AutoCAD Visual LISP / AutoLISP :: Selection Set Filter
Apr 23, 2013
I'm putting together some quick function that I can send 2 arguments and get from it the total area of a given hatch on the given layer. I think everything is in order but I'm having trouble with the selection set filter:
(DEFUN GET-HATCH-AREA (HATCH LAYR / area sset) (COND((AND(ssget "X" '((0 . "HATCH") (2 . HATCH) (8 . LAYR))) (SETQ area 0) (VLAX-FOR H (SETQ sset (VLA-GET-ACTIVESELECTIONSET (VLA-GET-ACTIVEDOCUMENT (VLAX-GET-ACAD-OBJECT)))) (SETQ area (+ (VLA-GET-AREA h) area))) (ALERT(STRCAT "Total area = " (IF (OR (= (GETVAR "lunits") 3) (= (GETVAR "lunits") 4) ) (STRCAT (RTOS area 2) " sq. in. (" (RTOS (/ area 144) 2) " sq. ft.)") (RTOS area) ) ) ) (VLA-DELETE sset) ) ) ))
I have some strings like the ones below. They are always in the same format. The first line is Cold Water, the second is Hot Water and the third is Hot Water Return.
I want to build a selection set based on whether it is CW, HWS or HWR. Right now I have a routine to retrieve the string by using ENTSEL. In other words if I want to use the line of text for Cold Water I have to select it.
I'd like to be able to window them all and filter the SS for only the string containing CW and conversly HWS and HWR. SSGET function filter.
I've created a lisp that draws the boltholes of a pipe flanges, using the correct number of holes, at the correct diameter at the correct bolt-hole diameter and then rotates. Everything works seamlessly, when i do just one flange. But I've discovered that fewuently there will be mulitple times when a user will have to perform the command.
So the idea I had was to do the following:
Select all circles with (setq CirclesFirst (ssget "X" (list (cons 0 "CIRCLE"))))
Go through the code to create the new circles.
Select all circles with (setq Circles (ssget "X" (list (cons 0 "CIRCLE"))))
Remove selection set "CirclesFirst" from "Circles".
But what for some reason (command "_.select" Circles "R" CirclesFirst "") does not work.
I've been twigging around with a selectionset, but no luck. I need to build a ss with several named blocks and a few dynamic blocks which get selected as anonymous. Unfortunately not all dynamic blocks should be selected and I can find no way of either filtering out a list of dynamic blocks to exclude nor any way to campare to a list of dynamic blocks that I want selected. Below is the best idea that I had but if I wrap it into a foreach with an exclusion list, I get an empty selection set returned. (I'm guessing that I need to trim the pairs each iteration and only return the matches instead.)
The other code is long and I'd rather not confuse things; if I do not try to filter out any Unames, then everything works great and fast. Once I add in the "foreach i blklst" the code breaks and I get:
How to automate the unreconciled layer list to automatically freeze all the layers in the list when opening drawing. This would force the user to select what layers they want shown rather than freezing / turning off the layers they don't want.
in order to filter for a certain attribute tag named MYTAG
I am working with a custom LISP routine which reports out to a CSV file, an attribute extraction file - but I need my routine to ONLY evaluate blocks which have the MYTAG attribute tag. Then, if it passes that first check, it evaluates another list of Tags within those blocks - a list of tags which I have specified elsewhere in the code.
I am trying to modify my existing code as little as possible, and I think that if I do it at the line (which I've pasted above) - that will "pre-qualify" my selection set....
ATTACHED LISP IS THE FILE I AM WORKING WITH --- THE ACTUAL LINE I WANT TO MODIFY IS AT:
I wonder if I have to check if the "ssget" is empty.
I have a lisp to zoom extents in visible objects on the screen.
My interest is to filter before applying:If I have selected objects, it zooms in these objects. If I'm not have selected objects, continue as it is today, applying a zoom in the visible scene.
The result would be similar to a zoom of "3dsmax" (press the Z key)
I'm trying to fix an issue with entlast where if the user hits escape during the process, the wrong entity gets erased, etc. Here's the problem code...
From a function that would have just inserted a dynamic block at 0,0 then modified it - here's where we pick up..
I can create an empty selection set (setq EMss (ssadd)). As I loop through a list I can use the counter to create selection sets on the fly by using:
(set (read (strcat "ss" (itoa cnt))) EMss) and even keep a list of the ssets created with (setq sslst (cons (strcat "ss" (itoa cnt)) sslst)). But when I try to add an ename to the ss with (ssadd ename (read (strcat "ss" (itoa cnt))), I get a error: bad argument type (SSADD NEXTE (READ (STRCAT "ss" (ITOA CNT)))).
why I can create the sets but not add to them this way? I can add to them from the command line.
I wrote a lisp program which creates a selection set using ssget. Then I use the bounding box commands to get the lowest point of that selection set. Now I want to move that selection set as a whole using the vla-move command. Can we vla-move a selection set?
I use extended data on 2d entity in AutoCAD 2010. In a lisp program, I have filtered with extended data selection. Filters work with entity like: line, polyline and Mline but with insert entity it don’t work.
To get the 'File Selection dialog box' in AutoCAD via LISP, which command should I use other than 'GETFILED' ?
I have a program which using GETFILED to select the drawing file , but I think this dialog box size is too small to browse folder/file , as you cant see the favorites list and you cant resize the dialog box.
I'm working on a lisp that goes through a whole list of files and does different things to those files. I've been racking my brain for a way to select just a folder via a dialogue box, but haven't found a way. I'm sure it can be done with dcl, but I don't know where to start.
This would not be the standard "file" selection box, but would only list the folders and let me select one even if there are others "under" them. This is what I'd like it to look like.
I'm not sure if there is a standard AutoCAD box that I could call for this or not
I have a lisp routine that creates a "frame wall" and I want to be able to automatically dimension said wall within the same routine. I have created two sets of points, each set being on its own new layer. I have made selection sets of each set of points, and want to cycle through each set dimensioning as required. This what I have so far for this part of the routine:
When I run the program I get the error: bad point argument. So what I think is happening is that the ssname command is not returning the actual value but just the name? I am new to AutoLisp and even newer to selection sets so be easy... Along with this, I am also curious as to how a selection set is ordered when it is chosen ie how does it determine what would be in (ssname sel1 0). Also, how would one go about deleting the points in these selection sets after the dimensioning has been completed.
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:
when it comes to setting paperspace as the 410 ssget list value as the name can be modified and I need it to work in all drawings. I tried setting a variable to the paperspace layout name and using a print function at the (410 . "model") point but without sucess.
How to get the individual components of a block that has just been exploded within a lisp routine into a selection set. I want to alter the layer of each element to the insert layer of the block. I may also make one or two other changes according to what I find in the block.
I wrote a lisp program which creates a selection set using ssget. Then I use the bounding box commands to get the lowest point of that selection set. Now I want to move that selection set as a whole using the vla-move command. I am having trouble doing this. Is this possible? Can we vla-move a selection set? Is there a workaround?
I downloaded a lisp routine that will align block attributes. The problem is I can only select the attributes one at a time. I'd like to be able select multiple attributes using the selection window or a crossing window, but I haven't had much luck. If you use the AEATTSHOW command, it give you a prompt to "select using window" by pressing W. I'd like to have the same functionality for my Align attributes routine.
Below is the portion of code I currently have to select attributes one at a time:
;* Select all attributes to align with the parent selected above and add the attribute entname and the block ;* entname to a list in format ( (AttrEntName BlkEntName) (AttrEntName BlkEntName) (AttrEntName BlkEntName) ) ;* while (/= TempAttr nil) (setq TempAttr (nentsel " Select Attributes to align: ")
What about creating an AutoLisp selection set from .NET - is it possible, if so I would prefer to do that instead?
The goal is to create some objects in .NET (using activeX or managed code) and then have some way to access these objects via the command line I'm assuming they only way is using an AutoLISP selection set.
and so on, but the example above caters for situations the users enter the values of 1, 2, or 3. If the user enters anything else I get a nil response from AutoCAD. So I devised the following
(if nil (alert "Wrong selection"))
but no response from AutoCAD qua an alert
also tried to be more in uniform with the rest of the lisp and wrote
When you select similar using autocad it select similar in entire drawing. What i want is i am able to select similar using the same setting of selecting similar but with window selection instead of entire drawing ?
I need to create a command which could change a color of an allready existing selection set when activated. For example i have a command which creates a cube, where each specific group of lines were added to different selection sets. how can i recall any created selection set by its name and change its color?
