AutoCAD Visual LISP / AutoLISP :: How To Find The Fore-most Point Of A Group Of Entities
Feb 15, 2012
I have a lisp routing that the user has to use, to create a ucs, that is exactly on the front of the entity the user selects, so that whne they are drafting, labeling, dimensioningn the 3D entity, none of the drating lines are hidden when plotted.
The code is as follows:
(setq obj (vlax-ename->vla-object ent))
(vla-getboundingbox obj 'LowerCorner 'UpperCorner)
(setq LowerC (vlax-safearray->list LowerCorner))
(setq UpperC (vlax-safearray->list UpperCorner))
[code]...
Then I do a condition to see which points are greater than others, and move the ucs depending on the view to the foremost point. The program works perfectly.... however, often, they forget to use it.
I was wondering if I could incorporate it in another lisp that everyone uses, but not having the user pick the entity they want to be in front of (sometimes they pick the wrong entity). Instead, take the group of entities (anywhere between 1 to 30 per drawing (these are piping spools, so the entity count is not that great in model space)) and set a front working plane in model space. Working in paperspace is not an option, we're just too deep into our templates and processes.
I know there is a vmin and vmax, but they are for the X and Y axis, a VMax along the Z-axis would be great.
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Jan 17, 2012
I am trying to create a selection set (or LIST) of all objects inside a unnamed GROUP.
I found a means to access the unnamed group, however I am having trouble creating the list.
Command: (entget (cdr (assoc 350 (dictsearch (namedobjdict) "ACAD_GROUP"))))((-1 . <Entity name: 7efe6280>) (0 . "GROUP") (5 . "130") (102 . "{ACAD_REACTORS")(330 . <Entity name: 7efe5c68>) (102 . "}") (330 . <Entity name: 7efe5c68>) (100 . "AcDbGroup") (300 . "") (70 . 1) (71 . 1) (340 . <Entity name: 7efe6268>) (340 . <Entity name: 7efe6260>))
In the example above, there are 2 entities in the group.
What I want to do is to remove a certain entity from the GROUP, then delete the entity.
Repeat until all entities of that type are removed (I can figure this part out...).
How do I create a Selection Set (or LIST) of all entities inside a GROUP?
To access the first GROUP name in the dictionary:
(cdr (assoc 3 (dictsearch (namedobjdict) "ACAD_GROUP")))
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Jun 28, 2013
I continue learning....
(setq ins (vlax-ename->vla-object ( ssname sele cod)) nombre (vla-get-name ins) ) (setq bloque1 (vla-item (vla-get-Blocks (vla-get-Document ins) ) nombre ) ) (setq s_ent1 (vla-item bloque1 1)) (setq pt1 (vla-get-startpoint s_ent1 ))(setq pt2 (vla-get-endpoint s_ent11 ))(setq s_ent2 (vla-item bloque1 2)) (setq pt3 (vla-get-startpoint s_ent2 ))(setq pt4 (vla-get-endpoint s_ent2 ))(command "_pline" pt1 pt2 pt3 pt4 "c")
Why dont draw de _pline?
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Oct 12, 2012
I have a drawing with various layouts that when I do a Zoom Extents the drawings is reduced to the size of a point.
I have done all the usual, ie: look for extra entities that are "out in space" so to speak and there are none.
I wonder if I have a block or image which may have an insertion point "out in space" and if this may be the issue.
Is there some way to Select all entities or Blocks (insertion point) that may exist outside a particular area ie: drawing limits.
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Jul 17, 2013
I having real difficulty finding a lisp that will find and replace blocks. There are plenty out there and AutoCAD 2013 and lower has a Find and Replace Blocks. However, the frustrating catch is I can seem to find a routine that will allow me to replace only those blocks that I select with a selection set of my choosing. The built in function replaces all of them and will not let you exclude some. We have PID drawings that we want to replace valves on, but not all valves. We don't want to rename. We don't need to BEDIT the existing block.
1) Pick group of blocks
2) specify a new block that will replace all instances of old block
3) replace inserted block with different block. Leaving others alone.
I'm thinking this should be easy, but my search has failed. The blocks in question are not dynamic or attributed either.
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Jan 27, 2012
How can I find a block with a specific name and get what the coordinates are? What we have is our Bill of Material is attributed blocks. I am attempting to change the first one. Well all of the lines that list the parts are seperate blocks with the same name. Now the Top Line of the Bill of Material is a different named block. If I can find the coordinates of this block I can then select the first line to do what I need to.
If needed: AutoCAD 2013 User using Visual LISP for editing LISP and DCL files Also I have AutoCAD 2011 currently still available for us, but we are using AutoCAD 2013 for 99.9% of AutoCAD use
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Jan 29, 2003
Using Lisp or VLisp, how can I find the Start & End Point of an AEC_WALL ent. ?
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Dec 5, 2011
I need one lisp to get invert levels, I am having Invert levels and cordinates of two points of an arc how can I find invert level of a point middle of tht arc?
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Sep 20, 2011
How would I go about this. if a two blocks or polygons are overlapping area?
A good method or the algebraic formula for a function to tell me if a point is inside a polygon or block's area?
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Jun 2, 2012
This is what i would like to make a lisp for: if the user gives the number tree the last tree inserted entity's are deleted. If the user gives the number four the last four inserted entity's are deleted.
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Oct 2, 2011
I know through the block command you can write out a selection of entities to a single drawing.But what I am wondering is if it is possible to have two drawings open, and transfer data quickly between the two?
As an example as we are detailing an assembly we create a title block around a detail, put dimensions and notes on as needed and would then like that to be transfered into another drawing next to the previously transfered detail drawing.
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Nov 27, 2012
I want to code this lisp. The problem which I face is, In some drawings which come from the client, there are a lot of blocks.
I want to detect the blocks which has no sub-entities (but attribute) and add a rectangle inside this block, If it is an attribute add a line from 0,0, to insertpoint of attribute.
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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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Jul 22, 2013
I have 2 selection sets and I'm looking for a more elegant method of checking if both sets contain the exact same entities (note - the order of entities might be different).
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Nov 19, 2013
I have redined AutoCAD's copy command alias to C, but to also do other things, like set a few important variables in the background. One of the lisps I've incororated are making new viewports, that also create layers that are visibly specific to the viewport being created.
We were tasked a while ago to do an easy job of copying entities (dimensions, text and what not) in a layout. The problem is, users are copying the viewports too, which is bit more ineffificent than using the create viewport command I developed.
Is there a way to see if a selection set includes (0 . "VIEWPORT") entities? If the check returns nil, well then all is good. If the check returns "true", then I can prompt the user that a "VIEWPORT" entity is selected. I can then exit the command, or ask the user if they are sure they want to copy the "VIEWPORT" entity.
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Aug 16, 2013
I have a lisp that draws variety of entities such as lines, arcs, hatches, points, blocks, text etc. How can I make one single block containing all of them, i.e. one block that has all items drawn since the lisp was invoked.
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Jul 9, 2013
I have code that will set and sae a current UCS to the front of an entity, of course, depending on the viewpoint. This is so, because we need all draft lines in front of 3D solids, such as dimensions, leaders for labels, text entities and so on (the reason for not putting these entities in paper space is another discussion ).
But I'll have on of two problems on numerous occasions:
1. The user forgets all together to run the command.
2. The user will pick the wrong entity that is in the foremost position in that view.
The code I have utilizes the following:
(setq ent (car (entsel)))
(vl-load-com)
(setq obj (vlax-ename->vla-object ent))
(vla-getboundingbox obj 'LowerCorner 'UpperCorner)
(setq LowerC (vlax-safearray->list LowerCorner))
(setq UpperC (vlax-safearray->list UpperCorner))
Then I'll analyze the X, Y and Z of both the lower and upper corners, and set my UCS to whatever is proper.
Is there a "LowerCorner" and an "UpperCorner" for all entities. I can't see "VSMIN" and VSMAX" working because the elevation of the returned coordinates is always "0,0"
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Dec 25, 2012
I have uploaded the handout for my AU2012 class to Google Drive. The link is [URL] It contains the detailed explanation for all the source code used in entmake-ing and entmod-ing the new MESH (aka Subdivision Surfaces) entities. [URL]
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May 19, 2013
I am modifying stuff in a dynamic block insert entity. There is no "endblk" entity at the end of these definitions and I need to cycle through every entity within the block definition. When it gets to the last entity, I get an error because you cannot entnext passed the last entity. There are 2 things:
1. How to retrieve the # of entities in a block without cycling through it.
Or
2. A quick lesson in the *error* function, I cannot figure out how to implement this. I basically want to to say:
(if (entnext myent)) returns a error, don't abort & continue on.
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Dec 4, 2013
I am working on a flood inundation, I would like to find a lisp or command(i'm not finding) to connect two points with a given elevation following the surface file or surface entities.
here is a small section as example right now it's just guesswork, some of these have taken a week to connect all the sections.
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Jul 23, 2012
significance of extra dxf 1 groups in the entity data of a multiline attribute? I am looking at one for the first time, so I don't know whether or not to expect multiple 1 groups. In the single example I have created there are two and the first one seems to be ignored. Can I count on that being the case all the time? Data for the one I'm looking at follows, and what shows up on the drawing display is only the contents of the second dotted pair with 1 as a key.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
((-1 . <Entity name: 7ec37d18>)
(0 . "ATTRIB")
(330 . <Entity name: 7ec37d10>)
(5 . "323")
(100 . "AcDbEntity")
(67 . 0)
(410 . "Model")
[code]...
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Mar 19, 2012
We have this need to have all of the solids in a drawing to be placed in the "solid" layer.
Sometimes folks are drafting lines to develop these solids, and keeping the lines on the "solid" layer, rather than moving them to another layer, or deleting them altogether.
I could get folks to run this command before leaving the drawing.
I'm thinking something along the lines of:
Select all entities that are on the solids layer that are not solids.
If nil, great, do nothing.
If entities are selected, let me do something with them.
I'm hoping the following can be modified ever so slightly.
(setq non_solid (ssget "X" (list (cons 0 "3DSOLID")(cons 8 "solid"))))
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Oct 9, 2013
I'm trying to find acceptable point values to feed to the vlax-3d-point function for a vla-addmtext function. With vanilla lisp I just provide the point as x y = "7/32" "2-3/8". So I assumed that I could drop a 0 in for the z like: (VLAX-3D-POINT "7/32" "2-3/8" 0).
Then I thought I was going to be tricksy and try (vlax-3D-point (getpoint)) believing that I could pick the point and get what I need to feed the function, but yet again, no deal. The command line gave me:
node
of #<variant 8197 ...>
Nothing I can use in my code. So how do I find the point in a format that vlax-3d-point will like?
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Dec 19, 2011
What is the magic word for put a point at each end of an arc, the lisp I have only put a point at center of the arc.
(defun cAA ( / i j ss e1 e2 p1 p2 p3 points )
(if (setq i -1 ss (ssget '((0 . "ARC"))))
(progn
[Code].....
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Apr 15, 2011
I found a lisp to get block attribute data to a other block. See attachment. I can only apply it to one block. I like to apply it to selected blocks or blocks in a group. Is this possible?
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Jun 9, 2004
how to check snap errors in drawing in a specified layer against some other layer. means first layer should end with second layer otherwise place error.both layers have linear features.
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Dec 24, 2013
My drawing constitutes of many blocks and other objects , and i need to find specific blocks (with same block name) in my drawing which i cannot find them one by one and i though that i can find them all with lisp routine ..
so , i wanna specify point out of my drawing area and lisp routine will draw to line from basepoint of those blocks to specify point when i select one reference block.
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May 24, 2007
What would be the ideal way to find out the overlapping text.
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Jun 25, 2012
I would like to get the cell with a specific name in Excel.
In Excel you can give a cell a custom name like "Project_Name".
How do I get the sheet and cell(row,column) of the cell with this custom name ?
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Nov 1, 2011
We use multi-leader objects in our drawings. When the multi-leader and its value are to be replicated throughout the drawing, we create mleaders with fields that show the contents of the first mleader. That way we can update only the value in the first mleader and all of its children will update as well. It works nicely for us.
Here comes one snag. If one of us opens a drawing with which we are not intimately familiar, we don't know which mleader is the parent of which children. There might be fifty parents and four hundred children in a drawing so going through them by hand is a big productivity drain.
What I need to do is write a routine that will let the user select the mleader that includes the field and have the routine highlight and/or zoom to the parent object.
I thought I should be able to find that info in the dxf codes for the mleader, but I am either missing it or it's not there.
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May 17, 2012
I have a routine that looks for an MText date stamp and replace the old date with a new date. The problem is some MText strings appear encrypted. Below is an example:
{\H1.121x;\C1; \LFY 2011-12\l \H0.6252x;04-30-11} This is what I should get when I extract the string (as shown in Property window)
(1 . "\pxi-2.1818,l4.3636,ql,t4.3636;{\fSymbol|b1|i0|c2") is what I get when I extract the group code.
I'm running AutoCAD 2012 on Windows 7.
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