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Grading not working around corners

9 REPLIES 9
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Message 1 of 10
MapleWalnutIceCream
1039 Views, 9 Replies

Grading not working around corners

I have a parking lot and I am using gradings to make the surface. I noticed that around some of the corners it doesn't follow the feature line curve. Any ideas? I have included a picture. The curve on the left works and the one on the right not.
9 REPLIES 9
Message 2 of 10
Anonymous
in reply to: MapleWalnutIceCream


It does not follow curves.  It attaches to
nodes.  Select your curves and notice that there is a node where you have
existing triangles. Just add extra nodes with the included
tools.

 

Bill

 

 


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
I
have a parking lot and I am using gradings to make the surface. I noticed that
around some of the corners it doesn't follow the feature line curve. Any
ideas? I have included a picture. The curve on the left works and the one on
the right not.
Message 3 of 10

Thanks. I found that exploding the feature lines into 3dpolys and then remaking them into feature lines also works ok, but not as smooth.
Message 4 of 10

Thanks. I found that exploding the feature lines into 3dpolys and then remaking them into feature lines also works ok, but not as smooth.
Message 5 of 10
Anonymous
in reply to: MapleWalnutIceCream


Feature lines can be curves but polys cannot. 
Use the correct tools for the job and add nodes with the FL tools.

 

Bill

 


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
Thanks.
I found that exploding the feature lines into 3dpolys and then remaking them
into feature lines also works ok, but not as smooth.
Message 6 of 10

How are you adding the information to the surface? Check your mid-ordinate distance...and make it SMALL.
Matthew Anderson, PE CFM
Product Manager
Autodesk (Innovyze)
Message 7 of 10

I didn't add the feature lines to the surface as breaklines. Your right to make that small.
I made gradings and set them to automatically produce a surface from them. I set their tesselation distance to 1. It seems to work sometimes. Some of my feature lines where broken at the PC which may have led to this problem. Joining them didn't seem to fix all of them.

I shouldn't need to add nodes to the curve of a feature line Bill. That is what the tesselation setting is for. But it probably is a good work around.
Message 8 of 10
Anonymous
in reply to: MapleWalnutIceCream


One last question.  Have you tried to use
Feature Lines and their tools and use them as breaklines?  Doing items like
in your supplied .png would be a snap without using grading.

 

BTW, I'll take a double dip cone.

 

Bill


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
I
didn't add the feature lines to the surface as breaklines. Your right to make
that small. I made gradings and set them to automatically produce a surface
from them. I set their tesselation distance to 1. It seems to work sometimes.
Some of my feature lines where broken at the PC which may have led to this
problem. Joining them didn't seem to fix all of them. I shouldn't need to add
nodes to the curve of a feature line Bill. That is what the tesselation
setting is for. But it probably is a good work
around.
Message 9 of 10

Yeah, we make our mid-ordinate 0.01. It follows obediently around curves (for the most part).



Rick
Thanks,
Rick
coauthor Mastering Civil 3D 2012
I blog at http://simplycivil3d.wordpress.com
Message 10 of 10

Joining shouldn't make a difference difference only in that the grading object should only calculate once at that location, instead of twice (end of one featureline, beginning of the other)

The lack of data on the curve is control by the tessellation and mid-ordinate distances...
Matthew Anderson, PE CFM
Product Manager
Autodesk (Innovyze)

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