Get velocity of sprite: no physics, just tween

[joshcamas]

Hey guys!

Right now I have a topdown game where you select a tile and the player will find a path and walk to it, using tween chains.

I have a spritesheet with frames of a character walking up, down, left, right. 

I come from a Flixel background, so I figured I'd be able to check velocity and use that to see which direction I'm going... problem is that looks like a physics thing not a tween thing.

I'll probably just compare last frame's X to the current frame's X... but is there a better way built in?

EDIT: I've tried to check the comparison of the last frame's x and the current frame, but it looks like it stutters to thinking the values are equal when a tween in a chain completes for a frame, and then starts the other tween. (Which is unnoticeable ingame)

Thanks!

[tips4design]

Are you using frameBased tweens?

[joshcamas]

I'm not sure, am I?
 

var tween = game.add.tween(this).to({x:X,y:Y}, time);

 

[tips4design]

No, the default is not to use frameBased tweens, see this: http://phaser.io/docs/2.6.2/Phaser.TweenManager.html#frameBased

So, tweens velocities might vary if your game doesn't run at 60FPS.

Now, considering your game runs at 60FPS, what's the problem if you compute this position minus the position last frame?

[samme]

3 hours ago, joshcamas said:

I'll probably just compare last frame's X to the current frame's X... but is there a better way built in?

You can use `sprite.deltaX()`, `sprite.deltaY()`.