First draft of t7.py

demos/api/t7.py

+# This file reimplements gmsh/tutorial/t7.geo in Python.
+# It extends t1.py to use a background mesh.
+
+import gmsh
+
+model = gmsh.model
+factory = model.geo
+
+# adapted t1.py section {{{
+
+gmsh.initialize()
+gmsh.option.setNumber("General.Terminal", 1)
+
+lc = 1e-2
+factory.addPoint(0, 0, 0, lc, 1)
+factory.addPoint(.1, 0,  0, lc, 2)
+factory.addPoint(.1, .3, 0, lc, 3)
+factory.addPoint(0, .3, 0, lc, 4)
+
+factory.addLine(1, 2, 1)
+factory.addLine(3, 2, 2)
+factory.addLine(3, 4, 3)
+factory.addLine(4, 1, 4)
+
+factory.addCurveLoop([4, 1, -2, 3], 1)
+factory.addPlaneSurface([1], 1)
+
+model.addPhysicalGroup(0, [1, 2], 1)
+model.addPhysicalGroup(1, [1, 2], 2)
+model.addPhysicalGroup(2, [1], 6)
+
+model.setPhysicalName(2, 6, "My surface")
+
+model.geo.synchronize()
+# }}}
+
+# -- begin t7.py --
+
+# add the background mesh file as a view
+gmsh.merge("bgmesh.pos")
+
+# pass the just-added view number to specify the background mesh
+gmsh.model.mesh.field.setAsBackgroundMesh(0)
+gmsh.model.mesh.generate(2)
+
+# show the mesh file
+# gmsh.fltk.run()
+
+gmsh.finalize()