How to show the path of a moving body?

[netsonicyxf]

How to show the path of the moving body as shown in the image by using Rhino and/or Grasshopper and/or other plugins (such as Bongo, Kangaroo)?

1.3dm (74.4 KB)

[DanielPiker]

Plugin or Rhino Tool for Swept Volumes (Sweeping SOLID Bodies, not Curves)?

Hello, has anyone ever heard of a plugin that can create a “volumetric sweep” by sweeping a solid or mesh along a curve? It’s quite a different problem from “solid-sweep surface along curve”, which actually only uses the border of the surface–I’ve tried it. CATIA apparently can do this, e.g. here is a 2D simplification of what we want to do: [image] Also, SolidWorks and NX can do swept volumes, but only with “analytical geometry”, which they define as lines and circular arcs (what, Bezier cur…

[Joseph_Oster]

This thread was on that subject, though I don’t think we found a definitive solution at the time:

Plugin or Rhino Tool for Swept Volumes (Sweeping SOLID Bodies, not Curves)?

I got distracted with SUnion failure and forgot to post this - it gives a better view of the complexity of the resulting shape, but doesn’t ever “get there” as a smooth solid.: [sunion_2018Apr8a] vol_sweep_2018Apr8b.gh (10.3 KB) [vol_sweep_2018Apr8b2]

[encephalon]

another attempt of that sort

"Unsolvable" geometric problem

I got a strange question. The goal is to push a cylinder through a block while it gets rotated by 90°. As it is not possible to sweep a surface, I can only get near to the correct result. See this: [image] The cylinder cap makes an interesting surface, which shall be exact (and not as in my approach). Any ideas? CP_CylinderChallenge.3dm (255.1 KB)

i guess many instances of the movement and using this new tool to solidify the geometry could work

[martinsiegrist]

If the body has rotational symmetry, it should not be very difficult, no?

1.3dm (159.2 KB)

[encephalon]

looking at your example once more, i assume its for some logic part of an exam? what do you actually want to show? if its just the path itself the doublecone takes rolling off of the surface you might as well draw 2 circles from the focal point of the object.

[netsonicyxf]

The body may be any shape.

1. First I want to know how it lies down on the plane, that’s why I think it may need Kangaroo.
2. Use GH or other plugin such as Bongo to move the body and show the path when it moves.

[encephalon]

in case of other more complex or less predictable behaviours you would need some dynamics yes, kangaroo will help, tracing the path might be feasible either, there are examples of both in the forum if i am not mistaken, i personally use less involving software for this matters like c4d, less involving because its quicker to set up, but the limit is not the sky in that case at least not without being similar involved as grasshopper.

maybe @DanielPiker has an example where both dynamics and path tracing are combined.