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    <title>tema Re: drawing a perpendicular line from a point on the line en AutoCAD Forum</title>
    <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/7758997#M919189</link>
    <description>&lt;P&gt;Take polar settings and check " relative to last segment" instead of absolute by default&amp;nbsp;&lt;/P&gt;</description>
    <pubDate>Wed, 07 Feb 2018 15:06:24 GMT</pubDate>
    <dc:creator>Anonymous</dc:creator>
    <dc:date>2018-02-07T15:06:24Z</dc:date>
    <item>
      <title>drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670460#M149961</link>
      <description>&lt;P&gt;How to&amp;nbsp;drawing a perpendicular line from a point on the line ?&lt;/P&gt;</description>
      <pubDate>Sun, 06 Nov 2016 19:16:09 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670460#M149961</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2016-11-06T19:16:09Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670561#M149967</link>
      <description>&lt;P&gt;Hi and Welcome to AutoDesk forum,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;the solution exist on turning on your ortho &lt;STRONG&gt;F8&lt;/STRONG&gt; . But if you have oblique lines first you have to make your UCS with that oblique line.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Command: &lt;STRONG&gt;UCS&lt;/STRONG&gt;&lt;BR /&gt;Current ucs name: *WORLD*&lt;BR /&gt;Specify origin of UCS or [Face/NAmed/&lt;STRONG&gt;&lt;FONT color="#FF0000"&gt;OBject&lt;/FONT&gt;/&lt;/STRONG&gt;Previous/View/World/X/Y/Z/ZAxis] &amp;lt;World&amp;gt;:&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sun, 06 Nov 2016 21:05:21 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670561#M149967</guid>
      <dc:creator>imadHabash</dc:creator>
      <dc:date>2016-11-06T21:05:21Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670607#M149971</link>
      <description>Or you can draw XLINE.</description>
      <pubDate>Sun, 06 Nov 2016 21:56:30 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670607#M149971</guid>
      <dc:creator>ВeekeeCZ</dc:creator>
      <dc:date>2016-11-06T21:56:30Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670747#M149980</link>
      <description>&lt;BLOCKQUOTE&gt;&lt;HR /&gt;@Anonymous&lt;/a&gt; wrote:&lt;BR /&gt;&lt;P&gt;How to&amp;nbsp;drawing a perpendicular line from a point on the line ?&lt;/P&gt;&lt;HR /&gt;&lt;/BLOCKQUOTE&gt;&lt;P&gt;You may try this:&lt;/P&gt;&lt;P&gt;1) Setup "Object Snap" on you drawing by using command &lt;STRONG&gt;&lt;FONT color="#ff0000"&gt;osnap&lt;/FONT&gt;&lt;/STRONG&gt;. Then tick the "Perpendicular" box in the pop up dialog.&lt;/P&gt;&lt;P&gt;2) Draw a line starting from a point then move your cursor slowly to an existing&amp;nbsp;line. click the point on the line&amp;nbsp;where you see a green mark indicating your drawing line is now perpendicular to the existing line.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;HTH&lt;/P&gt;</description>
      <pubDate>Mon, 07 Nov 2016 01:00:21 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670747#M149980</guid>
      <dc:creator>BeKirra</dc:creator>
      <dc:date>2016-11-07T01:00:21Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670929#M149993</link>
      <description>&lt;P&gt;Dear Mr.&amp;nbsp;&lt;A href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/4209705" target="_self"&gt;&lt;SPAN&gt;ah2m67&lt;/SPAN&gt;&lt;/A&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Please find the attached screen cast for your reference&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;To enable the osnap mode hold shift key and right click to enable the option&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Hope this could help you&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Regards&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Di****h.MC&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Mon, 07 Nov 2016 06:05:01 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6670929#M149993</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2016-11-07T06:05:01Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6671825#M150036</link>
      <description>&lt;BLOCKQUOTE&gt;&lt;HR /&gt;@Anonymous&lt;/a&gt; wrote:&lt;BR /&gt;
&lt;P&gt;How to&amp;nbsp;drawing a perpendicular line from a point on the line ?&lt;/P&gt;
&lt;HR /&gt;&lt;/BLOCKQUOTE&gt;
&lt;P&gt;I think most other Replies have misunderstood what you want to do.&amp;nbsp; Several are about the ordinary PERpendicular Object Snap mode, which is PERpendicular &lt;FONT color="#ff0000"&gt;&lt;EM&gt;to&lt;/EM&gt;&lt;/FONT&gt; something.&amp;nbsp; As I read it [it seems pretty clear from your wording], you want to draw perpendicular &lt;STRONG&gt;&lt;FONT color="#008000"&gt;&lt;EM&gt;from&lt;/EM&gt;&lt;/FONT&gt;&lt;/STRONG&gt; something, and &lt;EM&gt;without&lt;/EM&gt; necessarily anything else around that you can go PERpendicular &lt;EM&gt;to&lt;/EM&gt;.&amp;nbsp; You can do that &lt;EM&gt;without&lt;/EM&gt; needing to change the UCS as has been suggested, by using the "&lt;STRONG&gt;&amp;lt;&lt;/STRONG&gt;angle" format and feeding in the angle perpendicular to the object [in your request, a Line, but &lt;EM&gt;any&lt;/EM&gt; appropriate object] at the specified point.&amp;nbsp; Try this:&lt;BR /&gt;&lt;BR /&gt;&lt;/P&gt;
&lt;PRE&gt;(defun pf ()
  (strcat
    "&amp;lt;"
    (angtos
      (+
        (angle
          '(0 0 0)
          (vlax-curve-getFirstDeriv
            (setq ent (car (nentselp (getvar 'lastpoint)))); entity
            (vlax-curve-getParamAtPoint
              ent
              (osnap (getvar 'lastpoint) "_nea")
            ); ...Param
          ); ...FirstDeriv
        ); angle
        (/ pi 2); [perpendicular]
      ); +
      (getvar 'aunits) 8
    ); rtos
  ); strcat
); defun
(vl-load-com)&lt;/PRE&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Include that in your acaddoc.lsp file if you have one, or save that to a file with a &lt;STRONG&gt;.lsp&lt;/STRONG&gt; filetype ending, named whatever you want [I would call it something like &lt;STRONG&gt;PerFrom.lsp&lt;/STRONG&gt;], and APPLOAD it.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;It is written to be used after you have given whatever you're drawing a first point.&amp;nbsp; It's not restricted to drawing a Line, but can be used in drawing a Polyline, or for a Text rotation, or for the second point of a Move or Copy displacement, or for other purposes.&amp;nbsp; And it doesn't need to be a point on a &lt;EM&gt;Line&lt;/EM&gt; that you start from , but can be on &lt;EM&gt;anything&lt;/EM&gt; with linearity [Line, Polyline, Arc, Circle, Spline, Ellipse] -- anything that qualifies in the "curve" class&amp;nbsp;for (vlax-curve-...) functions.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Usage:&amp;nbsp; in the case of your request -- drawing a &lt;EM&gt;Line&lt;/EM&gt; perpendicular from another Line --&amp;nbsp;call up the Line command and give it a starting point at the place you want to draw perpendicular from on&amp;nbsp;the existing Line&amp;nbsp;[whether using NEArest or ENDpoint or MIDpoint Object Snap, or with Snap on if the existing Line was drawn that way, or whatever].&amp;nbsp; Then, when it's asking for the next point,&amp;nbsp;&lt;FONT size="3"&gt;&lt;EM&gt;type in &lt;/EM&gt;&lt;STRONG&gt;&lt;FONT color="#0000ff"&gt;(pf)&lt;/FONT&gt;&lt;/STRONG&gt;&lt;/FONT&gt; [with the parentheses], which stands for "&lt;FONT size="3"&gt;&lt;STRONG&gt;&lt;FONT color="#0000ff"&gt;p&lt;/FONT&gt;&lt;/STRONG&gt;&lt;/FONT&gt;erpendicular &lt;FONT size="3"&gt;&lt;STRONG&gt;&lt;FONT color="#0000ff"&gt;f&lt;/FONT&gt;&lt;/STRONG&gt;&lt;/FONT&gt;rom".&amp;nbsp; That will &lt;EM&gt;lock in the direction&lt;/EM&gt; for drawing the new Line to perpendicular [in either direction] from the&amp;nbsp;existing one.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Use it similarly for the other purposes mentioned -- any time it's asking for a next point when the previous point was on some object with linearity.&amp;nbsp; In drawing a Line or Polyline, it can also be used for the &lt;EM&gt;next&lt;/EM&gt; Line or Polyline&amp;nbsp;segment, and will lock the direction in to perpendicular from the latest segment.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;If that works for you, you can put it into a menu&amp;nbsp;item to pick on, if that's easier than typing it in.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;[By the way, it isn't written to account for, and I haven't tried it in,&amp;nbsp;other-than-World Coordinate Systems, but could probably be adjusted&amp;nbsp;for that,&amp;nbsp;if necessary.&amp;nbsp; It also wants the from point to be unambiguous, that is, if you pick at something like an INTersection, I don't think you can control &lt;EM&gt;which&lt;/EM&gt; intersecting object it's going to find the perpendicular direction from.]&lt;/P&gt;</description>
      <pubDate>Mon, 07 Nov 2016 14:53:54 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6671825#M150036</guid>
      <dc:creator>Kent1Cooper</dc:creator>
      <dc:date>2016-11-07T14:53:54Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6672180#M150060</link>
      <description>&lt;P&gt;Rotating the UCS is very quick and easy. &amp;nbsp;UCS, OB, (pick line). &amp;nbsp;Draw with ortho on. &amp;nbsp;UCS, W to get back. &amp;nbsp;This can be easily automated to UO for object and UW for World and it is handy for lots of other scenarios as well.&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Mon, 07 Nov 2016 16:33:27 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6672180#M150060</guid>
      <dc:creator>GrantsPirate</dc:creator>
      <dc:date>2016-11-07T16:33:27Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6672247#M150062</link>
      <description>&lt;P&gt;A two command drafting solution.&lt;/P&gt;&lt;P&gt;Place new line using deferred Perpendicular object snap. Move new line to desired location.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;OL&gt;&lt;LI&gt;Invoke the LINE command&lt;OL&gt;&lt;LI&gt;Specify the PERpendicular object snap (Shift+right-click--&amp;gt;Perpendicular).&lt;/LI&gt;&lt;LI&gt;Touch existing line (See Deferred Perpendicular cursor badge.)&lt;/LI&gt;&lt;LI&gt;Click to begin new line.&lt;/LI&gt;&lt;LI&gt;Specify the&amp;nbsp;NONe object snap (Shift+right-click--&amp;gt;None).&lt;/LI&gt;&lt;LI&gt;Click endpoint of new line. (This line will be perpendicular to existing line.)&lt;/LI&gt;&lt;/OL&gt;&lt;/LI&gt;&lt;LI&gt;MOVE new line to desired location.&lt;/LI&gt;&lt;/OL&gt;&lt;P&gt;3. If necessary use LENGTHEN, TRIM, EXTEND or FILLET to adjust length of new line.&lt;/P&gt;</description>
      <pubDate>Mon, 07 Nov 2016 16:58:16 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6672247#M150062</guid>
      <dc:creator>wwork</dc:creator>
      <dc:date>2016-11-07T16:58:16Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6672334#M150065</link>
      <description>&lt;BLOCKQUOTE&gt;&lt;HR /&gt;&lt;a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/511655"&gt;@GrantsPirate&lt;/a&gt; wrote:&lt;BR /&gt;
&lt;P&gt;Rotating the UCS is very quick and easy. &amp;nbsp;UCS, OB, (pick line). &amp;nbsp;Draw with ortho on.&amp;nbsp;&amp;nbsp;....&amp;nbsp;&lt;/P&gt;
&lt;HR /&gt;&lt;/BLOCKQUOTE&gt;
&lt;P&gt;That will serve for the specific situation in the OP's question [perpendicular from a Line], as well as&amp;nbsp;to draw perpendicular from&amp;nbsp;a Polyline line segment&amp;nbsp;or a Circle at the given point.&amp;nbsp; But not for an Arc, Polyline arc segment, Ellipse, or Spline, any of which (pf)&amp;nbsp;can handle.&amp;nbsp; Also, in addition to not needing to play with the UCS,&amp;nbsp;(pf)&amp;nbsp;is&amp;nbsp;totally unaffected by&amp;nbsp;whether or not Ortho is&amp;nbsp;on.&amp;nbsp; And the UCS&amp;nbsp;approach can't be used&amp;nbsp;if you want to use something like this &lt;EM&gt;in mid-command&lt;/EM&gt; [e.g. &lt;EM&gt;within&lt;/EM&gt; a Line or Move or Copy or whatever command], because you'd have to get out of&amp;nbsp;the command&amp;nbsp;to change the UCS.&lt;/P&gt;</description>
      <pubDate>Mon, 07 Nov 2016 17:27:44 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6672334#M150065</guid>
      <dc:creator>Kent1Cooper</dc:creator>
      <dc:date>2016-11-07T17:27:44Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6673255#M150141</link>
      <description>&lt;P&gt;Oops! Kent is right and I didn't read the post carefully…&lt;/P&gt;&lt;P&gt;Apart from Kent and Imad's solutions, the command ".MoCoRo" from Express Tools also works as the 1st point on the existing line was specified.&lt;/P&gt;</description>
      <pubDate>Tue, 08 Nov 2016 00:51:32 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6673255#M150141</guid>
      <dc:creator>BeKirra</dc:creator>
      <dc:date>2016-11-08T00:51:32Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6673919#M150160</link>
      <description>&lt;P&gt;A,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Welcome to the Autodesk Forum.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&lt;FONT color="#993300"&gt;&lt;EM&gt;&lt;STRONG&gt;"...perpendicular line from a point on the line..."&lt;/STRONG&gt;&lt;/EM&gt;&lt;/FONT&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;The big question: are you wanting this in 2D or 3D? If 2D, then Object Snap Tracking will make it happen. Hover over the first line before making the second point of your new perpendicular line:&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-center" image-alt="OST1.png" style="width: 705px;"&gt;&lt;img src="https://forums.autodesk.com/t5/image/serverpage/image-id/290421i1F23D49948934A3A/image-size/large?v=v2&amp;amp;px=999" role="button" title="OST1.png" alt="OST1.png" /&gt;&lt;/span&gt;﻿&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;

&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Dave&lt;/P&gt;</description>
      <pubDate>Tue, 08 Nov 2016 11:07:15 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/6673919#M150160</guid>
      <dc:creator>Pointdump</dc:creator>
      <dc:date>2016-11-08T11:07:15Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/7758997#M919189</link>
      <description>&lt;P&gt;Take polar settings and check " relative to last segment" instead of absolute by default&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Wed, 07 Feb 2018 15:06:24 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/7758997#M919189</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2018-02-07T15:06:24Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/8949434#M988600</link>
      <description>&lt;P&gt;Thanks!&lt;/P&gt;</description>
      <pubDate>Mon, 05 Aug 2019 19:33:57 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/8949434#M988600</guid>
      <dc:creator>Shaun-CityofKelso</dc:creator>
      <dc:date>2019-08-05T19:33:57Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/9622928#M1025067</link>
      <description>&lt;P&gt;Thank you so so much! Works like a charm.&lt;/P&gt;</description>
      <pubDate>Tue, 07 Jul 2020 21:00:32 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/9622928#M1025067</guid>
      <dc:creator>Shaun-CityofKelso</dc:creator>
      <dc:date>2020-07-07T21:00:32Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/9972495#M1039626</link>
      <description>&lt;P&gt;&lt;EM&gt;&lt;a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/511655"&gt;@GrantsPirate&lt;/a&gt;&amp;nbsp;Thank you. Very useful! Special for a beginner &lt;img class="lia-deferred-image lia-image-emoji" src="https://forums.autodesk.com/html/@38DF24EF580240D512020314976B5FC8/emoticons/1f642.png" alt=":cara_con_una_leve_sonrisa:" title=":cara_con_una_leve_sonrisa:" /&gt;&lt;/EM&gt;&lt;/P&gt;&lt;P&gt;&lt;EM&gt;Automate? I like that. It is like 'newobj = obj.method()' ?&lt;/EM&gt;&lt;/P&gt;&lt;P&gt;&lt;EM&gt;Cheers.&lt;/EM&gt;&lt;/P&gt;</description>
      <pubDate>Fri, 01 Jan 2021 18:00:35 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/9972495#M1039626</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2021-01-01T18:00:35Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/12849927#M1133320</link>
      <description>&lt;BLOCKQUOTE&gt;&lt;HR /&gt;&lt;a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/69526"&gt;@Kent1Cooper&lt;/a&gt;&amp;nbsp;wrote:&lt;BR /&gt;
&lt;BLOCKQUOTE&gt;&lt;HR /&gt;@Anonymous&lt;/a&gt; wrote:&lt;BR /&gt;
&lt;P&gt;How to&amp;nbsp;drawing a perpendicular line from a point on the line ?&lt;/P&gt;
&lt;HR /&gt;&lt;/BLOCKQUOTE&gt;
&lt;P&gt;....&amp;nbsp; You can do that &lt;EM&gt;without&lt;/EM&gt; needing to change the UCS as has been suggested, by using the "&lt;STRONG&gt;&amp;lt;&lt;/STRONG&gt;angle" format and feeding in the angle perpendicular to the object ...&amp;nbsp;at the specified point.&amp;nbsp; Try this:&lt;BR /&gt;&lt;SPAN&gt;.... save that to a file with a &lt;/SPAN&gt;&lt;STRONG style="font-family: inherit;"&gt;.lsp&lt;/STRONG&gt;&lt;SPAN&gt; filetype ending, named whatever you want [I would call it something like &lt;/SPAN&gt;&lt;STRONG style="font-family: inherit;"&gt;PerFrom.lsp&lt;/STRONG&gt;&lt;SPAN&gt;]....&lt;/SPAN&gt;&lt;/P&gt;
&lt;HR /&gt;&lt;/BLOCKQUOTE&gt;
&lt;P&gt;I found that it doesn't work right when what you are trying to go Perpendicular From is a "heavy" Polyline, whether 2D or 3D.&amp;nbsp; Attached is an update that corrects that.&lt;/P&gt;</description>
      <pubDate>Wed, 19 Jun 2024 17:54:12 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/12849927#M1133320</guid>
      <dc:creator>Kent1Cooper</dc:creator>
      <dc:date>2024-06-19T17:54:12Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13159479#M1142305</link>
      <description>&lt;P&gt;After coping and pasting your code to notepad, and saving it as PerFrom.lsp, then "Appload" this routine in autocad plant 3d, to type "pf", it reflects&lt;/P&gt;&lt;P&gt;Command: PF&lt;BR /&gt;; error: unable to get ObjectID: nil&lt;/P&gt;&lt;P&gt;Any help is welcomed.&lt;/P&gt;</description>
      <pubDate>Tue, 19 Nov 2024 08:30:24 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13159479#M1142305</guid>
      <dc:creator>Yuzheng19711219BQQFP</dc:creator>
      <dc:date>2024-11-19T08:30:24Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13159847#M1142312</link>
      <description>&lt;P&gt;It's not a &lt;EM&gt;command&lt;/EM&gt; to be started at the Command: prompt, but a &lt;EM&gt;function&lt;/EM&gt; that you call within another command.&amp;nbsp; For example, start a LINE command, pick a point on some object, then type in&lt;FONT face="courier new,courier"&gt;&lt;STRONG&gt; (pf)&lt;/STRONG&gt; &lt;/FONT&gt;&lt;EM&gt;including the parentheses&lt;/EM&gt;.&amp;nbsp; See the description at its first appearance [Message 6].&amp;nbsp; But don't paste code from there.&amp;nbsp; Use the file attached to the Message just before yours [16].&lt;/P&gt;</description>
      <pubDate>Tue, 19 Nov 2024 13:27:04 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13159847#M1142312</guid>
      <dc:creator>Kent1Cooper</dc:creator>
      <dc:date>2024-11-19T13:27:04Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13159862#M1142313</link>
      <description>&lt;P&gt;... how about to make it a command c:pf, then it could run with 'pf.&lt;/P&gt;</description>
      <pubDate>Tue, 19 Nov 2024 11:40:12 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13159862#M1142313</guid>
      <dc:creator>ВeekeeCZ</dc:creator>
      <dc:date>2024-11-19T11:40:12Z</dc:date>
    </item>
    <item>
      <title>Re: drawing a perpendicular line from a point on the line</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13160077#M1142318</link>
      <description>&lt;BLOCKQUOTE&gt;&lt;HR /&gt;&lt;a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/1779365"&gt;@ВeekeeCZ&lt;/a&gt;&amp;nbsp;wrote:&lt;BR /&gt;
&lt;P&gt;... how about to make it a command c:pf, then it could run with 'pf.&lt;/P&gt;
&lt;HR /&gt;&lt;/BLOCKQUOTE&gt;
&lt;P&gt;And what would you expect to happen if you typed in the command name PF without being in a command, and without a reference point?&amp;nbsp; If someone wanted a &lt;EM&gt;single-purpose&lt;/EM&gt; command, for example one that would &lt;EM&gt;always and only start a LINE command&lt;/EM&gt; perpendicular from something, that could be done.&amp;nbsp; But&lt;FONT face="courier new,courier"&gt;&lt;STRONG&gt; (pf)&lt;/STRONG&gt; &lt;/FONT&gt;works for many other things, like MOVE or COPY displacements, the second point in a 2P Circle, the next segment in a Polyline, etc.&lt;/P&gt;</description>
      <pubDate>Tue, 19 Nov 2024 13:25:40 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/drawing-a-perpendicular-line-from-a-point-on-the-line/m-p/13160077#M1142318</guid>
      <dc:creator>Kent1Cooper</dc:creator>
      <dc:date>2024-11-19T13:25:40Z</dc:date>
    </item>
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