jiangrm

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Viewing 9 posts - 1 through 9 (of 9 total)
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  • in reply to: Unfold hull from the keel #44076
    Avatarjiangrm
    Participant

    For some reason the picture showing up in my recent posts was no longer the one I uploaded. Everything was right but after pressing “submit” button there came a picture I have never seen. Guess something in the backend went wrong.

    Please let me know your email, I can send the right picture. Thanks

    in reply to: Is this a bug? #44074
    Avatarjiangrm
    Participant

    The problem that sometimes occurs is caused by the traditional  (now largely outdated) combined aft / front view.

    In a next release we will move to  ‘proper’ aft and front view, this avoiding the entire issue. I hope (but can not promise) that this will be part of the next quarterly update.

    Perfect. Thanks

    in reply to: Is this a bug? #44069
    Avatarjiangrm
    Participant

    In front perspective but the design is symmetric by both X and Y axis.

    in reply to: Is this a bug? #44067
    Avatarjiangrm
    Participant
    in reply to: Is this a bug? #44065
    Avatarjiangrm
    Participant

    This is weird. I can’t upload a picture

    • This reply was modified 3 weeks, 2 days ago by Avatarjiangrm.
    in reply to: How to make it fully developable? #44059
    Avatarjiangrm
    Participant

    It will be a take-down lightweight canoe. In this case, my priority is material and simplicity of manufacturing. I wanted to use (ideally) a whole sheet of plastic film (very likely non-stretchable but possibly slightly stretchable) for the hull.

    Taping it in the middle is ok but not preferable as it increased the risk of leak.

    If calculating developability is possible from the curvature, is there any way to set developability as a constraint when moving the points around (like limiting the movement in one axis/plane)?

    in reply to: How to make it fully developable? #44053
    Avatarjiangrm
    Participant

    Hello, Jiangrm.

    A developable surface must continuously and smoothly curve in one direction, like the front and back halves of your vessel.

    The reason the middle is not developable is that it contains a crease edge, which, by definition, has a discontinuous surface curvature. It’s a crease.

    You can try removing the crease by selecting all the red edge segments there, then click on the Crease control in the Edge subgroup and see what that does. You may have to add some parallel Normal edges on both sides to smooth out the transition in that area.

    Hope this helps.

    Terry

    uncrease
    paper-hull2

    Removed crease of the edges in the middle, the whole hull turned red 😀

    Well my goal is to develop a canoe hull that is fully developable. It looks seemingly possible with the paper model but I couldn’t prove/disprove it geologically. Is there any way to do that?

    In any case if impossible, making hull in halfs is an acceptable compromise.

    Attachments:
    in reply to: How to make it fully developable? #44049
    Avatarjiangrm
    Participant

    Hello, Jiangrm.

    A developable surface must continuously and smoothly curve in one direction, like the front and back halves of your vessel.

    The reason the middle is not developable is that it contains a crease edge, which, by definition, has a discontinuous surface curvature. It’s a crease.

    You can try removing the crease by selecting all the red edge segments there, then click on the Crease control in the Edge subgroup and see what that does. You may have to add some parallel Normal edges on both sides to smooth out the transition in that area.

    Hope this helps.

    Terry

    Thank you Terry. I realized that later, cut it in half and it looks good.

    half-hull

    The other problem is I want to use a whole flat sheet to make the half hull. Is there any option to unfold it with the keel connected?

    unfold

    Attachments:
    in reply to: Unable to select control point #44048
    Avatarjiangrm
    Participant

    It seems you have enabled ‘Leak points’- a way to help you find and address leak points in the model./

    This feature hides all ‘normal’ points, and only shows points that are leak- in your case the one point.

    Leak points is a button in the ‘Hull display’ group on the Home tab.

    Thank you Maarten 😛

Viewing 9 posts - 1 through 9 (of 9 total)