Chapter 1 Introduction to Three-Dimensional Modeling
33
Converting to a Region
The object is still composed of just 2D lines. Therefore, it must be changed to an
object that can be converted into a solid model. The
REGION
command is used for this
purpose. After selecting this command, you are prompted to select objects. Be sure to
pick all of the lines of the object. After pressing [Enter], you are prompted that a loop is
extracted, a region is created, and, if constraints were applied, that they are removed.
The appearance of the object will not change.
Converting to a Solid
The object is now a “region” that can be quickly converted to a solid. First change
to the
3D Modeling
workspace, and then use the viewport controls or the view cube to
display the object from the southwest isometric viewpoint. Working with models is
more intuitive when a 3D display is used. See Figure 1-20C.
The region can be converted to a solid using either the
EXTRUDE
or
PRESSPULL
command. For example, pick the
Extrude
button in the
Modeling
panel on the
Home
tab of the ribbon and select the region. Using direct distance entry, enter a height of .55,
as shown in Figure 1-21, and press [Enter].
Using a Visual Style
The object you have created is now a 3D solid. If the drawing was based on the
acad3D.dwt
template, the model is displayed in the
Realistic
visual style. If the drawing was based on
the
acad.dwt
template, the model is displayed in the
2D Wireframe
visual style.
As mentioned previously, there are 10 different visual styles from which to choose.
Select an option from the
Visual Style Controls
fl yout in the viewport controls or the fl
View
panel on the
Home
tab of the ribbon. The
Conceptual
visual style provides a quick
display of the model using shaded tones of the object color, as shown in Figure 1-22.
The techniques used in this example are just a brief introduction to the creation
of 3D models. Detailed descriptions of modeling, display, and editing techniques are
included in the following chapters.
REGION
Ribbon
Home
Draw
Region
Type
REGION
REG
EXTRUDE
Ribbon
Home
Modeling
Extrude
Type
EXTRUDE
EXT
Figure 1-21.
The object is
extruded into a solid
and displayed as a
wireframe.
Enter the extrusion
distance
Select the
command