2011

Table Of Contents
up direction A vector defining what direction is Up. By default this is the
positive Z axis (0,0,+1).
The up direction and the north direction are always constrained such that
they are perpendicular to each other.
user coordinate system (UCS) A user-defined coordinate system that defines
the orientation of the X, Y, and Z axes in 3D space. The UCS determines the
default placement of geometry in a drawing. See also world coordinate system
(WCS).
user parameter Named user-defined variable (real number or an expression)
that can be used in expressions for dimensional constraints or other user
parameters.
UVW The materials coordinate space. Used instead of XYZ because that is
usually reserved for the world coordinate system (WCS). Most material maps
are a 2D plane assigned to a 3D surface. The U, V, and W coordinates parallel
the relative directions of X, Y, and Z coordinates. If you look at a 2D map
image, U is the equivalent of X, and represents the horizontal direction of the
map. V is the equivalent of Y, and represents the vertical direction of the map.
W is the equivalent of Z and represents a direction perpendicular to the UV
plane of the map.
vector A mathematical object with precise direction and length but without
specific location.
vertex A location where edges or polyline segments meet.
view A graphical representation of a model from a specific location (viewpoint)
in space. See also viewpoint and viewport. (3DORBIT, VPOINT, DVIEW, VIEW)
view category A named collection of views in a sheet set that is often
organized by function. See also subset.
ViewCube User interface element that displays the current orientation of a
model, and allows you to interactively rotate the current view or restore a
preset view.
viewpoint The location in 3D model space from which you are viewing a
model. See also view and viewport. (3DORBIT, DVIEW, VPOINT)
viewport A bounded area that displays some portion of the model space of a
drawing. The TILEMODE system variable determines the type of viewport
created. 1. When TILEMODE is off (0), viewports are objects that can be moved
and resized on a layout. (MVIEW) 2. When TILEMODE is on (1), the entire
drawing area is divided into non-overlapping model viewports. See also
TILEMODE, view, and viewpoint. (VPORTS)
Glossary | 1033