[solved]may someone can do it?

[mfc]

Remenber that a object doesn't move on he Z-axis on its own (the player has to push on the up or down button).

How do you think woody's balls going up an down on z axis?

Or davis and dennis' balls? Are they moving on z axis just with player inputs?

Like I said before; hit-j tags on t3 objects moves it up and down on z axis.

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I think you can solve your problem with DC

OR

with sprites.

Thoses missiles aren't one ball but three balls (but one ball data file).
You can treat it in 3 lines.

Each line has its own sprites' sequence.
And when one of the missiles of a line hits something, all the line explode.

It is not a exceptable solution. Because it lowers the reality and looks bad when chasing.