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‫Hello and welcome.

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‫In this lecture, we're going to be architecting our gun such that when we hit the mouse button or the

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‫trigger, then we are going to get a log message.

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‫And this log message is the first step in getting many other things running off the back of this gun

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‫architecture.

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‫Let's dive in and see how it's done.

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‫So we want this gun ultimately to be able to shoot and that is the core of it.

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‫Why are we choosing to have the gun as the core of our shooting architecture?

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‫Well, as I've already alluded to a little bit, we want to be able to support different types of methods

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‫of shooting.

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‫Now, what are the kinds of methods of shooting that we can typically have?

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‫There is direct fire, which often uses ray tracing and direct line of sight to ascertain whether or

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‫not a victim has been hit.

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‫So it would go and say, okay, I can see that enemy.

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‫It's that line of sight from the gun to the enemy is clear.

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‫It hits him, so we have to do him damage.

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‫Otherwise, if I missed and I didn't hit the enemy, it doesn't do damage.

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‫That's one very easy way.

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‫It doesn't really replicate the physics of a bullet, but there's no need to.

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‫So for performance reasons we don't now with a rocket launcher or something like that, it's often a

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‫very slow projectile.

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‫We want to see the effect of that projectile moving through the air and the time delay can be important,

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‫in which case we might spawn that projectile and see whether the projectile hits in 5 seconds time,

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‫or we might go down a different route with bullet drop and rifles and sniper rifles over long distances.

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‫So all of this could change depending on the implementation of our gun.

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‫Now we're going to implement one gun during this section.

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‫It's going to be a rifle, a direct shooting type of gun.

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‫But in order to leave that architecture open for you to extend, we are going to make the gun responsible

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‫for doing shooting.

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‫So that means we have to go ahead and introduce some shooting architecture into our gun.

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‫So we've got a gun.

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‫H We want to create a public function to this that is going to allow us to essentially pull the trigger

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‫on the gun from the shooter character or from wherever we're binding input.

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‫In the case of the enemy, for example, we're going to be pulling that trigger from the eye.

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‫So let's go ahead and create a void.

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‫It doesn't have to have a return type pull trigger method and it doesn't need to take anything.

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‫All we need to know is that we want to pull the trigger in this frame.

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‫So having that is sufficient now I'm going to go ahead and create the implementation with control shift

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‫P and create implementation.

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‫And then in here, all I'm going to do is I'm going to put a YUI log and I'm just going to make it warning

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‫to stand out and change the message to You've been shot like that and that's great.

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‫So that's what we're going to call in our character DHCP.

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‫So this is going to be a challenge to you.

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‫It is some more input binding.

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‫We've done lots of input binding here.

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‫You've got lots of examples of input binding.

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‫Go ahead and do this.

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‫To hook up a shoot action, you're going to have to create a new action in the project settings for

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‫shooting.

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‫Bind that to your key, your right trigger, whatever you want to bind it to, then bind it in the character

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‫set up player input component method to do this.

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‫And then after binding the character, you should be able to call the pull trigger from within the function

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‫that you have created on the character.

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‫Remember to put a function in to character in order to set up the binding, rather than trying to bind

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‫directly to that gun.

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‫Binding directly to the gun isn't going to work.

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‫You need to put a little function intermediary in there.

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‫So pause the video and I'll give you a little bit of a hint or a little bit of a start if you're struggling

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‫with that last part of the challenge of creating the intermediary function.

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‫So here comes the hint if you don't want the hint, pause now.

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‫But the hint is going to be we're going to do something like this, which is to have a new private function

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‫called void, shoot and create the implementation over in C++.

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‫And it's going to be in here that we call to the gun's own method.

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‫So the gun's pull trigger, we're going to do gun.

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‫And then call pull trigger on that from within shoot.

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‫And this is what you need to bind.

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‫Okay, so pause video again, if that's where you want to take things and then let's go and set up the

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‫actions.

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‫Okay.

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‫So we're going to go over to our project settings.

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‫So settings, project settings and we want to dock this and go to our input and we want to add a new

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‫action and we're going to call it shoot.

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‫And then we're going to bind this to the left mouse button and the right trigger, not the right trigger

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‫axis.

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‫The right.

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‫Just trigger.

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‫I thought that's what I'd selected, but I had not.

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‫Okay, so we're binding to both controller and mouse and then we're going to go over and bind the axis

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‫in our shooter character.

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‫CP So copy this bind axis for jump.

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‫I mean action.

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‫Of course, I'm always going to get those two mixed up.

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‫We all call switch over to the shoot axis here.

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‫The pressed is what we want and instead of binding to jump, we're going to bind to a character shoot

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‫instead.

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‫Like so and let's go ahead and build.

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‫It looks like that has succeeded.

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‫Let's close that on down and see if it works.

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‫So let's exit the game and hit play again and have a look at our output log.

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‫Crucially, it play.

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‫Yeah.

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‫So if I hit the mouse button, it is working.

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‫Let's see if the same thing happens if I use my right trigger.

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‫Yep.

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‫Right trigger is working too for firing.

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‫So obviously a log message is not the best way of letting your player know that something is going on

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‫in the game.

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‫So in the next lecture, we're going to look at adding in particle effects to do just that.

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‫I'll see you there.