From a85ce1976c1dfae5e64dc65976ad6f28f488cced Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sun, 10 Nov 2019 11:14:04 +0100
Subject: [PATCH] add method to get wires of mesh boundaries

---
 src/Mod/MeshPart/App/AppMeshPartPy.cpp | 33 +++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/src/Mod/MeshPart/App/AppMeshPartPy.cpp b/src/Mod/MeshPart/App/AppMeshPartPy.cpp
index eb733cc2b707..a8977dc948b9 100644
--- a/src/Mod/MeshPart/App/AppMeshPartPy.cpp
+++ b/src/Mod/MeshPart/App/AppMeshPartPy.cpp
@@ -86,7 +86,10 @@ class Module : public Py::ExtensionModule<Module>
             "projectPointsOnMesh(list of points, Mesh, Vector, [float]) -> list of points\n"
         );
         add_varargs_method("wireFromSegment",&Module::wireFromSegment,
-            "Create wire(s) from boundary of segment\n"
+            "Create wire(s) from boundary of a mesh segment\n"
+        );
+        add_varargs_method("wireFromMesh",&Module::wireFromMesh,
+            "Create wire(s) from boundary of a mesh\n"
         );
         add_keyword_method("meshFromShape",&Module::meshFromShape,
             "Create surface mesh from shape\n"
@@ -442,6 +445,34 @@ class Module : public Py::ExtensionModule<Module>
 
         return wires;
     }
+    Py::Object wireFromMesh(const Py::Tuple& args)
+    {
+        PyObject *m;
+        if (!PyArg_ParseTuple(args.ptr(), "O!", &(Mesh::MeshPy::Type), &m))
+            throw Py::Exception();
+
+        Mesh::MeshObject* mesh = static_cast<Mesh::MeshPy*>(m)->getMeshObjectPtr();
+
+        std::list<std::vector<Base::Vector3f> > bounds;
+        MeshCore::MeshAlgorithm algo(mesh->getKernel());
+        algo.GetMeshBorders(bounds);
+
+        Py::List wires;
+        std::list<std::vector<Base::Vector3f> >::iterator bt;
+
+        for (bt = bounds.begin(); bt != bounds.end(); ++bt) {
+            BRepBuilderAPI_MakePolygon mkPoly;
+            for (std::vector<Base::Vector3f>::reverse_iterator it = bt->rbegin(); it != bt->rend(); ++it) {
+                mkPoly.Add(gp_Pnt(it->x,it->y,it->z));
+            }
+            if (mkPoly.IsDone()) {
+                PyObject* wire = new Part::TopoShapeWirePy(new Part::TopoShape(mkPoly.Wire()));
+                wires.append(Py::Object(wire, true));
+            }
+        }
+
+        return wires;
+    }
     Py::Object meshFromShape(const Py::Tuple& args, const Py::Dict& kwds)
     {
         PyObject *shape;