Topic: Open and closed 2D&3D curves selection set filters

[ribarm]

Hi all,
I am not sure are those examples correct... I don't really know can Polyface Mesh be open or closed, or it has only single DXF70 code (70 . 64)...

So for closed curves 2D&3D, I suppose this is correct...

Code - Auto/Visual Lisp: [Select]

1. (setq ss1
2.   (ssget
3.     (list
4.       '(-4 . "<OR")
5.       '(0 . "CIRCLE")
6.       '(-4 . "<AND")
7.       '(0 . "ELLIPSE")
8.       '(-4 . "<AND")
9.       '(41 . 0.0)
10.       (cons 42 (* 2 pi))
11.       '(-4 . "AND>")
12.       '(-4 . "AND>")
13.       '(-4 . "<AND")
14.       '(0 . "*POLYLINE,SPLINE")
15.       '(-4 . "<AND")
16.       '(-4 . "&=")
17.       '(70 . 1)
18.       '(-4 . "<NOT")
19.       '(70 . 17)     ; Polygon Mesh open in N direction and closed in M direction
20.       '(-4 . "NOT>")
21.       '(-4 . "<NOT")
22.       '(70 . 49)     ; Polygon Mesh closed in both M&N directions
23.       '(-4 . "NOT>")
24.       '(-4 . "AND>")
25.       '(-4 . "AND>")
26.       '(-4 . "OR>")
27.     )
28.   )
29. )
30.  

And for open little different, but opposite generally speaking...

Code - Auto/Visual Lisp: [Select]

1. (setq ss2
2.   (ssget
3.     (list
4.       '(-4 . "<OR")
5.       '(0 . "ARC,LINE,HELIX")
6.       '(-4 . "<AND")
7.       '(0 . "ELLIPSE")
8.       '(-4 . "<NOT")
9.       '(-4 . "<AND")
10.       '(41 . 0.0)
11.       (cons 42 (* 2 pi))
12.       '(-4 . "AND>")
13.       '(-4 . "NOT>")
14.       '(-4 . "AND>")
15.       '(-4 . "<AND")
16.       '(0 . "*POLYLINE,SPLINE")
17.       '(-4 . "<AND")
18.       '(-4 . "<NOT")
19.       '(-4 . "&=")
20.       '(70 . 1)
21.       '(-4 . "NOT>")
22.       '(-4 . "<NOT")
23.       '(70 . 16)     ; Polygon Mesh open in both M&N directions
24.       '(-4 . "NOT>")
25.       '(-4 . "<NOT")
26.       '(70 . 48)     ; Polygon Mesh open in M direction and closed in N direction
27.       '(-4 . "NOT>")
28.       '(-4 . "<NOT")
29.       '(70 . 64)     ; Polyface Mesh
30.       '(-4 . "NOT>")
31.       '(-4 . "AND>")
32.       '(-4 . "AND>")
33.       '(-4 . "OR>")
34.     )
35.   )
36. )
37.  

Any insight will be appreciated...
M.R.

[ribarm]

Forgot ab HELIX... ss2 updated... Any comments?

[roy_043]

Unimportant: Some ANDs are superfluous in the first ssget filter.
IMO it would make more sense to completely exclude polyface meshes in both filters as they are hardly curves.