Minimum length of Line / Polylines that can be broken by Break command?

Hi all,

I want to break the polylines at intersection with first and next point being the same.
There are many cases where one line crosses the other with the crossover length (overshoot) being very minute, say 0.000001, 0.0001 or, to be in general, less than 0.1 units.

When I tried to break the polylines at the crossing points it fails certain times with the message "At least one break point must be on polyline".

When I tried to investigate more about the circumstance of failure, I found that when the crossover length of polylines are less than 0.001, it fails.

It does break for the length of 0.001, but the shortest line vanishes.

Somewhere I had read that the break command uses the 'Filletrad' variable value to set the break tolerance. In my case, the 'Filletrad' value was 0.5, but it still worked for 0.001 crossover length of polyline/

(Before breaking, I zoom to the center at crossover point, at 0.0001 window size)

My questions are
(a) Does any one ever had similar experience?
(b) Do any one got a solution to break very small overshoots, say 0.0001 or even less crossover lines?
(c) From where does the tolerance value for break is got?

Any help is much appreciated.

Thanks,

MNRaghu

 

Did this issue not understood by anyone or is it tough to answer?

I expected atleast a few answers for this issue, but unfortunately nothing!

Please let me know if any more explanation is needed and help to resolve this issue,

Thanks,

MNRaghu

 

Maybe it's just me, but I can't find your original post in the NG. Please repost it,
surely someone can help you around here.

Dr Fleau
We are born naked, cold and hungry. Then things get worse.

 

MNRaghu, I have no answers but,

this is a my old post: Pedit join precision - 06/12/2001
maybe can help you.

(tested in: 15.06 - 15.05 - 15 - 14.01)

(setq L1
'( (0 . "LINE")
(100 . "AcDbEntity")
(67 . 0)
(8 . "0")
(100 . "AcDbLine")
(10 0.0 0.0 0.0)
(11 100.0 0.0 0.0)
(210 0.0 0.0 1.0)
)
)

(setq L2
'( (0 . "LINE")
(100 . "AcDbEntity")
(67 . 0)
(8 . "0")
(100 . "AcDbLine")
(10 0.0 0.0 0.0)
(11 0.0 100.0 0.0)
(210 0.0 0.0 1.0)
)
)


Command: (setq L11 (subst '(10 0.0000000001 0.0 0.0) (assoc 10 L1) L1))

Command: ((0 . "LINE") (100 . "AcDbEntity") (67 . 0) (8 . "0")
(100 . "AcDbLine") (10 1e-010 0.0 0.0) (11 100.0 0.0 0.0) (210 0.0 0.0 1.0))

Command: (entmake L11)
((0 . "LINE") (100 . "AcDbEntity") (67 . 0) (8 . "0") (100 . "AcDbLine") (10
1e-010 0.0 0.0) (11 100.0 0.0 0.0) (210 0.0 0.0 1.0))

Command: (entmake L2)
((0 . "LINE") (100 . "AcDbEntity") (67 . 0) (8 . "0") (100 . "AcDbLine") (10
0.0 0.0 0.0) (11 0.0 100.0 0.0) (210 0.0 0.0 1.0))


Command: _pedit ... >>> I CAN Join the two lines in one

(then delete the polyline)

---

Command: (setq L11 (subst '(10 0.000000001 0.0 0.0) (assoc 10 L1) L1))

Command: ((0 . "LINE") (100 . "AcDbEntity") (67 . 0) (8 . "0")
(100 . "AcDbLine") (10 1e-009 0.0 0.0) (11 100.0 0.0 0.0) (210 0.0 0.0 1.0))

Command: (entmake L11)
((0 . "LINE") (100 . "AcDbEntity") (67 . 0) (8 . "0") (100 . "AcDbLine") (10
1e-009 0.0 0.0) (11 100.0 0.0 0.0) (210 0.0 0.0 1.0))

Command: (entmake L2)
((0 . "LINE") (100 . "AcDbEntity") (67 . 0) (8 . "0") (100 . "AcDbLine") (10
0.0 0.0 0.0) (11 0.0 100.0 0.0) (210 0.0 0.0 1.0))


Command: _pedit ... >>> I CAN NOT Join the two lines in one polyline

Note:
1° ex. > 0.0000000001
2° ex. > 0.000000001

---

HTH

Marco

--
________________________________________________

Marc'Antonio Alessi (TV) Italy
(strcat "NOT a " (substr (ver) 8 4) " guru.")

O.S. = XP Pro 2002 Ita - Sp.1
AutoCAD = 2004 Ita - Sp.1a
________________________________________________