From: Matadem
Good day.
How would one wrap around a shape in Moi3d?
I have a plane that I have to wrap around a 3d pentagon...to get the desired bend lines etc.
but how would one do this?
attached pic and file.
Tnx!
Attachments:
Wrap around.3dm
Image Attachments:
wa.JPG
From: Michael Gibson
Hi Matadem, one issue I see is your pentagon prism shape is a curved/warped surface and not made up of planar surfaces.
That's because of the twist between the profiles:
Is that warped shaping intentional? Because it will probably be a lot more difficult to process that.
- Michael
Image Attachments:
matadem_twist.jpg
From: Matadem
Good day.
Yes it is intentional...I would like to know what the process to get this accomplished as I do not know where to begin.
Tnx!
From: Michael Gibson
Hi Matadem, that unfortunately makes it significantly more complicated because I don't think those are developable surfaces.
How much accuracy do you require? Like how much deviation in surface area could be allowed?
- Michael
From: BurrMan
I was unclear on the type of wrap on this.
The "Shape" like this?
Or the actual object, which would "spiral" up and leave a gap....
If object, I will digress to Michael...
Image Attachments:
unclear wrap.jpg
From: Michael Gibson
Hi Matadem, is this attached close to what you are looking for?
- Michael
Attachments:
Wrap around2.3dm
From: Matadem
Yes that is the one..
So how is it done and how would it be done if the pentagon was not twisted?
Tnx1
From: val2
Here is my wrap around. I used the cplane picking each surface of the shape. then draw a line across it matching the plane as I went around the shape. then I cut into the shape with the lines.
Attachments:
wraparoundM.3dm
From: Michael Gibson
Hi Matadem,
re:
> So how is it done and how would it be done if the pentagon was not twisted?
The first step is to approximate the shape with planar faces. I drew in a diagonal line and then selected 3 lines at a time using Construct > Planar to build 2 planar triangles in place of each face:
Then select your object and use Transform > Orient to place it on one of the triangles.
Select it and run Edit > Trim and cut it with the triangle edges:
Then select the next piece, run Transform > Rotate > Rotate Axis. Pick the rotation axis along the edge that was just used to cut. Pick first reference point on the corner of the remaining piece and pick the second point anywhere on the next triangle.
That will rotate the remaining piece around the cutting edge so that it is in that triangle's plane and then repeat with trim, rotate axis, trim, rotate axis, until you've run out of pieces.
- Michael
Image Attachments:
matadem_wrap.jpg
