Mesh eval (missing mesh parameter)

I was trying to use the mesh eval component, but it asks for a mesh parameter (which doesn't exist). I've tried multiple inputs, but none convert to a mesh parameter. Has anyone successfully used this component?

Replies to This Discussion

Permalink Reply by David Rutten on May 14, 2013 at 7:50am

Mesh CP will create a Mesh Parameter. Mesh parameters are complicated, they have a face index and then barycentric coordinates for within that face. And the coordinates have to make sense both for triangles and quads.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Javier Vizoso on May 14, 2013 at 8:47am

Thanks David!

Permalink Reply by Robert Vier on October 8, 2013 at 4:58am

Hi David,

this seems to be broken for unwelded meshes, I just forgot to tell until I tried again today.

Rhino crashes with a 'Send Error Report' Message, nothing else, as soon as I plug in the parameter into the eval component.

If I weld the mesh before, it works.

best,

robert

PS the internalized values in Add-components still vanish sometimes, sometimes they dont. either when copy/pasting the components or when saving and reopening.

Permalink Reply by Robert Vier on October 8, 2013 at 5:04am

another thing regarding the eval Mesh component - the color output yields null for my colored mesh, the others work fine.

both for my karamba mesh, as well as an arbitrarily coloured mesh plane.

thanks a lot,

best

Permalink Reply by Sahand Ahmadian on May 30, 2014 at 2:27pm

Hey Rob!

I guess I read David say somewhere that this frustrating color problem was an issue with the current release of rhinoCommon, so I came up with a quick and dirty hack for the time being.

The trick is to make a new mesh and replace its normals with the color from the old mesh, and then evaluate that. It will make an invalid mesh, but will do its job for this purpose with no problem.

Check the attachment.

Cheers.

Attachments:

MeshEvalColors.gh, 11 KB

Permalink Reply by Alex Webb on November 16, 2014 at 12:00pm

This is fantastic- thanks!

Permalink Reply by ekaggrat singh kalsi on January 26, 2015 at 6:42pm

great works on a bitmap mesh also

Permalink Reply by Robert Vier on May 26, 2014 at 9:53am

Hi David,

any chance you could fix this in a future release? my rhino still crashes on some cases. couldnt really find out what the driving factor for failure is.

in another case the mesh eval just gave wrong results it seemed.

see attached file!

thanks a lot,

best

Robert

Attachments: