How do you stop a tween?

I want to end my tween process when my character body exits an area2d.

  • xyz replied to this.

  • NJL64
    Do exactly as @DaveTheCoder said.
    In _on_laser_body_entered(), instead:

    var tween = create_tween()

    do:

    tween = create_tween()

      NJL64 Call Tween::kill() on the tween object. You'll need to keep a reference to it in a non-local variable so you can access it from the signal handler.

          xyz How do I create a reference it in a non-local variable. When I try to put "var tween = create_tween()" above the functions, I get "Enemy.gd @ @implicit_new(): Can't create Tween when not inside scene tree."

            Declare the variable at the top of the script:
            var tween: Tween

            In _on_laser_body_entered:
            tween = create_tween()

              DaveTheCoder Thanks. I think I've almost got it, but now when the body exits the area2D, I get the error: "cannot call method 'kill' on a null value."

              • xyz replied to this.

                  • xyz

                  • Post #6
                  • Edited
                  • Best Answerset by NJL64

                  NJL64
                  Do exactly as @DaveTheCoder said.
                  In _on_laser_body_entered(), instead:

                  var tween = create_tween()

                  do:

                  tween = create_tween()

                      xyz Thanks so much. How come getting rid of "var" made it work?

                      • xyz replied to this.

                          DaveTheCoder thank you so much. Just so I understand how it works, how come getting rid of "var" did the trick?

                            NJL64 How come getting rid of "var" made it work?

                            When you use var you declare a new variable. If you declare a variable inside a function then that variable is local to function. If, at the same time, the script-wide variable with the same name exists (declared outside of the function), the local variable will take precedence and shadow the script-wide variable inside that function. The consequence in your case is - tween you used inside the function is not tween you declared at the top of the script. So the latter stays uninitialized i.e. null.

                            https://gdscript.com/tutorials/variables/ (scroll down to "Variable Scope" section)

                                Think of the var declaration as defining where the variable lives. A file is a neighborhood, and the functions are houses. If the variable lives in a house, it can only be seen inside that house. If it lives outside of the house, then it can be seen from anywhere in the neighborhood.