Sprites animation.

My sprite class carries a "frame delay" timer and an update method that increments the timer, checks to see if it's gone over the "frame delay" and advances the frame if so.

This way I can have a variable maximum "frame delay" (150ms for my running animation and 300ms for my jumping animation). Then I just loop over the objects that should be animating and increment their internal animation timers with the game's delta timer.

Sorry, can you explain it a little bit better, because i really didn't understand.

Each object 'sprite' will have a variable 'float fDelay' to tell it how long before changing to the next animation picture. This delay can be different for each object 'sprite'

So I have a sprite of the player walking, this will have a delay of 150ms, so every 150 ms the sprite draws another frame in the animation

Then I have a sprite of a glowing sword (this needs to animate faster) so we have a delay of 100 ms, so every 100 ms it animates another frame.

Every time the program goes once through the game loop, it tells the objects 'sprites' how long it has been since last time through the loop. The objects 'sprites' keep count of how long since they last changed animation frames, and if its been longer than their delay vairable states, then they cange animation frames, and they reset their counter and wait again.

lfc = how long its been since last animation frame was changed
dc = delay counter, telling how long we dealy until we cange frames
tmr = how long since last time we ran through the game loop

// start game loop
trm = current time - last time
//loop through sprites
lfc = lfc + tmr
if (lfc > dc) change animation frame, and clear lfc to 0
// draw sprites
//end sprite loop
//end game loop

Hope that helps :)