Turn-Based RPG Turn Order when you use Haste

I have a RPG game that generates a list of about 10 turns that you can see. The turn list is based on the characters speed value and based on clock ticks - it adds the speed until each reaches 1000 and whoever reaches 1000 first goes next (actTimer += speed).

My problem is that since I have a pre-calculated turn list, how do I properly implement a haste (or slow) spell. This will obviously increase the rate of your turn (maybe actTimer += (speed * 1.5f)).

But I already have the pre-calculated turn list up to 10 so this would only be effected either after the 10 entries in the queue already...which doesn't make sense. I also tried resetting the turn list from scratch but that doesn't work as the player who could be next can be waaay down the line if their speed was low.

I also thought I could generate the list but keep cycling through as if a player took his turn. But then this wouldn't be accurate as what if I'm on turn 300 but on turn 10, someone used Haste or slow? I would have to know this when I am simulating the turns in the background to calculate accurately.

So how would you implement a character using a Haste spell when you have a predefined turn-list that you display on the screen?

 

Why can't it be recalculated when they use the ability?

 

I tried that and let's take the scenario where the player with the lowest speed is up next. If I recalculate, that player would again, be at the end of the line...which isn't fair because he/she was next.

 

You can solve this with a pretty basic queue system to ignore that specific condition.

 

The solution is to get rid of precalculated turn list and rebuild the queue periodically.

 

I found a way to recalculate the list and maintaining the right order. I now store a previousACT variable for all the players. This stores the last ACT value before it gets reset to 0 (their turn order). So now when someone does a modifier (Haste, Slow, etc), it will set all of the ACT's the the previousACT value and then restart the calculation.

A simple solution and it works perfectly.