[Help] Regenerate "Health"

[ETTETT]

How I can create a Regeneration? It's kinda same as Travian's resources regaining.
I want in example a 10/100 HP to start regenerating itself like 11/100, 12/100, 13/100 in some time without requiring that the player is online. Something other methods than something that relates to time() function?

Of course it must be non-exploitable.

Thanks.

 

[EliteGM]

Why not just check how much time has passed since the last visit as soon as they revisit?

2

 

[Caustik]

You could calculate how long they've been playing for during one session, and then multiply that by a small integer to get another number which then is added onto their current health. So basically, the longer they play, the more health they gain.

Another way is to calculate based on certain attributes (resistance to x (i.e poison)) could be a good one.

 

[Xavi.]

Yeah, if they aren't necessarily online, there's no need to do it gradually? On their next session it would appear gradual if you add it to their previous health.

You could use a unix timestamp (just a suggestion). Getting the difference between the times of their sessions (log off then next log on) then as Caustik said, multiplying it by the amount of health you want them to regain per second (or whatever) then adding it to their previous health upon their next session start

 

[Quitta]

what about creating a cron job that updates all players health and run that every 10 seconds?
Tbh i have no idea if this is a good implementation, maybe someone else can reply on this?

 

[EliteGM]

I don't see how this is too elaborate? Just have checks on every page that compare the current time() to one that was last put in your database and put a new one in.

2

 

[Quitta]

but doesnt the way you specify, only update the players health, incase the player executes that code/loads the page.
Regenerating shouldnt be executed.

 

[EliteGM]

If the player is going to be offline, there is no need to, for example, have an hourly cron job going, as they won't see the progress until they log back in anyway

2

 

[Quitta]

thought about the multiplayer concept? What if someone else plans to attack the player in a pvp battle while the player is offline?
If the player quits its session with 30 hp, the system should behave like if he was online on this matter imo.

 

[Xavi.]

How can a player be attacked if they are offline?

And if the player is offline, as said, there is no need to regenerate gradually as the user wouldn't see the gradual change but just a jump to a new hp level on their next login.

Example: I end my session with 34hp at 1:35, (assuming the regeneration is 1hp every 20 seconds) if I log back in 8 minutes later at 1:43, my HP would be 58hp, but I wouldn't have seen all the 1hp steps to get there (34hp... 35hp... 36hp...) So there would be no need to do It gradual, unless the regeneration is done whilst the user is online.

 

[Quitta]

How I can create a Regeneration? It's kinda same as Travian's resources regaining.

In travian, players can be attacked while being offline, if I remember well, same for other browser games.

 

[Xavi.]

Wouldn't that mean that you'd have to be online 24/7 to prevent yourself from always being killed?

But yeah, if its that case, you could use a chron job, or looper, etc. depending on what language you're in

 

[jMerliN]

Don't do it until the last possible second. That's how.

If something regenerates health CONSTANTLY, you calculate the effective health it has each time you need to use it, you don't use some cron job to update it every 5 minutes or something. Then whenever it's changed (after it's hit, etc), you update it in the database with the new value and when it was updated, and from there you can calculate the current HP at any time. You can even get your SQL query to return the current HP by using a little math in the query.

So if currentHp is 100 and max is 1000, and rate of gain is say 50/min, you store lastUpdated at some timestamp X. In the future, you get currentHp, then multiply rate of gain * (Y - X)/60 where Y = current timestamp.

 

[s-p-n]

I would put the equation in a getter method for the player.health field. It wouldn't matter which player is accessing that data, it would be loosely coupled with anything using it, and it could easily be used in such a way the player can see their health-rate increase in real-time.
This information is intended to be used in conjunction with jMerliN's answer.