& 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
The Subdivision Bridge tool builds faces between opposite edges
00:10
and you can have a different number of edges on each side,
00:13
and I can use space bar for Build,
00:16
but you'll end up with a multi-
00:18
sided face, and that means your limit surfaces will be overly complex.
00:23
So I'll undo that.
00:25
And what you typically do with Bridge is think about the topology first.
00:29
So if I want to create this feature here,
00:32
I can move and scale these vertices to line them up
00:36
and that gives me two edges here.
00:40
And then over at the rear,
00:41
I can start to think about how the wheel
00:43
arch is gotta stretch up to this shoulder line.
00:48
And I'm keeping the topology really simple at this stage.
00:55
And this time, I'll double click on Bridge to open the option window
00:59
and I'll pick two edges here
01:01
and then two on this side
01:03
and space bar for Build.
01:06
And that builds a straight line connection.
01:09
Because I've got the window open, I can choose how many divisions I want in between.
01:15
And then I can just move these vertices inwards a bit
01:18
to shape that side panel.
01:21
And I'll just turn off the sketch.
01:24
And so you can see that the new faces are welded and blended
01:27
into the edges I've built from.
01:31
Here at the back,
01:32
I've already arranged the vertices to have three edges here and three here.
01:37
And I'm also going to just delete these faces so that I can rethink the topology.
01:43
So I could do just a normal flat bridge across here.
01:47
But there's also the option of creating a path curve to influence the shape.
01:52
So I'll use an edit point curve
01:54
and I'll just give that a little bit of shape.
01:58
And like before we can use Shift-select with the Add mouse button,
02:03
but I can also drag-select because you can't bridge to an internal edge,
02:07
so they don't even get selected.
02:10
So pick the curve
02:12
and then do the build.
02:13
And you can see that instead of a straight line,
02:16
the bridge is roughly following the curve shape.
02:21
In practice though, it's often just as easy to pick and move the vertices instead.
02:28
And then to finish off, I could just bridge across here.
02:31
But if I end up creating non-matching topology,
02:34
then this side edge doesn't get welded.
02:40
So I can undo that, and this time get the topology matching,
02:44
and then you can see that it's welded on the side as well as the two ends.
02:53
And finally, I've got a section of wheel here
02:55
and I've just revolved a front and a back SubD
02:60
and I'll just make the box shading a bit transparent here
03:02
so I can see all of the faces.
03:06
And so bridging across edges is our typical workflow,
03:10
but you can also use faces.
03:13
So I'll drag-select all these faces on both sides.
03:17
And when a closed loop is selected,
03:18
these arrows appear to correct any twisting that might happen.
03:23
And then when I build, all those faces are deleted
03:26
and new bridge faces are created across the resulting edges.
03:31
So it's not a common workflow, but it can occasionally be useful.
00:03
The Subdivision Bridge tool builds faces between opposite edges
00:10
and you can have a different number of edges on each side,
00:13
and I can use space bar for Build,
00:16
but you'll end up with a multi-
00:18
sided face, and that means your limit surfaces will be overly complex.
00:23
So I'll undo that.
00:25
And what you typically do with Bridge is think about the topology first.
00:29
So if I want to create this feature here,
00:32
I can move and scale these vertices to line them up
00:36
and that gives me two edges here.
00:40
And then over at the rear,
00:41
I can start to think about how the wheel
00:43
arch is gotta stretch up to this shoulder line.
00:48
And I'm keeping the topology really simple at this stage.
00:55
And this time, I'll double click on Bridge to open the option window
00:59
and I'll pick two edges here
01:01
and then two on this side
01:03
and space bar for Build.
01:06
And that builds a straight line connection.
01:09
Because I've got the window open, I can choose how many divisions I want in between.
01:15
And then I can just move these vertices inwards a bit
01:18
to shape that side panel.
01:21
And I'll just turn off the sketch.
01:24
And so you can see that the new faces are welded and blended
01:27
into the edges I've built from.
01:31
Here at the back,
01:32
I've already arranged the vertices to have three edges here and three here.
01:37
And I'm also going to just delete these faces so that I can rethink the topology.
01:43
So I could do just a normal flat bridge across here.
01:47
But there's also the option of creating a path curve to influence the shape.
01:52
So I'll use an edit point curve
01:54
and I'll just give that a little bit of shape.
01:58
And like before we can use Shift-select with the Add mouse button,
02:03
but I can also drag-select because you can't bridge to an internal edge,
02:07
so they don't even get selected.
02:10
So pick the curve
02:12
and then do the build.
02:13
And you can see that instead of a straight line,
02:16
the bridge is roughly following the curve shape.
02:21
In practice though, it's often just as easy to pick and move the vertices instead.
02:28
And then to finish off, I could just bridge across here.
02:31
But if I end up creating non-matching topology,
02:34
then this side edge doesn't get welded.
02:40
So I can undo that, and this time get the topology matching,
02:44
and then you can see that it's welded on the side as well as the two ends.
02:53
And finally, I've got a section of wheel here
02:55
and I've just revolved a front and a back SubD
02:60
and I'll just make the box shading a bit transparent here
03:02
so I can see all of the faces.
03:06
And so bridging across edges is our typical workflow,
03:10
but you can also use faces.
03:13
So I'll drag-select all these faces on both sides.
03:17
And when a closed loop is selected,
03:18
these arrows appear to correct any twisting that might happen.
03:23
And then when I build, all those faces are deleted
03:26
and new bridge faces are created across the resulting edges.
03:31
So it's not a common workflow, but it can occasionally be useful.
Required for course completion