AutoCAD Visual LISP / AutoLISP :: Defining A Grid Of Points With Polar Coordinates
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.
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.
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.
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.
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.
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.
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?
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.
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.
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
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’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)?
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)?
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)
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
I have a drawing that has 2D pipeline (only x and y, z value =0) and 3 topo contour lines ( with x, y and z vaules). I need to divide the the 2D pipeline into say 2000 points and then get the corresponding z values from the topo contour lines. I think it can be done by interpolating between the z values for the two apparent intersection points of the 2D line and the contour lines, the x and y values will be the same for the points that falls between these two aparent intersections. Is there any lisp out there that can do that.
The above gets me the grid lines; but I have a block inserted at both ends of the grid line; how do I get the selection of those entities (selection set "frame") after each array?
or I would need to map a point list and draw each grid individually how do I go about that?
Attached is the sample of the output I'd like to achieve using LISP.
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..
I have a slightly unusual query that I can't seem to find a solution for elsewhere. I have an existing OS plan that is 'off grid', and would like to adjust the vertices at the ends of all the existing lines and polylines so that they all sit on a grid point, ie round all vertices to the nearest whole number. Is there a quick command or script that does this?
I need to place a circle, of a user-defined radius, as a marker at the endpoints of all lines in a drawing. how to accomplish this using lisp? It doesn't matter if they overlap; I can use OVERKILL to delete those objects.
What I have is a topo plan in 3D (All contour lines have x, y and z values). My pipeline is on x and y coordinate only. I need to get the corresponding z value for say about 2000 points on the pipeline.
I need very very often to know the angle between two surfaces to write cnc programms...At the moment i draw allways two lines normal to the line between the two surfaces an use then the angle measuring tool.Works good, faster then bks and dimensioning, but need also time and always need to delete the lines after...
Is it possible to get a lisp which ask für 1 point on the first surface, 1 point on the other surface and two points on the line between the 2 surfaces? So the lisp know 3 points of each surface and can give out the angle between... Should be allways between 0-180°
So it needs only 4 klicks to get a angle! That would be so great! Is there a lisp programmer who can make this possible?
how to use AutoLISP to draw lines between two points. I have x,y,z coordinates for the end points in an excel sheet which I can save as a text file. I need to pull the coordinates from the file and use them to draw the lines. There are 2000+ lines so it is not feasible to draw them manually.
Looking to make a selection set of points that are on a specific layer, and then create a dimension between, in this case, two points. I feel like it should be very simple, but I can't get it to work for the life of me. Here is the test code I've been playing around with:
