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; * ARC LENGTH; * Returns the length of an arc ; * From JefferyPSanders.com (defun getArc(en) (command "lengthen" en "") (getvar "perimeter"))
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(defun getlength (/ en) (setq en (car (entsel))) (vlax-curve-getDistAtParam en (vlax-curve-getEndParam en)))
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顶梁支柱
(setq obj (vlax-Ename->Vla-Object (car (entsel)))) (princ (vla-get-arclength obj)) ; this is arc; (princ (vla-get-length obj)) ; this is pline and a line; (princ (vla-get-Circumference obj)) ; this is a circle
(vl-load-com)(Defun getArc (en) (vlax-curve-getDistAtParam en (vlax-curve-getEndParam en)))
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