- [Instructor] So here I want to talk
about mirroring features and geometry.
Again, you can mirror a feature.
It's things like holes that are applied.
That type of stuff.
Something that's been Booleaned out,
adding, removing material to a body.
The mirror geometry is taking the
entire body and mirroring it across.
Whether it's a surface or a body, solids, whatever.
So in this case, I have a hole
and I'm going to go into the More button
and you'll see there's my Mirror Feature,
Mirror Geometry.
I'm gonna start out with Mirror Feature.
I want to take that hole, select a plane,
cross that plane and select OK.
So there's my mirror.
Now, if you're not careful, when you
do your mirror, especially on a Mirror Feature
like this edge blend, if I try to mirror
this across the same plane it looks
like it's gonna do it.
Throws up the signal saying, hey you know,
everything's good.
But as soon as I hit OK, you get
this big scary message that pops up
and says, hey I can't do it.
The reason why I can't do it is because
technically there's no edge across
the mirror plane for it to mirror across.
So it throws up an error.
Historically it's always been kind of
bad mojo to mirror blends and things
of that nature.
It's just either you apply it separately
or go back in and make sure that
if you are going to mirror across plane
that it is truly symmetrical.
So I'm just gonna undo that.
The next mirroring tool I want to talk about
is Mirror Geometry.
And now, it's going to mirror the entire body.
Notice that when I come over here
it's not allowing me to pick a singular feature.
It's picking the whole body.
What plane am I going to mirror across?
Well, I'm gonna pick this plane.
You'll see it takes it, mirrors it,
everything's great.
Now, if I wanted to change my mirroring plane.
This is a little warning.
You'll see, you know, you have a plane
creation tool here.
But, just to let you know that
you just can't simply come in and pick
the next face because if you do,
what the system thinks you're trying
to do is get the bisector of those two faces.
So in this case it's bisecting this face
and this face, creating a new plane
and doing the mirror.
Chances are that's not what you want.
If by chance, I'm just gonna restart everything.
Mirror Geometry, that, cross that plane again.
If by chance you do want to use a different face,
what I recommend you do is you deselect
the original plane first.
And again, as I noted before in
a previous video, if you hold the Shift key down
and pick the object you'll see
it's deselecting that plane.
And then, when I reselect the new plane
I get the plane that I expect to get.
And, select OK.
Also, on this note, just because
I mirrored the geometry does not mean
these are united.
These are still two different bodies.
And this is where you go into Unite,
select the original body, select the tool body
and select OK.
Now you can see that seam down the center is gone.
Those bodies are now united.
If I make a change, that change will
reflect on that mirrored part.
So change that, fill it.
Maybe I want to add it to this corner.
And it's updated.