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  1. #1
    Super Member qball's Avatar
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    Default topography / survey points

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    is it possible to create a surface quickly in Autocad using 3d survey points on a DWG?
    The way I did it was 3dpolylines and then lofting the surfaces. Quite time consuming. Hoping for a faster way.

  2. #2
    Senior Member marmo's Avatar
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    Default Dtm

    Step 01_ lisp DTM: If you have a cloud of points you cant triangulate points with 3dface.

    _001.jpg
    _002.jpg
    _003.jpg

    Step 02_lisp Autocurve: You can draw curves on 3dface of DTM

    _004.jpg
    _005.jpg

    Step 03_lisp LV_curve to mesh:

    _006.jpg
    _007.jpg
    _008.jpg
    _009.jpg

    Step 04_famous lisp M2S, mesh to solid:

    _010.jpg



    File zip with commands lisp:
    01_DTM_AC_C2M_M2S.zip

  3. #3
    Senior Member marmo's Avatar
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    Default

    Lisp curve to mesh works only with line: need to explode pline obtained with Autocurve.

  4. #4
    Senior Member marmo's Avatar
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    Default For complex structure

    Step 01, lisp mesh 2 point --> If tou have a mesh, obtained with previous posted lisp, or EDGESURF, or a primitive mesh object you can insert points on al vertex of mesh

    _011.jpg

    Step 02, lisp nodesert --> After you can insert block or 3dblock on obtained points.

    _012.jpg
    _013.jpg
    _014.jpg

    Step 03, lisp sweep with multipath --> You can explode mesh, convert 3dface in surface and extract edge (after use overkill of express tools)

    _015.jpg
    _016.jpg
    _017.jpg

    Zip files with lisp:
    02_M2P_NS_SWMP_ZETA.zip

  5. #5
    Senior Member marmo's Avatar
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    Default MESH to LOFT SURFACE!

    I apologize: lisp is in italian language and i'm not able to modify for translation.
    But I decided to post it because it works differently than MeshToSolid lisp.

    You have your mesh:

    _018.jpg

    With ths setting:

    _019.jpg
    _020.jpg
    _021.jpg

    With this setting:

    _022.jpg
    _023.jpg
    _024.jpg


    Red = solid
    Blue = loft surface
    Yellow = loft section


    File zip with lisp:
    10_MeshToSurf.zip

  6. #6
    Senior Member marmo's Avatar
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    Default Referred to MeshToSurf

    Difference between mesh an loft surface

    Mesh to surf1 copia.jpg

    Difference between lisp M2S and MeshToSurf (above) and difference between command Thicken ("Ispessisci" in italian) and Ticken by MeshToSurf.

    Mesh to surf2 copia.jpg

  7. #7
    Senior Member marmo's Avatar
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    Default The beginning: IF I do not have a points cloud?

    At worst you can have only a block with attribute that indicates the Z of the land.
    This lisp is able to draw a point to Z given the TAG of the block.

    _025.jpg
    _026.jpg


    Lisp file:
    04_ATT 2 POINTS_ENG.lsp

  8. #8
    Senior Member marmo's Avatar
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    Default

    All posted lisp are free.
    I will never stop to thank those who wrote them.
    Marco

  9. #9
    Senior Member marmo's Avatar
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    Default

    The triangle with the command DTM is accurate. Thus, such as the creation of the solid with the M2S lisp.
    The mesh creation or the Loft is approximate.

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    Default

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    Hello,
    Great method for triangulate a terrain, to complete, you can use Excel or the other one to create a script.
    1 - create an additional column and in this one types the following formula: ="_point "&E2&","&F2&","&G2 see image (cells value depend your table)
    Pascaldtm points.jpg
    2 - copy out your formula up to the last point
    3 - copy the column
    4 - in Autocad, in the line of command, paste your list and there you will see Autocad creating automatically your points.
    The only difference it is because later, I use an add-in in Autocad FLASHCDN but who and paying to it and I think it only for french autocad version.see link (http://www.delicad.com/autocad/flashcdn.htm or http://www.delicad.com/anglais/flashmnt.php)
    At least the method of Marmo has the advantage to be free.
    thanks Marmo
    Good luck

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