centroid revised

Replies to This Discussion

Permalink Reply by David Rutten on July 15, 2011 at 4:11am

Hi Phillip,

 

how could I calculate the centroid without calculating the area?

 

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by phillip on July 15, 2011 at 6:29am

hmm. ok,  maybe a silly question.  i thought of converting the surface to a finite set of of points, to achieve an aproximation, since I am using the point only for testing a brep inclusion.

can you think of a more sufficent method?

files attached. thanks for your attention

 

Attachments:

• brep inclusion.3dm, 2.1 MB
• brepinclusion.gh, 13 KB

Permalink Reply by David Rutten on July 15, 2011 at 6:45am

Calculating areas and centroids is easy for triangles. I could make a low-quality representation of the surface as a mesh. But then the Rhino SDK also has functions for computing AreaCentroids for Meshes and closed planar curves.

 

I can make the AreaCentroid and VolumeCentroid components capable of dealing with Brep, Surface, Mesh and Curve data. We can then test to see if it's any faster.

 

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by phillip on July 15, 2011 at 7:04am

sounds good. meanwhile i´ll try some walk around methods.

thanks

Permalink Reply by kleerkoat on July 18, 2011 at 6:24am

so are you wanting to make sure that the point is inside the boundary?