Offset Based on Arc Length (Tip #2148) from Derek Beals shows how you can use AutoLISP to augment existing AutoCAD commands. In Derek's case, he needed the arc length of an existing arc to feed the AutoCAD Offset command. Load the AutoLISP file then type AO at AutoCAD Command line, select an existing arc object and the Offset command starts with the arc length already supplied as the offset value. The AutoLISP source contains other very useful functions for arc data manipulation and is worth a peek to see if there is something you might need to compliment your own library. |