Graphics Programs Reference
In-Depth Information
On right-clicking over the UCS icon, all creation options as well as a list of saved
UCSs are displayed.
Important variables to know
AutoCAD has several variables related to the coordinate systems, which affect its
behavior when creating a UCS or changing a view direction. Here are the most im-
portant ones:
•
UCSFOLLOW
: On activating a UCS while keeping the value of
UCSFOLLOW
as
1
, the view changes to the respective plan view. It has a value of
0
by
default and is saved in the drawing.
•
UCSVP
: When working with more than one viewport, this variable allows
for having an independent UCS per viewport (value
1
) or only one UCS
in all viewports (value
0
). It has a value of
1
by default and is saved in the
drawing.
•
UCSORTHO
: It controls whether the corresponding orthographic UCS is
activated (value
1
) or not (value
0
) when changing the view to an ortho-
graphic view. It has a value of
1
by default and is saved in the registry.
•
UCSDETECT
: It controls if dynamic UCS is on (value
1
) or not (value
0
). It
has a value of
1
by default and is saved in the registry.
•
UCSSELECTMODE
: It controls whether the UCS icon can be selected,
moved, and oriented (value
1
), or not (value
0
). It has a value of
1
by de-
fault and is saved in the registry.
Exercise 3.1
We will draw some linear objects in different planes of a 3D model included in the
accompanying files.
1. Open the
A3D_03_01.DWG
file. It represents a part with several planes
that are not aligned with the WCS.
2. Create a UCS aligned with the front face. Apply the UCS command and
click on the lower-left corner, lower-right corner, and any upper vertex on
that face, in the said sequence:
Search WWH ::
Custom Search