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how to make cross section from 3D Polyline


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I need Help.

 

How to make cross section from 3D polyline. I have also done a autocad sample file with this. is there any Lisp program to make this easy..

VIJOY

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First ,Your cross section line must be a 3d poly line with vertex along with elevation, where cross section line intersect with plan 3d poly line must be a vertex.

Ok a simple trick draw your section line then use trim on your 3d plines the end point will have a 3d value use 3dpoly  to join together this is your section. need to do some rotate3d stuff and realig

Vijoy,   This lisp will work for you.      Link: -    https://www.cadtutor.net/forum/topic/33301-3d-polyline-intersection/?do=findComment&comment=270303 A great code by David Bethel

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First ,Your cross section line must be a 3d poly line with vertex along with elevation, where cross section line intersect with plan 3d poly line must be a vertex.

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Ok a simple trick draw your section line then use trim on your 3d plines the end point will have a 3d value use 3dpoly  to join together this is your section. need to do some rotate3d stuff and realign to x axis. Or use the co-ords to draw a new line. 

 

Pretty sure there is something about intersect with 3dpoly's around.

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Manila Wolf
20 hours ago, vijoy said:

I need Help.

 

How to make cross section from 3D polyline. I have also done a autocad sample file with this. is there any Lisp program to make this easy..

VIJOY

 

Vijoy,

 

This lisp will work for you.      Link: -    https://www.cadtutor.net/forum/topic/33301-3d-polyline-intersection/?do=findComment&comment=270303

A great code by David Bethel and enhanced by Lee Mac. Kudos to those two.

 

For it to work it appears that you need to have UCS set to world and be in top view.

I tried it on your example drawing and it works. Run the lisp, pick one end of your X-X line then pick the other end of the X-X line.

A 3D polyline will be drawn passing through the theoretical intersection points.

 

 

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  • 1 month later...
31 minutes ago, pmadhwal7 said:

may this lsp will help you

thanks

but this for long section, 

i am looking cross section 

offset value for left & right

see attach image

 

c section.JPG

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7 minutes ago, Ish said:

thanks

but this for long section, 

i am looking cross section 

offset value for left & right

see attach image

 

c section.JPG

u can use as a cross section too....

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2 hours ago, pmadhwal7 said:

u can use as a cross section too....

i try many time but it not asking select center line or alignment.

 

plz write step or upload image.

 

thanks

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11 minutes ago, Ish said:

i try many time but it not asking select center line or alignment.

 

plz write step or upload image.

 

thanks

follow the instruction 

first it was asking horizontal scale then vertical scale then chainage then datum then pick 3d line and place anywhere you want

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1 hour ago, pmadhwal7 said:

first it was asking horizontal scale then vertical scale then chainage then datum then pick 3d line and place anywhere you want

 

according this process only draw long profile. Sir,

 

Command: LS

Enter horizental scale :1000

Enter vertical scale :1000

Enter starting chainage :0

Enter datum value :41

Select 3Dpoly line :
Specify starting point :

 

see attach image

222.JPG

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35 minutes ago, Ish said:

Enter starting chainage :0

i got your point sir.

 

here 

Enter starting chainage :0 (this value must be type calculate one  total distance from center line (in negative format like -28.583) 

                                             *take aligned dim vertex to vertex then make total distance and type at Enter starting chainage. -28.583

 

Thanks

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On 7/15/2019 at 10:00 AM, vijoy said:

I need Help.

 

How to make cross section from 3D polyline. I have also done a autocad sample file with this. is there any Lisp program to make this easy..

VIJOY

YES, NOW YOU CAN MAKE cross section & LONG SECTION from 3D polyline.

THIS LISP WILL HELP YOU TOO MUCH. THIS LISP FROM MR. pmadhwal7

 

FOR ME IT SOLVE MY PROBLEM, THAT WAS FROM LONG TIME PENDING.

 

THANKS MR. pmadhwal7

long_section_3dp.lsp

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  • 2 years later...
prodromosm

Hi Ish. I know that the post is old but i try this code and draw the section but not fill the text .Givew me only 0 nad 90 in the text !!! Not like the image you post

 

Thanks

 

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Saqib_theleo
36 minutes ago, prodromosm said:

Hi Ish. I know that the post is old but i try this code and draw the section but not fill the text .Givew me only 0 nad 90 in the text !!! Not like the image you post

 

Thanks

 

try to change current text style height to 0.

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prodromosm

Hi Saqib_theleo .Thanks for the help. I want to add two things in the code can you Help?

 

1) Ask for section number and Insert  on top in the midle of the section the section ( for example D1 , D2  etch)

2) draw a center line  i 0,y   with legth  (Hmax-Hmin)

 

Thanks

43981866_csection.JPG.933a4b9db7103c461f7c439e1ee39690.JPG

Edited by prodromosm
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Saqib_theleo

You're welcome, I am actually unable to add or modify codes in the Lisp but hope some Lisp masters read your post and try to help you.

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