**Command: **conLineSeg

**Description:**
Constructs a line segment and shows the line parameters. The command refers
to the fundamental line segment processor that is used whenever a line
segment is to be constructed. The supported construction methods are
*Pick:* The line segment is constructed by picking an
existing line segment.

*2 Points:* The line segment is constructed from two
points P1 and
P2.

*Point and vector:* The line segment is constructed from a
point P and a
vector v.

*Point and circle:* The line segment is constructed from a
point P
tangential to a circle
c. One of the up to two possible line
segments must be identified by picking.

*2 circles:* The line segment is constructed tangential to
two circles c1
and c2. One of the up to four possible line
segments must be identified by picking.