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How to create a low-poly object in Onshape

vikram_koli595vikram_koli595 Member Posts: 31 EDU
edited January 25 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

  • MichaelPascoeMichaelPascoe Member Posts: 557 PRO
    edited January 25 Accepted 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.


  • MichaelPascoeMichaelPascoe Member Posts: 557 PRO
    Accepted Answer

  • Evan_ReeseEvan_Reese Member Posts: 986 PRO
    edited January 25 Accepted 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
    Instagram: @evan.reese.designs

Answers

  • MichaelPascoeMichaelPascoe Member Posts: 557 PRO
    edited January 25 Accepted 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.


  • MichaelPascoeMichaelPascoe Member Posts: 557 PRO
    Accepted Answer

  • Evan_ReeseEvan_Reese Member Posts: 986 PRO
    edited January 25 Accepted 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
    Instagram: @evan.reese.designs
  • 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!
  • MichaelPascoeMichaelPascoe Member Posts: 557 PRO
    That's pretty sweet.

    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).

  • vikram_koli595vikram_koli595 Member Posts: 31 EDU
    One question, When you say Loft a line to a point, do you mean this?

  • Evan_ReeseEvan_Reese Member Posts: 986 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
    Instagram: @evan.reese.designs
  • 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
  • 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.

  • vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Oh Fixed The problem. Here is how. 
  • bruce_williamsbruce_williams Member, Developers Posts: 773 PRO
    edited January 25
    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
  • 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

  • MichaelPascoeMichaelPascoe Member Posts: 557 PRO
    Nice work!
  • vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Thanks!
  • Evan_ReeseEvan_Reese Member Posts: 986 PRO
    Nice! looks good.
    Evan Reese / Principal and Industrial Designer with Ovyl
    Website: ovyl.io
    Instagram: @evan.reese.designs
  • vikram_koli595vikram_koli595 Member Posts: 31 EDU
    Thanks!

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