How do I push a character away from a part? (Repost, self-answered) [closed]

Let's assume that we have a BasePart named "Part", which is the part that will push Players' characters away.

We'll need to connect a function to BasePart.Touched, an RBXScriptSignal that fires whenever a BasePart touches the BasePart, with the other BasePart passed as the only argument.

When part is touched, let's first check if other_part belongs to a character or not with Players:GetPlayerFromCharacter. If not, we'll return from the function. If so, we'll continue and keep the character for later.

Then, we'll check if the character has a Humanoid or not with Instance:FindFirstChild. If not, we'll return from the function. If so, we'll continue and keep the Humanoid for later.

Now that we've done the necessary gets and checks, we can push the character away from part. First, we'll sit the Humanoid with Humanoid.Sit = true, otherwise the character won't always be pushed. After that, we'll instantiate CFrame at part.Position facing towards other_part.Position. Think of the CFrame as an arrow pointing away from part and towards other_part. This arrow is the direction that we want the character to be pushed, away from part. To get the Vector3 that describes the direction this arrow is pointing, we can use CFrame.LookVector. Now that we have the desired direction, we'll instantiate BodyForce and assign its BodyForce.Force to the direction multiplied by a multiplier (let's go with 5000). Finally, let's assign its parent to other_part.

This works fine, except body_force stays there permanently. Let's Instance:Destroy it after 0.5 seconds.

Finally, we should only have one BodyForce per character. Let's create a dictionary with character as keys and true or nil as values (describing whether or not the character has a BodyForce). We'll check and update this appropriately.

I hope this helped!