Tangent Lines

The TANLINE command can be used to draw a tangent line between any two ARC or CIRC elements. Provided that the current element is a STRA, the syntax to create a tangent line would be, for example:

TANLINE @ @

Figure 20:15 below shows various examples of the use of the tangent line facility. Notice how (right-most illustration) the tangent line may lie on the complement of an ARC.

Figure 20:15. Use of the TANLINE command to give a Tangent Line