- [Instructor] In this AutoCAD tip and trick,
we're going to look at making the transition
into 3D design using commands like Region,
Presspull and Extrude.
Now at the moment, we're in a new drawing,
which is 220 3D Design-3Dsolids.dwg.
You can see the name of it there in the title bar
at the top of the AutoCAD screen.
You can download the drawing from the library
to follow along with this particular tips and tricks video.
And I suggest that you do as well,
because it's a really good one to follow along,
so that you can understand the workflow
between 2D and 3D in AutoCAD.
Now, when you open up the drawing,
you should be in the Model Space.
And you can see there we're in the Model tab,
bottom left there, like so.
And we're also in the top view on the ViewCube.
These are actually 2D elements in the drawing anyway.
So there wouldn't be much to look at in 3D at the moment,
but we will move into 3D in a minute,
and you'll see the changes we can make.
Now also, as well,
we have an ISO A3 landscape layout tab you'll notice.
So that says 3D Solids there,
and we've got a view port there showing what's going on
in the Model Space as well.
So let's jump back to the Model tab, now like so.
And you'll notice in our Layers panel here,
in the Home tab on the ribbon,
we've got objects, text, title block, et cetera.
Just stick with the objects layer
as your current drafting layer at the moment.
That will be absolutely fine.
In fact, what we might do there, let's change the color.
Let's give it a nice blue color, like so, and click on OK.
And you'll notice your objects change color
in the Model Space.
It's always nice to have a color when you move into 3D
'cause it gives it a bit more substance
when you start generating 3D solids.
Now, what we're going to think about is, like I said,
Regions, Presspull, and Extrude.
We're going to look at how they work in 3D.
Now to do that, we need to be working in a 3D environment.
So the first thing we need to do is change our workspace.
So we're going to come down to Workspace Switching here.
And you can see currently, we're in Drafting and Annotation.
Select 3D Modeling as your workspace.
You'll see your ribbon change
to all the 3D commands available in full AutoCAD.
That's really useful because some of these commands
that we're going to use, such as Extrude
and Presspull are on the ribbon,
you don't have to keep typing them, for example.
Now, what we're also going to look at is this one here.
If I hover over this object, you can see it's a region.
It's basically a plate with holes in but it's flat, it's 2D.
So how do we start working in 3D.
We've gone into the 3D Modeling workspace,
and we're in the top view at the moment.
So let's change our view here on the ViewCube
by clicking on the bottom left corner there.
That will put us into an Isometric View.
Now it may be
that your crosshairs now look a bit weird as well.
Can you see they're a little bit
sort of dark there, like so?
Sometimes what I do is change my background color as well.
So let's do a right click and go to Options.
And in the Display tab in Options, go to Colors.
And all you want to do
is change the 2D model space uniform background.
So we'll change that to white, like so.
Apply and close, and okay.
And you can now see clearly what is going on
with everything you see across hairs.
It's up to you what colors you change with your display.
I've just made that white
because it just makes life a little bit easier.
Now let's have a little look.
We've got a region here like so.
Now a region is basically an object
that has been created from multiple shapes.
And what I've done is I've created the outer polyline
with the filleted corners,
and subtracted from that shape these four circles.
So it's a bit like a gasket
that you might place in a car engine.
It's a flat 2D shape with holes in it.
Now the lovely thing is,
is I can extrude that straight away.
So I'm in 3D, I go over here to Modeling in the Home tab,
and I click on Extrude, like so.
It will tell me to select the object to extrude.
So I select my region, click like so,
and enter to confirm that region.
Now as I come up, can you see the holes extrude as well?
So let's take that up to a sensible value
by moving the crosshair upwards.
Let's say 150 and enter to confirm.
Now I'm in 2D Wireframe as a visual style.
If I click there and change that to Realistic,
can you see now I've now got a 3D solid with holes in it?
If I do a little bit of an orbit
by holding down the Shift key
and holding down the mouse wheel,
and just bring that around a little bit,
I can actually see through that solid.
So a region is one way of extruding a 2D object
and taking it to become a 3D solid.
Now here's another really cool way
of doing it though as well.
I'm going to go back to the 2D Wireframe visual style
over here, like so.
And as you can see,
our 3D solid now looks like a wireframe model.
Now over here, we've got a polyline
and we've got four circles.
Now this is where I can utilize
things like Extrude and Presspull.
It's a clever command, Presspull, as well,
because you can press or pull solids
out of an existing 3D solid.
So what I'm going to do is I'm going to extrude again
in the same way that I did with the region here, like so.
So I'm going to go to Extrude, like so,
and select the outer polyline this time.
Press enter to confirm the selection.
And can you see it's doing the same thing as the region,
but the holes aren't going with it,
because they're just circles?
It's just a polyline with filleted corners and circles.
This time is not a region.
So as I go upwards, like so, I'll type in 150 again.
Make sure you type it correctly, unlike me,
like so, 150 there.
And you can see it looks the same,
but I haven't got the holes.
So what will happen now is if I go here to Realistic again,
as a visual style, I haven't got the holes,
they're not there.
If I go to something like X-ray, you can see that
obviously, there's no holes there at the moment.
So what I want to do now is go back
to my 2D Wireframe visual style.
And what I want to do now is utilize the Presspull command.
You might want to zoom in a bit closer for this as well.
It's a little bit easier if you're a bit closer.
So I'm going to utilize Presspull here now
on the Modeling panel, in the Home tab,
in my 3D Modeling workspace.
So I'll click on Presspull.
And it says select object or bounding area.
Now use the pick box here.
So I'm going to select this circle.
Make sure you get the circle, hover over the circle,
like so, because you only want the circle.
Now the trick there is how do I do this?
How can I just get that circle and nothing else?
Well, I click on it like that
and I just drag upwards like that.
So make sure you go past the top of the extruded polyline
and click, like so, and then press enter to confirm.
Now, you might think that that has created a hole.
Let's have a look and see what's happened.
Let's go back to Realistic, like so.
It hasn't.
What you've got now is two separate 3D solids,
one inside of the other.
So how do we fix that?
How do we make that work?
Well, let's just go back to our wireframe, 2D Wireframe,
and let's get rid of this.
We'll delete that, like so.
And what it does is it leaves the circle there like that.
Because what it's done is it's done a Presspull through
and created a solid from that.
So what we want to do is we want to move our four circles
to the top face of the solid and press through
if we can go the other way.
So let's select the four circles, one, and two,
and three, and four.
And we want to move them.
So let's be sensible here, we right click and select Move.
We've still got the Move command
on the right click shortcut menu.
So I'm going to specify a base point
of the midpoint of that one there, and then come up
to the midpoint of that one there.
So they're now on the top face of the solid.
So what I should be able to do now is Presspull those
through the solid this time.
Let's see what happens.
So I've got those and I've got 2D circles there.
Let's see whether this works.
So if I go to Presspull and I hover over that circle there
and click and drag it through.
So there it is there.
Select object or bounded area.
So I'm going to click, like so,
and take it down and through like that,
and enter to confirm.
Now, because that was on the top face
of the solid this time,
rather than coming up and through the solid.
If I now go to Realistic,
you'll see now that I've generated a hole.
Can you see the circles are now on the top face as well?
And then not being deleted.
You can change variables in AutoCAD to delete the 2D object
that you've used to create a 3D element.
But if I now hold down Shift
and hold down the mouse wheel and orbit,
you can see I've made a hole with the Presspull this time.
So let's just make sure
that we're back in the Isometric View.
And what I'll do now is I'll do a Presspull
on each of these.
Just hover inside the circle,
click and drag it through.
Make sure you can see it.
There's a hole there.
Do the same again here, click and drag it through.
There's a hole there.
And hover there inside the circle, click and drag it through
and there's a hole there.
And to finish, and then when I go to the top view,
you'll see that they've now both got holes in them
and they are the same 3D solid.
You see that's the 3D solid?
That's a 3D solid.
You do have some circles going on there.
So you can see there if I click there
with selection cycling, there are some circles there.
You can delete those if you wish.
Let's jump back to that Southwest Isometric
by clicking on the corner of the ViewCube.
You have now generated two 3D solids
that are exactly the same using very different methods.
The right hand one was using the region
that we had created in the drawing,
and the left hand one, we use the polyline
with the filleted corners and the circles
to utilize Presspull to push press the holes
through the 3D solid that we created from the polyline.