WEBVTT

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Hi and welcome back to the Unity 3-D third

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person camera tutorial series. In the last video we

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set up a new behavior where the camera has the

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character orbit around it which was pretty different and the

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character actually rotates as we run around the camera.

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We talked about translating the coordinates from the control stick.

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Let me zoom out a second. We

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talked about translating the control state coordinates, which you

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can see in blue in this image into world space,

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which is the green vector and then taking the

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cross product, which is the red line here in

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the play view. Using that to determine the direction

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that the character needs to turn. That's that was

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the last lesson. So in this lesson we're going

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to see how we can polish the script up because

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it's kind of got a problem. If we decided

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to run towards the wall and we run into it

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we can kind of see around the world. It

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just looks sort of strange and it's not exactly what

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we want, because you can get into this weird

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situation where we're looking around walls instead, what we

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want to do is sort of have the camera push

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up against the wall when we run into it,

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so we're going to implement that in this lesson.

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Mhm. Okay, let's get started, let's go

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into our script file, we're only going to need

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to edit one file for this, and that's going

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to be the third person camera file. So we

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want to do is you want to go and uh

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before this lesson, I actually remove that offset variable

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that we used to have, and now I just

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calculate uh the character offset just using using code,

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which is quite a bit better. Um So we

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want to do now is you want to make this

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new method called compensate for walls. And what this

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is going to do is going to move the camera

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back to collide with the wall. We're going to

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use a Raycast to do that. So we

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got this method compensate for walls. We've got a from

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and a to. We're going to draw a line

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from the object to the target and you'll be able

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to see that in science. So let's have a

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look at that real fast. And let's add a

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call to this in our method right before smooth position.

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So let's see what this does. Okay,

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As you can see in the b right here,

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we have in our scene view a sigh in vector.

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Now going from the camera to the character.

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Uh, and that's the target where we're trying to

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aim at, which is 1.5 m up from the

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top of the character. So if we run into

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a wall now, if you turn around and you

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can see that vector is colliding with the wall.

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And if you're looking at the code, there's a

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ray cast right here where we're doing great cast from

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the object to the target and stored in this wall.

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Hit objects. So we just create a new

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recast hit object called wall hit. And we can

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draw a ray. And they were doing this red

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ray here, which you can see in this view

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museum in on it, you can see this red

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ray where we hit the wall. So I'm just

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drawing using vector dot left. Just a red vector

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where it hits the wall. So you can see

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we've got a correct value by taking this this direction

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from this line right here where we go from the

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from the target. I'm sorry, from the object

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to the target, we hit the wall, we

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draw back to where we hit, and now let's

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move the camera to the X and Z coordinates while

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maintaining the Y value of the camera. So we're

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passing the camera's target in by reference and what this

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means. We can actually change this value and we

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don't have to actually store into a new value up

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here. So if the wall hit happens, we

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just move it, I we just moved the target

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to the wall, point X and Z and the

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Y value of the target. So we don't actually

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change the Y value. And that's why the cameras

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still here, as you can see, it's at

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the X and Z values of this point, but

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it maintained its wipe out. So that's helpful there,

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and that's basically how it works. So that's

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that's all there is to that, it's not quite

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as robust as the one in uh and the Zelda

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camera, just because you can get into situations like

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this where you can actually see outside of the world

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still, but it's definitely a step above what we

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had before. So that's it for this lesson and

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uh, tune in next time.