def get_region_data(self):
# mesh regions
self.ele_length_map = {} # { 'ElementString' : element length }
self.ele_node_map = {} # { 'ElementString' : [element nodes] }
if not self.mesh_obj.MeshRegionList:
print(' No mesh regions.')
else:
print(' Mesh regions, we need to get the elements.')
# by the use of MeshRegion object and a BooleanSplitCompound there could be problems with node numbers see
# http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&start=40#p149467
# http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&p=149520#p149520
part = self.part_obj
if self.mesh_obj.MeshRegionList:
if part.Shape.ShapeType == "Compound" and hasattr(
part, "Proxy"
): # other part obj might not have a Proxy, thus an exception would be raised
if (part.Proxy.Type == "FeatureBooleanFragments"
or part.Proxy.Type == "FeatureSlice"
or part.Proxy.Type == "FeatureXOR"):
error_message = " The mesh to shape is a boolean split tools Compound and the mesh has mesh region list. GMSH could return unexpected meshes in such circumstances. It is strongly recommended to extract the shape to mesh from the Compound and use this one."
FreeCAD.Console.PrintError(error_message + "\n")
# TODO no gui popup because FreeCAD will be in a endless prind loop as long as the pop up is on --> my be find a better solution for either of both --> thus the pop up is in task panel
for mr_obj in self.mesh_obj.MeshRegionList:
# print(mr_obj.Name)
# print(mr_obj.CharacteristicLength)
# print(Units.Quantity(mr_obj.CharacteristicLength).Value)
if mr_obj.CharacteristicLength:
if mr_obj.References:
for sub in mr_obj.References:
# print(sub[0]) # Part the elements belongs to
# check if the shape of the mesh region is an element of the Part to mesh, if not try to find the element in the shape to mesh
search_ele_in_shape_to_mesh = False
if not self.part_obj.Shape.isSame(sub[0].Shape):
# print(" One element of the meshregion " + mr_obj.Name + " is not an element of the Part to mesh.")
# print(" But we gone try to find it in the Shape to mesh :-)")
search_ele_in_shape_to_mesh = True
for elems in sub[1]:
# print(elems) # elems --> element
if search_ele_in_shape_to_mesh:
# we gone try to find the element it in the Shape to mesh and use the found element as elems
ele_shape = FemMeshTools.get_element(
sub[0], elems
) # the method getElement(element) does not return Solid elements
found_element = FemMeshTools.find_element_in_shape(
self.part_obj.Shape, ele_shape)
if found_element:
elems = found_element
else:
FreeCAD.Console.PrintError(
"One element of the meshregion " +
mr_obj.Name +
" could not be found in the Part to mesh. It will be ignored.\n"
)
# print(elems) # element
if elems not in self.ele_length_map:
self.ele_length_map[
elems] = Units.Quantity(
mr_obj.CharacteristicLength).Value
else:
FreeCAD.Console.PrintError(
"The element " + elems +
" of the meshregion " + mr_obj.Name +
" has been added to another mesh region.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the reference list is empty.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the CharacteristicLength is 0.0 mm.\n"
)
for eleml in self.ele_length_map:
ele_shape = FemMeshTools.get_element(
self.part_obj, eleml
) # the method getElement(element) does not return Solid elements
ele_vertexes = FemMeshTools.get_vertexes_by_element(
self.part_obj.Shape, ele_shape)
self.ele_node_map[eleml] = ele_vertexes
print(' {}'.format(self.ele_length_map))
print(' {}'.format(self.ele_node_map))
def get_group_data(self):
self.group_elements = {}
# TODO solid, face, edge seam not work together, some print or make it work together
# TODO handle groups for Edges and Vertexes
# mesh groups and groups of analysis member
if not self.mesh_obj.MeshGroupList:
print(' No mesh group objects.')
else:
print(' Mesh group objects, we need to get the elements.')
for mg in self.mesh_obj.MeshGroupList:
new_group_elements = FemMeshTools.get_mesh_group_elements(
mg, self.part_obj)
for ge in new_group_elements:
if ge not in self.group_elements:
self.group_elements[ge] = new_group_elements[ge]
else:
FreeCAD.Console.PrintError(
" A group with this name exists already.\n")
if self.analysis:
print(' Group meshing.')
new_group_elements = FemMeshTools.get_analysis_group_elements(
self.analysis, self.part_obj)
for ge in new_group_elements:
if ge not in self.group_elements:
self.group_elements[ge] = new_group_elements[ge]
else:
FreeCAD.Console.PrintError(
" A group with this name exists already.\n")
else:
print(' No anlysis members for group meshing.')
print(' {}'.format(self.group_elements))
# mesh regions
self.ele_length_map = {} # { 'ElementString' : element length }
self.ele_node_map = {} # { 'ElementString' : [element nodes] }
if not self.mesh_obj.MeshRegionList:
print(' No mesh regions.')
else:
print(' Mesh regions, we need to get the elements.')
if self.part_obj.Shape.ShapeType == 'Compound':
# see http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&start=40#p149467 and http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&p=149520#p149520
err = "GMSH could return unexpected meshes for a boolean split tools Compound. It is strongly recommended to extract the shape to mesh from the Compound and use this one."
FreeCAD.Console.PrintError(err + "\n")
for mr_obj in self.mesh_obj.MeshRegionList:
if mr_obj.RelativeLength:
if mr_obj.References:
for sub in mr_obj.References:
# print(sub[0]) # Part the elements belongs to
# check if the shape of the mesh region is an element of the Part to mesh, if not try to find the element in the shape to mesh
search_ele_in_shape_to_mesh = False
shape = FreeCAD.ActiveDocument.getObject(
sub[0]).Shape
if not self.part_obj.Shape.isSame(shape):
search_ele_in_shape_to_mesh = True
elems = sub[1]
if search_ele_in_shape_to_mesh:
# we gone try to find the element it in the Shape to mesh and use the found element as elems
ele_shape = FemMeshTools.get_element(
shape, elems
) # the method getElement(element) does not return Solid elements
found_element = FemMeshTools.find_element_in_shape(
self.part_obj.Shape, ele_shape)
if found_element:
elems = found_element
else:
FreeCAD.Console.PrintError(
"One element of the meshregion " +
mr_obj.Name +
" could not be found in the Part to mesh. It will be ignored.\n"
)
# print(elems) # element
if elems not in self.ele_length_map:
# self.ele_length_map[elems] = Units.Quantity(mr_obj.CharacteristicLength).Value
mr_rellen = mr_obj.RelativeLength
if mr_rellen > 1.0:
mr_rellen = 1.0
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" should not use a relative length greater than unity.\n"
)
elif mr_rellen < 0.01:
mr_rellen = 0.01 # Relative length should not be less than 1/100 of base length
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" should not use a relative length smaller than 0.01.\n"
)
self.ele_length_map[
elems] = mr_rellen * self.clmax
else:
FreeCAD.Console.PrintError(
"The element " + elems +
" of the meshregion " + mr_obj.Name +
" has been added to another mesh region.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the reference list is empty.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the CharacteristicLength is 0.0 mm.\n"
)
for eleml in self.ele_length_map:
print(eleml)
ele_shape = FemMeshTools.get_element(
self.part_obj, eleml
) # the method getElement(element) does not return Solid elements
ele_vertexes = FemMeshTools.get_vertexes_by_element(
self.part_obj.Shape, ele_shape)
self.ele_node_map[eleml] = ele_vertexes
print(' {}'.format(self.ele_length_map))
print(' {}'.format(self.ele_node_map))
def get_boundary_layer_data(self):
#Todo: replace all Gmsh word in this functon
# currently only one boundary layer setting object is allowed, but multiple boundary can be selected
# Mesh.CharacteristicLengthMin, must be zero, or a value less than first inflation layer height
self.bl_setting_list = [
] # list of dict, each item map to MeshBoundaryLayer object
self.bl_boundary_list = [
] # to remove duplicated boundary edge or faces
if not self.mesh_obj.MeshBoundaryLayerList:
print(' No mesh boundary layer setting document object.')
else:
print(' Mesh boundary layers, we need to get the elements.')
if self.part_obj.Shape.ShapeType == 'Compound':
# see http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&start=40#p149467 and http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&p=149520#p149520
err = "GMSH could return unexpected meshes for a boolean split tools Compound. It is strongly recommended to extract the shape to mesh from the Compound and use this one."
FreeCAD.Console.PrintError(err + "\n")
for mr_obj in self.mesh_obj.MeshBoundaryLayerList:
if mr_obj.MinimumThickness and Units.Quantity(
mr_obj.MinimumThickness).Value > 0:
if mr_obj.References:
belem_list = []
for sub in mr_obj.References:
# print(sub[0]) # Part the elements belongs to
# check if the shape of the mesh boundary_layer is an element of the Part to mesh, if not try to find the element in the shape to mesh
search_ele_in_shape_to_mesh = False
if not self.part_obj.Shape.isSame(sub[0].Shape):
# print(" One element of the mesh boundary layer " + mr_obj.Name + " is not an element of the Part to mesh.")
# print(" But we going to find it in the Shape to mesh :-)")
search_ele_in_shape_to_mesh = True
for elems in sub[1]:
# print(elems) # elems --> element
if search_ele_in_shape_to_mesh:
# we try to find the element it in the Shape to mesh and use the found element as elems
ele_shape = FemMeshTools.get_element(
sub[0], elems
) # the method getElement(element) does not return Solid elements
found_element = FemMeshTools.find_element_in_shape(
self.part_obj.Shape, ele_shape)
if found_element: # also
elems = found_element
else:
FreeCAD.Console.PrintError(
"One element of the mesh boudary layer "
+ mr_obj.Name +
" could not be found in the Part to mesh. It will be ignored.\n"
)
# print(elems) # element
if elems not in self.bl_boundary_list:
# fetch settings in DocumentObject, fan setting is not implemented
belem_list.append(elems)
self.bl_boundary_list.append(elems)
else:
FreeCAD.Console.PrintError(
"The element " + elems +
" of the mesh boundary layer " +
mr_obj.Name +
" has been added to another mesh boudary layer.\n"
)
setting = {}
setting['hwall_n'] = Units.Quantity(
mr_obj.MinimumThickness).Value
setting['ratio'] = mr_obj.GrowthRate
setting['thickness'] = sum([
setting['hwall_n'] * setting['ratio']**i
for i in range(mr_obj.NumberOfLayers)
])
setting['hwall_t'] = setting[
'thickness'] # setting['hwall_n'] * 5 # tangetial cell dimension
# hfar: cell dimension outside boundary should be set later if some character length is set
if self.clmax > setting[
'thickness'] * 0.8 and self.clmax < setting[
'thickness'] * 1.6:
setting['hfar'] = self.clmax
else:
setting['hfar'] = setting[
'thickness'] # set a value for safety, it may works as background mesh cell size
# from face name -> face id is done in geo file write up
#fan angle setup is not implemented yet
if self.dimension == '2':
setting['EdgesList'] = belem_list
elif self.dimension == '3':
setting['FacesList'] = belem_list
else:
FreeCAD.Console.PrintError(
"boundary layer is only supported for 2D and 3D mesh"
)
self.bl_setting_list.append(setting)
else:
FreeCAD.Console.PrintError(
"The mesh boundary layer: " + mr_obj.Name +
" is not used to create the mesh because the reference list is empty.\n"
)
else:
FreeCAD.Console.PrintError(
"The mesh boundary layer: " + mr_obj.Name +
" is not used to create the mesh because the min thickness is 0.0 mm.\n"
)
print(' {}'.format(self.bl_setting_list))