Curved surface flagged as planar

Replies to This Discussion

Permalink Reply by Olivier Suire on November 9, 2016 at 7:50am

...and it still is the case in Rhino WIP with Grasshopper 1.0.0004

Anybody in here ?

Permalink Reply by Tom Svilans on November 9, 2016 at 8:03am

Set I to False on the Planar component.

Permalink Reply by Mateusz Zwierzycki on November 9, 2016 at 7:58am

You clearly do a poor job with reading the component descriptions.

Permalink Reply by Tom Svilans on November 9, 2016 at 8:03am

"Limit planarity test to interior of trimmed surface." isn't the clearest thing, if you're not familiar with it.

Permalink Reply by Olivier Suire on November 9, 2016 at 8:42am

Nope : even the interior of this trimmed surface is not planar

Permalink Reply by Olivier Suire on November 9, 2016 at 8:54am

Hi Tom,

Thanks for the idea.

I suppose there are even other smart ways to do it, but I sure would like this component to be reliable :)

Cheers,

Permalink Reply by Olivier Suire on November 9, 2016 at 8:41am

Hi Mateusz,

Was that for me ?

"Test whether a surface is planar" : what am I supposed to understand ?

Permalink Reply by Mateusz Zwierzycki on November 9, 2016 at 8:56am

The interior of the surface is non-planar-ish here, also the definition of planarity changes together with the document unit tolerance. Other factor which could alter the test results is the shape of the opening (long and thin object).  There is no such thing like the proper planarity definition once you start messing with floating point error...

I guess the best option for you would be to get the brep wires, join them, select the one edge with the largest bounding box and then use the curve planarity test.

Permalink Reply by Olivier Suire on November 9, 2016 at 9:13am

Hi Mateusz,

Non planar-ish ? Floating point error ? Shape of the opening ?

Come on, it's as flat as Kim Kardashian's rump !

This is just a bug.