So I'm trying to design a leveling/xp system for an MP game mode, and i'm having issues figuring out how to do a scaling xp requirement for the next level, and also some general questions as i'm sure I could be doing this in a more optimal way.

 

What i'm trying to do is similar to most games, you have a certain amount of experience to reach the next level, and the amount of experience required to level up increases slightly each time you level up, so level 2 = 100xp, level 3 = 150xp, level 5 = 225xp for example. The part I'm not sure with is actually figuring out how to calculate the amount of experience required for the next level, based on your own level. The amount of experience the player receives for different actions such as killing a player will be the same regardless of the level as well. 

 

When creating this system its also worth mentioning that stats will save to a database, or to the players profile, so at the moment I am saving the players total experience, and the players level. This is my first question I guess, I'm currently going with saving the players total experience/level, but i'm wondering if I should instead reset the experience to 0 as the level increases, as I imagine it would be easier that way?

 

So far I have a script which is called to add experience to the player, and I'm currently checking if the player levels up in the same script. This is where my main issue is, as i'm unsure of what sort of calculation I should use to figure out the xp requirement for the next level, based on the players current level. I will also be displaying the experience on something like a progress bar so something like 1200/1500xp. I don't see this being difficult if the players current experience is reset to 0 each time they level up, but if its not reset to 0 and the only var is total experience I can see it being more complicated, which Is why I asked about it in the first place.

 

Any help/feedback would be appreciated, thanks.

 

[donelsarjo 60]

 

 

What i'm trying to do is similar to most games, you have a certain amount of experience to reach the next level, and the amount of experience required to level up increases slightly each time you level up, so level 2 = 100xp, level 3 = 150xp, level 5 = 225xp for example. The part I'm not sure with is actually figuring out how to calculate the amount of experience required for the next level, based on your own level. The amount of experience the player receives for different actions such as killing a player will be the same regardless of the level as well. 

 

use ln(XP) to calculate the level.

 

 

 

When creating this system its also worth mentioning that stats will save to a database, or to the players profile, so at the moment I am saving the players total experience, and the players level. This is my first question I guess, I'm currently going with saving the players total experience/level, but i'm wondering if I should instead reset the experience to 0 as the level increases, as I imagine it would be easier that way?

 

 nope same difficulty if you check the function above.

 

 

 

So far I have a script which is called to add experience to the player, and I'm currently checking if the player levels up in the same script. This is where my main issue is, as i'm unsure of what sort of calculation I should use to figure out the xp requirement for the next level, based on the players current level. I will also be displaying the experience on something like a progress bar so something like 1200/1500xp. I don't see this being difficult if the players current experience is reset to 0 each time they level up, but if its not reset to 0 and the only var is total experience I can see it being more complicated, which Is why I asked about it in the first place.

maybe

 

 

KilledEH:

 

level = floor (ln(xp))

 

if (currlevel != level) then

    currlevel = level

    call fn_fancyeffect

else

   do other stuff

 

if it would be so selfexplainatory we would have a lot more sa matras running around :P

[pedeathtrian 99]

use ln(XP) to calculate the level.

This is cruel, assuming that

The amount of experience the player receives for different actions such as killing a player will be the same regardless of the level as well.

 

Most games use square root curve, that is level = floor(k * sqrt (exp)), where k is some constant.

Given n^th level, required exp_n = (n / k)²

And k is just 1 divided by square root of amount of exp required for 1st level-up: k = sqrt(1 / exp₁)

 

I assumed you start with level 0, which is most like not the case. For starting with level 1 replace n with n-1 where needed:

level = floor(1+   k * sqrt (exp));

exp_n = ((n-1) / k)²

Let's say you start with level 1 and 100 exp points required to gain 2nd level. Then k = 0.1.

Required exp for levels 2,3,4,10:

exp₂ = ((2-1) / 0.1)² = 100;

exp₃ = ((3-1) / 0.1)² = 400;

exp₄ = ((4-1) / 0.1)² = 900;

exp₁₀ = ((10-1) / 0.1)² = 8100;

Assuming player has 450 points of experience, his level will be:

level(450) = floor(1+   0.1 * sqrt (450)) = floor (1+2.121) = 3;

[Avaz 1]

Thanks for the information guys, helps a lot. One thing I would like to ask though pedeathtrian if you wouldn't mind, would you track/save the current xp and lifetime xp separately? As i'm wanting the player to start each level at 0/whatever xp, I imagine it will be easier to keep track of current xp and reset it to 0 each time the player levels up.

[pedeathtrian 99]

Thanks for the information guys, helps a lot. One thing I would like to ask though pedeathtrian if you wouldn't mind, would you track/save the current xp and lifetime xp separately? As i'm wanting the player to start each level at 0/whatever xp, I imagine it will be easier to keep track of current xp and reset it to 0 each time the player levels up.

I'd save only total player exp since all other parameters can be calculated from it. They simply does not contain any new information. So you can store total exp, but show (calculated) progress for only next level-up.

Let's continue example from previous post. Player has 450 points of experience (50 points ahead of level 3). Their level is calculated to be 3. Exp for levels 3 and 4 are 400 and 900 respectively (500 points for level-up). So you show 50/500.

The only value to store is 450.

[kennyleif 20]

Did you get a system functioning?

 

[J0K3R 5 93]

Try this, not my work. Cant remember where I got it from.

 

https://drive.google.com/open?id=0B7f7inkZ9lkaQkNSdFJ0cGZRaWM

[Larrow 2795]

On 9/7/2017 at 7:34 PM, kaysio said:

Try this, not my work. Cant remember where I got it from.

 

https://drive.google.com/open?id=0B7f7inkZ9lkaQkNSdFJ0cGZRaWM

That was mine. Original post can be found HERE.