trimesh_isolines

trimesh_isolines(M, S, N=50)[source]

Compute isolines on a triangle mesh using a scalarfield of data points assigned to its vertices.

Parameters:
Mtuple or compas.datastructures.Mesh

A mesh represented by a list of vertices and a list of faces or by a COMPAS mesh object.

Slist

A list of scalars.

Nint, optional

The number of isolines. Default is 50.

Returns:
tuple

  1. The coordinates of the polyline segments representing the isolines.

  2. The segments of the polylines.

Examples

>>> import compas
>>> import compas_libigl
>>> from compas.datastructures import Mesh
>>> mesh = Mesh.from_off(compas.get('tubemesh.off'))
>>> mesh.quads_to_triangles()
>>> M = mesh.to_vertices_and_faces()
>>> scalars = mesh.vertices_attribute('z')
>>> vertices, edges = compas_libigl.trimesh_isolines(M, scalars, 50)

To convert the vertices and edges to sets of isolines, use groupsort_isolines()