X-Git-Url: http://git.salome-platform.org/gitweb/?p=modules%2Fsmesh.git;a=blobdiff_plain;f=doc%2Fexamples%2Fcartesian_algo.py;fp=doc%2Fexamples%2Fcartesian_algo.py;h=584d667152d34a84135a4315884e802932369da3;hp=0000000000000000000000000000000000000000;hb=4cf07a14111e98e8889620ee7e6371574c31a50c;hpb=d9f4b53e489dd5857db264ede6acded7b076c9f1

diff --git a/doc/examples/cartesian_algo.py b/doc/examples/cartesian_algo.py
new file mode 100644
index 000000000..584d66715
--- /dev/null
+++ b/doc/examples/cartesian_algo.py
@@ -0,0 +1,108 @@
+# Usage of Body Fitting algorithm
+
+import salome
+salome.salome_init_without_session()
+
+from salome.geom import geomBuilder
+from salome.smesh import smeshBuilder
+
+geom_builder = geomBuilder.New()
+smesh_builder = smeshBuilder.New()
+
+# create a sphere
+sphere = geom_builder.MakeSphereR( 50 )
+
+# cut the sphere by a box
+box = geom_builder.MakeBoxDXDYDZ( 100, 100, 100 )
+partition = geom_builder.MakePartition([ sphere ], [ box ], theName="partition")
+
+# create a mesh and assign a "Body Fitting" algo
+mesh = smesh_builder.Mesh( partition )
+cartAlgo = mesh.BodyFitted()
+
+# define a cartesian grid using Coordinates
+coords = list(range(-100,100,10))
+cartHyp = cartAlgo.SetGrid( coords,coords,coords, 1000000)
+
+# compute the mesh
+mesh.Compute()
+print("nb hexahedra",mesh.NbHexas())
+print("nb tetrahedra",mesh.NbTetras())
+print("nb polyhedra",mesh.NbPolyhedrons())
+print()
+
+# define the grid by setting constant spacing
+cartHyp = cartAlgo.SetGrid( "10","10","10", 1000000)
+
+mesh.Compute()
+print("nb hexahedra",mesh.NbHexas())
+print("nb tetrahedra",mesh.NbTetras())
+print("nb polyhedra",mesh.NbPolyhedrons())
+print("nb faces",mesh.NbFaces())
+print()
+
+# activate creation of faces
+cartHyp.SetToCreateFaces( True )
+
+mesh.Compute()
+print("nb hexahedra",mesh.NbHexas())
+print("nb tetrahedra",mesh.NbTetras())
+print("nb polyhedra",mesh.NbPolyhedrons())
+print("nb faces",mesh.NbFaces())
+print()
+
+# enable consideration of shared faces
+cartHyp.SetToConsiderInternalFaces( True )
+mesh.Compute()
+print("nb hexahedra",mesh.NbHexas())
+print("nb tetrahedra",mesh.NbTetras())
+print("nb polyhedra",mesh.NbPolyhedrons())
+print("nb faces",mesh.NbFaces())
+print()
+
+# define the grid by setting different spacing in 2 sub-ranges of geometry
+spaceFuns = ["5","10+10*t"]
+cartAlgo.SetGrid( [spaceFuns, [0.5]], [spaceFuns, [0.5]], [spaceFuns, [0.25]], 10 )
+
+mesh.Compute()
+print("nb hexahedra",mesh.NbHexas())
+print("nb tetrahedra",mesh.NbTetras())
+print("nb polyhedra",mesh.NbPolyhedrons())
+print()
+
+# Example of customization of dirtections of the grid axes
+
+# make a box with non-orthogonal edges
+xDir = geom_builder.MakeVectorDXDYDZ( 1.0, 0.1, 0.0, "xDir" )
+yDir = geom_builder.MakeVectorDXDYDZ(-0.1, 1.0, 0.0, "yDir"  )
+zDir = geom_builder.MakeVectorDXDYDZ( 0.2, 0.3, 1.0, "zDir"  )
+face = geom_builder.MakePrismVecH( xDir, yDir, 1.0 )
+box  = geom_builder.MakePrismVecH( face, zDir, 1.0, theName="box" )
+
+spc = "0.1" # spacing
+
+# default axes
+mesh = smesh_builder.Mesh( box, "custom axes")
+algo = mesh.BodyFitted()
+algo.SetGrid( spc, spc, spc, 10000 )
+mesh.Compute()
+print("Default axes")
+print("   nb hex:",mesh.NbHexas())
+
+# set axes using edges of the box
+algo.SetAxesDirs( xDir, [-0.1,1,0], zDir )
+mesh.Compute()
+print("Manual axes")
+print("   nb hex:",mesh.NbHexas())
+
+# set optimal orthogonal axes
+algo.SetOptimalAxesDirs( isOrthogonal=True )
+mesh.Compute()
+print("Optimal orthogonal axes")
+print("   nb hex:",mesh.NbHexas())
+
+# set optimal non-orthogonal axes
+algo.SetOptimalAxesDirs( isOrthogonal=False )
+mesh.Compute()
+print("Optimal non-orthogonal axes")
+print("   nb hex:",mesh.NbHexas())