- [Narrator] In the first 3D sketching video,
I mentioned that a lot of the features are the same.
Then I specifically mentioned that the trim feature was
a little bit different.
One thing that I do want to talk about
is editing these features once they exist in 3D,
it can be kind of difficult.
So, you can grab certain items
and just drag them like you typically would.
I could grab this corner and move it up and down.
But you can see things, if I move them
not quite the right way, can snap into all kinds of chaos
so you really want to limit and constrain your geometry and
3D space as you go.
You can see this first point was automatically constrained
but you can do things like snap them along certain axes,
so if you want this to stay along particular axis,
you can snap it to it and this one, for example,
it's along the x.
Sometimes, it will give you when you select them,
for example, if I delete this, it'll tell you
with a little bit of a bold face here
that this is the one you probably wanted.
It already seems to be along the x-axis
and you can pick it and then fix it, if you want.
You'll notice here now that it's black,
just like it would be constrained in a 2D sketch,
that it's locked in the space, so we can see
those two constraints out here and here
in the existing relations.
But you really want to do this, especially
when you're working on things like routing pads,
you don't want to draw all of your geometry
and then have it invert in one direction and ruin
all of the pipes that you've created in the routing add-on
or any of the other electrical add-ons, or things like that.
So as you build in 3D, once you have the geometry you want,
even if it as simple as just clicking on it,
and making it fixed, that's enough most of the time
and then you can always go back and unfix it
and then manipulate a little bit.
But it's very easy just by dragging one point,
and I'm just kind of dragging it back and forth
and you can see what effect it's having on this sketch.
Now this is a little bit of a pretend sketch
that's a little bit wonky, but, if I
was going for a simple frame, this would do a lot of havoc
if I just started dragging this around,
and you can see if I do a little bit of a clockwise motion,
it starts snapping all over the place
and won't resolve back to where I started.
So, you have to be careful when editing in 3D,
work slowly, work deliberately, and try to build up
as many relationships and references as you can.
You know I mentioned in the previous video building
surfaces, you can make center lines and construction lines
in here as part of your geometry and start going across
and really connection all those points together,
if you have to, to try to lock 'em in space.
You can also add dimensions to them by going
to the Smart Dimension tool, and do things
like control the angles and specific planes,
or control the overall dimension of a length, for example.
In it's plane that it creates, like this one,
it just goes across from point to point.
So, do all those things, add all those constraints
and try to lock it down so that you don't
actually drag a point.
You just blow up your whole 3d sketch.