primera subida

MeshTools/MeshGetBoundary.py

@@ -0,0 +1,31 @@
+def get_boundary(mesh):  # From trails
+    """ Create triangulation boundary """
+    import Part
+    import itertools as itools
+    from collections import Counter
+    from ast import literal_eval
+
+    facet_pidx = mesh.Topology[1]
+    edges = itools.chain(*(itools.permutations(pidx, 2) for pidx in facet_pidx))
+    count = Counter((str(edge) for edge in edges))
+    double_boundary = list((literal_eval(k) for k, v in count.items() if v == 1))
+
+    boundary = double_boundary[:1]
+    for candidate in double_boundary[1:]:
+        if candidate in boundary or candidate[::-1] in boundary:
+            pass
+        else:
+            boundary.append(candidate)
+
+    def mkEdge(p1, p2):
+        return Part.makeLine((p1.x, p1.y, p1.z), (p2.x, p2.y, p2.z))
+
+    points = mesh.Points
+    edges = []
+    for p1, p2 in boundary:
+        edges.append(mkEdge(points[p1], points[p2]))
+
+    wires = []
+    for opening in Part.sortEdges(edges):
+        wires.append(Part.Wire(opening))
+    return Part.makeCompound(wires)