T-FLEX Parametric CAD. Fundamentals. 2D Design

Fundamentals. Two-Dimensional Design
Modifying Relations between Construction Lines
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If for some reason you would like to modify the existing relations between the
construction lines, this can be easily done using the
example of using this option.
option. Let’s review an
The line 1 is created at a given angle to a vertical line. Besides, it is passing through a
node at the intersection of the vertical and a horizontal line. The circle 2 was
constructed tangent to the lines 1 and 4, while the line 3 tangent to the circle 2.
Suppose, you would like to make the line 1 parallel to the vertical
line. Since other construction entities are created using the former
line as a reference, the line may not be simply deleted and then
differently created anew. The deletion of this line would require also
removing the line 3, followed by removal of the circle 2. This is
exactly the case when the option is to be used. Enter the
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command “EC: Edit Construction” and select the line 1 for
editing. This line will get highlighted along with another line and the
node used as references for this line creation.
After selecting the line, type for modifying the definition of the
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line 1 construction. Note that the system brought you into the
construction line creation command, “L: Construct Line”. Now
you can create this line as if anew. The difference from constructing a
line without using the option is that both the line being modified
and the reference line are both highlighted on the screen. Select a line
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- the reference for the line 1 to be parallel to. Then rubberband the
new line to the desired distance from the reference and fix that
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location by clicking .
Line 1 will appear in the new position, while all the rest of entities using the line as a
reference will keep their relations with the line, as, for instance, the circle 2 will
remain tangent to the line 1.
The only restriction on modifying relations between construction lines is a ban on
recursive definition, that is, the line may not reference itself. Should this occur, a
message will be displayed about recursion, and the modification will be cancelled.
With this exception, any relations between lines and circles may be modified at any
time. This functionality is especially useful on importing drawings from other
systems, such as, for example, *.DXF or *.DWG files of the AutoCAD system.
Deleting Construction Lines
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To delete a construction line, simply select the line using and call the option. If the line is not
referenced by any other drawing elements, it will be deleted. Should there be other elements defined based
on the selected line, a warning will appear about deletion of all elements related with the line.
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