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Okay.

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In this lecture, we're going to quickly set up a collision group for players in our game to avoid player

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collisions.

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Now we should be well versed with collision groups at this point.

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So this will be a piece of cake to implement in our project.

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We can go ahead and head to our model tab and open up collision groups and create a new collision group

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in here.

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I'm just going to call it players, and we'll make sure to have players not collide with other players.

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Now that we have our new collision group, we can head to Server Script service and add a new module,

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script or service.

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And I'm just going to call this our collision Group service.

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We'll use that same template we've been using before.

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I'll rename this to collision Group service.

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And inside of here we're going to need the player service.

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And we should be good to go.

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So what we're going to need is a function to listen for when a character is added to the game.

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We'll pass a character to this function.

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We're also going to want to listen for when a descendant is added to our player's character.

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So we'll call it on, descendant added.

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And then we'll also want to listen to when a descendant is removed from our player's character.

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That way we remove the collision group off of that particular instance.

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So on descendant removed and we'll pass a descendant to this function as well as to this function.

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And then we'll also create a function to listen for.

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When a player is added to the game, we'll pass a player to this function.

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And then with this player we'll listen to their character added event, and we'll connect the on character

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added function to that event.

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And then for the initialize function, all we're going to need to do is loop through every single player

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that is inside of our game.

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So in players get players.

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And we'll call our on player added and pass that player to the function.

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And then we're also going to connect to the players dot player, added event and connect on player added.

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So when a character is added to a specific player, what we want to do is loop through every single

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descendant inside of that character.

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So in character, get descendants.

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What we want to do is we'll use our en descendant added function.

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So we'll call en descendant added and pass that particular descendant.

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And then for this character, we want to go ahead and connect to the descendant added event as well

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as the descendant removing event.

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So we'll connect en descendant added and then we'll connect to the descendant removing event.

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On the Senate removed.

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And then all we're going to do in this function is we're going to make sure that this descendant is

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a base part.

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So is a base part.

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If it is not a bass part, then we're just going to return.

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Otherwise we can set this descendant collision group property equal to our players collision group.

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And then we're going to copy this here and do the same thing for descendant removing.

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But this time we want to set the collision group back to the default collision group.

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And just like that we're done with setting up collision groups for our game.

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So let's go ahead and start up a two player server and see if it works.

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All right here.

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I've got my two players and let's see if I can collide with each other.

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So if I go and walk.

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Actually looks like we're still colliding for some reason.

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That's a problem.

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So let's go ahead and see what we did wrong in our code.

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And in fact, we did get an error.

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And our error is down here because I accidentally made a little typo.

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I put a capital L there instead of a lowercase l, so that's why it didn't work.

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So make sure your get players call does not have a capital L in it.

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And now we should be able to test with the two player server.

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Okay let's go ahead and try that one more time.

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If I go and touch my player, as you can see we no longer have collisions with our players.

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Very easy to implement.

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Now our project should be complete, so I'll go ahead and see you in the next lecture.