What command - to stitch 3D faces together? ANSWERED.

GrahamG
edited August 2021 in 3D Modeling

See attached image (as example) - How do I stitch faces together to get 1 mesh entity?
In the attached example all the triangles are independent faces...

Comments

  • Hi GrahamG,

    Try DMSTITCH

    Kin

  • AFAIK
    If you have 3D Faces, you have to convert them to Regions first.
    (Select - Create Region)

    Then you can stitch them and will get a Solid
    (if it was a proper Volume)
    or a Surface.

    Which you should be able to convert/degrade to a Mesh, if needed.

  • Thanks Michael,
    Convert to Regions - then DMSTITCH did the ‘trick’…
    Saved as a surface.

    Best….

  • x4x
    x4x
    edited April 14

    Great but BricsCAD has a limit when runninf DMSTITCH i'm getting

    Too many entities selected.

    Entities in set: 181608

    : DMSTITCH
    Select entities to stitch or [Entire model/MOde/selection options (?)] <Entire model>:
    Opposite Corner:
    Entities in set: 181608
    Select entities to stitch or [Entire model/MOde/selection options (?)] <Entire model>:

    And it doesn't delete the original 3D faces!

  • You can go back a step get all the 3 XYZ points of a 3dFace and make a new TIN but you will have long 3dFaces made in convex areas.

  • Using the TIN command is indeed an option with entities that represent a topological surface. It has the advantage of being a lighter weight object than a surface, which gives better performance when you have a lot of points.

    If the entities are 3DFACEs, then using the create from Faces option will exactly map the edges of the 3DFACEs when creating the TIN. Once you have a TIN surface you can always use TINEXTRACT to generate a Surface or Solid.

    https://help.bricsys.com/en-us/document/bricscad/civil-tools/tin-surfaces/tin-surface-direct-modeling

    Jason Bourhill

    CAD Concepts Ltd

    cadconcepts.co.nz

  • Thanks Jason forgot about "TIN from 3dfaces", we used CIV3D so when sending DWG to an external company we always sent the CIV3D TIN and the original 3dfaces, so surfaces could be made in their Civil software. Never had a problem.

  • Thanks for the suggestions guy, still unable to make any progress:

    Tin command:

    Select entities to create TIN surface or [Import from file/place Points/create from Faces/create from point Cloud/create from point Groups/create from cOntours/create from Mesh/cLip polygon/selection options (?)]: F
    Select 3D Faces [selection options (?)]:
    Opposite Corner:
    Entities in set: 131409
    Select 3D Faces [selection options (?)]:
    Apply 3D Faces as edges and visibility [Yes/No] <Yes>: Y
    Error executing "TIN".

    No details on the error

  • Can you post even a part of the 3dfaces dwg to test. All of it is best.

  • Was the 3d faces from a 3d scanner ? The faces appear to be a side on view, that may be why having problems as you are looking right though a plane of faces but see what is on a different plane behind. May need to twist the entire face objects so a surface can be made.

    I did something for tunnel walls where swapped around all the points XYZ so could view from front similar problem.

    I used rotate3d twice X & Y axis seemed to get a better picture but still was some crossing 3Dfaces. Screws up XYZ,

    When making the TIN from 3dfaces I am pretty sure will fill in the big hole. So need a pre boundary to remove faces, so get hole again.

  • ALANH, the Surveyor contractor supplied the DXF, IDK any other info about what they use.

    Anyway, they sent me STL files which seem to perform quite a bit better than the DXF 3D faces.

    I'll continue to have them supply STL's from now on.