\page ghs3dplugin_python_interface_page Python Interface
-Python package GHS3DPluginDC defines several classes, destined for creation of the 3D meshes.
+Python package GHS3DPlugin defines several classes, destined for creation of the 3D meshes.
-GHS3D meshing plugin dynamically adds several methods to the smesh.Mesh class to create meshing algorithms.
+GHS3D meshing plugin dynamically adds several methods to the \ref SMESH_SWIG.smeshBuilder.Mesh "class Mesh" class to create meshing algorithms.
Below you can see an example of usage of the GHS3DPlugin Python API for mesh generation:
\section tui_ghs3d_basic Construction of Mesh using Ghs3D algorithm
-\code
-import geompy
-import smesh
-import BLSURFPlugin
-import GHS3DPlugin
+\anchor example_BLSURFPlugin
+<h2>Example of mesh generation with GHS3D algorithm:</h2>
+\tui_script{ghs3ddemo.py}
-# create a box
-box = geompy.MakeBoxDXDYDZ(200., 200., 200.)
-geompy.addToStudy(box, "box")
-
-# create a mesh on the box
-ghs3dMesh = smesh.Mesh(box,"box: Ghs3D and BLSurf mesh")
-
-# create a BLSurf algorithm for faces
-BLSURF = ghs3dMesh.Triangle(algo=smesh.BLSURF)
-GHS3D = ghs3dMesh.Tetrahedron(algo=smesh.GHS3D)
-
-# compute the mesh
-ghs3dMesh.Compute()
-
-# End of script
-\endcode
\image html ghs3d_screenshot.png Ghs3d mesh without hypothesis
\section tui_ghs3d_enforced_vertices Adding enforced vertices
-\code
-
-# An enforced vertex can be added via:
-# - the coordinates x,y,z
-# - a GEOM vertex or compound (No geometry, TUI only)
-#
-# The created enforced nodes can also be stored in
-# a group.
-#
-# This feature is available only on meshes without geometry.
-
-# Ex1: Add one enforced vertex with coordinates (50,50,100)
-# and physical size 2.
-
-import geompy
-import smesh
-import BLSURFPlugin
-import GHS3DPlugin
-
-# create a box
-box = geompy.MakeBoxDXDYDZ(200., 200., 200.)
-geompy.addToStudy(box, "box")
-# create a mesh on the box
-ghs3dMesh = smesh.Mesh(box,"box: Ghs3D and BLSurf mesh")
-# create a BLSurf algorithm for faces
-ghs3dMesh.Triangle(algo=smesh.BLSURF)
-# compute the mesh
-ghs3dMesh.Compute()
-
-# Make a copy of the 2D mesh
-ghs3dMesh_wo_geometry = smesh.CopyMesh( ghs3dMesh, 'Ghs3D wo geometry', 0, 0)
-
-# create a Ghs3D algorithm and hypothesis and assign them to the mesh
-GHS3D = smesh.CreateHypothesis('GHS3D_3D', 'GHS3DEngine')
-GHS3D_Parameters = smesh.CreateHypothesis('GHS3D_Parameters', 'GHS3DEngine')
-ghs3dMesh.AddHypothesis( GHS3D )
-ghs3dMesh.AddHypothesis( GHS3D_Parameters )
-# Create the enforced vertex
-GHS3D_Parameters.SetEnforcedVertex( 50, 50, 100, 2) # no group
-# Compute the mesh
-ghs3dMesh.Compute()
-
-
-# Ex2: Add one vertex enforced by a GEOM vertex at (50,50,100)
-# with physical size 5 and add it to a group called "My special nodes"
-
-# Create another GHS3D hypothesis and assign it to the mesh without geometry
-GHS3D_Parameters_wo_geometry = smesh.CreateHypothesis('GHS3D_Parameters', 'GHS3DEngine')
-ghs3dMesh_wo_geometry.AddHypothesis( GHS3D )
-ghs3dMesh_wo_geometry.AddHypothesis( GHS3D_Parameters_wo_geometry )
-
-# Create the enforced vertex
-p1 = geompy.MakeVertex(150, 150, 100)
-geompy.addToStudy(p1, "p1")
-GHS3D_Parameters_wo_geometry.SetEnforcedVertexGeomWithGroup( p1, 5 , "My special nodes")
-#GHS3D_Parameters.SetEnforcedVertexGeom( p1, 5 ) # no group
-
-# compute the mesh
-ghs3dMesh_wo_geometry.Compute()
-
-# Erase all enforced vertices
-GHS3D_Parameters.ClearEnforcedVertices()
-
-# End of script
-
-\endcode
+<h2>Example of enforced vertices with GHS3D algorithm:</h2>
+\tui_script{ghs3d_enfvert.py}
+
\image html ghs3d_screenshot_enf1.png Ghs3d mesh with enforced vertex
\image html ghs3d_screenshot_enf2.png Ghs3d mesh with enforced vertex from GEOM vertex
\section tui_ghs3d_enforced_meshes Adding enforced mesh
-\code
-
-# It is possible to constrain GHS3D with another mesh or group.
-# The constraint can refer to the nodes, edges or faces.
-# This feature is available only on 2D meshes without geometry.
-# The constraining elements are called enforced elements for the mesh.
-# They can be recovered using groups if necessary.
-
-# In the following examples, a box and a cylinder are meshed in 2D.
-# The mesh of the cylinder will be used as a constraint for the
-# 3D mesh of the box.
-
-import geompy
-import smesh
-import BLSURFPlugin
-import GHS3DPlugin
-
-box = geompy.MakeBoxDXDYDZ(200, 200, 200)
-geompy.addToStudy( box, "box" )
-cylindre = geompy.MakeCylinderRH(50, 50)
-geompy.TranslateDXDYDZ(cylindre, 100, 100, 30)
-face_cyl = geompy.ExtractShapes(cylindre, geompy.ShapeType["FACE"], True)[1]
-geompy.addToStudy( cylindre, 'cylindre' )
-geompy.addToStudyInFather( cylindre, face_cyl, 'face_cyl' )
-p1 = geompy.MakeVertex(20, 20, 20)
-p2 = geompy.MakeVertex(180, 180, 20)
-c = geompy.MakeCompound([p1,p2])
-geompy.addToStudy( p1, "p1" )
-geompy.addToStudy( p2, "p2" )
-geompy.addToStudy( c, "c" )
-
-# Create the 2D algorithm and hypothesis
-BLSURF = smesh.CreateHypothesis('BLSURF', 'BLSURFEngine')
-# For the box
-BLSURF_Parameters = smesh.CreateHypothesis('BLSURF_Parameters', 'BLSURFEngine')
-BLSURF_Parameters.SetPhysicalMesh( 1 )
-BLSURF_Parameters.SetPhySize( 200 )
-# For the cylinder
-BLSURF_Parameters2 = smesh.CreateHypothesis('BLSURF_Parameters', 'BLSURFEngine')
-BLSURF_Parameters2.SetGeometricMesh( 1 )
-
-# Create the 3D algorithm and hypothesis
-GHS3D = smesh.CreateHypothesis('GHS3D_3D', 'GHS3DEngine')
-GHS3D_Parameters_node = smesh.CreateHypothesis('GHS3D_Parameters', 'GHS3DEngine')
-#GHS3D_Parameters_node.SetToMeshHoles( 1 )
-GHS3D_Parameters_edge = smesh.CreateHypothesis('GHS3D_Parameters', 'GHS3DEngine')
-#GHS3D_Parameters_edge.SetToMeshHoles( 1 )
-GHS3D_Parameters_face = smesh.CreateHypothesis('GHS3D_Parameters', 'GHS3DEngine')
-GHS3D_Parameters_face.SetToMeshHoles( 1 ) # to mesh inside the cylinder
-GHS3D_Parameters_mesh = smesh.CreateHypothesis('GHS3D_Parameters', 'GHS3DEngine')
-GHS3D_Parameters_mesh.SetToMeshHoles( 1 ) # to mesh inside the cylinder
-
-# Create the mesh on the cylinder
-Mesh_cylindre = smesh.Mesh(cylindre)
-smesh.SetName(Mesh_cylindre,"Mesh_cylindre")
-Mesh_cylindre.AddHypothesis( BLSURF )
-Mesh_cylindre.AddHypothesis( BLSURF_Parameters2 )
-# Create some groups
-face_cyl_faces = Mesh_cylindre.GroupOnGeom(face_cyl,'group_face_cyl', smesh.FACE)
-face_cyl_edges = Mesh_cylindre.GroupOnGeom(face_cyl,'group_edge_cyl', smesh.EDGE)
-face_cyl_nodes = Mesh_cylindre.GroupOnGeom(face_cyl,'group_node_cyl', smesh.NODE)
-Mesh_cylindre.Compute()
-
-# Create the mesh on the cylinder
-Mesh_box_tri = smesh.Mesh(box)
-smesh.SetName(Mesh_box_tri,"Mesh_box_tri")
-Mesh_box_tri.AddHypothesis( BLSURF )
-Mesh_box_tri.AddHypothesis( BLSURF_Parameters )
-Mesh_box_tri.Compute()
-
-# Create 4 copies of the 2D mesh to test the 3 types of contraints (NODE, EDGE, FACE)
-# from the whole mesh and from groups of elements.
-# Then the 3D algo and hypothesis are assigned to them.
-
-mesh_mesh = smesh.CopyMesh( Mesh_box_tri, 'Enforced by faces of mesh', 0, 0)
-mesh_mesh.AddHypothesis( GHS3D )
-mesh_mesh.AddHypothesis( GHS3D_Parameters_mesh)
-
-mesh_node = smesh.CopyMesh( Mesh_box_tri, 'Enforced by group of nodes', 0, 0)
-mesh_node.AddHypothesis( GHS3D )
-mesh_node.AddHypothesis( GHS3D_Parameters_node)
-
-mesh_edge = smesh.CopyMesh( Mesh_box_tri, 'Enforced by group of edges', 0, 0)
-mesh_edge.AddHypothesis( GHS3D )
-mesh_edge.AddHypothesis( GHS3D_Parameters_edge)
-
-mesh_face = smesh.CopyMesh( Mesh_box_tri, 'Enforced by group of faces', 0, 0)
-mesh_face.AddHypothesis( GHS3D )
-mesh_face.AddHypothesis( GHS3D_Parameters_face)
-
-# Add the enforced elements
-GHS3D_Parameters_mesh.SetEnforcedMeshWithGroup(Mesh_cylindre.GetMesh(),smesh.FACE,"faces from cylinder")
-GHS3D_Parameters_node.SetEnforcedMeshWithGroup(face_cyl_nodes,smesh.NODE,"nodes from face_cyl_nodes")
-GHS3D_Parameters_edge.SetEnforcedMeshWithGroup(face_cyl_edges,smesh.EDGE,"edges from face_cyl_edges")
-GHS3D_Parameters_face.SetEnforcedMeshWithGroup(face_cyl_faces,smesh.FACE,"faces from face_cyl_faces")
-
-#Compute the meshes
-mesh_node.Compute()
-mesh_edge.Compute()
-mesh_face.Compute()
-mesh_mesh.Compute()
-
-# End of script
-
-\endcode
+<h2>Example of enforced meshes with GHS3D algorithm:</h2>
+\tui_script{ghs3d_enfmesh.py}
\image html ghs3d_screenshot_enf3.png
\image html ghs3d_screenshot_enf4.png
