Area of closed polyline

[AndersDeleuran]

@benedict

if it is not planar, you can patch (command _patch) the polyline to get a approximate surface and get the surfaces area.

One can also triangulate the polyline and compute the area of the resulting triangles:

Mesh from closed polyline when it fails to make a mesh?

I usually triangulate closed non-planar polylines first, using Polyline.TriangulateClosedPolyline, and then generate a mesh from this. Works pretty well:

How to obtain the area of a single face of a mesh?

If you want to compute face areas of a RhinoCommon mesh you could also implement e.g. Heron’s formula, like so: import math def triangleArea(ptA,ptB,ptC): """ Compute area of triangle using Heron's Formula """ dA = ptB.DistanceTo(ptC) dB = ptA.DistanceTo(ptC) dC = ptA.DistanceTo(ptB) p = (dA+dB+dC)/2 area = math.sqrt(p*(p-dA)*(p-dB)*(p-dC)) return area def computeMeshFaceAreas(mesh): """ Computes the face areas for a mesh using triangleArea …