AutoCAD Visual LISP / AutoLISP :: Convert Ellipse Segment Into Spline Or Polyline
May 3, 2012
Our customer send us drawing with ellipse segments into.
With Autocad 2008 I bought a plug-in call SplineConvert that did the job perfectly but not compatible with 2013.
Is there any plugin that could replace that tool ?
Is there any standard ACAD command that could easily do this Job ?
I need a way to make 2 or 3 times per week this converting on all ellipses of large and detail 2D drawings so no time to offset in and out all those .
I try also DXFOUT in R12 but all the spline are being converted into 3d polyline making a huge files that froze my PC.
I also try FLATTEN but did not see how it work , the ellipse stay an ellipse.
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Sep 21, 2013
Due to modeling purposes, I need to convert a 3D polyline to a spline. What I have been doing is:
- change polyline fit/smooth to cubic from properties
- convert polyline to spline by typing spline -> object
- method -> fit from properties
You can see the original 3D polyline (green) and the resulting spline (magenta) in the attached drawing.When I zoom in and measure the distance between the two entities at different points along them, at some points the perpendicular distance exceeds 5 millimeters, and I want to ensure the deviation remains under 1 millimeter or even less.
I know I can change the knot parameterization of the spline, and this does work at some locations, but the difference increases at others.Why is there a 5.6 mm difference between the spline fit point and 3D polyline vertex, as measure in the attached drawing?
Now, I can go and manually stretch the fit point to coincide with the vertex. Also, I can add fit points between existing ones to drag the spline closer to the original 3D poly.
However, some of my polys are really long, and it is very time-consuming to do this manually while measuring points along the entities to make sure the distance stays small enough.
how to automate this process? For example a lisp that would maybe take the original vertex points, add say maybe 3 (not too many) new ones between them, and then generate a spline while making sure the deviation is less than the set value of 1mm? I am using AutoCAD 2013.
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Dec 18, 2011
I have to intersect polylines "POLYLINE" and "LWPOLINE" with a line and get all the angles of all segments of the polyline that are intersected.
To do this I used a loop that monitors all the vertices of each polyline to find the two vertices of the polyline segment that intersects the line. Unfortunately, these polylines have thousands of vertices and the processing done in this way takes too long.
With the vlax-curve-getClosestPointTo I could very quickly find the vertex of the polyline closest to that intersected with the line, but I need to find the other vertex of the polyline segment to determine the angle of this.
Another question: is there a quick function that returns the exact point of intersection of two curves (e.g. A line and a polyline, or a line and a circle?
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Mar 19, 2013
I am writing a routine that will place a piece of text at a specified point along a polyline. My problem is to determine the angle for the text. It needs to be the same as the segment of the polyline that it falls on. Just can't get my head around how to get that angle?
I can get a list of the vertex point of the polyline, but how do I determine the segment the point falls on?
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Feb 6, 2006
Have Lisp to place aligned dimensions on each segment of a polyline?
I would use it for reinforcing bar detailing.
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May 3, 2012
Our customer send us drawing with ellipse into.With Autocad 2008 I bought a plug-in call SplineConvert that did the job perfectly but not compatible with 2013.
Is there any plugin that could replace that tool ?
Is there any standard ACAD command that could easily do this Job ?
I need a way to make 2 or 3 times per week this converting on all ellipses of large and detail 2D drawings so no time to offset in and out all those .
I try also DXFOUT in R12 but all the spline are being converted into 3d polyline making a huge files that froze my PC.
I also try FLATTEN but did not see how it work , the ellipse stay an ellipse.
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Sep 21, 2004
Code to convert a spline or read its points so I can create a curved leader (with arrowhead) reasonably close ?
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Feb 5, 2013
I have a data structure called LayerList in the format [LIST "LayerName" "Linetype" Thickness Color]I then use the following piece of code to go through the structure selecting polylines and converting all polylines on a given layer to the correct thickness
(foreach layr layerlist
(setq player (car layr))
(if (setq ss (ssget "x" '((0 . "*polyLINE") (8 . player ) )))
(command "pedit" "m" ss "" "w" 0.15 "")
(princ "
No polylines exist!")
)
)
However all i keep getting is Bad SSGET list value at the command line,
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Oct 9, 2013
I'm trying to look for a LISP command where i will create a closed polyline with 4 sides in different angles. then convert it to region.
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May 11, 2012
I've managed to retrieve the important points of a leader with the following
(setq edata (entget (entlast)))
(setq leader? (cdr (assoc 0 edata)))
(cond
((= leader? "LEADER")())
(T(setq edata (cdr (entget (car (entsel "
Pick a leader: "))))))
)
[code].....
What I'd like to do is add a horizontal segment of a known length to the leader, obviously based on the last point. I have to assume that the user is in the appropriate UCS for this, but I can trouble shoot for that later.
subst old list iwth a new list and apply it to the entity somehow?
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Jun 7, 2012
I would like to take all the vertices out of a multiple-vertices polyline so that it reduces to just its start and end points, can this be done?
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Oct 14, 2013
I'm trying to get a lisp routine to flatten out ellipses, I have changing the z-coordinate to equal world ucs z ok , but can't seem to get it to re-align the normal axis zo it matches the world ucs axis.The code works fine for a circle and sould not be any different for an ellipse, yet it falls over at the (vla-put-normal) statement for the ellipse.Any clues, or is it a failure in implementation for ActiveX?
(defun FL_normal (mspace index / changeobj currNormal newNormal)
(setq changeobj (vla-item mspace index))
(setq newNormal (vlax-3d-point 0 0 1))
(setq currNormal (vlax-variant-value (vla-get-Normal changeObj)))
(alert
[code]...
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Mar 18, 2008
I need to draw an ellipse at a specific point on a drawing.
i can calc the major and minor and i have a polar point of where it should be drawn.
i just need the code to draw the ellipse.
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Apr 4, 2012
I am working on a little lisp routine to draw splines, but can't get it working. The basic idea is that i first select a set of points that i can feed to my spline command.
(defun c:test2 () (setq pt (getpoint "
define point:")) (setq ptlist nil) (while (not (equal pt nil)) (setq ptlist (cons pt ptlist)) (setq pt (getpoint "
define point:")) ) )
Now i need to draw a spline based on these points. My plan whas to simply use the acad command itself. But this option didn't work.
(command "spline" ptlist "")
Then i tried using the vla-addspline command. But i can't even get this one working .
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Aug 8, 2013
Let's say I have a 3D polyline, which I turn into a spline. I then want to determine how closely the original polyline and spline follow each other. How I can check this programmatically? The concern is to find the maximum deviation and its location.
Howto be able to run the check on other types of objects as well: arc, polylines etc.
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Apr 26, 2013
this is a Offset cutting plane line I want it to be all polylines but I can't get the ename of the end points of the polylines dose anyony know how
(defun ccp (/ pt2)
(SETVAR "CMDECHO" 0)
(setvar "angbase" 0)
(setvar "angdir" 0)
(command "polarang" 1)
(setq pt1 (getpoint "
[Code]....
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May 21, 2012
Is it possible to determine the sum of the lengths of all of the polylines on a certain layer? I'm trying to determine the total length of joint sealant on a building's exterior.
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Aug 23, 2012
I am using acad 2010. I have a contour generator that uses 3d polylines to make contours. I get depressions or tops where I don't want them. I need a lisp routine that will allow me to adjust the z value only on any 3d polyline. I need to raise or lower the z value at any vertex and repeat if necessary. I don't need to prompt the user- I am the user.
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Jul 19, 2013
I create contour line in TOPOGRAPH program, and I import these polylines to AUTOCAD. I have to set elevation for each polyline manually, and I waste a lot of time doing that.
So looking for lisp doing that automatically. I mean, invoke the command, set the first elevation and them select the polylines.
e.g. The first elevation is 530. The next polyline that I select is 531 and so on.
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Feb 17, 2009
For the sake of editing, I sometimes make LWPOLYLINES and convert them to regions so that I can union and subtract and intersect, etc.
then sometimes, like now, I want to work with them like as LWPOLYLINES again.
is there some command I don't know, or some routine or shall I make one?
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Mar 7, 2012
is there a way to draw a polyline and have autocad clip everything outside of that polyline and discard it so that i end up with a smaller drawing. only the information in that polyline, nothing outside of the polyline
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Feb 5, 2013
I've been searching on and off all morning for a lisp routine, without any luck. I'm trying to draw a pline with a pre determined width (5") and be able to draw unlimited line segments then automatically fillet with a pre determined radius (5").
I wrote this generic macro: ^C^CPLINEWID;5;PL;\\;FILLET;R;5;F;P;LAST; to save SOME time but I want unlimited line segments. Can this be modified or would a lisp be the better route to go?
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May 4, 2011
Code below, for labeling polyline areas
It works great for what i want, with 2 exceptions the text is to small and the label is not inserted at the centroid of the polyline, rather it is placed outside the polyline.
i am able to increase the text style by adjusting the dimscale before i run the command, however it would be good if the program could do that automatically, i would like the text to be about 300 units high, and for the label to be placed at the centroid of the polyline
(defun C:AT ( / ss i)
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Aug 1, 2012
do you know command or lisp that will do new pollyline between two polyline on 1/3 or 1/4 space between them.
I need sommething that would be faster,know is use measure on pollilines then i draw between horizontall polylines on verteks or point new pollyline and then divide it on 4 or 3 parts.
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Apr 17, 2012
i.e. one that would apply best fit lines and arcs to a segmented polyline?
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Apr 13, 2012
I´m looking for opportunities to can modify a polyline with 4 or more segments in a polyline with arc. I think it´s possible to pick start and end segment first and than all straight segments to will be in arc segments.
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Jul 29, 2013
Creating a ribbon for Partial Customization files in the CUI, and I am trying to setup some buttons for existing polylines for example underground electric and overhead electric. When writing the macro what are some ideas for creating a polyline with the proper linetype for that particular object rather than changing the layer in layer properties dialogue.
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May 8, 2013
I have a closed polyline that i can add the area to via a field in mtext using the options under area. I would like the area to always be rounded down to the nearest square meter. Is the a way to do this via the acfields.fdc file?
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Oct 11, 2011
I have to go through quite a few drawings and extract the attribute vales of the whole drawing and then a subset contained within a couple of polylines.
The whole drawing is Ok as I can use at out or the data extraction, but its the ones contained within a polyline. How do I do that?
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Nov 13, 2013
i need a vlisp program to draw polyline between two blocks.
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Jan 4, 2013
I have run into a little trouble in trying to figure out how to create a arc polyline with entmake. I've put together the following and it works great with command "pline". I just want to know how to do it with entmake.
(defun C:22 ()
(setq P1 (getpoint "
Specify first point: ")
P2 (getpoint P1 "
Specify next point: "))
[code].......
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