Hello, welcome to today's tutorial. And our topic for today is angular projection. I believe most of you would have heard of it and have also studied about it. But for quick refresher, I think it's really important to know what are the two angles of projection that we will be using in order to understand better the orthographic views and also to make it better for us an interpretation of the drawings, right, so let's go for it. So this would be your first angle and third angle projection, which I believe you would have already seen. So the front view, there is a plane and the front view and this is the left side view and is the top view.

Okay, likewise for the top angle, okay, so let's see what is the difference between the first angle and third angle especially with the front view on the top view placement, okay. So I have before me a model, okay, which I created here. And this Model I'm just going to show you how it's going to look on the two reviews projected. Okay, so firstly, let's, uh, let's assume the observer is here, okay? And the observer is observing the object, okay? So when he observes the object, what happens?

So, this, this particular view gets, let's project it onto this play around. And when you project this particular view onto this plane, let's make this rotate and show to you. Do you see that? So this could be again, so this would be basically your front view, right? And these are basically like four quadrants which are shown here. So this is the first quarter and second quarter and third quarter and fourth quarter and so any projection angle shown and the first one would be first angle projection.

The second one would be the second angle projection, and third one would be the third angle. projection photo will be the fourth angle projection, but we do not use the second and the fourth, we use only the first and the third. The first angle projection is used in most of the countries, except for the US. And since most of our customers are from the US, so we would most of our companies, or you would see that they will be using the third angle projection. And even in my for the courses, like when I'm taking the drawings and all of that most of them would be from the angular projection. All right.

So let's see this particular solid model. And the solid model. You see here. It's in 3d. So what I'm going to do is I'm just going to show you what happens here. So let's assume the observers here, okay?

And the observer views it from the side of the screen to here, okay. So when you you would from that side, this assume you're standing there, okay. So this is what you would see. Okay, so this Particular club. So I can just say these are the other features. So to build a static reference to the better code, okay, so this is the front view again.

So this would be your code. And let's say the observer wants the top view of it. So what happens to the doctor? So the observer, let's say he's viewing the object from here, okay? So I'm just going to rotate this. I'm just going to place it.

So you see this, this would be the top view. And if you notice, I've actually rotated the plane this way, okay? Which means, so let's assume this particular plane is rotated by a 90 degree, okay? So just give me one minute. Whatever This is all on the top view when it's rotated down, right? So the top one would become the front view, and the bottom one would become a top view.

Okay? So basically, so when you view it, right, so when you view this thing, so when you view it like this, it would be the front view on the top and the top view on the bottom. Okay, so that's what I'm trying to say. And let's say the same thing I'm going to try with this particular one, the third and reprojection up here. So basically, I have the same model in the third quarter. Let's assume the observer is standing here, or whichever side you want.

You will, it's your left your observation, okay? So I'm just gonna assume that the observers here, okay? And the observer when he views it from here, okay. What happens when he views it from you? So whatever you use it, it just comes on the front view. So the same the same phrase But if you notice, where is it coming?

I mean first of all this plane like this the vertical plane and this is the horizontal plane, right? So this particular model is falling on the vertical plane, but below the datum plane, okay, so below this plane. So what happens to talk to you now? So now let's assume the observer is standing here to view the top view. Okay, so what I'm going to do is I'm just going to try to move this around, and let me select the objects. And let me just rotate this.

And if you notice here, okay, let me just hide this. Now. If you notice, this is the top view. So what happens to the front view, the front view would be playing Here like I showed you previously, and the top view comes on top around. So, what you understand by this, so, when an observer views a particular object in the first angle projection, so the object is always between the observer and the plane, the projection plane, the observer and the object is in the middle, okay. And what happens in this particular thing is the when the observer is here or he stands here, and when he views this particular object, so, there is a projection plane in between.

So, when there is a projection plane in between the object and the observer, okay, so that is the only difference, and that's a major difference, okay. And the representation of this would be done by showing this particular symbol you would notice this on all of the drawing sheets and even before you start To drawing, it's very important that you select the angles of projection. Now you you understand, I believe this is the front view and this is the top view comes down, and how the top use here in the front view comes down. Okay? And the same goes with since it's the first time projection, it will be the opposite. So the left side view would come on the right, and the right side view would come on the left.

Okay, I can show this as well here. So let's assume this particular phase again. So if this is going to be my 3d model, and if the observer is standing up to the right of this model, okay, so this is going to be the right to the model, right? And he's going to view what is he going to view standing on the right is going to view the left this particular thing, right. So when you project the assume there is a plane here, okay? So when you projected This is what you're going to see.

Okay? So and this the To the left of the front view, so this is assumed plane as to the left of the front view again. And so basically the right side view comes to the left again, and I'm doing it this way, then the left side view comes to the right. Okay, the same goes with third angle projection as well. Okay, so it's just like you're unfolding a box. And we just placed it as it is, and you would get that view.

And now let's come to the this is the projection symbol which you need to remember which is very important. The first angle and the third angle, okay? When I project this on to the, when I'm viewing from the left side, I get my left side view on the right side, okay? And the same. So constraint is the front view. And when I view this object from the left side, I will get a left sided Okay, so I get it on the left side.

So I believe Giving you better clarity about the first time that Orlando projection, okay? And this is a very important concept to understand all the drawings, especially, it helps a lot in interpretation of the 2d drawings, okay? Because when you watch a 2d drawing, you need to know you need to be able to imagine how it looks in 3d. And they will just give you the front view top view, right side view, left side view. That's it, okay. So this is very important thing.

I hope you have understood this. Because without this, you would not be able to do any of the orthographic views or 3d modeling. Okay, that's it for today. Thank you