kasra Posted April 26, 2010 Share Posted April 26, 2010 Hi. By which combination of functions, I can get coordination of a point at desired distace from the start point of a polyline? Quote Link to comment Share on other sites More sharing options...
jammie Posted April 26, 2010 Share Posted April 26, 2010 Hi Kasra A suitable function would be (vlax-curve-getPointAtDist <ename> <dist>) where is the enity name length along the curve vlax-curve-getPointAtDist will return nil if the specified length does not lie on the curve Just a quick sample (defun c:test () (if (and (setq ename (car (entsel))) (setq chainage (getreal "\nChainage")) (setq basepoint (vlax-curve-getPointAtDist ename chainage))) (entmake (list (cons 0 "Point")(cons 10 basepoint))) ) ) Quote Link to comment Share on other sites More sharing options...
kasra Posted April 26, 2010 Author Share Posted April 26, 2010 Hi Dear Jammie. I'm so thankful for your help. I have a question: How it can identify the start point of polyline? Quote Link to comment Share on other sites More sharing options...
jammie Posted April 26, 2010 Share Posted April 26, 2010 Hi Kasra Your welcome How it can identify the start point of polyline? Would you like to insert a point at the start of the curve? If this is the case the distance at the startpoint would be 0 Quote Link to comment Share on other sites More sharing options...
kasra Posted April 26, 2010 Author Share Posted April 26, 2010 ok. I appreciate with you for helping me. Quote Link to comment Share on other sites More sharing options...
Lee Mac Posted April 26, 2010 Share Posted April 26, 2010 Kasra, Search the VLIDE help for vlax-curve* Also check out the AutoLISP Developers Guide > Appendixes > AutoLISP Function Synopsis > Visual LISP Extensions to AutoLISP > Curve Measurement Functions section in the VLIDE help. Lee Quote Link to comment Share on other sites More sharing options...
tony bombata Posted April 26, 2010 Share Posted April 26, 2010 ^^^^^ sincere apologies for going offtopic lee, is the swamp offline? i can't access the webpage Quote Link to comment Share on other sites More sharing options...
Lee Mac Posted April 26, 2010 Share Posted April 26, 2010 ^^^^^sincere apologies for going offtopic lee, is the swamp offline? i can't access the webpage You are actually the third person to ask me whether it be by PM, email etc... I should think it would be maintenance, but yes, it has been down certainly this afternoon. I'm sure Mark will get it back up soon - people need their daily Swamp fix. Quote Link to comment Share on other sites More sharing options...
alanjt Posted April 26, 2010 Share Posted April 26, 2010 You are actually the third person to ask me whether it be by PM, email etc... I should think it would be maintenance, but yes, it has been down certainly this afternoon. I'm sure Mark will get it back up soon - people need their daily Swamp fix. Maybe it's in honor of Alan (not me) going on vacation. Quote Link to comment Share on other sites More sharing options...
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