Adding user documentation

This commit is contained in:
Yoann Audouin 2022-10-10 09:34:15 +02:00
parent 7d1a127bbb
commit b131becc08
12 changed files with 128 additions and 27 deletions

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@ -1,8 +1,5 @@
#!/usr/bin/env python # Creating dual Mesh
###
### This file is generated automatically by SALOME v9.9.0 with dump python functionality
###
import sys import sys
import salome import salome
@ -22,6 +19,7 @@ import math
import SALOMEDS import SALOMEDS
# Creating a sphere
geompy = geomBuilder.New() geompy = geomBuilder.New()
O = geompy.MakeVertex(0, 0, 0) O = geompy.MakeVertex(0, 0, 0)
@ -36,20 +34,20 @@ geompy.addToStudy( OY, 'OY' )
geompy.addToStudy( OZ, 'OZ' ) geompy.addToStudy( OZ, 'OZ' )
geompy.addToStudy( Sphere_1, 'Sphere_1' ) geompy.addToStudy( Sphere_1, 'Sphere_1' )
###
### SMESH component
###
import SMESH, SALOMEDS import SMESH, SALOMEDS
from salome.smesh import smeshBuilder from salome.smesh import smeshBuilder
smesh = smeshBuilder.New() smesh = smeshBuilder.New()
# Meshing sphere in Tetrahedron
NETGEN_3D_Parameters_1 = smesh.CreateHypothesisByAverageLength( 'NETGEN_Parameters', 'NETGENEngine', 34.641, 0 ) NETGEN_3D_Parameters_1 = smesh.CreateHypothesisByAverageLength( 'NETGEN_Parameters', 'NETGENEngine', 34.641, 0 )
Mesh_1 = smesh.Mesh(Sphere_1,'Mesh_1') Mesh_1 = smesh.Mesh(Sphere_1,'Mesh_1')
status = Mesh_1.AddHypothesis( Sphere_1, NETGEN_3D_Parameters_1 ) status = Mesh_1.AddHypothesis( Sphere_1, NETGEN_3D_Parameters_1 )
NETGEN_1D_2D_3D = Mesh_1.Tetrahedron(algo=smeshBuilder.NETGEN_1D2D3D) NETGEN_1D_2D_3D = Mesh_1.Tetrahedron(algo=smeshBuilder.NETGEN_1D2D3D)
isDone = Mesh_1.Compute() isDone = Mesh_1.Compute()
# Creating Dual mesh
dual_Mesh_1 = smesh.CreateDualMesh( Mesh_1, 'dual_Mesh_1', True) dual_Mesh_1 = smesh.CreateDualMesh( Mesh_1, 'dual_Mesh_1', True)

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@ -128,6 +128,7 @@ SET(BAD_TESTS
transforming_meshes_ex06.py transforming_meshes_ex06.py
viewing_meshes_ex01.py viewing_meshes_ex01.py
radial_prism_3d_algo.py radial_prism_3d_algo.py
create_dual_mesh.py
) )
IF(NOT WIN32) IF(NOT WIN32)
LIST(APPEND BAD_TESTS LIST(APPEND BAD_TESTS

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@ -57,7 +57,7 @@ SET(_cmd_smeshBuilder_gen_options ${smesh_merge_file} -o tmp2/smeshBuilder.py sm
SALOME_GENERATE_ENVIRONMENT_SCRIPT(_cmd_smeshBuilder_gen env_script "${PYTHON_EXECUTABLE}" "${_cmd_smeshBuilder_gen_options}" CONTEXT "SMESH_DOC" ADDITIONAL_VARIABLES ${ADD_VAR}) SALOME_GENERATE_ENVIRONMENT_SCRIPT(_cmd_smeshBuilder_gen env_script "${PYTHON_EXECUTABLE}" "${_cmd_smeshBuilder_gen_options}" CONTEXT "SMESH_DOC" ADDITIONAL_VARIABLES ${ADD_VAR})
ADD_CUSTOM_TARGET(pre_usr_docs ADD_CUSTOM_TARGET(pre_usr_docs
# 1. Make temporary directories for python modules # 1. Make temporary directories for python modules
COMMAND ${CMAKE_COMMAND} -E make_directory tmp1 COMMAND ${CMAKE_COMMAND} -E make_directory tmp1
COMMAND ${CMAKE_COMMAND} -E make_directory tmp2 COMMAND ${CMAKE_COMMAND} -E make_directory tmp2

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@ -1,8 +1,8 @@
.. _about_meshes_page: .. _about_meshes_page:
************ ************
About meshes About meshes
************ ************
**MESH** represents a discrete approximation of a subset of the three-dimensional space by `elementary geometrical elements`_. **MESH** represents a discrete approximation of a subset of the three-dimensional space by `elementary geometrical elements`_.
@ -10,7 +10,7 @@ A SALOME study can contain multiple meshes, but they do not implicitly compose o
Mesh module provides several ways to create the mesh: Mesh module provides several ways to create the mesh:
* The main way is to :ref:`construct the mesh <constructing_meshes_page>` on the basis of the geometrical shape produced in the Geometry module. This way implies selection of * The main way is to :ref:`construct the mesh <constructing_meshes_page>` on the basis of the geometrical shape produced in the Geometry module. This way implies selection of
* a geometrical object (*main shape*) and * a geometrical object (*main shape*) and
* *meshing parameters* (:ref:`meshing algorithms <basic_meshing_algos_page>` and characteristics (e.g. element size) of a required mesh encapsulated in :ref:`hypothesis <about_hypo_page>` objects). * *meshing parameters* (:ref:`meshing algorithms <basic_meshing_algos_page>` and characteristics (e.g. element size) of a required mesh encapsulated in :ref:`hypothesis <about_hypo_page>` objects).
@ -20,19 +20,21 @@ Mesh module provides several ways to create the mesh:
.. note:: .. note::
Algorithms and hypotheses used at mesh level are referred to as *global* ones and those used at sub-mesh level are referred to as *local* ones. Algorithms and hypotheses used at mesh level are referred to as *global* ones and those used at sub-mesh level are referred to as *local* ones.
* Bottom-up way, using :ref:`mesh modification <modifying_meshes_page>` operations, especially :ref:`extrusion <extrusion_page>` and :ref:`revolution <revolution_page>`. To create an empty mesh not based on geometry, use the same dialog as to :ref:`construct the mesh on geometry <constructing_meshes_page>` but specify neither the geometry nor meshing algorithms. * Bottom-up way, using :ref:`mesh modification <modifying_meshes_page>` operations, especially :ref:`extrusion <extrusion_page>` and :ref:`revolution <revolution_page>`. To create an empty mesh not based on geometry, use the same dialog as to :ref:`construct the mesh on geometry <constructing_meshes_page>` but specify neither the geometry nor meshing algorithms.
* The mesh can be :ref:`imported <importing_exporting_meshes_page>` from (and exported to) the file in MED, UNV, STL, CGNS, DAT and GMF formats. * The mesh can be :ref:`imported <importing_exporting_meshes_page>` from (and exported to) the file in MED, UNV, STL, CGNS, DAT and GMF formats.
* The 3D mesh can be generated from the 2D mesh not based on geometry, which was either :ref:`imported <importing_exporting_meshes_page>` or created in other way. To setup the meshing parameters of a mesh not based on geometry, just invoke :ref:`Edit mesh / sub-mesh <editing_meshes_page>` command on your 2D mesh. * The 3D mesh can be generated from the 2D mesh not based on geometry, which was either :ref:`imported <importing_exporting_meshes_page>` or created in other way. To setup the meshing parameters of a mesh not based on geometry, just invoke :ref:`Edit mesh / sub-mesh <editing_meshes_page>` command on your 2D mesh.
* Several meshes can be :ref:`combined <building_compounds_page>` into a new mesh. * Several meshes can be :ref:`combined <building_compounds_page>` into a new mesh.
* The whole mesh or its part (sub-mesh or group) can be :ref:`copied <copy_mesh_page>` into a new mesh. * The whole mesh or its part (sub-mesh or group) can be :ref:`copied <copy_mesh_page>` into a new mesh.
* A new mesh can be created from a transformed, e.g. :ref:`translated <translation_page>`, part of the mesh. * A new mesh can be created from a transformed, e.g. :ref:`translated <translation_page>`, part of the mesh.
* A new mesh can be created from the gernation of the :ref:`dual <create_dual_mesh_page>` of a Tetrahedron Mesh.
Meshes can be edited using the MESH functions destined for :ref:`modification <modifying_meshes_page>` of meshes. Meshes can be edited using the MESH functions destined for :ref:`modification <modifying_meshes_page>` of meshes.
@ -82,4 +84,5 @@ Quadratic mesh can be obtained in three ways:
importing_exporting_meshes.rst importing_exporting_meshes.rst
building_compounds.rst building_compounds.rst
copy_mesh.rst copy_mesh.rst
create_dual_mesh.rst
connectivity.rst connectivity.rst

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@ -0,0 +1,42 @@
.. _create_dual_mesh_page:
****************
Create Dual Mesh
****************
We can create the dual of a Tetrahedron Mesh which will be a polyhedron mesh.
The Mesh is created using MEDCoupling computeDualMesh function.
*To create a dual mesh:*
.. |img| image:: ../images/create_dual_mesh_icon.png
From the contextual menu in the Object Browser of from the **Mesh** menu select
**Create Dual Mesh** or click *"Create Dual Mesh"* button |img| in the toolbar.
The following dialog box will appear:
.. image:: ../images/create_dual_mesh_dlg.png
:align: center
In the dialog:
* specify the mesh for which to create the dual mesh:
* **Select whole mesh** from the study tree. If a mesh was selected before calling function it will be preselected.
* If the mesh is not made of only Tetrahedrons a error message will be displayed and you won't be allowed to go through.
* specify the **New Mesh Name**;
* activate **Project boundary elements on shape** for the boundary points of the
dual mesh to be projected on their associated shape.
* Click **Apply** or **Apply and Close** button to confirm the operation.
----------------------------
Limitations of the dual mesh
----------------------------
Only 2d groups will be transferred to the dual mesh.
If you have convex shape the projection might not improve the mesh.
**See Also** a sample script of :ref:`tui_create_dual_mesh`.

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@ -70,7 +70,7 @@ Export of a Mesh
:download:`Download this script <../../examples/creating_meshes_ex05.py>` :download:`Download this script <../../examples/creating_meshes_ex05.py>`
.. _how_to_mesh_a_cylinder_with_hexahedrons: .. _how_to_mesh_a_cylinder_with_hexahedrons:
How to mesh a cylinder with hexahedrons? How to mesh a cylinder with hexahedrons?
======================================== ========================================
@ -84,10 +84,10 @@ demonstrates the resulting mesh.
:download:`Download this script <../../examples/creating_meshes_ex06.py>` :download:`Download this script <../../examples/creating_meshes_ex06.py>`
.. image:: ../images/mesh_cylinder_hexa.png .. image:: ../images/mesh_cylinder_hexa.png
:align: center :align: center
.. _tui_building_compound: .. _tui_building_compound:
Building a compound of meshes Building a compound of meshes
============================= =============================
@ -107,3 +107,13 @@ Mesh Copying
:download:`Download this script <../../examples/creating_meshes_ex08.py>` :download:`Download this script <../../examples/creating_meshes_ex08.py>`
.. _tui_create_dual_mesh:
Creating Dual Mesh
==================
.. literalinclude:: ../../examples/create_dual_mesh.py
:language: python
:download:`Download this script <../../examples/create_dual_mesh.py>`

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@ -150,9 +150,10 @@ void SMESHGUI_CreateDualMeshOp::selectionDone()
{ {
SMESH::SMESH_subMesh_var subMesh = SMESH::SMESH_subMesh_var subMesh =
SMESH::SObjectToInterface<SMESH::SMESH_subMesh>( pObj ); SMESH::SObjectToInterface<SMESH::SMESH_subMesh>( pObj );
// TODO: Check that mesh is only tetra // Check that mesh is only tetra
if (!checkMesh(idSource)){ if (!checkMesh(idSource)){
myDlg->ShowWarning( true ); myDlg->ShowWarning( true );
myDlg->setButtonEnabled(false, QtxDialog::OK|QtxDialog::Apply);
} }
} }
std::string mesh_name = "dual_" + pObj->GetName(); std::string mesh_name = "dual_" + pObj->GetName();

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@ -2885,6 +2885,7 @@ SMESH::SMESH_Mesh_ptr SMESH_Gen_i::CreateDualMesh(SMESH::SMESH_IDSource_ptr mesh
SMESH_Mesh& newMesh2 = newMesh_i->GetImpl(); SMESH_Mesh& newMesh2 = newMesh_i->GetImpl();
MESSAGE("Loading file: " << dual_mesh_file.string() << " with mesh " << mesh_name);
newMesh2.MEDToMesh(dual_mesh_file.c_str(), meshName); newMesh2.MEDToMesh(dual_mesh_file.c_str(), meshName);
MESSAGE("Imported created MED") MESSAGE("Imported created MED")

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@ -4,6 +4,7 @@ import sys
import salome import salome
import medcoupling as mc import medcoupling as mc
from math import pi from math import pi
import numpy as np
#salome.salome_init() #salome.salome_init()
@ -17,6 +18,10 @@ from salome.smesh import smeshBuilder
smesh = smeshBuilder.New() smesh = smeshBuilder.New()
from salome.kernel.logger import Logger
logger = Logger("salome.smesh.smesh_tools")
logger.setLevel("DEBUG")
def smesh_create_dual_mesh(mesh_ior, output_file, adapt_to_shape=True, mesh_name="MESH"): def smesh_create_dual_mesh(mesh_ior, output_file, adapt_to_shape=True, mesh_name="MESH"):
""" Create a dual of the mesh in input_file into output_file """ Create a dual of the mesh in input_file into output_file
@ -31,15 +36,51 @@ def smesh_create_dual_mesh(mesh_ior, output_file, adapt_to_shape=True, mesh_name
shape = mesh.GetShapeToMesh() shape = mesh.GetShapeToMesh()
# Creating output file
myfile = mc.MEDFileUMesh()
myfile.setName(mesh_name)
# We got a meshProxy so we need to convert pointer to MEDCoupling # We got a meshProxy so we need to convert pointer to MEDCoupling
int_ptr = mesh.ExportMEDCoupling(True, True) int_ptr = mesh.ExportMEDCoupling(True, True)
dab = mc.FromPyIntPtrToDataArrayByte(int_ptr) dab = mc.FromPyIntPtrToDataArrayByte(int_ptr)
tetras = mc.MEDFileMesh.New(dab)[0] mc_mesh_file = mc.MEDFileMesh.New(dab)
tetras = mc_mesh_file[0]
# End of SMESH -> MEDCoupling part for dualmesh # End of SMESH -> MEDCoupling part for dualmesh
tetras = mc.MEDCoupling1SGTUMesh(tetras) tetras = mc.MEDCoupling1SGTUMesh(tetras)
polyh = tetras.computeDualMesh() polyh = tetras.computeDualMesh()
dual_volume_raw = polyh.getMeasureField(True).accumulate()[0]
## Adding skin + transfering groups on faces from tetras mesh
mesh2d = polyh.buildUnstructured().computeSkin()
mesh2d.setName(mesh_name)
myfile.setMeshAtLevel(-1, mesh2d)
for grp_name in mc_mesh_file.getGroupsOnSpecifiedLev(-1):
logger.debug("Transferring group: "+ grp_name)
grp_tria = mc_mesh_file.getGroup(-1, grp_name)
# Retrieve the nodes in group
grp_nodes = grp_tria.computeFetchedNodeIds()
# Find all the cells lying on one of the nodes
id_grp_poly = mesh2d.getCellIdsLyingOnNodes(grp_nodes, False)
grp_poly = mesh2d[id_grp_poly]
# We use the interpolation to remove the element that are not really in
# the group (the ones that are next to a nodes nut not in the group
# will have the sum of their column in the enterpolation matrix equal
# to zero)
rem = mc.MEDCouplingRemapper()
rem.prepare(grp_poly, grp_tria, "P0P0")
m = rem.getCrudeCSRMatrix()
_, id_to_keep = np.where(m.sum(dtype=np.int64, axis=0) >= 1e-07)
id_grp_poly = id_grp_poly[id_to_keep.tolist()]
id_grp_poly.setName(grp_name)
myfile.addGroup(-1, id_grp_poly)
# Getting list of new points added on the skin # Getting list of new points added on the skin
skin = tetras.buildUnstructured().computeSkin() skin = tetras.buildUnstructured().computeSkin()
@ -50,6 +91,7 @@ def smesh_create_dual_mesh(mesh_ior, output_file, adapt_to_shape=True, mesh_name
ptsAddedMesh = mc.MEDCouplingUMesh.Build0DMeshFromCoords( skin_polyh.getCoords()[ptsAdded] ) ptsAddedMesh = mc.MEDCouplingUMesh.Build0DMeshFromCoords( skin_polyh.getCoords()[ptsAdded] )
if adapt_to_shape: if adapt_to_shape:
logger.debug("Adapting to shape")
ptsAddedCoo = ptsAddedMesh.getCoords() ptsAddedCoo = ptsAddedMesh.getCoords()
ptsAddedCooModified = ptsAddedCoo[:] ptsAddedCooModified = ptsAddedCoo[:]
@ -58,7 +100,6 @@ def smesh_create_dual_mesh(mesh_ior, output_file, adapt_to_shape=True, mesh_name
id2face = {} id2face = {}
for face in faces: for face in faces:
id2face[face.GetSubShapeIndices()[0]] = face id2face[face.GetSubShapeIndices()[0]] = face
print(id2face)
## Projecting each points added by the dual mesh on the surface it is ## Projecting each points added by the dual mesh on the surface it is
# associated with # associated with
@ -74,4 +115,7 @@ def smesh_create_dual_mesh(mesh_ior, output_file, adapt_to_shape=True, mesh_name
polyh.getCoords()[ptsAdded] = ptsAddedCooModified polyh.getCoords()[ptsAdded] = ptsAddedCooModified
polyh.setName(mesh_name) polyh.setName(mesh_name)
polyh.write(output_file) myfile.setMeshAtLevel(0, polyh)
logger.debug("Writting dual mesh in :"+output_file)
myfile.write(output_file, 2)

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@ -80,6 +80,8 @@ isDone = Mesh_1.Compute()
dual_Mesh_1 = smesh.CreateDualMesh(Mesh_1, 'dual_Mesh_1', True) dual_Mesh_1 = smesh.CreateDualMesh(Mesh_1, 'dual_Mesh_1', True)
dual_Mesh_raw_1 = smesh.CreateDualMesh(Mesh_1, 'dual_Mesh_1', False) dual_Mesh_raw_1 = smesh.CreateDualMesh(Mesh_1, 'dual_Mesh_1', False)
[ top_2, middle_2, bottom_2 ] = dual_Mesh_1.GetGroups()
#Comparing volumes #Comparing volumes
dual_volume = dual_Mesh_1.GetVolume() dual_volume = dual_Mesh_1.GetVolume()
dual_raw_volume = dual_Mesh_raw_1.GetVolume() dual_raw_volume = dual_Mesh_raw_1.GetVolume()

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@ -62,7 +62,6 @@ SET(BAD_TESTS
SMESH_test1.py SMESH_test1.py
SMESH_test2.py SMESH_test2.py
SMESH_test4.py SMESH_test4.py
SMESH_create_dual_mesh.py
SMESH_create_dual_mesh_adapt.py SMESH_create_dual_mesh_adapt.py
) )
IF(NOT WIN32) IF(NOT WIN32)