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How to create a low-poly object in Onshape

vikram_koli595vikram_koli595 Member Posts: 31 EDU
edited January 2021 in Community Support
I would like to create these types of low poly shape in Onshape. It seems difficult to model because all of the faces point in random directions. Any help would be accepted. Thanks!

Best Answers

  • Options
    MichaelPascoeMichaelPascoe Member Posts: 1,713 PRO
    edited January 2021 Answer ✓
    Here is one approach you might try:
    • Sketch the base
    • Sketch front plane points (or another custom plane)
    • Sketch side plane points (or another custom plane)
    • Fit spline one line at a time
    • Fill each triangle
    • Fill the base
    • Shell the faces that you want to be left open
    If you do these kinds of parts a lot, consider having a custom feature made for this.



    Learn more about the Gospel of Christ  ( Here )

    CADSharp  -  We make custom features and integrated Onshape apps!   cadsharp.com/featurescripts 💎
  • Options
    MichaelPascoeMichaelPascoe Member Posts: 1,713 PRO
    Answer ✓


    Learn more about the Gospel of Christ  ( Here )

    CADSharp  -  We make custom features and integrated Onshape apps!   cadsharp.com/featurescripts 💎
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    Evan_ReeseEvan_Reese Member Posts: 2,064 PRO
    edited January 2021 Answer ✓
    check out the Convex Polyhedron feature by @konstantin_shiriazdanov.

    Also, a note for the workflow above: you can loft a straight line to a point, and skip the splines, since you can use the edge of the loft before. (pro tip: Usually, this would make your UV curves all converge at the point, but since it's planar, Onshape recognizes that builds it as a trimmed rectangle).
    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io

Answers

  • Options
    MichaelPascoeMichaelPascoe Member Posts: 1,713 PRO
    edited January 2021 Answer ✓
    Here is one approach you might try:
    • Sketch the base
    • Sketch front plane points (or another custom plane)
    • Sketch side plane points (or another custom plane)
    • Fit spline one line at a time
    • Fill each triangle
    • Fill the base
    • Shell the faces that you want to be left open
    If you do these kinds of parts a lot, consider having a custom feature made for this.



    Learn more about the Gospel of Christ  ( Here )

    CADSharp  -  We make custom features and integrated Onshape apps!   cadsharp.com/featurescripts 💎
  • Options
    MichaelPascoeMichaelPascoe Member Posts: 1,713 PRO
    Answer ✓


    Learn more about the Gospel of Christ  ( Here )

    CADSharp  -  We make custom features and integrated Onshape apps!   cadsharp.com/featurescripts 💎
  • Options
    Evan_ReeseEvan_Reese Member Posts: 2,064 PRO
    edited January 2021 Answer ✓
    check out the Convex Polyhedron feature by @konstantin_shiriazdanov.

    Also, a note for the workflow above: you can loft a straight line to a point, and skip the splines, since you can use the edge of the loft before. (pro tip: Usually, this would make your UV curves all converge at the point, but since it's planar, Onshape recognizes that builds it as a trimmed rectangle).
    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Thanks for the help! This is a great solution. I will model one of these shapes and will post the end result in the chat! Thanks again!
  • Options
    MichaelPascoeMichaelPascoe Member Posts: 1,713 PRO
    That's pretty sweet.

    Evan_Reese said:
    check out the Convex Polyhedron feature by @konstantin_shiriazdanov.

    Also, a note for the workflow above: you can loft a straight line to a point, and skip the splines, since you can use the edge of the loft before. (pro tip: Usually, this would make your UV curves all converge at the point, but since it's planar, Onshape recognizes that builds it as a trimmed rectangle).


    Learn more about the Gospel of Christ  ( Here )

    CADSharp  -  We make custom features and integrated Onshape apps!   cadsharp.com/featurescripts 💎
  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    One question, When you say Loft a line to a point, do you mean this?

  • Options
    Evan_ReeseEvan_Reese Member Posts: 2,064 PRO
    yep! that's exactly what I mean. I also realized that I could pretty easily modify my Freeform Spline feature to be a 3D points feature, which I've wanted from time to time, so I just converted it real quick. You can add it here to make your points. I'll make an icon and tidy it up sometime soon and post in the main group, but it seems to work as-is.
    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Thanks for the resources! I will first finish the model and then take a glimpse into computer-generated models. Thanks
  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Another question. It keeps giving me an error once I have made a full rotation of bottom lofts. I'll include a gif.

  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Oh Fixed The problem. Here is how. 
  • Options
    bruce_williamsbruce_williams Member, Developers Posts: 842 PRO
    edited January 2021
    I believe that is from 'non-manifold' geometry. The surface cannot be joined at a single point. Once you create a new surface and then 'add' final it creates a full edge joint.

    You may follow this thread and related.

    www.accuratepattern.com
  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Thanks for all of the help! I have finished the model. Here are some pics and a gif

  • Options
    MichaelPascoeMichaelPascoe Member Posts: 1,713 PRO
    Nice work!

    Learn more about the Gospel of Christ  ( Here )

    CADSharp  -  We make custom features and integrated Onshape apps!   cadsharp.com/featurescripts 💎
  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Thanks!
  • Options
    Evan_ReeseEvan_Reese Member Posts: 2,064 PRO
    Nice! looks good.
    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
  • Options
    vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Thanks!

  • Options
    roman_jurt190roman_jurt190 Member Posts: 32 EDU
    Just used a Variant of this workflow and thought I'd share it:  

    - Make a base-sketch with lines (as a start for the lofts)
    - Make 3D-Points by using @Evan_Reese  3D Points FS 
    - Use lofts "line to point" (ending each feature with [shift]+[return] opens a new loft-feature immediately!)
    - Make a paper-thick sheetmetal

    This process gives you free, fast and live 3d-manipulation of all points at the same time.
    Adding new points to the "mesh" is still a huste, though.

    This is potentially a fast process for prototyping and packaging:)

    Have a look:
    https://cad.onshape.com/documents/bbec0b3d977212a847973244/w/fcc4f6d8f58fe6b605d9e91e/e/4d91b54655dd25f7b6a89c92






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