AutoCAD Visual LISP / AutoLISP :: Intersection Between Line And Circle
Dec 12, 2002
I was looking for a post on the subject of line and circle intersections and found one that Bill Z had posted. I decided to incorperate one of the replies into my own code. In particular Luis Esquivel's code. With some minor modifications I was able to add the onseg argument that extends intersection points for the line to the circle. I also modified it to return only one point or two points depending on the line and circle supplied and the onseg argument. It seems to work great.
; test function
(defun c:go ( / )
(ed_init)
(while
(or
(not (setq ent (entsel "
[code].....
I tried to adapt the code provided by scottbolton in the "Insert block at intersection" thread to suit my needs. I would like to be able to enter a block name, and let that block be inserted at intersection points.
But i keep getting a DXF error.
(defun c:sbx (/) (vl-load-com) ;;;define block used in program (setq bloktype (getvar "USERS5")) (prompt "asiswaarde: ") [code]......
how can you get the last point you picked on a Circle because I was going to run the TTR and use the tanget command and have it exit and I need to get the point I pick on the circle
Can a AutoLISP command be written to read an attribute in a block and draw a circle with the attribute as the diameter using variables? The appilcation is taking the diameter of a tree trunk (the attribute), multipling by 12, and drawing the canopy circle on hundreds of those blocks. So the circles drawn will vary in size.
Not sure how this could be set up, i'm not familiar with LISP writing at all.
1) Read block, single, mulitple or definition?
2) Read Attribute
3) Varaible of attribute, (attribute is an inch measurement...it needs to be multipled by 12 to get feet for final use as circle diameter drawn)
4) Draw circle, variable, with diameter coming from attribute variable (attribute in inches that is multipled by 12)
5) Center point or circle to be block's base point
I have a window schedule lisp routine that places a 6-sided polygon around text that label each window. I want to change the code so that its a circle instead of a polygon. Here is the code line that needs to be modified:
You have a dwg with multiple sets of different blocks and a circle you want to place on the insert point of each set blocks.
You select the circle then select one of the blocks in the set and the circle is placed on the insert point of each of the blocks in that set. It would save time from doing it manually and save on mistakes.
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'm trying to change a routine i just wrote that draws 3d pipes. I wanted to make it so that when a user selects the beginning point and ending point of the pipe, the LISP changes the ucs to that vector, draws the circle at the beginning point and extrudes it to the second point.
It actually works great except when the ucs changes, so do my user points because of teh origin change. Is there a better way I might get this to do what I wnat it to?
(setq ip (getpoint " Pick First Point:"))(setq ep (getpoint " Pick Second Point:"))(command ".ucs" "za" ip ep)(setvar "osmode" 0)(command ".circle" ip "d" od)(command ".extrude" (entlast) "" (distance ip ep))(command ".ucs" "w")(setvar "osmode" oldsnap))
I am trying to draw a line between two lines and I put together the following. It works great if the start/end points are perpendicular to each other. How do I solve if line one start point is in a positive direction and line two is in a negative direction?
(defun c:test () (setq L1 (car (entsel " Select the first line: ")) L2 (car (entsel " Select the second line: ")) )
I am having a problem with starts and ends of lines. I have draw two lines, end of first is start of second. The problem is because, (cdr (assoc 11 (entget line1))) and (cdr (assoc 10 (entget line2))), somehow, are not the same,
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.
There are many lisp that draw offset line but what about opposite way , I have wall of double line i need to delete one of them let's say inside wall line .
why i need to do this usually when i tracing in external program like autocad architecture or Revit or archicad i just need outline of exterior and interior walls !.
is there way that can delete the offset line ?(or within range predefined in lisp to prevent interfering of lines deletion).
I have little Autolisp experience, what I need is a lisp routine that will divide a 3D Poly line to say about 1000 points and add index to the points from the start of the line to the end of the line. It is very important that the index be from the start to the end of the line, because we extract the info to excel and then use the x,y and z co-ordinate of the points on our hydraulic analysis program. We need to have the index and the x, y and z co-ordinates on our Excel sheet sorted by index and not by x, y and z.
To be more clear the 3D poly is a pipeline profile so we need to have the points in order by index and not by x, y and z.
Is it possible to control the UCS without using the command line? I'd like to access it and control it with vlisp much the same way I can access DXF groups and manipulate insertions. Seems like it should be possible to play with it's definition inside the object model.
I have a custom command that I can initiate (c:TxtE). The function starts running but I need to begin adding several inputs at the command line following this. (ex: "4" "all" "" "oldtext" "newtext"). How do i do that within lisp once the custom command has already begun? If I need to modify the function how would i pass all these as optional type variables?
I've written my first little Lisp function.What it's for is drawing a simple borehole profile that can then be used to draw stylized cross sections on top of it.
Upon start the lisp, pick a point on screen (to get the X coordinate [x1 below]), then enter ground level at the command line [g1 below], then enter as many thicknesses as are present in the borehole log (will vary, but typically between 3-12). These I added to a list, because that seemed to make sense when I did it.
What I want it to do then is draw a pline from x1, g1 down to the next point (x1,g1 minus the 1st thickness), then the next (x1,g1 minus the 2nd thickness) etc., to the bottom of the borehole.
Then my CAD guys can sit there, and using the borehole logs, enter the values of the boreholes and it draws them on the screen, making it easy to join th dots.
It might be good if it placed a Acad point at each point as well, but I'm not overly bothered about that at the minute.
There is a very complecated drawing. Texts are on a line and crossing a line or something like that. Some texts has insertion points on the line. When the line is selected by LISP, only the specific texts with insertion points on the line are selected. Does it make sence?
Any lisp programme for creating a line profile and chainage. I have attached a sample drawing. The blocks on the line have elevation and lines are drawn from the datum .If i manually draw it will take too much time.
I have a lisp file that reads in a point list from a text file and creates a number with a circle around it for every point, then a line from one circle to the next in line with the center point of each circle. Is there a simple way of making the lines "go behind the circles". The portion of code that creates the circles, lines and text is as follows and a cutout screen dump of what it looks like is below.
(setq amount 0) (foreach item lines ;;; ;; ;;; Create the text ;; ;;; ;; (setq x (+ (atof (nth 2 item)) (car pt_origin))) (setq y (+ (atof (nth 3 item)) (cadr pt_origin)))
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.
