Topic: 3Doffset and 3Dpoly joint ??

[Andrea]

does anyone know if thers is any command to....

1) Joint 3Dpoly with line polyline or 3Dpoly ?

2) Offset with 3d point ??

thanks.

[Swift]

1. Not by default but can be written

2. that is a tricky question, yes, it is possible, yes, in a way it is easy but in another it is extremely difficult. It has to do with the fact that each segment of a 3d polyline has the ability to fall in a different plane. Think of a lwpoly it always has the same elevation thoughout its length so the segments are offset only in the x-yplane and the same z is maintained in the offset entity. To offset a unconstrained 3dpolyline (any 3dpolyline that I can draw) would be a feat of linear algebra and may or not be possible, depending on what you are wanting to do. HOWEVER, if all you want to do is move the 3dpolyline in the x-y plane and maintain the same z for each vertex then that is fairly easy.

 I need more information.

[Andrea]

oh...

Ok....so let'S write a little routine...

I have compared both...LWPOLYLINE and POLYLINE
there is the result..

PLINE
((-1 . <Nom d'entité: 7ef5bfa8>) (0 . "LWPOLYLINE") (330 .
<Nom d'entité: 7ef5bcf8>) (5 . "F5") (100 . "AcDbEntity") (67 . 0) (410 .
"Model") (8 . "0") (100 . "AcDbPolyline") (90 . 4) (70 . 0) (43 . 0.0) (38 .
0.0) (39 . 0.0) (10 129.383 122.43) (40 . 0.0) (41 . 0.0) (42 . 0.0) (10
295.489 185.299) (40 . 0.0) (41 . 0.0) (42 . 0.0) (10 368.576 129.957) (40 .
0.0) (41 . 0.0) (42 . 0.0) (10 421.73 188.398) (40 . 0.0) (41 . 0.0) (42 . 0.0)
(210 0.0 0.0 1.0))

3DPOLY
Choix de l'objet: ((-1 . <Nom d'entité: 7ef5bfb0>) (0 . "POLYLINE") (330 . <Nom
d'entité: 7ef5bcf8>) (5 . "F6") (100 . "AcDbEntity") (67 . 0) (410 . "Model")
(8 . "0") (100 . "AcDb3dPolyline") (66 . 1) (10 0.0 0.0 0.0) (70 . (40 .
0.0) (41 . 0.0) (210 0.0 0.0 1.0) (71 . 0) (72 . 0) (73 . 0) (74 . 0) (75 . 0))


Now with the 3DPOLY I can not see all the endpoints of each segment...
how can I get it ?

I would like to do this..
1) select the entity
2) filter if it'S a POLYLINE or LWPOLYLINE or LINE
2) Get all the end points and put in a list
3) delete the selected entity
4) and remake it with LWPOLYLINE with all the points in the created list.

this is the way it seem would like to do.
But if you have better idea...or better suggestion...i'll take it.

[Bob Wahr]

Now with the 3DPOLY I can not see all the endpoints of each segment...
how can I get it ?

they are exposed in VBA although I know you don't care, I would assume to lisp as well.

4) and remake it with LWPOLYLINE with all the points in the created list.

If that's what you want, assuming you don't have a lot of them, this will be a lot less headache and will get it done:

EXPLODE
<pick a 3dpolyline>
-CHANGE
P

E
0

PEDIT
L
J
P
<select other lines, polylines, lwpolylines as desired>

and you have done it.

[Andrea]

Ok Bob..

good suggestion....but do you think this is the only way ?

[Bob Wahr]

No, not the only way.  Like I said, if you have a lot of them, it might be worth writing a program.  if not, it's a pretty big hassle.  Have to figure out which way each thing is running, compare coordinates, figure out what if any fuzz factor you want to apply.  Definitely not a 30 minute program.

[Andrea]

Ok thanks...

Last question....:

What exactly the difference between 3DPOLY and simple PLINE (excluding the width) ?

[Bob Wahr]

THE SHORTEST MOST BASIC ANSWER (sry) is that polylines (light or heavy) have a consistant Z relative to the plane they are in or to put it another way, they are flat.  3dpolylines can have a different relative Z at each vertex.

[MP]

Just to add what Bob said, I believe they are also ucs agnostic even tho they have a 210 group.

[Andrea]

 :ugly:

[Bob Wahr]

Are you making fun of the fact that my left eye is smaller than my right?  See if I ever try to help you again.

[MP]

Alfred, is that you?

[Bob Wahr]

I'm Melvin the Mop Boy.

[Kerry]

It's time to test the water.

[LE]

Is there a drawing that I can run some tests?.....

Also:
There are plenty of information about geometry out there in hyper-space, look into patterns, sequences, paths, algorithms... all about analytic geometry, graphics, etc..... why are you trying to use or focus on what AutoCAD has built-in?

There are forms to follow a pattern or path.... but is not simple or easy to do.

[MP]

True, but a dark roast has less caffeine.

[LE]

True, but a dark roast has less caffeine.

?

My previous post was for the OP.....

[LE]

EXPLODE
<pick a 3dpolyline>
-CHANGE
P

E
0

PEDIT
L
J
P
<select other lines, polylines, lwpolylines as desired>

and you have done it.

This is the small test I did:

Code: [Select]

Command: -ch
CHANGE
Select objects: Specify opposite corner: 2 found

Select objects:
Specify change point or [Properties]: p

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/Thickness]: e

Specify new elevation <varies>: 0

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/Thickness]:

Cannot change elevation of objects with differing Z coordinates.
Command: *Cancel*


[Bob Wahr]

EXPLODE
<pick a 3dpolyline>
-CHANGE
P

E
0

PEDIT
L
J
P
<select other lines, polylines, lwpolylines as desired>

and you have done it.

This is the small test I did:

Code: [Select]

Command: -ch
CHANGE
Select objects: Specify opposite corner: 2 found

Select objects:
Specify change point or [Properties]: p

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/Thickness]: e

Specify new elevation <varies>: 0

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/Thickness]:

Cannot change elevation of objects with differing Z coordinates.
Command: *Cancel*


doh!  My bad.

[Bob Wahr]

EXPLODE
FLATTEN
<pick>

PEDIT
L
J
P
<select other lines, polylines, lwpolylines as desired>

[Serge J. Gianolla]

Ciao Andrea,
For 3D Offset check Jun 03 here:
http://new.cadalyst.com/code/
Have not tried it!
By the way, tu as ecrit 3D Poly joint, un joint c'est ce qu'on fume but maybe that's what you were after?

[deegeecees]

Ciao Andrea,
For 3D Offset check Jun 03 here:
http://new.cadalyst.com/code/
Have not tried it!
By the way, tu as ecrit 3D Poly joint, un joint c'est ce qu'on fume but maybe that's what you were after?

Hey now, I don't think she's a hop head.

[LE]

tu as ecrit 3D Poly joint, un joint c'est ce qu'on fume

He sounds like a serious person.... I don't think so.

[Kerry]

Who is "she" deeg' ?

.. and I think Serge was joshing about the smoke.

[deegeecees]

Who is "she" deeg' ?

.. and I think Serge was joshing about the smoke.

Oooooops, sorry Andrea. I forgot.  :ugly: Andrea is a common name in the U.S. for females. No offense meant towards you whatsoever.

[LE]

Same when using:

Louis

That is not right....   :pissed: ... it is:

Luis

The first one is like the one reporter that works in the Daily Planet with Clark Kent.....

 

[Bob Wahr]

not quite.  Ms. Lane was Lois, not Louis.  Louis is either a saint or a trumpet player.

[LE]

not quite.  Ms. Lane was Lois, not Louis.  Louis is either a saint or a trumpet player.

He he.....

1. Not saint et-al
2. I like "Hello dolly"... do not have that talent....

[Bob Wahr]

1. Not saint et-al

Sounded nicer than dirty grimy town with absolutely nothing going for it except half a McDonalds sign spanning an oil slick though.

[Serge J. Gianolla]

First names are deceptive from country to country. It is only recently i realised Kerry Brown was a guy! [Sorry Kerry - I was more thinking along the line of KAK!] In italian Michele is for males, but a lot of english girls are using same spelling, not double L for their names!

[Kerry]

kerry
kerri
kerie

blame the Irish, Serge

[Kerry]

I'spose this may have helped   


[edit:]
or perhaps not
<link removed>

[LE]

Is that you Kerry?

[Kerry]

.. very old photo Luis 

[Bob Wahr]

I'm thinking that somewhere in the world exists a picture of Kerry that isn't from an old passport and I wonder if I will ever see one.  Given that this is the one that always appears, probably not.

[LE]

.. very old photo Luis 

Nice to meet you sir!

[Kerry]

Someone who can should probably split this thread.

[Mark]

I'll take care of it later tonight. The thread that is.

[MP]

Very nice to make your acquaintance Mr. Brown.

[Kerry]

That was when I had hair worth growing long Michael.

<sigh.wav>

[MP]

Didn't seem to affect your personality, so still very pleased to meet you.

[Kerry]

....  [Sorry Kerry - I was more thinking along the line of KAK!] ....

 

for the uninitiated :-

Kerri-Anne, host of the top-rating ‘Mornings with Kerri-Anne’ show on Channel 9, has been a part of daily life for Australian television viewers for more than 30 years.

edit:
modified to suit the sensibilities of those possibly upset by the politically incorrect : 

[Andrea]

sorry guys....verry interesting..

but is the swamp a chat room ?

 

[Bob Wahr]

perhaps not but seeing as people asked you questions pertaining to the original topic that you aren't answering, there was no reason for it to not degenerate.

[Andrea]

perhaps not but seeing as people asked you questions pertaining to the original topic that you aren't answering, there was no reason for it to not degenerate.

Questions ??...dont see any serious questions here.. sorry   

[Jochen]

For PEDIT3D have a look at www.black-cad.de
I'm just finishing the OFFSET3D-problem too.
Regards
Jochen

[Andrea]

Jochen ..

First..welcome to the swamp.
and second....thanks, i'll take a look.