you have it, it's not a rule it's a function of the expression editor. in basic code, you'll need an attribute called distance on each character. constrain that attribute to a magnitude of the x value of the actor - x value of the character, y value of the actor - y value of the character.
that will give each character the distance from the actor. then you'll have to come up with code to figure out which one is the shortest and then decide what you want to happen.
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that will give each character the distance from the actor. then you'll have to come up with code to figure out which one is the shortest and then decide what you want to happen.
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