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Identify when to use 3D polylines, and create several different 3D polylines.
Type:
Tutorial
Length:
4 min.
Transcript
00:04
Just the name 3D Polyline tells us that
00:06
this object is different than a regular Polyline.
00:09
But exactly what is a 3D Polyline?
00:12
When is it useful
00:19
These elevation values are applied at each vertex
00:23
or change in direction along the 3D Polyline
00:33
In a plan view of your drawing 3d poly lines will look like regular poly lines.
00:38
The only difference is that they will have elevation values applied.
00:42
Let's discuss a possible project design scenario in
00:46
which 3D poly lines would be useful.
00:49
After discussing the example,
00:51
I will demonstrate creating and editing 3d poly lines.
00:57
Here's an architectural example.
00:60
You may want to lay things out in 3d to see
01:03
how the components relate to each other in a spatial environment.
01:06
In
01:07
this example, we could take a standard 3D room layout,
01:11
apply elevations to the top and bottoms of a wall
01:15
and then create additional items to see how
01:18
they will relate to the elevations of those walls
01:21
with the ability to see relationships in 3D architects
01:25
and designers could create preliminary models in AUTOCAD,
01:29
which could later be brought into a BM environment.
01:32
When further 3D modeling is required
01:37
to create a 3D poly line,
01:39
you can either type in three P at the command line or come to the home tab.
01:46
Click on the draw, drop down
01:48
and click on the 3D poly line.
01:52
After starting the command,
01:53
you're prompted to specify a start point of the poly line,
01:60
you can then click the points that you want for your 3d Polyline.
02:04
One major difference between regular poly lines and 3d poly lines is
02:09
that 3d poly lines do not have the same command line options
02:14
as two D poly lines.
02:16
Of particular note is the arc option.
02:19
Although this option is missing,
02:21
there is a workaround for this that I will discuss later in this video.
02:26
Now I'm gonna start laying out the 3D poly lines for this example.
02:31
So I will go ahead and type in 20
02:35
ft
02:36
and then enter.
02:38
So my first 3d polyline is created,
02:42
I'll now go ahead and create the second one
02:46
entering 23 ft.
02:50
And now what I could do is use the copy command
02:58
to copy each of these lines over or I could have
03:03
drawn them as well.
03:07
So now that I have the base for this,
03:11
I'll go ahead and use the copy command again
03:18
and I'm going to copy
03:21
what I have from endpoint
03:24
to endpoint
03:26
so that I have double the lines.
03:33
One thing I want to point out
03:36
is if we look at one of our elevations,
03:39
we have a sloping wall
03:42
that starts 8 ft away from this wall. So one thing I'm gonna do
03:47
is I'm gonna use a regular poly line
03:52
as a construction line
03:54
and I'm going to use the offset command to offset it 8 ft.
03:59
Now, the reason for this is 3d poly lines cannot be offset.
04:08
Then I'll use the copy command
04:11
afterwards.
04:13
Or actually I'll use the copy command
04:19
to copy this line from endpoint to end point.
04:23
And then I'll delete my polyline construction line.
Video transcript
00:04
Just the name 3D Polyline tells us that
00:06
this object is different than a regular Polyline.
00:09
But exactly what is a 3D Polyline?
00:12
When is it useful
00:19
These elevation values are applied at each vertex
00:23
or change in direction along the 3D Polyline
00:33
In a plan view of your drawing 3d poly lines will look like regular poly lines.
00:38
The only difference is that they will have elevation values applied.
00:42
Let's discuss a possible project design scenario in
00:46
which 3D poly lines would be useful.
00:49
After discussing the example,
00:51
I will demonstrate creating and editing 3d poly lines.
00:57
Here's an architectural example.
00:60
You may want to lay things out in 3d to see
01:03
how the components relate to each other in a spatial environment.
01:06
In
01:07
this example, we could take a standard 3D room layout,
01:11
apply elevations to the top and bottoms of a wall
01:15
and then create additional items to see how
01:18
they will relate to the elevations of those walls
01:21
with the ability to see relationships in 3D architects
01:25
and designers could create preliminary models in AUTOCAD,
01:29
which could later be brought into a BM environment.
01:32
When further 3D modeling is required
01:37
to create a 3D poly line,
01:39
you can either type in three P at the command line or come to the home tab.
01:46
Click on the draw, drop down
01:48
and click on the 3D poly line.
01:52
After starting the command,
01:53
you're prompted to specify a start point of the poly line,
01:60
you can then click the points that you want for your 3d Polyline.
02:04
One major difference between regular poly lines and 3d poly lines is
02:09
that 3d poly lines do not have the same command line options
02:14
as two D poly lines.
02:16
Of particular note is the arc option.
02:19
Although this option is missing,
02:21
there is a workaround for this that I will discuss later in this video.
02:26
Now I'm gonna start laying out the 3D poly lines for this example.
02:31
So I will go ahead and type in 20
02:35
ft
02:36
and then enter.
02:38
So my first 3d polyline is created,
02:42
I'll now go ahead and create the second one
02:46
entering 23 ft.
02:50
And now what I could do is use the copy command
02:58
to copy each of these lines over or I could have
03:03
drawn them as well.
03:07
So now that I have the base for this,
03:11
I'll go ahead and use the copy command again
03:18
and I'm going to copy
03:21
what I have from endpoint
03:24
to endpoint
03:26
so that I have double the lines.
03:33
One thing I want to point out
03:36
is if we look at one of our elevations,
03:39
we have a sloping wall
03:42
that starts 8 ft away from this wall. So one thing I'm gonna do
03:47
is I'm gonna use a regular poly line
03:52
as a construction line
03:54
and I'm going to use the offset command to offset it 8 ft.
03:59
Now, the reason for this is 3d poly lines cannot be offset.
04:08
Then I'll use the copy command
04:11
afterwards.
04:13
Or actually I'll use the copy command
04:19
to copy this line from endpoint to end point.
04:23
And then I'll delete my polyline construction line.
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