**LTAN****LTAN**, `NL1`

, `P3`

, `XV3`

, `YV3`

, `ZV3`

**Generates a line at the end of, and tangent to, an existing line.**

`NL1`

Number of the line the generated line is tangent to. If negative,
assume `P1`

(see below), instead of `P2`

, is the second keypoint of line `NL1`

.
If `NL1`

= P, graphical picking is enabled and all
remaining command fields are ignored (valid only in the GUI).

`P3`

Keypoint at which generated line must end.

The following fields are used only if a specified slope on the end of
the new line is desired, otherwise a zero curvature end slope will be automatically
calculated. To specify the end slope, use the following fields to define
a "slope vector" that has its tail at the origin and its head at the point `XV`

, `YV`

, `ZV`

in the active coordinate system [**CSYS**].
The corresponding end slope of the line will then be parallel to this "slope
vector."

`XV3`

, `YV3`

, `ZV3`

Location (in the active coordinate system) of the head of
the "slope vector" corresponding to the slope at the `P3`

end
of the line. The tail of the vector is at the coordinate system origin.

## Notes

Generates a line (`P2`

-`P3`

)
tangent at end point (`P2`

) of line `NL1`

(`P1`

-`P2`

).