SSGET
the underscore (_) is needed with W, F, WP, :S but not with X, A, C, CP, I, L, P, :E ...
(ssget '(2 2))
Create a selection set of the object passing through (2,2):
+. The undocumented +. mode forces (ssget) to remain in point mode, similar to
setting PickAuto to 0.... the "+." puts (ssget) into "point" mode. It helps the ":S"
single-mode act just like (entsel) by avoiding implied selection windows.
A All like "X" but filters frozen out
Selects all objects on thawed layers.
B Box
Selects all objects inside or crossing a rectangle specified by two points. If
the rectangle's points are specified from right to left, Box is equivalent to
Crossing. Otherwise, Box is equivalent to Window.
C Crossing Simular to Window selection
Selects objects within and crossing an area defined by two points. A crossing
selection is displayed as dashed or otherwise highlighted to differentiate it
from window selection. Specifying the corners from right to left creates a
crossing selection. *** (Specifying the corners from left to right creates a window
selection.) (ssget "_C" '(0 0) '(1 1))
Caution: the area must be on the screen for this to work properly - CAB
CP Crossing Polygon
Selects objects within and crossing a polygon defined by specifying points. The
polygon can be any shape but cannot cross or touch itself. AutoCAD draws the
last segment of the polygon so that it is closed at all times. CPolygon is not
affected by the PICKADD system variable.
(ssget "_CP" '((1 1)(3 1)(5 2)(2 4)))
Example with filters (ssget "_CP" '(Point list) '(Filter List))
(setq ss (ssget "_CP" '((0 0)(10 0)(10 10)(0 10)) '((0 . "INSERT") (66 . 1)) ))
Caution: the area must be on the screen for this to work properly - CAB
(vl-cmdf "._zoom" "_E") ; Extents
:D Duplicates OK, else duplicates are ignored
:E Everything in aperture
Everything within the cursor's object selection pickbox.
F Fence
Selects all objects crossing a selection fence. The Fence method is similar to
CPolygon except that AutoCAD does not close the fence, and a fence can cross
itself. Fence is not affected by the PICKADD system variable.
G Groups
Selects all objects within a specified group.
I Implied
Implied selection (objects selected while PICKFIRST is in effect).
L Last
Last visible object added to the database
:L Rejects locked layers
M Multiple
Specifies multiple points without highlighting the objects, thus speeding up
the selection process for complex objects. The Multiple method also selects two
intersecting objects if the intersection point is specified twice.
:N Nested
Call ssnamex for additional information on container blocks and transformation
matrices for any entities selected during the ssget operation. This additional
information is available only for entities selected via graphical selection
methods such as Window, Crossing, and point picks.
Unlike the other object selection methods, :N may return multiple entities with
the same entity name in the selection set. For example, if the user selects a
subentity of a complex entity such as a BlockReference, PolygonMesh, or old
style polyline, ssget looks at the subentity that is selected when determining
if it has already been selected. However, ssget actually adds the main entity
(BlockReference, PolygonMesh, etc.) to the selection set. The result could be
multiple entries with the same entity name in the selection set (each will have
different subentity information for ssnamex to report).
P Previous
Selects the most recent selection set. The Previous selection set is cleared by
operations that delete objects from the drawing. AutoCAD keeps track of whether
each selection set was specified in model space or paper space. The Previous
selection set is ignored if you switch spaces.
:P Rejects Viewport
:R Allows entities in a long transaction to be selected.
:S Force single object selection only
:U Enables subentity selection - 2006+
Cannot be combined with the duplicate (":D") or nested (":N") selection modes.
In this mode, top-level entities are selected by default, but the user can
attempt to select subentities by pressing the CTRL key while making the
selection. This option is supported only with interactive selections, such as
window, crossing, and polygon. It is not supported for all, filtered, or group
selections.
:V Forces subentity selection - 2006+
Treats all interactive, graphic selections performed by the user as subentity
selections. The returned selection set contains subentities only. This option
cannot be combined with the duplicate (":D") or nested (":N") selection modes.
This option is supported only with interactive selections, such as window and
crossing. It is not supported for all, filtered, or group selections.
W Window
Selects all objects completely inside a rectangle defined by two points.
Specifying the corners from left to right creates a window selection.
(Specifying the corners from right to left creates a crossing selection.)
WP Window Polygon
Selects objects completely inside a polygon defined by points. The polygon can
be any shape but cannot cross or touch itself. AutoCAD draws the last segment of
the polygon so that it is closed at all times. WPolygon is not affected by the
PICKADD system variable.
X Extended search (search whole database)
Entire database. If you specify the X selection method and do not provide a
filter-list, ssget selects all entities in the database, including entities on
layers that are off, frozen, and out of the visible screen.
Also at the command prompt "Select objects:" you can enter
Add, Remove, Undo,
:U Enables subentity selection. Cannot be combined with the duplicate (":D") or
nested (":N") selection modes. In this mode, top-level entities are selected by
default, but the user can attempt to select subentities by pressing the CTRL key
while making the selection. This option is supported only with interactive
selections, such as window, crossing, and polygon. It is not supported for all,
filtered, or group selections.
:V Forces subentity selection. Treats all interactive, graphic selections
performed by the user as subentity selections. The returned selection set
contains subentities only. This option cannot be combined with the duplicate
(":D") or nested (":N") selection modes. This option is supported only with
interactive selections, such as window and crossing. It is not supported for
all, filtered, or group selections.
Systen Var
PICKADD controls whether subsequent selections replace the current selection set or add to it.