wimal Posted May 14, 2018 Posted May 14, 2018 (setq lineset (ssget"C"pt1 pt2 '((0 . "LINE") (8 . "Layer1")))); lines on laye1 How can filter lines in layer1 and angle 90 Quote
Tharwat Posted May 14, 2018 Posted May 14, 2018 Hi, You need to iterate through each line entity name from the selection set then get the start and end coordinates and assign them to variable names 'p1' and 'p2' and the following codes would return T if the angle of line is equal to 90.0 Degs. (vl-some '(lambda (ang) (equal ang (* pi 0.5) 1e-4) ) (list (angle p1 p2) (angle p2 p1)) ) Good luck. Quote
wimal Posted May 14, 2018 Author Posted May 14, 2018 Hi, You need to iterate through each line entity name from the selection set then get the start and end coordinates and assign them to variable names 'p1' and 'p2' and the following codes would return T if the angle of line is equal to 90.0 Degs. (vl-some '(lambda (ang) (equal ang (* pi 0.5) 1e-4) ) (list (angle p1 p2) (angle p2 p1)) ) Good luck. Thanks Mr. Tharwat. Quote
Tharwat Posted May 14, 2018 Posted May 14, 2018 Thanks Mr. Tharwat. You're welcome anytime wimal. Quote
ronjonp Posted May 14, 2018 Posted May 14, 2018 Hi, You need to iterate through each line entity name from the selection set then get the start and end coordinates and assign them to variable names 'p1' and 'p2' and the following codes would return T if the angle of line is equal to 90.0 Degs. (vl-some '(lambda (ang) (equal ang (* pi 0.5) 1e-4) ) (list (angle p1 p2) (angle p2 p1)) ) Good luck. FWIW .. you could simplify to this: (eq (rem angle pi) (/ pi 2.)) Quote
Tharwat Posted May 14, 2018 Posted May 14, 2018 FWIW .. you could simplify to this: (eq (rem angle pi) (/ pi 2.)) Nice approach ronjonp. Quote
Lee Mac Posted May 14, 2018 Posted May 14, 2018 Not sure whether OP wants to test for +/- pi/2 or multiples of pi/2, but for the former you could use: (equal 0 (cos <angle>) 1e- And for the latter: (or (equal 0 (cos <angle>) 1e- (equal 1 (cos <angle>) 1e-) Quote
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