The image is a dimensionally accurate
2D patent drawing of a metal framework from some years ago. These devices are often made by laser cutting a cylinder under numerical control. I am trying to build a 3D image of the metal cylinder with the plan wrapped onto its surface. We have an unwrap command un Rhino 7 but I am not seeing a wrap command. A 3dm file is attached.
I have Rhino 8 in case there is a solution there, but I haven;t yet begun to transition from 7.0, so.
Hello Pascal. Thank you – good to hear your (virtual) voice!
At some point yes, I will work from the drawing to produce a wireframe model. But I would be very interested to know how you did this one. Michael
trim your image with the lines you drew
create a plane at the back of the image
create a cylinder in rhino, delete the upper and lower faces
use FlowAlongSrf
Hi Michael - if you make a target circle the right size and then trim the flat image with the border curves that are in place,(EDIT: then ShrinkTrimmedSrf), you can Flow from the lower edge of the trimmed flat image to the circle.
The same process would apply if you trace curves on that flat picture - flow them the same way.
Many thanks for your time and help. For some reason, however, the FLOW command – or more likely, my setup for it – is producing odd results. In the first few attempts it would make a cylindrical object, but wallpaper it with the whole page of the patent, rather than the neatly split object I had defined. Guessing it was a trim problem of some kind, I re-started with a fresh PICTURE of the patent page, split it anew, and got the image shown above. Reminds us of a 45 rpm record from an antique jukebox. Once again, FLOW preferred the whole patent page to the trimmed figure showing only the framework of interest. Probably something very simple left out here. Attached is the 3dm.
Thank you again for your insights. Michael 45 rpm Disk.3dm (626.4 KB)
Hi Michael - - my fault, sorry - - I forgot to mention ShrinkTrimmedSrf after the trimming of the plane.
Make sure the plane to be flowed is vertical to the current CPlane and the target circle parallel to the CPlane.
