Okay, so in this section we're going to learn two more features that will help us to create any part in 3d. So as with the extrude and revolve command, we are again going to go in on a two dimensional plane, draw sketch and project into three dimensions. So we're going to first of all learn the sweep command. Let's go to sketch, create sketch, click on one of the planes. Let's draw a circle and go back into 3d mode we have this two dimensional circle. Now this time, let's go sketch again create sketch.

I'm going to go on to this plane here. And let's create an arc a three point arc. Place the start point, place the end point and place a middle point go back into 3d dimensions. If I hide my origin here, you can see that what we have is a two dimensional circle. Starting at the center of that two dimensional circle, I have an arc. And now what I can do is I can take the circle and sweep it along this arc.

I got to create sweep, select the profile, click on path and select the path and I hit OK. So the sweep command is very common to create pipes. It's actually the way in which screws or a lot of different fasteners are made and many other things. I can also cut sweep. Let's go ahead and do that. Let's click on this face, go to sketch, create sketch.

I'm now drawing on that face. We got to sketch let's draw a polygon this time. Let's just draw it right at the center stop sketch. Now I should be able to take this polygon that we just drew, and use the same arc to cut sweep. So I go to create sweep, I click on the polygon in terms of the path, I want to click on the same path that we use before and okay. And we've just cut out a polygon shape all the way along this tube here.

Let's go ahead and delete this. Now we're going to learn the loft command. We're going to go to sketch create sketch. Let's draw a rectangle here. Let's go ahead and create an offset plane. We can offset it from the shape that we just created.

Now on this plane let's click on it sketch, create sketch. Let's draw a circle and go back. What we have so far is we have a two dimensional circle on a plane. And I also have a two dimensional rectangle off of the coordinate plane. And so this time we can go to create loft and I want to loft between this profile and This profile, and hit OK. And you can see that with this last command, what we do is in a smooth way, we can join two different shapes. So I've joined circular shape to a rectangular shape.

And you can imagine that this could be pretty difficult to do with just the extrude command that we originally learned. I can do the same thing along with the other three features that we learned that I can also cut loft. So as a review, again, we've learned about the extrude command and the revolve command. And then we recently learned sweep and cut sweep where we can sweep a two dimensional sketch along a line and we can do that to add material or remove material. And the same with a loft command we can loft between two 2d sketches. This is primarily used when you're going between two different shapes.

We can do it to add material or remove material. You have just Learned parametric modeling. This is the basis for most CAD programs, this is the basis to be able to create almost any part in three dimensions. Almost all CAD programs function in this exact same way you use these four features to create three dimensional parts. Believe it or not just these four features, it doesn't seem as if you could create any part in 3d, but take confidence you truly can. So you're going to learn to break down objects in your mind to model them using these four features and you're just going to get better with time.

You really have the fundamentals to draw any part in three dimensions. Don't be intimidated by these CAD programs. They have a lot of different features. You're really truly not going to be using most of the features of the program. You've learned the fundamentals, be confident in that you have the knowledge you need with this to be able to create truly Just about any part in 3d. Let's move on in the next section and we're going to start putting different parts together to create an assembly.