T-FLEX Parametric CAD. Fundamentals. 2D Design

Fundamentals. Two-Dimensional Design
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The system can be set up for selecting only construction lines when defining a hatch contour in snapping
mode, and not graphic lines. This option can be set in the system customization dialog box under
“Customize|Options…”, the “Snap” tab.
A contour can be defined using the same actions as in graphic
line creation. That’s defining subsequently the lines of the
contour, each having the start and end nodes and is constrained to
construction entities – a line, a circle, an ellipse or a spline. To
define the start or end of a line of the contour, select existing
nodes (the key) or create new ones (the key or
) at two-line intersections.
As in graphic entity creation, to define an arc one needs first select a start node on the arc, and then select the
circle by typing . Otherwise, the contour will gain the segment between the two nodes instead of the arc.
When creating a contour along an arc, the arc direction can be flipped by the option .
To create a full circle contour, point at the circle and type
.
Similarly, ellipses, splines, 2D paths and functions can be
included in a contour.
In complex cases, when several nodes coincide, the end nodes of the contour lines can be specified by
selecting two construction lines whose intersection yields the desired node. This is done in object snapping
mode via the options , , , , for lines, circles, ellipses and splines respectively.
In dubious cases, when several construction lines intersect in one point, all necessary nodes can better be
created in advance by using the command “N: Construct Node”. The contour then can be defined using
the option .
To cancel the last contour line input use the key.