Fillet goes the wrong way

[jbear0000]

I've been having a problem with the fillet command. When trying to fillet a polyline it often puts the curve in going the wrong way, see the attached images.

When I try to fillet with a 40' radius it works fine, but when I try to do a 35' radius or smaller it does it wrong.

UCS is set to world

I ran flatten on the polyline

I tried to reverse the polyline

I exploded it and joined it back together

Fillet trim mode is set to trim

None of that helped, it keeps doing this. Depending on where I click on the line it flips a different way, but won't do it correctly no matter where I click. If I explode it then it does it correctly, but I shouldn't have to explode every polyline in order to get the correct arc.

I'm using Civil 3D 2016 SP1.

[Patchy]

http://cadtips.cadalyst.com/polylines/reverse-enable-fillet

[jbear0000]

I guess you didn't read my entire post, particularly the part that said "I tried to reverse the polyline"

[pendean]

Pretty pictures: how about a DWG file and point to the two points you picked in the file so we can do wat you are doing. Thanks.

[jbear0000]

Here is a dwg file, just click anywhere and try using a 35' radius and you will see what it is doing.

[Anonymous]

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@jbear0000 wrote:

Here is a dwg file, just click anywhere and try using a 35' radius and you will see what it is doing.

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It's probably because one of your PL segments is an arc.

[pendean]

Like Jason said...

[jbear0000]

I know it is an arc, it needs to be, but it still shouldn't be doing the curve backwards. It works fine with a 40' radius, it works fine with a line and an arc, but not as a polyline and a 35' radius. Try it. So, why does it work with a 40' radius and not a 35' radius? If it was just the fact that it is a curve it would do it with both.

[Anonymous]

I broke the fillet at the intersection, tried to fillet it again and it work. Still don't understand why it wasn't working to begin with. 

[Anonymous]

There's always more than one way to skin a cat in AutoCAD, I would've drawn a circle using tangent tangent radius and trimmed the polylines, joined and moved on...

[Pointdump]

J,

Have you tried turning off High Quality Geometry?

Dave

[jbear0000]

Yes, I know, but when using Autoturn and having a truck turning template attached to that polyline and having to recreate it every single time I want to try a different radius takes much more time than just using the fillet command and expecting it to work the way it is designed to work.

[jbear0000]

I already have that turned off.

[tcorey]

Did you try it as an alignment? Will AutoTurn use a Civil 3D alignment? Autodesk Vehicle Tracking will. (I had to get that plug in there!)

[Pointdump]

J,

I'm not able to re-produce the problem. Recommend you update your service packs.

Dave

[Timothy_Sean_Hulbert]

Greetings,

Thank you for your recent forum post.  My name is Sean and I am more than happy to help you with this issue. I see from the thread that other members of the community have been working with you on this issue regarding your fillet going the wrong way on a polyline. I have seen this before, and generally explode the polyline as a work-around. I do realize how annoying that can be. Would you mind sharing the drawing?

I have subscribed to the thread though and will continue to monitor it should you need additional assistance. If you would like to communicate directly, you may do so at any time by sending me a private message in the forum.

[jmayo-EE]

Explode first. Join after fillet.

You should not be able to fillet an arc and line segment within a pline. I don't know why ur file allows that without getting the 'Cannot fillet between these two entities.' error at the command line...

Fillet between line and arc is permitted but not with in a pline.

[jbear0000]

Here is the dwg file with the lines that were giving me trouble.

[jbear0000]

It wasn't a polyline and an arc, it was 2 polylines. Exploding it is a poor solution. Especially if the polyline is very long, has a width, perhaps dimensions or hatch associated to it or has Civil 3D labels associated to it. All of that would be messed up by exploding it.

[Pointdump]

J,

"...just click anywhere and try using a 35' radius and you will see what it is doing."

"It wasn't a polyline and an arc, it was 2 polylines."

Sorry, I'm just not seeing the problem. I see A polyline, and as @Anonymous says, "Fillet between line and arc is permitted but not within a pline."

I've even tried drawing some polylines and filleting between them with different radii. Can you post a drawing with ONLY the two polylines that the problem shows up in?

Dave