ENT135 Module 12 02

>> We are continuing with

using elevation
and thickness.

Creating a surface
with thickness,

you can create
simply surface by

adding a thickness to
two-dimensional object.

When you add a
thickness to

two-dimensional object,

the object is pushed

out into the
third dimension.

For example, a circle,

becomes cylinder, and

a rectangle become a box.

Remember that you won't
see the thickness

if you are looking at
the object from top.

Figure 2111.

Show some object created
using a thickness.

Surface created by
adding a thickness are

sometimes called
21/two-dimensional object.

Although they have
three-dimensional,

and the third
dimension can only be

straight side
perpendicular to

the two-dimension
object at base.

To add the thickness to

the existing
two-dimensional object,

display the
property palette,

Control 1, and
select the object.

You can see when you
select the object first.

In the palette, click the

"Thickness Property"
and change

the value in the text
box and press "Enter".

I'm going to try it here.

I'm going to draw
a rectangle.

Select a "Rectangle".

Right-click, go to
the "Properties",

property box, check
the thickness,

change that to fun.

Press "Enter",
close the property,

and choose a
southwest view.

We created a surface box,

change it to conceptual.

As you see,
it's not solid.

It's just a surface box.

Back to our book. You can

also change the
current thickness.

The current thickness
affect the new objects

as you draw them but

does not affect the
existing object.

There are two ways to

change the current
thickness.

With no object select,

display the
property palette,

click the "Thickness
Property" and type

a value in the textbox.
Press "Enter".

Use the ELEV command,

which can also change

the current elevation
discussed in

the adding elevation to

object section by typing

it on the command line.

The ELEV command
prompts you for

the current elevation
and current thickness.

At the pattern
for thickness,

type a number and
press "Enter".

In some cases, you can

use a positive
number which

extrude the object in

the positive direction
of the Z-axis.

However, you can use
a negative number to

extrude the objects in

the negative direction
of the Z-axis.

As soon as you change
the current thickness,

all the objects
that you draw,

they're going to have
the same thickness,

going back to AutoCAD.

So if I draw a circle now,

select the circle,

go through the properties,

change the
thickness to five.

Now, I'm not
selecting anything.

Just right-click
or Control 1.

Change the
thickness to 10.

From now on,
whatever I draw,

it's going to have
the 10 thickness.

Another box.

right-click, Control 1,

change the
thickness to five.

So let's draw a box again.

Doesn't work for the
box, I will circle.

So that's the topic
about the thickness.

We're going to Page 679,

talking about adding
elevation to object.

Until now, we
have discussed

three-dimensional object

based on the
two-dimensional objects

that were on X
and Y plane.

In other words, the Z
coordinates were zero.

Although you
generally don't

want the objects to
float in the air,

you certainly may want to

place one object
on top of another.

To do this, you
need to start

the object above
the XY plane.

You can also place
the object below

the XY plane and give
an object elevation,

which is in Z coordinates.

To give elevation to
an existing object,

you can use
several methods.

Select the object and

display the
property palette,

click "Elevation
Property",

type in new elevation

in the textbox and
press "Enter".

Or move the object with

the move command in
the z-direction.

Or use a 3D move command

to move the object
in z-direction.

We covered this in
the Chapter 24,

where we discussed
editing 3D dimensions.

For new object change,

the current elevation
with the ELEV command,

as described earlier
in the chapter,

in the thickness, but
we talk about that.

So if I type ELEV
as a command,

enter, specify new
default elevation.

The default
elevation is zero,

specify new
default thickness,

which is 4.1, which
was almost like five.

Can change this
one to five.

So select my object,

right-click properties,

and look for elevation.

Select object.

This Gizmo is
helping us to

move the object on
the z-direction.

Either we can move that
on the z-direction,

or we can check
the center Z,

change that to five.

Same thing for the box.

If I select the box,

I can find elevation
here is zero.

Going to change
that to 10.

As you see, it's
elevating it from

the 0,0 10 units up.

Or I could use this Gizmo

and manually
move that down.

On Page 680, steps
working with elevation,

thickness, and
height command,

start a new
drawing by using

ACAD DWT or ACAD
LTDWT template,

the dynamic user
coordinate system bottom,

and the status bar
should be off.

The template use
a 2D environment,

save it as AB 213-3

in your assignment folder.

Step 3, home tab,
drawing panel,

circle, drop down menu,

center radius to
start the circle.

Specify the center as

6,6 and then radius as 18.

Starting in 0,5,
ACAD, open.

Circle.

Center radius, center
is 6,6, radius 18.

Zoom back. If you
are using AutoCAD,

choose home type view

panel [inaudible]
navigation dropdown,

check on south-east
isometric.

Select the circle.

Display the
property palette.

Click on the thickness.

In the thickness
textbox type

3. Press "Enter".

Step 6, type 11.

At the specifying new

default elevation type 3.

Because you change
the existing

circle thickness to three,

you set the elevation to

three to place an
object on top of

the circle at specifying

new default
thickness Prompt 24.

Start circle.

Specifying center 6,6.

The radius of 18.

Step 7, radius of three.

Zoom out and pan
so you can see

the entire model
type ELEV enter.

At the specifying
new default type

27 because we have
three and 21,

24 and three is 27.

I'm going to draw

another circle
on top of here.

Specify new
thickness, type 3.

Start a circle
command again.

Same center 6,6,

and radius of 18.

Type height.

So you can see the
cables pull clearly.

Save this drawing. It
should look like Figure

2115 from the book.