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    [Tutorial] Create a (TIN) from Surveyed Pts - using SU only

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    • AnssiA Offline
      Anssi
      last edited by

      This might be a bit OT as you need AutoCad...

      I took an old Autolisp program I once made and modified it to do this:

      Scan a selection for text entities. Read the text and convert it to a number and multiply it with an user supplied factor (for unit conversions). Draw a line from the text insertion point to the text upper right corner, using the text as the Z height of the line endpoints. Repeat until all texts in the selection have been processed.

      The result should be a cloud of small lines that the SU Sandbox from Contours tool can cover with a surface.

      How it works:

      • copy the txt23d.lsp file somewhere where Autocad can find it. It should work if put in the same directory as the drawing file to process.
      • type (load "txt23d") to the AutoCad command line and press Enter
      • type txt23d and Enter
      • It asks the user for a selection
      • It asks the user for a Z scale factor

      Disclaimer: The lisp has almost none error checking. Scale factor should reset itself to 1 if you forget to give one. It's not rocket science - the real height point may be not exactly at the text insertion.

      Anssi

      TXT23D.zip

      securi adversus homines, securi adversus deos rem difficillimam adsecuti sunt, ut illis ne voto quidem opus esset

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      • A Offline
        andymaw
        last edited by

        That did the job! Thanks so much for that. Just got to find the time to put the guide points into SU and it should be sorted.

        Cheers again

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        • R Offline
          Rob D
          last edited by

          I could really, really, really do with that lisp script... but only have acad LT 😢

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          • V Offline
            VicBStard
            last edited by

            How do I get a spreadsheet or comma separated x,y,z points into SU without having to actually position points manually? Is there a way to automate this?

            Cheers

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            • GaieusG Offline
              Gaieus
              last edited by

              Hi,

              Sure, use Didier's Cloud plugin; works great.

              Gai...

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              • M Offline
                messire
                last edited by

                Hi all
                Its getting confusing: the script is installed and delaunay2 installed.
                The file is imported from an autocad file with simple points that i put in Z coordinates in acad.
                When imported in SU they appears as little crosses ( cannot succeed in zooming on them to see exactly), and when i try to triangulate them, the ruby says " Some objects of the selection aren't construction points". How is this possible since they are all similar and all points?
                Nothing happens then..

                Is there any way i can resolve this?
                I've put a sample from points ( acad) here if anyone has a hint!
                http://dl.dropbox.com/u/2095112/3Dpoints.dwg

                thnx
                Nils

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                • M Offline
                  messire
                  last edited by

                  Good lord!
                  I've found it!
                  3D points from surveyors are often blocks in acad. When i imported them, i forgot that, and they were in SU still components!.
                  A simple select all + explode solved the issue and made it possible to triangulate!

                  Relief!

                  Sorry for the buzz!
                  N

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                  • GaieusG Offline
                    Gaieus
                    last edited by

                    @messire said:

                    A simple select all + explode solved the issue and made it possible to triangulate!

                    Yup - I was already starting to write this up - good that I read the very last post.
                    😉

                    Gai...

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                    • mitcorbM Offline
                      mitcorb
                      last edited by

                      I am tagging this for future reference.
                      mitcorb

                      I take the slow, deliberate approach in my aimless wandering.

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                      • P Offline
                        ProfKi
                        last edited by

                        I'm trying to follow this thread to create a 3D landscape. I have the survey points or 'crosses' in SketchUp, all in the correct x,y,z positions. I selected all and exploded the components without any problem. I then reselected all the crosses, and selected the 'Set Centre Point' - but it puts a single construction point in the middle of the drawing - not one at the centre of each cross.

                        I'm using SU Pro ver 7.1.6860

                        Can anyone see what I'm doing wrong?

                        Grateful for any pointers!!

                        D...

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                        • GaieusG Offline
                          Gaieus
                          last edited by

                          Hi D...

                          Do the other way round (provided that those components er the instances of the same component definition) as the order is important:

                          1. Edit one of them (double click)
                          2. Set the centerpoint inside in that component - now if they are all the same components, each should be updated instantly with this centerpoint in them
                          3. delete the geometry - i.e. the "crosses" - leaving only the centerpoint inside the component
                          4. NOW exit the component and explode all...

                          Gai...

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