- [Instructor] I'm going to talk about circles and corners now.
You'll see Circle, Corner on the toolbar
laying next to one another.
So I'll select on the Circle icon.
Once again, we have a pull-down
with all the various methods of creating a circle.
I'm going to cover a few of these.
So the first one is Center and radius.
So first we select our Center point and a Support,
in this case I'm going to pick this surface.
You can pick a plane as well.
Now by default what the system does after I pick a surface
is that it takes a plane tangent
to the surface at that point,
so right the circle is not necessarily touching the surface,
but if I want the circle to touch a surface
I can say Geometry on support
and it lays it down on the surface,
but I'll just take that back off again.
Now you can see I have a Radius value.
I can make this bigger or smaller.
I also have a partial circle, as you can see.
You can swing this around.
Or I can say I want a complete circle
and there we have it.
If I turn on Axis Computation
what it'll do is it'll actually generate
the axis of that circle through that center point.
Let me just double-click on that,
let me shrink the Radius a little bit,
and I'm going to go ahead and say Geometry on support again.
Lay that guy down.
I'm going to go back into Circle.
Next is Center and point.
So with this one you're not specifying a Radius
and this is a fairly consistent theme within CATIA.
So in this case I don't have the ability
to specify a Radius value,
but I have the ability to specify
the center point and the radius point,
meaning the circle is going to go through the center point
and it's going to go through that point.
As soon as I select the Surface as a Support
you can see the radius is defined.
If I say Geometry on support in this case
you'll notice it lays the circle down
and because the circle is so large
it falls off of the actual surface.
If you want to bring that back you can bring that back.
And again, you can do partial as well.
Go back into Circle.
You have Two points and radius.
With this you specify Point 1, specify Point 2,
specify your Support,
and here you can see I have various options.
Now Next solution walks me through those first two options,
complete circles through those two points.
If I come up to Circle Limitations
and I select on Trimmed Circle
you'll notice here I have two options
on this side of the Trimmed Circle.
I can switch the side as well.
I also have the capability of adjusting the Radius.
As long as the Radius is big enough to bridge the gap
between those two points you'll always get something.
If the Radius is too small for example,
let me go ahead and restart that
and I'm just going to enter in a Radius of 2,
and I'm going to go between Two points.
Two points and a radius, bring that back down to 2.
If I pick the two points, pick my Support,
get a message.
Comes up and says oh, I can't do that.
And the reason is because those points are further away
than two millimeters apart.
So if I go up to let's say 50
now big enough, it works.
So there is my circle.
Again, which one do you want to keep?
So you have various methods of determining the portion
or segment of the circle you want to keep.
And then Three points.
For this I have Point 1, Point 2,
just come over to Point 3, there's my circle.
And again, I have Geometry on support.
If I want to lay that down I can lay that down.
I have Axis Computation,
it'll give me the center point as well.
And again, I have my Limitations.
The rest of these are all variants,
like Center and axis.
So you'd pick a center point and an Axis line,
gives you the circle.
So these variants are all basically similar
to the first few that I covered.
So let's get into the next function at this point.
Now the next tool, very handy, it's called Corner.
And it's basically doing the same thing as the Circle,
but it's putting a corner in between two elements.
And in this case I'm going to start out with this curve
and this curve.
You'll notice that the 3D Corner is set,
the Direction is a Default Computation,
so it's doing a best fit
for the radius between those two curves.
It's going to be tangent.
And as I shrink this what you're going to notice
is other options begin to appear.
So these options are there,
because now the circle is actually small enough,
or the corner is actually small enough
to fit within these defined end points.
If I make it again too large
they begin to fall out.
This one can't be constructed, 'cause it falls off.
Same thing with the next as soon as I get a little larger.
And so on, until there's only the one option left.
If I want to, let me just actually select OK first,
you'll notice there's my corner.
And if I double-click on it I can also trim the elements,
so it keeps one long consistent element.
Double-click on that.
I also have Corner On Support,
so I can pick my Support plane.
In this case, the 3D Corner is just putting
a corner out in 3D space,
it's not necessarily sitting on the support.
But if I want it to sit on the support
I'd turn it on Corner On Support.
Once I select my Support it lays that down,
so now that curve is actually on the surface.
Trimming elements are the same.
The next option is what's called Corner on Vertex.
So if I come in here and I'm going to pick this curve.
You'll notice that it's basically those four segments.
I'm going to pick my curve
and rather than Corner On Support or any of the others
I'm just going to say Corner On Vertex.
And anywhere that there's an actual sharp corner,
a vertex, it's going to place a Radius.
So now I can describe sides of the Radius
and it automatically in this case, as you can see,
trimmed everything out.
You'll see here that there's no options
to not trim everything,
'cause I'm putting it on a vertex
it wants to trim everything out.