Volume Centroid

Replies to This Discussion

Permalink Reply by Mateusz Zwierzycki on January 21, 2012 at 7:57am

I dont know how it is named in python, but with vb you have to first compute areaamassproperties. 

Private Sub RunScript(ByVal x As Brep, ByVal y As Object, ByRef A As Object)
A = rhino.Geometry.AreaMassProperties.Compute(x).Centroid

Permalink Reply by Giulio Piacentino on January 21, 2012 at 8:33am

Hi Richard,

That can be the same using RhinoCommon (module/namespace Rhino, as Mateus does):

import Rhino

if x:
    a = Rhino.Geometry.AreaMassProperties.Compute(x).Centroid

For more information on RhinoCommon, see here.

---

Using RhinoScript (make sure you right-click the component and choose 'RhinoScript usage'):

import rhinoscriptsyntax as rs
if x:
     a = rs.SurfaceAreaCentroid(x)[0] #the 0 value is the point, the other is precision

For more information about RhinoScript, see the _EditPythonScript command help file. Geometry functions in Python RhinoScript also work in GhPython (grips and some interface selection will not). RhinoScriptSyntax ends up calling RhinoCommon functions that you can read on you computer.

I hope this helps,

- Giulio
________________
giulio@mcneel.com

Permalink Reply by Richard Gomez on January 23, 2012 at 4:22am

many thanks :)

it worked so:

if rs.IsPolysurfaceClosed(sv):
massprop = rs.SurfaceVolumeCentroid(sv)
if massprop: rs.AddPoint( massprop[0] )