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  1. #1
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    Default How to read 3DSolid in DXF files

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    Hi
    When i do for example a cilinder and save like DXF, appears:

    3DSOLID

    And a code that i want to decode, Can somebody help me?

    Where can i find the description

    Code:
    0
      3DSOLID
        5
      154
      330
      1F
      100
      AcDbEntity
        8
      0
      100
      AcDbModelerGeometry
       70
           1
        1
      mnmoo mi m mi          
        1
      ni ^ *+0;:,4 ^ *+0\^ [ nh ^ LR nmqoqnqgmo QK o  
        1
      mjqlffffffffffffff fqfffffffffffffffj:rooh n:rono 
        1
      >,27:>;:- {rn rn _nn mnmqoqnqgmo |
        1
      =0;& {rn rn {rn {m {rn {rn |
        1
      3*2/ {rn rn {rn {rn {l {n |
        1
      ,7:33 {rn rn {rn {rn {rn {k {rn {m |
        1
      9><: {rn rn {rn {j {i {l {rn {h 90-(>-; ,6183: |
        1
      9><: {rn rn {rn {g {f {l {rn {no 90-(>-; ,6183: |
        1
      300/ {rn rn {rn {nn {nm {k |
        1
      <01:r,*-9><: {rn rn {rn kqnkfhioofmlojhoj gqmjkjohffmnfjjkhl kqgmhofgojligofhji o o n no o o n V V o n no 90-(>-; V V V V |
        1
      9><: {rn rn {rn {rn {nl {l {rn {nk 90-(>-; ,6183: |
        1
      300/ {rn rn {rn {rn {nj {j |
        1
      /3>1:r,*-9><: {rn rn {rn kqnkfhioofmlojhoj gqmjkjohffmnfjjkhl o o o rn rn o o 90-(>-;@) V V V V |
        1
      300/ {rn rn {rn {rn {ni {k |
        1
      <0:;8: {rn rn {rn {nm {nm {nj {nh -:):-,:; {i {rn |
        1
      300/ {rn rn {rn {rn {ng {g |
        1
      /3>1:r,*-9><: {rn rn {rn kqnkfhioofmlojhoj gqmjkjohffmnfjjkhl fqijknfinohlinfjnn o o n n o o 90-(>-;@) V V V V |
        1
      <0:;8: {rn rn {rn {nj {nj {nm {nh 90-(>-; {f {rn |
        1
      <0:;8: {rn rn {rn {ni {ni {ng {nf -:):-,:; {nn {rn |
        1
      :;8: {rn rn {rn {mo o {mo iqmglngjlohnhfjgim {nj {mn 90-(>-; _h *1410(1 |
        1
      <0:;8: {rn rn {rn {ng {ng {ni {nf 90-(>-; {nl {rn |
        1
      :;8: {rn rn {rn {mm o {mm iqmglngjlohnhfjgim {ng {ml 90-(>-; _h *1410(1 |
        1
      ):-+:' {rn rn {rn {nh o {mk |
        1
      :336/,:r<*-): {rn rn {rn kqnkfhioofmlojhoj gqmjkjohffmnfjjkhl o o o rn no o o n V V |
        1
      ):-+:' {rn rn {rn {nf o {mj |
        1
      :336/,:r<*-): {rn rn {rn kqnkfhioofmlojhoj gqmjkjohffmnfjjkhl fqijknfinohlinfjnn o o n no o o n V V |
        1
      /061+ {rn rn {rn nkqnkfhioofmlojhoj gqmjkjohffmnfjjkhl o |
        1
      /061+ {rn rn {rn nkqnkfhioofmlojhoj gqmjkjohffmnfjjkhl fqijknfinohlinfjnn |
      100
      AcDb3dSolid
      350
      157
    Last edited by Tiger; 6th May 2009 at 11:30 am.

  2. #2
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    Default

    josefo:

    Welcome to the CADTutor forum. You've posted your question in a rather odd location (Introduce yourself). None-the-less, as regards your question, you must start with the basics. Read this first:

    http://www.autodesk.com/techpubs/aut...ure_dxf_aa.htm
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  3. #3
    Quantum Mechanic ReMark's Avatar
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    Default

    Despite being written about Release 12 this extensively detailed article covers the structure of a DXF file.

    http://www.martinreddy.net/gfx/3d/DXF12.spec
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  4. #4
    Quantum Mechanic ReMark's Avatar
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    Default

    Another article from AutoDesk regarding DXF file structure (Release 2000):

    http://www.autodesk.com/techpubs/aut.../dxf/index.htm
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  5. #5
    Super Moderator Tiger's Avatar
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    Default

    I moved your question to a more appropraite forum, and added code-tags to your post to make it more readable. In the future, please post your questions in the most appropriate part of the forum.
    MTJIGSTRING = BAZINGA

  6. #6
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    Default

    I recall some attempts at decoding the dxf reference of 3dSolids. Here is a thread hinting at that process from the VBA side of things. http://www.theswamp.org/index.php?topic=16754.0

    Another option is to analyze the solids via the SAT file acquired via an acisout command. Here are a couple of links that discuss the capabilities of that option.

    http://www.theswamp.org/index.php?topic=25855

    and
    http://www.theswamp.org/index.php?topic=25614
    towards the bottom.

  7. #7
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    Default

    Hi there,
    I have a sample dxf file that includes a Box, a Cylinder, a Pyramid, a Sphere, a Torus, a Cone, and a Widget. I have loaded that ASCII file in MATLAB and looked at the ENTITY part of the dxf reference about 3dSolids to learn how to extract some details of objects. I couldn't find any group codes indicating the coordination of those objects. Could you please tell me in which part of the loaded dxf file I should find those details?
    Best Regards,
    Hamid.

  8. #8
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    Default

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    Hi,
    I have forgotten to say that the objects are of type 3dSolid.
    1) Does anybody know how to use group code value 350 that is a Soft-Owner ID/handle to history objects?
    2) Does this handle refers to the point where additional data about entity 3dSoid objects are stored?
    Please point me to the right froum where I can ask my questions if they are irrelative to the froum contents. Thanks.

    Best Regards,
    Hamid.

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