AutoCAD Visual LISP / AutoLISP :: Return Coordinates Of LWPOLYLINE
Oct 21, 2013
I recently wrote a lisp routine that was supposed to get the 4 coordinates of a rectangle (LWPolyline). It worked fine in *MY* tests. But when someone else ran it, the routine operated as though the order of the points had been rearranged.
How can I get the points AND the order in which they belong?
Here's a sketch to show you what I mean. As part of my troubleshooting, I had a lisp routine draw a new pline using the points gathered by my first routine. The result of that on the left. On the right is the result of that when someone else runs the two routines.
Here's the code I used to get the points.
(defun getplinepointlist(ename)
(setq ent(entget ename))
(setq ptlist (list))
(while (setq pt(cdr(assoc 10 ent)))
[code].......
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May 15, 2013
The following gives me the first folder string, with no back-slashes, that the drawing exists in.
(setq FirstFolder
((lambda (/ tmpDir tmpPos)
(substr
(setq tmpDir (getvar "dwgprefix"))
(+ 2 (setq tmpPos (vl-string-search "\" tmpDir)))
(- (vl-string-search "\" tmpDir (1+ tmpPos)) (1+ tmpPos))))))
Is there a way to find the name of the second folder?
Is there a way to find the name of the third folder?
The string length of the characters for each of the first, second, third (and so on) folders are different, which means I can't count character using the "substr" function.
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Jun 27, 2013
Trying to diable the spacebar = (return last command) function!
commandlinehide does te job in the working interface, but a space in scriptmode (in the filename e.g.) still repeats last command!
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Aug 5, 2013
The lisp routine displays point values of a boundry (window) of an object using the vla_getBoundingBox.
The concept of the routine is to select any object and return two Point window value.
This routine works, but I noticed the Z point is changing depending on the object type drawn in 2d space elevation 0.0.
Test: Open a new drawing. Set the snap value to 1.0 just to make is easy to see values.
Draw three objects: A horizonal line, A Rectangle and Arc.
Load the gbb.lsp and run it, gbb
Select all three objects and notice the results.
It appears that objects the have an curve change the Z value (very little), but Z should be zero.
Try it with a polyline and then PEdit and FIT and re-check the Z value.
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Jan 10, 2013
I use the Repeat command with an index, and when it exits, it writes the last index.
I cannot move it to a new line,nor cancel it.
If i insert a (princ "") inside the loop it moves it to a new line, but also all the outputs of the loop get extra line spaces
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Oct 8, 2013
I need to return the entity name of the largest (longest closed) polyline in a selection set. At this point I have no trouble creating the selection set and even getting the area of the boundingbox, which is not the most accurate way to find the true size, but it's a start. The part that has me stumped is: if I iterate through the selection set, then how can I compare one to the other when I have access to the current entity. I've been staring at examples of lambdas but it seems to me that iterating through the selection set is going about it wrong in the first place.
Below is my current code with a remaining issue. I can return the largest area of the polylines (no good for more than two entities in selection set), but I do not know how to return the entity name:
(IF (> (SETQ SS (SSGET "x" '((0 . "*POLYLINE") (8 . "POOL") (-4 . "<OR") (62 . 5) (62 . 256) (-4 . "OR>")))) 1 ) (PROGN (SETQ a (1- a) ent (CDR (CAR (SSNAME ss a))) en2 (CDR (CAR (SSNAME ss (1- a)))) ar1 (APPLY '* (LIST (LAMBDA (ent) (VLAX-INVOKE-METHOD (VLAX-ENAME->VLA-OBJECT ent) 'getboundingbox 'minpt 'maxpt) (SETQ pt1 [code]......
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Mar 6, 2013
(layoutlist) ... returns a list of strings of the layout tabs in the drawing.I've used this ages... Isn't it a core lisp function, or is it coming from express tools or somewhere else?
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Mar 13, 2012
I've got a subroutine that gets the centroid of a closed polygon (lwpoly). It appears to fail if the polygon has any zero length line segments. I've added a trap that catches the error and "highlights" the offending polygon, but it stops there and does not return to the main function that called the subroutine. Is there a way to get back to the main function from the trap?
Here's the subroutine (original function by _gile (Autodesk LISP Forum 9-18-2006):
(defun return-centroid (lwpoly space / obj Region Centroid)
(setq *error* trap1)
(setq obj (vlax-ename->vla-object lwpoly))
(setq Region (vlax-invoke space 'addRegion (list obj)))
(setq Centroid (trans (vlax-get (car Region) 'Centroid) 1 0))
(vla-delete (car Region))
[code]....
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Jan 5, 2012
I work with ANGTOS and ANGTOF quite a bit. I'm working with latitude and longitude conversions in MAP 3D for an application where accuracy is top priority. Most of the time ANGTOS (and RTOS, for that matter) return an accurate result for the number if decimal places requested, but then I run into a situation like this:
Command:
(angtos (angtof "120.0") 1 16)
"119d59'59.999999999949""
I got it to return properly by specifying only 13 decimal places, but the result makes conversion between coordinate systems inaccurate.
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Feb 1, 2012
Is there anyway to use LISP to list the x,y coordinates of a pline?
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Dec 7, 2013
I am looking for a method to export all the GPS coordinates which have been assigned to each point along with the properties of that point to an excel csv. In our drawings, there are multiple columns and each column has four points and each point has X,Y,Z coordinates. I want to export all this information to an excel sheet.
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Dec 5, 2013
I want to get the minimum and maximum x, y coordinate values of selected lines. In other words, i want to find the top, bottom, left and right edges of a set of lines.
Is it possible to achieve this with a lisp code?
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Jan 8, 2014
I have created a circle from 3topo points. Im having difficulty getting accurate elevation (z) of the center of circle (pile representation) via cad polyline listing. im getting same "z" all through out which in fact is not.
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Mar 19, 2013
I need to draw a table with point number, easting, northing, elevation for a lot of points and need a lisp to read the xl spreadsheet and draw the table.
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Jul 14, 2012
I'm writing function which will facilitate user to offset dimension. After enter command, he select dimension and select point near one of dimension's arrowheads. Then I'm calculating new XLinePoint1 or XLinePoint2 and replacing original.
I have everything done. I thought ... The problem is when user firstly create AlignedDimension and after that he create RotatedDimension by using continous function. After that XLinePoint1 and XLinePoint2 are not parallel to the DimLinePoint (look at image).
How can I get coordinates of points selected in red rectangles?
I know that one is specified as "dimension line defining point" but what about second? How can I get its coordinates? Or maybe there is other way to get this point?
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Jul 16, 2013
I am having nearly 1000 drawings where I need to change the title block in a new format.
I am stuck up in moving all the entities in cordinates 15,280 (upper point) and 205,55 (lower Point) to 275,294 (upper point and correspoing lower point.
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Oct 17, 2011
Is it possible to obtain a list of coordinates for view ports (with dxf codes or otherwise) similar to obtaining a list of (assoc 10) for polylines?
I'm aware I can get the center, width and height from the dxf codes, but what about for clipped view ports with irregular shapes?
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Nov 30, 2012
i have found the following lisp in a previous thread: (shows XY coordinates of the selected blocks)
(defun C:MyFunc (/ ss Index Ename Lst)
(while (or (not ss) (= 0 (sslength ss))) (setq ss (ssget '((0 .
"INSERT")))))
(if ss
[Code]....
I want this information to be added to the blocks as hidden attributes so that i can extract them by attout. The work to be done is : attout to excel, autofill an attribute (numbering) then attin.
but my problem is that i cant think of a way to number those blocks IN ORDER (ie top to bottom or left to right) unless by sorting them in excel first by their x or y coordinates
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Dec 15, 2011
can do a routine that zooms into a coordinate, based on input. So for 1A, it would zoom into the coordinate for 1A.
1A = 1,1
1B = 1,2
1C = 1,3
1D = 1,4
I will try to attempt one shortly and will post it within 1 hour.
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Sep 8, 2011
I have a 2 point LWPOLYLINE that has the following coordinates at its end point when I 'ID' the point.
Command: id
Specify point: end
of X = 709369.3214 Y = 7153039.9690 Z = 269.2143
However if I use..
(vlax-safearray->list (vlax-variant-value (vla-get-coordinates (vlax-ename->vla-object (car (entsel))))))
I get this
(-450567.0 269.288 -450570.0 269.214)
and if I 'dump' the object..
; Coordinates = (-450567.0 269.288 -450570.0 269.214)
; Document (RO) = #<VLA-OBJECT IAcadDocument 09855674>
; Elevation = 7.17399e+006
I don't have a clue where the '-450567.0' is coming from.
I'm in Model Space in 'World' UCS, and I'm confused.. why does the 'ID'd' value not reflect whats going on when I use the vla-get-coordinates approach.
There are many other LWPolylines within the same model that behave normally.
I've attached the drawing (I think!)
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Mar 5, 2013
I have few co-ordinates in notepad like mentioned below. How can i create polyline using read-line function in auto lisp.
x y
0.0,0.0
2.0,0.0
2.0,1.0
0.0,1.0
2.0,0.0
4.0,0.0
4.0,1.0
2.0,1.0
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Mar 28, 2012
I’m trying to create a view port, which covers my entire layout (white/ page area) using the following command
(command “mview” ‘(0 0 0) ‘(297.5 210 0))
However as you will note 0,0,0 is not the very edge corner of my layout (white area) and my white area is smaller then 297.5x 210mm (standard A4 landscape size)
How to obtain the exact measurements and starting coordinates to fully fill my entire layout page (white area)?
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Sep 2, 2013
We have several AutoCAD drawings with hundreds of block references inserted with imprecise coordinates. Now we need to dimension all elements and need to correct these positions.
I am searching for a routine to round these positions up or down towards a 5mm precision so I don't have to manually move every single block element.
Is there any way to automate the task or do you know any workaround (like inserting the elements into a drawing with poorer unit precision settings)?
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Mar 19, 2012
Would like to be able to select mtext explode it get x y coords of last line of text then turn it back to mtext and then launch mtext at a @0,-0.5 justification TL width 5 and display the ribbon.
All seems to work except the (command ...)
Below is my attempt.
(prompt "Select Note")
(setq ss (ssget))
(command "explode" ss)
(setq ss (ssget "l")) ;get last line of text
(setq ent (entget (ssname ss 0))
ent1 (cdr (assoc 10 ent))) ;get x y coords
(command "undo" "1") ;set exploded mtext back to mtext
(setvar "lastpoint" ent1)
(command "mtext" "@0,-0.4" "j" "TL" "w" "5")
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Sep 14, 2013
I found this LISP code that can insert a block at coordinates from an ASCII.
(defun c:universal( / file f a osmode);PointsToBlocks(while (not file)(setq file (getfiled "Input file" "coords" "txt" 4)))(setq f (open file "r")osmode (getvar "OSMODE"))(setvar "OSMODE" 0)(while (setq a (read-line f))(command "._insert" "block1" a 1 1 0))(setvar "OSMODE" osmode)(princ)
What I want to be able to do is insert blocks from an ASCII and also set the x-, y-, and z-scales.
For example, I have these lines in ASCII, the data points refer to X position, Y position, Z position, X scale, Y scale, and Z scale.
30.593589,21.274607,26.235255,0.172826,0.766324,0.066442
30.710182,21.379792,27.054248,0.130816,0.700035,0.043114
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May 24, 2013
I am just starting learning lisp, And I am looking for a fast way to select multiple objects (usually circle) and export their coordinates and ID into a excel sheet through lisp programming.
As you might see in the attached drawing, the red circles are objects wanted. I have been trying to export their coordinates as well as their IDs in grids, e.g D28, Easting: Northing: . I still haven't found a good way to export ID for each circle.
As my code doesn't work, I wonder what's the most effective way to detect errors in lisp
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Jun 20, 2011
I'm trying to define a grid based on polar coordinates.
Can be produced using the following MATLAB
n=1:50000;r=sqrt(n);t=360/((sqrt(5)+1)/2)+1)*pi/180*n;plot(r.*cos(t),r.*sin(t),'o')
I need to insert points based on the polar coordinates defined by the equations. I knew a little bit of LISP 10 Years ago, now it's a total blank. I've been trying to write a script to make this work but after 5 days I'm still without sucess.
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Mar 6, 2013
I got a new work and get it done in the next 2 days, but first I need to do this... from a text file (or excel file, I got both) I got 3 columns, 1 one for node number, and 2 other for X and Y coordinates for each node.
So from that file I need to insert into autocad the node numbers as text (using the current style and height) at the point specified by the other two columns, that are the X,Y coordinates which will be the insertion point of text..
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Aug 29, 2011
I have a rather simple 3rd party custom object... I tried to get its bounding box but the coordinates that come back don't seem to relate at all to the object.
What I'd like are the coordinates of two nodes the object contains...
Is it possible to apply the autocad cursor in some why with the node object snap to get their coordinates?
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Jul 12, 2012
Is there a lisp that will allow me to do a continuous dimension, but will alternate the dimension position from low, high, low and high? If there is no lisp already created, how to create one?
See Continuous dimension attachment for example.
I work at a glass and glazing company and this is how we dimension mullion width and DLO. See typical window dimensioning attachment for window elevation with dimensions.
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Nov 14, 2013
I have a list ("temp.dwg" "temp2.dwg") and would like to add the string "insert text here" into each item in the list resulting in ("insert text heretemp.dwg" "insert textheretemp2.dwg"). how would i go about doing that using LISP?
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