Author Topic: Triangulation (re-visited)  (Read 242967 times)

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pedroantonio

  • Guest
Re: Triangulation (re-visited)
« Reply #735 on: September 01, 2017, 10:32:54 AM »
Hi ymg . What happened with this project ? Any new update !!

CostinBos77

  • Mosquito
  • Posts: 19
  • Land surveyor in action !
Re: Triangulation (re-visited)
« Reply #736 on: December 20, 2017, 10:29:14 AM »
Hi !

Can someone to upload the latest revision of this grate program 'Triang V0.6.7.lsp'  . I have found only 'Triang V0.6.5.5.lsp' .

Thanks in advance .
Land surveyor in action !!!

:yes:

MatGrebe

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Re: Triangulation (re-visited)
« Reply #737 on: December 20, 2017, 10:59:34 AM »

CostinBos77

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  • Land surveyor in action !
Re: Triangulation (re-visited)
« Reply #738 on: December 20, 2017, 11:23:15 AM »
Land surveyor in action !!!

:yes:

CostinBos77

  • Mosquito
  • Posts: 19
  • Land surveyor in action !
Re: Triangulation (re-visited)
« Reply #739 on: December 20, 2017, 03:52:34 PM »
I am fighting with this challenge from 2013 .

I hope the next step will be to cut the TIN by different geometric irregular shapes like in the picture .
« Last Edit: December 20, 2017, 03:57:34 PM by CostinBos77 »
Land surveyor in action !!!

:yes:

pedroantonio

  • Guest
Re: Triangulation (re-visited)
« Reply #740 on: January 11, 2018, 05:23:56 PM »
Any news from ymg ?? I he OK ??

serkancavuslar

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  • Posts: 3
Re: Triangulation (re-visited)
« Reply #741 on: March 12, 2018, 03:37:08 PM »

pawcyk

  • Mosquito
  • Posts: 9
Re: Triangulation (re-visited)
« Reply #742 on: May 21, 2018, 04:46:56 AM »
Hi everyone.
Can enyone check this file. In my opinion function PROF works wrong with this settings.

pawcyk

rw2691

  • Newt
  • Posts: 125
Re: Triangulation (re-visited)
« Reply #743 on: July 21, 2018, 12:50:23 PM »
You have a horizontal grid increment of 0.05, and vertical increment of 0.01 --- these are not practical.

Try z min = 207.0 instead of 207.5
     vrt exageration = 10
     hrz increment = 20
     vrt increment = 1


Hippocrates (400BC), "Life is short, craft long, opportunity fleeting, experiment treacherous, judgment difficult."

pawcyk

  • Mosquito
  • Posts: 9
Re: Triangulation (re-visited)
« Reply #744 on: July 24, 2018, 04:53:26 AM »
Unfortunately, I need this when designing roads...
I do not understand why this is important for this program.
pawcyk

rw2691

  • Newt
  • Posts: 125
Re: Triangulation (re-visited)
« Reply #745 on: July 26, 2018, 06:54:33 AM »
It hangs because the station range is across 87', and marking stations at every 0.05' (1740 lines) is literally pouring ink on the page from a bottle.

The same, the vertical range is 4', and you are setting grid lines at every 0.01' ... building 400 lines with more ink.

Likewise, if your snap is active they are all snapped to the same place.

That is why I said your parameters are not practical.

If water can shed at a 2% grade, why should you need to analyze every hundredth of a foot?

Just asking.

Hippocrates (400BC), "Life is short, craft long, opportunity fleeting, experiment treacherous, judgment difficult."

pawcyk

  • Mosquito
  • Posts: 9
Re: Triangulation (re-visited)
« Reply #746 on: July 27, 2018, 01:28:45 AM »
..each additional centimeter of the asphalt layer is important.
I know that it creates many lines with such settings, but it does't matter to me.
Correct mapping of the terrain is important to me.

BIGAL

  • Swamp Rat
  • Posts: 1037
  • 40 + years of using Autocad
Re: Triangulation (re-visited)
« Reply #747 on: July 29, 2018, 03:11:10 AM »
Increasing density does not increase accuracy as the bottom line its based on a triangle at a time, the more dense the triangle the better the model, also this is not quite correct, the triangle direction has a big influence on the shape, in trying to explain taking points square across a road is more accurate than random points along a road. 30 years experience.
A man who never made a mistake never made anything

ribarm

  • Gator
  • Posts: 2747
  • Marko Ribar, architect
Re: Triangulation (re-visited)
« Reply #748 on: February 25, 2019, 01:07:52 PM »
Here are my latest routines... First (vl-some) version is working somewhat faster (unknown reasons)...

Code: [Select]
  ;;; Delaunay Triangulation ALISP by M.R. ( Marko Ribar, d.i.a. - architect )
  ;;; Example without supertriangle and with convex hull triangles - optimized as possible - using (vl-some) loops extensively...

Code: [Select]
  ;;; Delaunay Triangulation ALISP by M.R. ( Marko Ribar, d.i.a. - architect )
  ;;; Example without supertriangle and with convex hull triangles - optimized as possible - using (while) loops extensively...

Reverse link to related topic :
http://www.theswamp.org/index.php?topic=15784.msg593180#msg593180

Regards, M.R.
« Last Edit: February 27, 2019, 03:37:58 AM by ribarm »
Marko Ribar, d.i.a. (graduated engineer of architecture)

:)

M.R. on Youtube

ribarm

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  • Posts: 2747
  • Marko Ribar, architect
Re: Triangulation (re-visited)
« Reply #749 on: February 26, 2019, 12:31:13 AM »
I am really sorry, I had one blunder in one sub function which I thought was doing like I am showing, but it returned 3D point instead of 2D...

Quote
  ;; Evgeniy Elpanov optimized (circumcircle) sub function

  (defun circum ( p1 p2 p3 / ang c r )
    (if (not (zerop (setq ang (- (angle p2 p3) (angle p2 p1)))))
      (setq c (polar p3 (+ -1.570796326794896 (angle p3 p1) ang) (setq r (/ (distance (mapcar '+ '(0.0 0.0) p1) p3) (sin ang) 2.0)))
           r (abs r)
      )
    )
    (list (if c (list (car c) (cadr c))) r)
  )

LISP routines reattached and I hope that now everything is fine... If you still find something, please report...
M.R.
Marko Ribar, d.i.a. (graduated engineer of architecture)

:)

M.R. on Youtube