what is the most efficient way to convert mesh faces into breps?

I used the following workflow to convert the faces in a mesh into individual brep surfaces so that I can calculate the surface area for each of them.

However, it took 2.7 minutes to process 14k mesh faces.

May I ask if there is more efficient way to do this?

Thanks.

Replies to This Discussion

Permalink Reply by David Rutten on June 21, 2017 at 4:08am

You can certainly cut out the middle man and just plug the curves directly into the area. Does that make an appreciable difference?

Permalink Reply by David Rutten on June 21, 2017 at 4:09am

Alternatively, for triangles there's (fast) alternative ways to calculate areas.

Permalink Reply by Grasshope on June 29, 2017 at 1:51am

Thanks, David. Getting the area of each face is the priority here, and the middle man "create surface by boundary lines" is not necessary here indeed.

Permalink Reply by David Rutten on June 29, 2017 at 2:12am

Just doing it all in C# allows you to get really efficient. The area of a triangle can be easily calculated using the cross product of two edges. The length of the vector cross product equals the area of the parallelogram (i.e. twice the area of the triangle).

Attachments:

quick_triangle_area.gh, 124 KB

Permalink Reply by Andrew Heumann on June 21, 2017 at 4:40am

There's also a "mesh area" component that is designed for this purpose - no conversion required.

However, if you need to convert to surfaces for other reasons, I think you'll find it's fastest to deconstruct your mesh faces into points and then use surface 4 pt to construct the surfaces directly. The Boundary Surface component you're using has to do a bunch of extra work that isn't any use to you in this content - that's what makes it slow.