Fillet or chamfer 2d and automatically trim off corner?

Rhino
,
1

Trying to figure this out… how can I fillet or chamfer a 2d object & have the corner automatically trimmed off, like how chamfering works in 3d?

Only thing I’m finding is that is creates the fillet or chamfer as unconnected geometry. I’ve searched & tried a bunch of different things…

fillet-corner-2d

thanks

2

Then your _Fillet is probably set to command line option Trim=no

Furthermore there is also the _FilletCorners command

3

Hi - thanks -

Trim is definitely Yes.

FilletCorners returns “No kinks fount to fillet.”

4

i tried and it does not work, so it seems to be a bug, i can remember that it once did

edit: @Andrew_Turner i might have remembered it wrong, it very well could be that it does not fillet the surface but that it indeed just creates a curve to trim the surface then… sorry for the misleading thoughts.

1 Like
5

I think the OP is referring to a planar surface, not to a curve.
Don’t know if there’s something to do that …

6

Yes - a planar surface.

What is the Trim command for, then?

[edit] It appears to work on separate lines, but not two edges of the same surface (below)… still experimenting…
[edit 2] FilletCorners works, but we may not want to use the same radius or fillet all corners.

corners

7

If you’re talking about the Trim option of the Fillet command, it’s to trim the curves by the fillet arc.
Fillet only works on curves (or surface edges), AFAIK.
Actually I only know about Rhino 6.
Don’t know what Rhino 7 or Rhino 8 WIP can do … sorry.

But you can certainly trim the surface using the Trim command:
you have to draw the fillet arc(s) first by the Fillet command and then Trim the surface with the fillet arcs. ( Same for Chamfer using the lines ).
It’s not a one-shot thing, though.

1 Like
8

:man_facepalming: I missed that. I believe @pascal made a script for it a while back, but I can’t seem to find it.

9

Well … I also used to use a couple of raw, old VBScript scripts for that. :neutral_face:

Here they are

sub main
pre=rhino.firstobject
ok=rhino.command("fillet t=n")
if not ok then exit sub
li=rhino.firstobject
if li=pre then exit sub
rhino.unselectallobjects
rhino.selectobject li
rhino.command"trim u=y"
rhino.deleteobject li
end sub

main

sub main
pre=rhino.firstobject
ok=rhino.command("chamfer t=n")
if not ok then exit sub
li=rhino.firstobject
if li=pre then exit sub
rhino.unselectallobjects
rhino.selectobject li
rhino.command"trim u=y"
rhino.deleteobject li
end sub

main

Looks like only the command name is different … :grin:

HTH

1 Like
10

Yep, here’s one -
FIlletSrfCorner.py (9.1 KB)
Click near the corner. Also works on non-planar corners, I think.

To use the Python script use RunPythonScript, or a macro:

_-RunPythonScript "Full path to py file inside double-quotes"

-Pascal

2 Likes
11

Thanks Pascal - that works.

I didn’t get it to work on a non-planar corner, but for now that’s fine!