Edge tolerance problem Rhino.Inside Revit

Rhino.Inside Revit
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1

Hi guys, I was trying to get some geometries from rhino.inside revit from a file which was done without the absolute tolerance of 1 mm in Rhino as recomended.

I saw that @kike and @scottd had in other threads already addressed the problem. Especially I found this very interesting, Broken and/or shattered geometry result in Revit after baking - #6 by scottd, because of the possible work flow to follow to fix the geometry.

Specifically I am tying to export the geometry of a conceptual model ( which was done in metres with an absolute tolerance of 0.01) and these are the errors I get:

  1. Geometry contains out of tolerance edges.
    Resulting geometry may not be accurate.

  2. RhinoInside.Revit.GH: Input geometry is not valid.
    Distance from end of ON_Brep.m_T[0] to 3d edge is 0.512803. (edge tol = 0.000588638, trim tol ~ 0).
    Parameter name: Geometry

on the top of that I got this error on one big geometry:

grafik

There are many geometries in the file which have en edge problem and i would be able to identify and quickly fix them.
First thing is the problem related to any geometry which has edges that are beyond the tollerance of 1 mm, so any measure higher than 1,0 mm would produce an error?
any suggestion on a possible quick workflow to fix these imprecisions? and lastly would be possible to find a solution to brute force the process and somehow make invalid lenghts valid?

thanks for any advice

Federico

grafik
grafik1668×570 77.4 KB

2

Even though the document tolerance is set high you can still get edges smaller than the tolerance for a variety of reasons, particularly if you are doing Boolean operations.

3

Hi @Federico_Giacomarra,

In this case your problem is geometry is far from origin.
What is the distance limit from internal origin point for imported geometry in Revit? | Revit Products | Autodesk Knowledge Network

4

hi!
thanks for the quick reply! i have just checked the model, it is 540 m big (maximum extents of the slab). I moved it right on the origin. But still some of the geometries are failing, on the same geometry this is the error i got :

  1. RhinoInside.Revit.GH: Input geometry is not valid.
    Distance from end of ON_Brep.m_T[24] to 3d edge is 1.49592. (edge tol = 0.00149592, trim tol ~ 0).
    Parameter name: Geometry

on another one:

  1. Using SAT…
  2. Geometry contains out of tolerance edges.
    Resulting geometry may not be accurate.
  3. Gap between current and previous co-edges in BRepBuilder: check that edge-curve orientations and co-edge flipped-flags are correct.
  4. SAT operation failed.

another more:

  1. BRepBuilder cannot assign edge geometry for edge 8 due to inaccuracies between the coedge and its defining curve.

on these last 2 I can actually identify the edge which is failing, which is is great!

grafik

but on the first error 1. RhinoInside.Revit.GH: Input geometry is not valid.
Distance from end of ON_Brep.m_T[24] to 3d edge is 1.49592. (edge tol = 0.00149592, trim tol ~ 0).
Parameter name: Geometry

is the problem still relating to the distance from the origin? that would be quite hard to solve because it they are all pretty much close to the origin…

5

This means you have invalid geometry in the Rhino model, using _SelBadObjects on Rhino you will be able to found this bad guy and fix it.
This is a good resource about the topic.

1 Like
6

all right! I see I have never noticed that was the message for a badobject! anyway what is stil not clear to me is how should I rebuild the geometry with curve-edge orientation and co-edges problems and inaccurancies? is there a link I can check?

thanks again in advance!

7

There is a good post here about this topic.

1 Like
8

Thanks!!!