T-FLEX Parametric CAD. Fundamentals. 2D Design

Fundamentals. Two-Dimensional Design
198
, , ,
This sequence defines a line orthogonal to the imaginary segment spanning two selected nodes. The line is
constructed so as to divide the segment in specified proportion. This proportion value is the parameter of the
line being created, defined in dimensionless units. For example, with the parameter equal 0, the line will be
passing through the first node, with the value 1 – through the second one, while the value 0.5 sets the line
through the midpoint between the nodes. Should the nodes change location, the line will adjust, keeping the
defined proportion. This kind of construction is used, for example, for drawing a spring with a fixed number
of coils and variable length. The distance between the coils of such a spring will vary in a fixed proportion to
the total length.
To create this kind of line, in the automenu turn on the option , move the cursor to the first node and
type , then over the second node and type . A line starts rubberbanding after the cursor orthogonal to
the segment spanning the two selected nodes. The coordinate field will be displaying the current proportion
value. Use the property window or the parameters dialog box to specify this value, or simply click , if
satisfied.
N
Lines Created from 2D Projection, 2D Fragment, or Copy
Such lines can be created in object-snapping mode, when the respective flag is set on the “Snap” tab of the
“SO: Set System Options” command. Move the cursor to a graphic line that is a part of a 2D projection,
2D fragment or a copy. The line will get pre-highlighted. Click . A construction line will be created on top
of the selected graphic line. Besides, nodes will appear by the end points of the graphic line. Meanwhile, the
system will assume the parallel line creation mode.
If the object-snapping mode is off, such lines can be created only based on 2D projection lines. To do so,
select a desired projection on a drawing using the option. The selected projection will be highlighted,
and the cursor will gain a glyph . To create a line, simply point the cursor at a line on the projection and
click .
In this case, the following options will be accessible in the command automenu:
Set Line Parameters
Cancel selection