- [Instructor] In the previous video,
I discussed hybrid design a little bit.
And with that setting turned off,
it becomes critical you understand
how the tree is organized.
You'll notice that in this case, I have the solid in here.
That solid body and all solid features
created in part design are going into the part body.
So, everything that I do automatically go to the part body.
Now below that, once we get into generative shape design,
you'll see these what's called geometrical sets.
Geometrical sets are meant for everything
that is not a solid.
So, surfaces, points, lines, all types of curves, STL data,
whatever you're bringing in will go into a geo set
unless it is a solid.
So as I look inside one of these geo sets,
you'll notice this one just has a singular point.
You'll also notice if I go into this one,
I have a couple of sketches.
Splitting elements has a plane,
an offset, extracts parallel.
Final is just as final split.
And you'll notice under operations
I have all sorts of features.
Here, I can create as many geometrical sets as I want
to organize the tree any way that I want to.
Within the CATIA modeling kernel,
a lot of people get kind of confused
because of the hide show of the geo sets
of the elements within the geo sets as well.
Now you'll notice under splitting elements
you'll see that the geo set
is hidden indicated by this gray square around the icon.
The elements below are shown
but I don't see anything on the screen.
Reason being is the set that they are in is hidden
so everything below them will also be hidden.
So I'm going to right mouse click over the top of that.
I'm going to hide show and you're going to see the elements
that are hidden by that geo set.
Now, if I independently hide these things,
you can see here those icons are now showing as grayed out,
indicating that they are hidden.
So, the actual geometrical set takes precedence
over the top of the elements contained within.
And this can be a little confusing for some
because I may have a geometrical set
inside of another geometrical set.
So if both of those geometrical sets are hidden,
I have to make sure that they are shown
in order to show the elements within.
So you can nest geo set inside of geo set inside of geo set
as deep as you want to go.
And it's going to be very useful
because as you go through working
with some of these tools in generative shape design,
some people get a little confused.
For example, under operations, I have this extrude.
I'm going to hide show that extrusion.
And you can see that I have the surface extruded out.
And then the next feature is an edge fillet.
I'm going to hide show that.
You'll see here, this edge fillet
is built off of this extrusion
but the extrusion is still shown.
By default, the way CATIA operates
is turns off what's called ghosting.
So, as I perform features,
the original base element stays in the tree,
it just gets hidden.
As you go through this course,
we'll talk about the benefits of that.
And again, for people coming off of other CAD systems
or are new to this, this can be a little confusing
because the actual base element is no longer consumed.
It stays within the tree for you to use over and over again.
So if I hide this, you'll see that is that edge fillet.
And I can go through the tree.
But like that, you can see there's the next one and so on.
This is almost a script.
So these are the various elements
that the geo set can contain.
Now, as I'm working through and I want to make sure
that I put the elements in the correct location in the tree,
I can either take the geo set itself.
For instance, splitting elements.
I can right mouse click on that.
I can go all the way to the bottom of that menu that pops up
and here, I can say, change geometrical set.
So I can change the location of a geo set.
So in this case, if I want to put it in inputs, select OK,
you'll see that it now appears under inputs.
So again, inputs is hidden so anything within this geo set
is now going to be hidden.
This is the parent to all of these.
If I wanted to move a singular element,
I can right mouse click over one of those elements,
change geometrical set, and move it into the new location.
So again, all I'm doing is right mouse clicking,
telling it I want to move it, selecting where I want it to go,
select OK, and now you'll notice that it is no longer nested
inside of the splitting elements.
Organizing your tree becomes very important.
If you're dealing with very large files,
for example, a body side on a car,
you may have a thousand features.
And you're going to want to organize that tree
into logical geometrical sets with the features
that make a specific shape.
So if I'm making a rebate,
basically a pocket that's inside of a body side,
basically the structure underneath what you look at
on the side in a car,
you're going to want to label what that rebate's for.
Maybe it's for a tail lamp cut out or a side lamp pocket
or a door pocket.
And organizing your tree in such a way
will make things a lot easier
not only for you but anybody
that gets their hands on that model afterward.
So, as I'm going through and creating my geometry,
I can come into, let's say operations.
If I want to create something I can right mouse click here,
I can say define in work object, I get my little underline.
So, as I'm creating something,
it automatically goes into that geo set
versus having to move it afterwards.
So if you made a mistake,
you put some elements in the wrong place,
you can go back and move them.
But as you're designing, as you're working, creating,
you can easily just use the define in work object.
Right mouse click, define in work object,
to change where the geometry will automatically go to.