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‫Hello and welcome.

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‫In this lecture, we're going to be setting up remap able inputs so that when we press down or either

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‫on the mouse key or on a controller, we get a press and release message coming through from Blueprint.

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‫Let's dive in and see how to do this now.

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‫We don't want to be doing this trace all the time.

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‫We only need to be doing it when we're getting ready to grab an object and we don't want to automatically

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‫grab it when we go near it.

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‫So to actually grab onto something, we need to use a mouse input, some sort of input.

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‫Now previously we've done this with events in Blueprint and we're going to do it again with events.

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‫We will see how to do this in C++ soon, but we are going to first do it with events.

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‫And what I want to do is set it up so that it could work with the keyboard, it could work with the

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‫mouse, or it could work with a controller.

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‫So to do this, we need input mapping, something that you see quite often in games.

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‫And the way we're going to do this is go to our settings COG, we're going to go to the project settings,

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‫scroll down to the engine and then input.

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‫Here is where we set up things called action mappings and axis mappings.

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‫So what these two concepts are are essentially the mappings between your controller analog sticks or

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‫buttons, or perhaps your mouse and your mouse buttons or your keyboard.

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‫The actions are discrete things.

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‫These are things that you press a button and it just happens as a press, as a release.

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‫And the axis mappings are things which are more continuous, such as when you move a mouse slightly

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‫or you slightly tilt a controller, there's a degree to which you can tilt it.

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‫You can tilt it, not at all.

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‫You can tell to all the way or anywhere in between.

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‫Those are axes.

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‫We're not going to deal with axes in this section because all we're dealing with is an action where

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‫we are trying to activate our grabber component.

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‫So the way we're going to do this is to unfold our action mapping.

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‫So you can see there's already a couple of action mappings here.

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‫There's a jump and then there's a primary action.

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‫This has been set up for us because we're using the first person template and there is a primary action

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‫already here.

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‫Now let's unfold that primary action and you will see that there are two ways to trigger the primary

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‫action.

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‫You can use the left mouse button or the gamepad right trigger.

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‫Now, because I want to give you an idea of how we can set up our own action mapping.

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‫I'm actually going to hit the delete button next to the primary action and we're going to create our

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‫own.

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‫So the first thing to do is click the add button next to action mapping.

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‫Then we need to give this action a name.

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‫In my case, I'm going to call this grab and then we need to select a mapping.

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‫Now you can either do this from the dropdown where you can select any of the mappings in here, or you

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‫can click on that little keyboard button which allows you to capture whatever you're doing.

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‫So you click on it, it goes yellow and then you click again or you use whatever key.

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‫If I hit space, you can see it puts in space bar.

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‫If I actually click with my left mouse button, you can see it adds a left mouse button option here.

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‫So a little mini challenge for you now is to go ahead and set up this action mapping, add the left

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‫mouse button.

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‫Maybe if you've got a controller, add in a controller button here to.

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‫Okay.

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‫Welcome back.

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‫So I'm going to add in a new action mapping is this add button.

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‫And then what we can do is we can I don't have my controller hooked up at the moment.

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‫So what you can do is click the dropdown and we can go to gamepad and you can look for the gamepad right

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‫trigger, for example, and that will set it up so that when you pull the trigger on your gamepad,

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‫it's going to activate our grab action.

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‫So we've set up the action mapping.

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‫Now we need to actually make use of it.

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‫So we're going to go over to our content draw.

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‫We're going to look for our beep player and open it up because the beep player is the one that has the

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‫grabber component.

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‫And that's what we're eventually going to want to activate and make it grab something.

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‫And the way we can do this is by right clicking in the Blueprint Event graph and searching for grab.

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‫So now there is an input action events grab event and this is linked up to whatever keys you have set

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‫up and you can change that and you can potentially create screens in the game which allow your players

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‫to change the input mappings as well.

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‫And what you got here is two events, a press event and a released event.

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‫So I'd like to challenge you to log on that particular action.

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‫So add a blueprint log for when it's pressed, add it for when it's released, and check that your mappings

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‫work.

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‫So go into the game.

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‫Use the particular keys that you've mapped to grab action and see if your log messages get printed out.

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‫Pause the video and have a go.

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‫Hey, welcome back.

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‫So for pressed, we are going to do a print string, which is not going to say hello.

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‫It's going to say grabbed and then we're going to have a released one as well.

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‫Again, a print string which is going to say released like.

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‫So now let's go ahead into our dungeon level and hit play.

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‫And now if we hit the mouse button, it says grabbed.

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‫When I release it, it says released.

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‫And you can see that that is working as we would expect.

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‫Great stuff.

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‫Now we've seen how we can set up action mappings that are remap able and map able to multiple inputs.

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‫I'll see you in the next lecture.