Area Calculations: Mesh vs. Polysurface

All-

I'm hoping to use GH to automate area calculations for an urban design project... I have a series of imported geometry (buildings, etc) which arrive as either 'mesh' or 'polysurface' objects. My problem lies within the 'mesh' objects.

I've setup a series of XY planes with cut through every object in the scene. Each cut then kicks an area calculation out to a spreadsheet. However, 'mesh' objects are not BReps and are thus not valid for the 'Sec (BRep / Plane)' component.

Does anyone know how I can convert all of my 'mesh' objects into a solid/BRep?

This does not need to be done within Grasshopper. Rhino would be fine for converting.

Thanks a million... this would make my life -so- much easier!

Attachments:

JMP_Area_Calc_error.3dm, 811 KB
JMP_Area_Calc.ghx, 783 KB

Replies to This Discussion

Permalink Reply by Daniel Piker on October 11, 2009 at 11:13am

In this old thread I posted a vb script for contouring meshes. Maybe you can take areas directly from that without converting into Breps at all.

Permalink Reply by David Rutten on October 11, 2009 at 11:15am

If your mesh contains only a few faces, you can use the _MeshToNurb command, and then the _MergeAllFaces command to clean up the result. If however your mesh is dense, then this approach will probably require too much memory and crash.

I can add a MeshSection component to Grasshopper if that helps. Or a Generic Section which accepts a range of different geometry types.

--
David Rutten
david@mcneel.com
Seattle, WA

Permalink Reply by J. Pyeatt on October 11, 2009 at 11:46am