CenterX and CenterY

[Onyx]

Yo guys
How to understand that centerx and centery?
I mean perfect set up without writing random poses and testing every minute.

[T.O.R.N.A.D.O]

centerx and centery determine where the shadow should appear for the character and balls.. Usually for the character, centerx is the length from starting frame to the middle of legs and centery is the height of the frame.. For balls, centerx and centery are the co-ordinates of the middle point of the ball..

[YinYin]

It also highly depends on your sprite quality.
If your sprite sheet is neatly aligned you can use the same center values on all frames.
Once single sprites start to derivate from the center (see Deeps DvA for example) you will need to adjust the center values accordingly.

I would suggest trying to align/correct sprite positions on the sheet first if possible.

[Bamboori]

there is azriels visual frame maker and nowadays several data changing programs (dont recall which tho) which give you a live preview of your frame