fix bug in mesh.from_points related to delaunay triangulation

Author: tomvanmele

CHANGELOG.md

@@ -41,6 +41,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+* Fixed bug (inconsistency) in return value of `compas.geometry.triangulation_delaunay.delaunay_triangulation`. Only the faces of the triangulation should be returned.
+
 ### Removed
 
 * Removed property `is_compound` from `compas.geometry.Brep` as OCC specific.

src/compas/datastructures/mesh/mesh.py

@@ -576,8 +576,8 @@ def from_points(cls, points):  # type: (...) -> Mesh
         """
         from compas.geometry import delaunay_triangulation
 
-        vertices, faces = delaunay_triangulation(points)
-        return cls.from_vertices_and_faces(vertices, faces)
+        faces = delaunay_triangulation(points)
+        return cls.from_vertices_and_faces(points, faces)
 
     @classmethod
     def from_polygons(cls, polygons, precision=None):  # type: (...) -> Mesh

src/compas/geometry/triangulation_delaunay.py

@@ -12,8 +12,8 @@ def delaunay_triangulation(points):
 
     Returns
     -------
-    (list, list)
-        The vertices of the triangulation, and the faces of the triangulation.
+    list[list[int]]
+        The faces of the triangulation.
 
     Examples
     --------
@@ -25,7 +25,7 @@ def delaunay_triangulation(points):
 
     xyz = asarray(points)
     d = Delaunay(xyz[:, 0:2])
-    return xyz, d.simplices
+    return d.simplices
 
 
 delaunay_triangulation.__pluggable__ = True