Nina Posted February 24, 2010 Share Posted February 24, 2010 How do I draw perpendicular from a line or object at a specific point? I know by holding shift and osnap perpendicular I can draw the line but I can not osnap to the exact point! help. Quote Link to comment Share on other sites More sharing options...
lpseifert Posted February 24, 2010 Share Posted February 24, 2010 One way to draw a line perpendicular from a line... Ortho on UCS > E (pick line to align UCS) Draw the line UCS > P (returns the UCS to previous) You know that using your method of Deferred Perpendicular, you can rt-clk to get osnaps. Quote Link to comment Share on other sites More sharing options...
alanjt Posted February 24, 2010 Share Posted February 24, 2010 I wrote this for accomplishing that very thing. Mine will allow you to the closest point (based on your selection), closest end point or picked point. http://www.cadtutor.net/forum/showpost.php?p=305119&postcount=53 You'll need a few subroutines (stated in the info), you can find them here.. http://www.cadtutor.net/forum/showthread.php?t=40344 Quote Link to comment Share on other sites More sharing options...
eldon Posted February 24, 2010 Share Posted February 24, 2010 I would just draw the line with Polar tracking enabled. Just make sure that tracking is Relative to last segment, and off you go! Quote Link to comment Share on other sites More sharing options...
Nina Posted February 24, 2010 Author Share Posted February 24, 2010 Thanks, i will try it. Quote Link to comment Share on other sites More sharing options...
BearDyugin Posted February 24, 2010 Share Posted February 24, 2010 Well, while did already have written... Well as has made that now look: Quote Link to comment Share on other sites More sharing options...
alanjt Posted February 24, 2010 Share Posted February 24, 2010 Here's an example of how mine works... Quote Link to comment Share on other sites More sharing options...
Nina Posted February 24, 2010 Author Share Posted February 24, 2010 I copied the lisp program u posted and loaded in cad, the command I used was : "per" but no louck, can u give me easy step by step direction pleeeeease? Here's an example of how mine works... [ATTACH]17638[/ATTACH] Quote Link to comment Share on other sites More sharing options...
alanjt Posted February 24, 2010 Share Posted February 24, 2010 I copied the lisp program u posted and loaded in cad, the command I used was : "per" but no louck, can u give me easy step by step direction pleeeeease? Make sure you copied everything. You'll have to do a little searching to find all the subroutines (second link). Open Notepad, copy/paste everything in, save as Per.lsp and load into AutoCAD with Appload. I use it almost everyday, so I can vouch that it works. Quote Link to comment Share on other sites More sharing options...
rkmcswain Posted February 24, 2010 Share Posted February 24, 2010 Why not just use the PERP object snap? Quote Link to comment Share on other sites More sharing options...
alanjt Posted February 24, 2010 Share Posted February 24, 2010 Why not just use the PERP object snap? Because you can't specify a point on the object you are projecting a perpendicular line from. I used to just do that, then move my newly drawn line to where I wanted it on the selected line. Am I incorrect? Quote Link to comment Share on other sites More sharing options...
rkmcswain Posted February 24, 2010 Share Posted February 24, 2010 Because you can't specify a point on the object you are projecting a perpendicular line from. Maybe I am misunderstanding the problem...? Here is what I am talking about. Quote Link to comment Share on other sites More sharing options...
Nina Posted February 24, 2010 Author Share Posted February 24, 2010 thank u so much. Make sure you copied everything. You'll have to do a little searching to find all the subroutines (second link). Open Notepad, copy/paste everything in, save as Per.lsp and load into AutoCAD with Appload. I use it almost everyday, so I can vouch that it works. Quote Link to comment Share on other sites More sharing options...
alanjt Posted February 24, 2010 Share Posted February 24, 2010 Maybe I am misunderstanding the problem...? Here is what I am talking about. [ATTACH]17654[/ATTACH] Right, but you can't specify an actual point on the line. That's why I put my PER command together. Quote Link to comment Share on other sites More sharing options...
alanjt Posted February 24, 2010 Share Posted February 24, 2010 thank u so much. Am I to assume you got it working? Quote Link to comment Share on other sites More sharing options...
rkmcswain Posted February 24, 2010 Share Posted February 24, 2010 Right, but you can't specify an actual point on the line. That's why I put my PER command together. So I was misunderstood.... I overlooked the "at a specific point" part of the original request. My bad. Ok, so why not just use polar tracking like this? BTW: Dynamic input was only enabled so that you could see what I was doing in such a small window. I would never have that turned on while doing real work. Quote Link to comment Share on other sites More sharing options...
Nina Posted February 24, 2010 Author Share Posted February 24, 2010 i have to try it tomorrow at work and am sure it will work. Quote Link to comment Share on other sites More sharing options...
rkent Posted February 24, 2010 Share Posted February 24, 2010 RK, I think that only works if drawing the perp line immediately after drawing the other one. I use UO, short for UCS, Object to align the ucs to the line, draw what I need, then UW, short for UCS, World. Quote Link to comment Share on other sites More sharing options...
rkmcswain Posted February 24, 2010 Share Posted February 24, 2010 RK, I think that only works if drawing the perp line immediately after drawing the other one. It seems to work at any time. Quote Link to comment Share on other sites More sharing options...
alanjt Posted February 24, 2010 Share Posted February 24, 2010 It seems to work at any time. [ATTACH]17659[/ATTACH] I stand corrected. Quote Link to comment Share on other sites More sharing options...
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