7 messages in com.googlegroups.sketchupissuesRe: Arc on flat surface
FromSent OnAttachments
tauricity17 May 2007 14:14 
Gaieus17 May 2007 14:33 
tauricity17 May 2007 20:26 
Dave R20 May 2007 03:44 
Gaieus20 May 2007 04:41 
Dave R20 May 2007 10:19 
Gaieus20 May 2007 10:37 
Subject:Re: Arc on flat surface
From:Gaieus (gai@gaieus.hu)
Date:05/20/2007 04:41:03 AM
List:com.googlegroups.sketchupissues

Dave, indeed, a new face is created in this case - as well as if you draw a circle partly on another face. And as in this latter case, intersecting helps make the (closed) arc or the circle be "part" of the original face they are placed on.

Still when there are a lot of overlaying arcs (or circles) they don't always intersect properly and you need to use the "old, hand drawing" method to trace intersection points and turn them into endpoints.

Gai...

On May 20, 12:44 pm, Dave R <drkr@gmail.com> wrote: It sounds to me as if, when you close the arc, you've got two faces in the same plane; the original one and the one inside the arc. Intersect with model will indeed eliminate the problem. Think of the intersect as cutting a hole in the larger face into which the small face just fits.

On May 17, 4:14 pm, tauricity <taur@gmail.com> wrote:

Hi all, I'm very new (second week) to SU, and have zero CAD or design knowledge, so please try to explain any answers like I'm 4 years old. I did look through a bunch of posts but didn't find the answer to my question.

I have a flat surface that I'm drawing a bunch of arcs on. However, when I get to a certain point and close an area with an arc, the flat surface goes crazy and some triangular parts disappear, some are sort of there, sort of not. When I orbit the model, the surface shimmers in or out near the area.

But when I highlight the surface, it gets those tiny blue highlight dots all over, which says to me that the surface should be there.

I've re-done the design a half dozen times, thinking that my arcs weren't on the surface (coplanar?), being careful to make sure the little things says "on face". No luck.

The only cure is not to close the offending arc, but I kinda want to.

Sorry, that's the best I can describe it.

Thanks