>> Chapter 24, creating

solids and editing
in two dimensional.

In this chapter,
we are working

on creating basic
geometric shape,

drawing extrude,
sweep, revolved,

lofted and
polyline solids,

manipulating
solid directly,

creating a mesh shape.

Drawing a basic
smooth solid,

AutoCAD make it easy to

create the most basic

two dimensional
geometric shape.

These shapes are easy
to draw because you can

dynamically see the result

as you draw like
this solid box.

To draw the box,
follow these steps.

Choose Home tab,
modeling panel to

this solid
drop-down menu box

at the specifying
first corner.

Specify any corner of

the box or right click
and choose a center,

we are going to continue
with the corner.

If you specify the corner,

you see the specifying
other corner.

Going back to AutoCAD,

raising surfaces,

changing the workplace
to 2D modeling.

Under Home tab,
modeling box,

choose a box, select
the first corner,

second corner,
give a height.

Drawing wedge.

Wedge is a box slide
diagonally in half.

The prompts are virtually

the same as for
the box command,

as is shown in
this figure.

To create a wedge,
follow these steps.

Choose Home tab,
modeling panel,

3D solid drop-down menu,

wedge at the specifying
first corner,

specify any corner
of the wedge.

If you specify the corner,

you then see the specified
the other corner.

And then if you
specify the corner,

asking you to
specify the slope,

going back to AutoCAD,

home tab modeling
panel wedge,

specify first corner,
specify second corner,

and give the height
for the slope.

One more time.

Drawing cone,

you can draw a cone with

a circle or
elliptical base.

By specifying the
negative height,

you can create the
inverted cone,

like the examples here.

Follow these steps
to draw a cone.

Choose Home tab,

modeling panel, 3D
solid drop-down cone.

At the specifying
center point,

specify the center of

the base if you want
to the circle cone.

Otherwise, you can
use three point,

two point tangent
r or radius option

to define the circle base.

Use the elliptical option

to define elliptical base.

At the specifying height,

specify the height by

dragging or
entering a value.

Cone, center point of

the circle and
specify height.

Drawing sphere.

Spheres are not used
very often alone,

but they can be
the basic basis

for more complex model.

They centrally
look pretty.

Figure 24.5 shows
two solid spheres.

The left spheres use

the default isolines
value of four,

the right sphere use

a isoline value of eight.

The isoline
system variable

controls a number of

isolines that
are displayed

on the curve three
dimensional solid.

Isolines cannot
be snapped.

Two, but are a help
visualizing eight.

For more information, you

can check Chapter 22.

To draw a sphere,
follow these steps.

Choose a Home tab,

modeling panel, 3D,

drop-down menu sphere at

the specifying
center point,

specify center
of the sphere.

If you want the
sphere to lie

on the xy plane,

the z-coordinate
of the center

should be equal to the
radius of the sphere.

Use a two point,

three point or
Tangent option

to define a circle

at the center
of the sphere.

At the sphere
radius, prompt,

drag and pick a
point on the surface

of the sphere or

enter a value
for the radius.

You can use a
diameter option

to specify the diameter.

Sphere, center, and

the radius.
Drawing cylinder.

Cylinders are very common

in two dimensional
motoring,

both in building models
and creating a holes.

Figure 24, it's
going to be next

page shows three
solid cylinders.

The grid helps you to
visualize the xy plane.

You can draw a
cylinder with

a circle or
elliptical base

by specifying the center

of the top of the
cylinder sphere.

You can draw it
at an angle.

Follow the steps to
draw a cylinder.

Choose a Home tab,

modeling panel 3D

solid drop-down
menu cylinder,

a specifying point,

specify center point
of the circle,

or define the circle
by using a two point,

three point or
Tangent option.

You can also choose

elliptical
option to define

an ellipse as a base

at the specifying height,

specify height by dragging

entering value or using
a two point options.

Drawing a torus. A torus

is a solid three
dimensional doughnut,

as shown in the
next page picture,

with a part of a
torus labeled,

you can make some
unusual shape

by varying the torus
and tube radius.

If the torus radius
is negative and

the tube radius
is larger than

the obvious value of
the torus radius,

for example, -2 and three,

you create a lemon
or football shape.

If the tube
radius is larger

than the torus radius,

you create the
puckered ball

or apple shape to

create a torus
follows the steps.

Choose Home tab,
modeling panel 3D solid

drop down torus at

the specifying
center point.

Specify center of a torus.

You can use a two point,

three point or
Tangent option.

To define the
circle as the basis

in the torus at the
specifying radius,

specify the radius of

the entire torus on

the diameter option
to specify diameter.

At the specifying
the radius,

specify the radius
of just the tube

or use a diameter option

to specify the
tube diameter.

You can use the two
point option to pick

two points that define
the tube radius.

That's a torus.

Do you want
apple or lemon?

Apple.

And another torus.

Torus radius two
tube radius three.

Drawing panel pyramid, you

can draw a pyramid
with the bases

of 3-32 sides.

The prompts for
the base are

similar to the prompts

of the polygon command.

A pyramid can
come to point or

you can truncate it.

You can also tilt
the pyramid,

as shown in this figure.

So follow the steps
to draw a pyramid.

Home tab,
modeling panel 3D

solid drop down pyramid.

The default number
of side is listed

as well as whether
the base will

be inscribed or
circumscribed

at the specified
center point,

specify the center
of the base.

You can use the
edge option or

a side option at the
specifying radius,

drag to specify the radius

enter or enter a value.

You can use the inscribed

option to change
the whether

the radius is inscribed,
or circumscribed.

At the specifying height,

drag to specify the
height to enter a value,

use a two point
option to specify

the height by
picking two points.

Use the axis endpoint
to specify the tip.

If it's not directly
over the basis,

center, you tilt
the pyramid,

use the top radius to
truncate the pyramid,

drag or enter a value of

the tops radius and

then enter the height
of the pyramid.

Next video is going
to follow with

the steps drawing
basic 3D solid.

So find the file
ab24-a. Thank you.