- [Narrator] When working in 2D sketches,
you don't want to limit yourself to lines, rectangles
and the other basic shapes and entities that are here
up in the command ribbon.
If we start a new sketch, I'm going to go to the
sketch entities and you see here listed we have ellipse,
partial ellipse, parabola and conic.
So as opposed to these shapes which are just our typical
geometric shapes, we got ones that are a little bit more
complex, you can call them almost equation driven,
style shapes.
Let's run through how to make each of these real quickly,
they're pretty easy.
I'm going to start with ellipse.
You basically select your starting point, drag out
one direction and then you drag out the other direction
to make your ellipse.
So basically, in this case I'm doing the height of
my ellipse and then the width.
Click OK and then we get the four points around the ellipse.
Now if I want to orient this for example, I can select
these three points here and then make them vertical.
I can also add dimensions.
And constrain it as I like.
So you can see here that's pretty easy
and that's an ellipse.
Moving on to the next one, let me go to a partial ellipse.
Same concept, start with a center point, choose your height
in this situation, then your width, but then you draw
how much of the ellipse you want to have in that
particular shape.
So in this situation, I'm going to do about three quarters of
the way around, click OK.
The only difference being here, we have a virtual end point
for the other side of the ellipse and the ability to drag
these ellipse end points around and follow that shape.
So pretty cool feature and you could use this if you're
making some ergonomic shapes for a device and then you want
to have a flat face on the inside or something like that.
Moving through to the next entities, we now have
the parabola, pretty simple.
Select your midpoint of the arc.
And then your going to select the height of the parabola,
so you see I'm increasing the magnitude.
So I did my first click, just waiting for my graphics
to catch up here.
Now with my second click, I can draw the parabola.
So again I've got my two control points in the center here
and if I select both of them, I can snap them to vertical,
I can drag each side of the parabola out, I can make them
equal by snapping them horizontal, for example, to each
other and drag it up and down but that gives me a simple
parabola which I can then adjust its location.
Moving through to the next one, we have conic.
And that again is very similar to the parabola,
we just simply select a point, select the second point
and then we start dragging out to make the conic.
Now this can be used for when you're doing surfacing.
I accidentally hit escape, you want to make sure not
to do that.
So again I'm selecting my first point, drag point and now
I'm pulling out that conic where I want it to be.
Clicking again we accept.
And you can see I got the two control handles here to drag
that out in any which way.
It's basically like a spline but with different controls.
Now a little bit more stable.
And you can see it always maintains that cone as you pull
it around in any direction.
So pretty cool features here, you can get some very
nice shapes out of these and they've got pretty simple
controls and you do have the ability to go back and add
relations and dimensions to all of them.
So remember that you always have the ability to make
an ellipse, a parabola or a conic, which can be very useful
when doing surfacing and other complex geometry.