AutoCAD Visual LISP / AutoLISP :: Tangent Line And Pass Through Two Points
Aug 20, 2012
We have a need to select a tangent line/polyline etc and then select two other points we would then like to have the program draw an arc through the two points and yet still be tangent to the initial line/polyline that we picked. We don't care what the radius is as we believe there is only one solution anyway. It would be wonderful if we could just use the Arc command and select start>Second Point> then just use the Tangent Osnap but I guess that is out of the question :-)
The only code that I have come across that even resembles this only allows for one point not two (STILL VERY HANDY AND VERY SLICK)
(vl-load-com)
(defun near_vertex_arr (obj / dxf_obj e_next obj_vlax pt_sel par pt_first pt_snd i bulge)
;bruno.valsecchi
[Code]....
How does everyone else hande this? By they way... I dont care what language it is written in :-)
I want to use it to plot different views which I will append to the command when it is called from within AutoCAD.This code will, of course, print view one.Currently my worst case is 25 views and, for that situation, I have simply repeated this code 25 times with a different function name an view number for each view. Eventually I would like to make a dialog box that would allow me to select with checkboxes (toggles) the views to print and with a button to print all.
For example, if I wanted to plot view 25, after I had loaded this lisp routine I would enter, on the command line in AutoCAD, the function name ("pp" perhaps?) followed by some variable (in this case 25, but could be any view name. ie. 01, elev, detail) and the view name would be inserted at the appropriate place.
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.
I am trying to get the end points of an invisible line it would be the line that you offset I know all about polar I just don't know which angle to add or subtract and I will pick the point on the side I want it to be on I am going to pick 2 lines and I want them to offset invisible lines in the middle the lines are not parallel.
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.
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:
I'm trying to write a lisp routine to create a two line MLEADER but i can only get one line of text. Creating the MLEADER manually from the command line i just have to hit enter after the first line of text to add a second line. How would i do this in a lisp routine?
I am using autocad 2013 and importing PDFs into the drawing and recently the OSnap points within the pdf are missing. The PDFs are of floorplans and I was able to measure from wall to wall using endpoints and midpoints. Now I am only able to select the endpoints on the frame of the pdf.
Is there a switch that might have been turned off?
My first lisp, so bring it hard on me I want to be an expert in autolisp .
My lisp is meant to do the following:
draw a rectangle with ”0” fillet. It can be done either via rectangle command, or pline command. The attached lisp has the variant with the pline-case.
The, I need to draw inside a smaller rectangle, with a fillet value, that is promoted and indicated by the user. The smaller rectangle must be centered inside the bigger one. I thought it was a good idea, to take one insertion-point for the bigger rectangle.
and to calculate a 2-nd insertion-point for the smaller rectangle, via "polar" function.
What I get:
the 2-nd insertion point is put the same as the 1-st one.
I wish to draw the bigger rectangle with one layer "example: Layer 1", and the smaller rectangle with another layer "example: Layer 2".
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.
There are times that I have a really long curb polyline that has both line and arc segments. I wish to pick two points along that polyline and have it give me the distance between those two points along the path of the polyline.
Do we have this ability natively? Have I been missing something all this time? Normally I have to make a copy of the original entity, ... break, break, list erase or undo....
I want tp write my first programm with autolisp. I use Autocad 2012(rus). When I run my script I see that some of points are missed in the autocad. Maybe I do something wrong?
(setq RB 300)(setq RM 70)(setq N 12)(setq M 11)(setq I 0)(setq J 0)(defun alphai (i) (/ (* (/ (* 360 i) N) PI) 180))(defun gammaj (j) (/ (* (/ (* 360 j) M) PI) 180))(defun XIJ (I J) (* (+ (* RM (cos (alphai I))) RB) (cos (gammaj J))))(defun YIJ (I J) (* (+ (* RM (cos (alphai I))) RB) (sin (gammaj J))))(defun zij (I J) (* RM (sin (alphai I))))(setq I 0)(setq J 0)(setq PT0 (list 0 0 0))(setvar "CMDECHO" 0)(repeatM (repeat N (setq PT (list (XIJ I J) (YIJ I J) (ZIJ I J))) (command "_point" PT) (setq I (+ I 1)) (setq PT0 PT) ) (setq I 0) (setq J (+ J 1)))
It is working only if I have the points in the DWG. If there are no points, I receive "Unknow command DPL". Is there anything I can do in order to avoid this error?
I have to put some trusts between two beam. It sounds easy but i'm unable to handle the divide and round off commands in the lisp. See attachement also.
To draw my trust between the 2 beams, what I normally do, is that I manually take the distance between the two points say it's 10 000 and wrote it down. Then I divide it by my max gap, say 1200, it is the max space between trust.
10 000/1200 = 8.333333 that's the result of how much trust and space between them that i'll need, 8 trusts, 9 spaces between the 2 beams. (That is what I'm unable to do in the lisp, tell it to round off 8.333 to 9 and use 9 for divide command)
What I manually do at this point to draw these trust is that I must create a temporarly line between the 2 beams, perpendicularly to these and divide it by 9.
It gives me 8 cross (or point) to draw my trusts. All this is long to do manually because I have many bay in building and I have to redo this operation for every the bay.
So, what I would like the lisp to ask is:
Specify distance between two beams (Between where and where) :
Specify the lenght of the trust :
Specify max gap: I would like to answer a number here, say like 1200 max
(The lisp should draw the lines on the current layer, color and linetype of the current layer and not draw a line at the beginning and at the end because that's where my Beams are. I hoped you understand, see attachement.
Should also have something that handle a ESCAPE hit or cancel, something like this:
I'm working on a program that requires me to analyze a series of 3D coordinates (which describe the start and end points of individual lines) and combine those points that are collinear (there are lots of smaller line segments, some of which are co-linear and overlapping in space) into one single line.
how to analyze these points to find out which ones can be combined. For example, I might have 6 lines, 3 are separate and have their own specific orientation, but 3 are overlapping and in the same direction (look as a single line on the screen). I'd like to modify my point list so that it describes 4 lines... (the 3 individual ones and one which combines the 3 overlapping lines).
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 trying to write a program to align a block with two selected destination points. - first the user is prompted to select a lwpolyline of a block entity - then he is prompted to pick two destination points
I face problem with the sub-routine SegmentPts. It is supposed to return the coordinates of two vertexes on both sides of the picked point on a lwpolyline using entsel. But here in my program, when i am picking a point using entsel on a lwpolyline inside a block entity, it is not returning the two vertexes on both sides of the picked point. In stead, it returns some other points of the selected LWPOLYLINE. Why it is doing so? Where is the problem in my program?
It works fine with my other programs where i pick on a LWPOLYLINE entity. In this particular case, the LWPOLYLINE is inside a Block entity and the program is not returning correct points.
Please check Lisp Program below:
(defun C:alb() (setq ent1 (entsel " Pick on one side of LWLINE ofa Block:" )) (setq ent (nentselp (cadr ent1))) [code]........
