& Construction
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Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
& Manufacturing
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Professional CAD/CAM tools built on Inventor and AutoCAD
Transcript
00:03
To develop this bottom edge of the side panels,
00:06
the topology will have to reflect all of these different directions.
00:10
And for this, I can use the Cut
00:13
the Weld and Unweld and the Extract tools.
00:16
So I'll need an extra face down here, so I'll just use Extrude
00:21
and make sure that's set to Subdiv Edges.
00:24
And this will weld to the origin edge but not to the side here.
00:30
So I can do that manually using the Weld tool.
00:34
And To Target means that I pick one vertex or edge
00:38
and then ask it to move and join to this one.
00:41
Or if I undo that
00:44
To Midpoint finds the center position.
00:46
And so I can just drag-select the vertices to join them in the middle.
00:52
And to show you the Tolerance option first, I'm going to use Unweld.
00:56
So if I wanted to separate out this fender, for example,
00:60
I could pick this edge loop and then choose Unweld.
01:03
And you can see that it's now a separate SubD.
01:08
But if I undo just the move,
01:11
these are still separate subdivs with the vertices pretty much coincident
01:16
and certainly within this tolerance.
01:19
So when I box-select and let go,
01:22
only the close or coincidence CVs are welded.
01:28
Over here on the hood, I could use Unweld again,
01:31
but I can also just pick the faces and do Extract
01:35
with Keep original off.
01:37
Then it works just like a cut and paste for SubD faces.
01:42
And then at this frontage,
01:45
if this time I use Extract with Keep original on,
01:49
then it's the equivalent of a copy and paste
01:52
because the normal copy and paste tools don't work on subdiv faces,
01:56
so we use Extract instead.
01:58
And then I could use that to start some new geometry
02:02
which starts out with the same structure and shape as the hood.
02:06
So Weld and Extract work within the existing topology and edge flow.
02:11
But if I now go back to the body side
02:14
and just get this angle how I want it.
02:18
I'm wanting to create an indent feature here.
02:20
So I'm going to need to change the flow of the topology.
02:24
So I'll start with a simple Insert
02:28
and then to add edges across here, I can now use the Cut tool
02:33
and so Cut works on CVs and edges.
02:37
And when Both is set, then I can use the Ctrl key for point snap on a vertex,
02:42
but just click and drag for an edge.
02:46
And I could use this Offset parameter if I want a particular value.
02:49
But more typically we just click and drag by eye
02:53
and that will give me these new edges
02:57
and I don't want a triangle
02:58
so I can cut again from this point to this edge.
03:03
And then I can just pick this edge,
03:05
not this one
03:06
and hit Delete on the keyboard to get back to a quad.
03:11
And then I can adjust the shape a bit if I want to.
03:15
But now I've got a five sided face here
03:18
so I can use Cut again, and I've got a choice of how to work.
03:22
I can either click on each edge to get the flow that I want
03:27
or if I undo that
03:29
I can also just get into a view where for example, this edge is lined up
03:34
and then just click all the way across
03:36
to create a cut that gives me a good layout.
03:42
So all that work reorganizing the topology now allows me to pick these edges.
03:48
And I'll just unpick those
03:51
and move them inwards to create a fully
03:53
controlled light catching feature along the bottom edge.
04:01
And then finally, I could add an extra edge here using Insert,
04:06
but I can also use Cut in a different mode.
04:10
So when my first click is not on the geometry,
04:13
then the second creates this cut line which is actually viewport based.
04:17
So you can see that I can move the model around and get it lined up
04:21
or adjust that cut line
04:24
and then hit Cut Through.
04:26
And that adds the new edges which I can just pick and move to tidy up the shape.
04:34
So Weld and Cut allow you to change the flow of the topology
04:38
to develop the features that you want on your design.
00:03
To develop this bottom edge of the side panels,
00:06
the topology will have to reflect all of these different directions.
00:10
And for this, I can use the Cut
00:13
the Weld and Unweld and the Extract tools.
00:16
So I'll need an extra face down here, so I'll just use Extrude
00:21
and make sure that's set to Subdiv Edges.
00:24
And this will weld to the origin edge but not to the side here.
00:30
So I can do that manually using the Weld tool.
00:34
And To Target means that I pick one vertex or edge
00:38
and then ask it to move and join to this one.
00:41
Or if I undo that
00:44
To Midpoint finds the center position.
00:46
And so I can just drag-select the vertices to join them in the middle.
00:52
And to show you the Tolerance option first, I'm going to use Unweld.
00:56
So if I wanted to separate out this fender, for example,
00:60
I could pick this edge loop and then choose Unweld.
01:03
And you can see that it's now a separate SubD.
01:08
But if I undo just the move,
01:11
these are still separate subdivs with the vertices pretty much coincident
01:16
and certainly within this tolerance.
01:19
So when I box-select and let go,
01:22
only the close or coincidence CVs are welded.
01:28
Over here on the hood, I could use Unweld again,
01:31
but I can also just pick the faces and do Extract
01:35
with Keep original off.
01:37
Then it works just like a cut and paste for SubD faces.
01:42
And then at this frontage,
01:45
if this time I use Extract with Keep original on,
01:49
then it's the equivalent of a copy and paste
01:52
because the normal copy and paste tools don't work on subdiv faces,
01:56
so we use Extract instead.
01:58
And then I could use that to start some new geometry
02:02
which starts out with the same structure and shape as the hood.
02:06
So Weld and Extract work within the existing topology and edge flow.
02:11
But if I now go back to the body side
02:14
and just get this angle how I want it.
02:18
I'm wanting to create an indent feature here.
02:20
So I'm going to need to change the flow of the topology.
02:24
So I'll start with a simple Insert
02:28
and then to add edges across here, I can now use the Cut tool
02:33
and so Cut works on CVs and edges.
02:37
And when Both is set, then I can use the Ctrl key for point snap on a vertex,
02:42
but just click and drag for an edge.
02:46
And I could use this Offset parameter if I want a particular value.
02:49
But more typically we just click and drag by eye
02:53
and that will give me these new edges
02:57
and I don't want a triangle
02:58
so I can cut again from this point to this edge.
03:03
And then I can just pick this edge,
03:05
not this one
03:06
and hit Delete on the keyboard to get back to a quad.
03:11
And then I can adjust the shape a bit if I want to.
03:15
But now I've got a five sided face here
03:18
so I can use Cut again, and I've got a choice of how to work.
03:22
I can either click on each edge to get the flow that I want
03:27
or if I undo that
03:29
I can also just get into a view where for example, this edge is lined up
03:34
and then just click all the way across
03:36
to create a cut that gives me a good layout.
03:42
So all that work reorganizing the topology now allows me to pick these edges.
03:48
And I'll just unpick those
03:51
and move them inwards to create a fully
03:53
controlled light catching feature along the bottom edge.
04:01
And then finally, I could add an extra edge here using Insert,
04:06
but I can also use Cut in a different mode.
04:10
So when my first click is not on the geometry,
04:13
then the second creates this cut line which is actually viewport based.
04:17
So you can see that I can move the model around and get it lined up
04:21
or adjust that cut line
04:24
and then hit Cut Through.
04:26
And that adds the new edges which I can just pick and move to tidy up the shape.
04:34
So Weld and Cut allow you to change the flow of the topology
04:38
to develop the features that you want on your design.
Required for course completion