Offset normal to Surface

[AllenJessup]

This had been discussed so long that the original post aren't even archived.

We need the ability to offset a surface. Landfill caps and certain types of excavation or fill need to be calculated this way. I WAS doing this in AutoCAD back in the 90's using a program called QuickSurf. Fifteen years ago I tried to write a lisp to do this using the NOR function in the Geometry Calculator. But, not being a programmer, I never finished it. So I believe this it doable but I don't know how much work it would take.

Allen

[AllenJessup]

See: https://groups.google.com/forum/#!searchin/autodesk.land-desktop3/offset$20surface$20normal/autodesk...

[Karsten.Saenger]

Hi Allen,

is this about "growing" a surface, like a blowing up a ballon versus just offset it in z-direction, which is alread possible?

Technically said offset each surface triangle in direction of the normal vector.

I have quite a view request for such a function.

Regards,
Karsten.

[AllenJessup]

Yes. Growing a surface. No. It's not possible yet.

Allen

[Karsten.Saenger]

Thanks! What I meant what is possible is to raise/lower the surface, which is only along the z-direction.

Karsten.

[AllenJessup]

To Change the Elevation of a Surface
http://help.autodesk.com/cloudhelp/2015/ENU/Civil3D-UserGuide/files/GUID-DF02E0B2-851C-4A24-A470-910...

This area isn't meant for support. If you have any more questioins about this. Please post to the Civil 3D forum.

[BernhardBicking]

Hello @Anonymous,

The Funktion to offset DGM in perpendicular (not z) direction would be very helpful. But this feature does not exist. 

I wait for this about 7 Years.

The programmers are probably not able to make something challenging.

Spoiler

I (and many others) waiting.

[martin.folber]

Hi guys,

this is must have feature when we calculate earthworks. Similar to AutoCAD Command SURFOFFSET or PUSH in 3DS Max

Thanks

Martin

[BernhardBicking]

We need more supporters to this advance to

B. Bicking

[autoMick]

This issue has popped up in a few threads lately...

The objective is to map the perpendicular distance from one surface to another. This would be similar to a volume surface but the distance would be from the centre of each 'base' surface triangle and would be perpendicular (normal) to this triangle face. There could be a few options on how to represent these distances: e.g. 

- 'display at base surface'

- 'display at distance centre point'

- 'display at comparison surface'

Hopefully this makes sense.

- Mick

[VCivil3D]

This would be wonderfull!

[Anonymous]

Yes this is a "must have"!!!

[Anonymous]

I guess I see the benefit of this but In most of my work a 3:1 slope is the maximum, and copying the surface down 1.06 feet ensures a minimum of 1' offset.  Or just copying down 1' gives a 0.948 minimum offset.

[BernhardBicking]

But that only works for constant upgrades. If there are Different slopes in a DGM no longer uses this approach.

[Anonymous]

has anyone solved this problem, trying to determine the surface after adding 2' of fill perpendicular to the current slope and not finding any easy way. Unless my surface is a constant slope, which it is not.

[Anonymous]

Who here is the best at calculus?

If I have a surface, and I know the average slope, can I use trig to calculate the vertical offset to mimic a true offset of one foot, like I did on 1-28-16 post?  I have to believe it will be close enough.

I prospector list the surface properties.  Under the Statistics tab and under Extended, it lists a Mean grade/slope.  If this slope is used as in m example above of 33.333%, a vertical copy of 1.06 feet is equivalent to a one foot offset.  This has to be close enough.

[Anonymous]

For planing waste disposal sites and heeaps it is necessary to raise and lower copies of dtms.

I know there are ways to lower and raise dtms, but what these functions do, is to lower an raise the z-ccordinate of a vertex.

What we need is, to be able to set up a thickness and therefore we have to offset the triangles.

Cheers, Frederic

[troma]

Duplicate?

http://forums.autodesk.com/t5/autocad-civil-3d-ideastation/offset-normal-to-surface/idi-p/5671452

[peterfunkautodesk]

This is a duplicate with http://forums.autodesk.com/t5/autocad-civil-3d-ideastation/offset-normal-to-surface/idi-p/5671452 

Cheers,

Peter Funk

Sr. Product Manager

Autodesk, Inc.

[scheel]

It may be that this is duplicate, but it's really important for dump/landfill management.

And there is nothing happened.

But over all it's a very good idea.

Cheers

Thorsten Scheel

[Anonymous]

I previously used Carlson's Civil Suite and it had this feature. I used  it often, predominantly in landfill applications. I'm surprised this feature is not available in C3D.  It woiuld be a very helpfull.