cat3appr Posted March 9, 2020 Share Posted March 9, 2020 (edited) Hello, I have a plot of 2 navigations , red and blue, of 2 ships that are converging and diverging. Most of the time they are almost parallel. Is there a way to calculate the maximum drift along the 2 lines? Even or also in QGIS NOTE - the command must take into account the drift over a certain range only, say on a 100m range, or else , as there are different passages of the lines, the command would see also the far most drift from lines too far apart...please see the photos many thanks! Edited March 9, 2020 by cat3appr Quote Link to comment Share on other sites More sharing options...
BIGAL Posted March 9, 2020 Share Posted March 9, 2020 (edited) For a lisp answer its pretty straight forward use the Vl command Getclosestpointto you just walk along one of the plines and check the 90deg distance to the other pline. You use the VL Getpointatdist to walk along say at incremments, if the pline is a collection of points then you can use the Pline vertices. This has been asked before here thinking what search phrase to use. distance between 2 plines ? (setq ptclose (vlax-curve-getclosestpointto obj2 pt)) (setq dist (distance ptclose pt)) Edited March 9, 2020 by BIGAL Quote Link to comment Share on other sites More sharing options...
cat3appr Posted March 10, 2020 Author Share Posted March 10, 2020 No I haven't found anything similar, please note, as I explained, it cannot be something that just keeps into account the distance between 2 lines, please see the screenshots... there are multiple passages of the lines same DWG, look at the first screenshot and you will understand why the lisp you suggested won't work. thank you Quote Link to comment Share on other sites More sharing options...
BIGAL Posted March 10, 2020 Share Posted March 10, 2020 You wanted the distance between 2 plines that's what I offered. With no dwg how are we meant to look further. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.