how to creat a tringulate surface snaps on a curve feature line,see pic plz

[syria89]

i have a featur line where it has an arc
when i creatred a surface from a feature line
the tringulation doent cuve like the feature line
as a work around i did insert a PI
but is there a better way

[castled071049]

Triangulation lines are always just that... lines. You cannot get a curve from them. The best way to simulate a curve is to Insert Elevation Points on the curved feature line, type in the letter "I" to launch the Increment variable, specify a short distance of, say, 2', and you will have a lot of short lines that will come closer to looking like a curve. Edited by: castled071049 on Feb 4, 2010 11:41 AM

[Anonymous]

A different (I like this better) is, when you're adding those to your
surface as Standard breaklines, you will see a Mid-Ordinate distance value.
The smaller you make this number, the more tessellated your feature line
will be, thus it will more closely match your curve.

Doing it this way will not force you to modify the feature line which , in
my opinion, shouldn't be done if at all possible.

--
Matt Kolberg
Global CADD Systems - A division of Cansel

[Anonymous]

Would "minimize flat areas" help?

"Matt Kolberg" wrote in message
news:6330502@discussion.autodesk.com...
A different (I like this better) is, when you're adding those to your
surface as Standard breaklines, you will see a Mid-Ordinate distance value.
The smaller you make this number, the more tessellated your feature line
will be, thus it will more closely match your curve.

Doing it this way will not force you to modify the feature line which , in
my opinion, shouldn't be done if at all possible.

--
Matt Kolberg
Global CADD Systems - A division of Cansel

[Anonymous]

That tool is meant for something else. It may help a bit, but setting the
mid-ordinate distance to a smaller number, I believe, is the generally
accepted best practice just just this scenario.

--
Matt Kolberg
Global CADD Systems - A division of Cansel

"Robert" wrote in message
news:6330539@discussion.autodesk.com...
> Would "minimize flat areas" help?
>
> "Matt Kolberg" wrote in message
> news:6330502@discussion.autodesk.com...
> A different (I like this better) is, when you're adding those to your
> surface as Standard breaklines, you will see a Mid-Ordinate distance
> value.
> The smaller you make this number, the more tessellated your feature line
> will be, thus it will more closely match your curve.
>
> Doing it this way will not force you to modify the feature line which , in
> my opinion, shouldn't be done if at all possible.
>
> --
> Matt Kolberg
> Global CADD Systems - A division of Cansel

[Anonymous]

Yeah I have used minimize flat area for a pond radius and it was perfect.
Now as I think about it I probably set the mid ordinate to a .1 or something
:)

"Matt Kolberg" wrote in message
news:6330550@discussion.autodesk.com...
That tool is meant for something else. It may help a bit, but setting the
mid-ordinate distance to a smaller number, I believe, is the generally
accepted best practice just just this scenario.

--
Matt Kolberg
Global CADD Systems - A division of Cansel

"Robert" wrote in message
news:6330539@discussion.autodesk.com...
> Would "minimize flat areas" help?
>
> "Matt Kolberg" wrote in message
> news:6330502@discussion.autodesk.com...
> A different (I like this better) is, when you're adding those to your
> surface as Standard breaklines, you will see a Mid-Ordinate distance
> value.
> The smaller you make this number, the more tessellated your feature line
> will be, thus it will more closely match your curve.
>
> Doing it this way will not force you to modify the feature line which , in
> my opinion, shouldn't be done if at all possible.
>
> --
> Matt Kolberg
> Global CADD Systems - A division of Cansel

[keithknifer]

The mid-ord. distance is definitely the way to go. A quick tip though- if you have a neighboring FL with a stepped offset for a curb for instance, make sure the mid-ord. dist. is smaller than the horizontal offset between the two FLs or it will ignore it and just use the default dist. If I offset a FL say .1, I'll set the mid-ord. to .05 to be safe.

[BrianHailey]

That's a great tip! I'm gonna remember that one.

Brian Hailey
http://www.cad-1.com
http://www.AtYourDeskTraining.com
http://Civil3DPlus.wordpress.com

[syria89]

thanks for everyone