Mesh¶

Declaration¶

class declaracad.occ.mesh.Mesh(parent=None, **kwargs)[source]¶

Bases: Shape

A Mesh

Attributes:

source: Shape: Either a shape to mesh or a datasource. Alternatively the shape can be nested.
algorithm: String: The meshing algorithm to use to generate the mesh.

Methods

`activate_bottom_up`()	Initialize the proxy on the bottom-up activation pass.
`activate_proxy`()	Activate the proxy object tree.
`activate_top_down`()	Initialize the proxy on the top-down activation pass.
`child_added`(child)	A reimplemented child added event handler.
`child_moved`(child)	A method invoked when a child is moved in the object.
`child_removed`(child)	A reimplemented child removed event handler.
`colorize_mesh`()	This is invoked after the mesh is computed.
`destroy`()	A reimplemented destructor.
`find`(name[, regex])	Find the first object in the subtree with the given name.
`find_all`(name[, regex])	Find all objects in the subtree with the given name.
`find_element`(id)	Find the node with the given ID.
`find_face`(id)	Find the face element with the given ID.
`find_node`(id)	Find the node with the given ID.
`find_volume`(id)	Find the volume element with the given ID.
`freeze`	Freeze the atom to prevent further modifications to its attributes.
`get_member`	Get the named member for the atom.
`has_observer`	Get whether the atom has the given observer for a given topic.
`has_observers`	Get whether the atom has observers for a given topic.
`initialize`()	A reimplemented initializer.
`insert_children`(before, insert)	Insert children into this object at the given location.
`members`()	Get the members dictionary for the type.
`notifications_enabled`	Get whether notification is enabled for the atom.
`notify`	Call the registered observers for a given topic with positional and keyword arguments.
`observe`	Register an observer callback to observe changes on the given topic(s).
`parent_changed`(old, new)	A method invoked when the parent of the object changes.
`prepare_mesh`(gen, mesh, shape)	This is invoked before the mesh is computed.
`process_mesh`()	Process the generated mesh.
`render`()	Generates and returns the actual shape from the declaration.
`root_object`()	Get the root object for this hierarchy.
`set_notifications_enabled`	Enable or disable notifications for the atom.
`set_parent`(parent)	Set the parent for this object.
`suppress_notifications`()	Disable member notifications within in a context.
`traverse`([depth_first])	Yield all of the objects in the tree, from this object down.
`traverse_ancestors`([root])	Yield all of the objects in the tree, from this object up.
`unobserve`	Unregister an observer callback for the given topic(s).

export_type
node_type

Examples

enamldef Case(Part):

Box: box:: pass
Mesh:: source = box

colorize_mesh()[source]¶: This is invoked after the mesh is computed. The topology can be used to apply colors to nodes and elements.

disabled¶: Disable meshing

export_filename¶: If given, write the mesh to a file

export_type¶: Export type

find_element(id) → Element[source]¶: Find the node with the given ID.

find_face(id) → Element[source]¶: Find the face element with the given ID.

find_node(id) → Node[source]¶: Find the node with the given ID.

find_volume(id) → Element[source]¶: Find the volume element with the given ID.

options¶: Meshing options

prepare_mesh(gen, mesh, shape)[source]¶

This is invoked before the mesh is computed. It should be defined to prepare the meshing parameters.

Parameters:

gen: SMESH_Gen: The mesh generator
mesh: SMESH_Mesh: The mesh handle
shape: TopoDS_Shape: The shape being meshed

process_mesh()[source]¶

Process the generated mesh. This is invoked before colorizing.

If you want to use your own FEA, this is a good place to hook in.

proxy¶: Reference to the implementation control

source¶: May be either a shape to mesh or a numpy array

Implementation¶

class declaracad.occ.impl.occ_mesh.OccMesh[source]¶

Bases: OccDependentShape, ProxyMesh

Implementation is based on pySMESH by trelau

Attributes:

ais_shape
builder
declaration
displayed
element_builder
elements
faces
gen
is_active: Test whether or not the proxy is fully activated.
location
mesh
node_builder
nodes
reference
shape
smesh_ds
source
tdf_label
topology
viewer
volumes
vs_link

Methods

`activate_bottom_up`()	Activate the proxy tree for the bottom-up pass.
`activate_top_down`()	Activate the proxy for the top-down pass.
`child_added`(child)	Handle a child being added to the object.
`child_removed`(child)	Handle a child being removed from the object.
`child_shapes`()	Iterator of all child shapes
`children`()	Get the child objects for this object.
`clear_cache`()	Free up cached elements
`create_shape`()	Create the toolkit shape for the proxy object.
`destroy`()	Cleanup resources
`export`(filename, export_type, *args)	Export the mesh.
`find_element`(key)	Find the Element with the given ID.
`find_face`(key)	Find the Face with the given ID.
`find_node`(key)	Find the Node with the given ID.
`find_volume`(key)	Find the Volume with the given ID.
`freeze`	Freeze the atom to prevent further modifications to its attributes.
`get_first_child`()	Return shape to apply the operation to.
`get_member`	Get the named member for the atom.
`get_transform`()	Create a transform which rotates the default axis to align with the normal given by the position
`has_observer`	Get whether the atom has the given observer for a given topic.
`has_observers`	Get whether the atom has observers for a given topic.
`init_layout`()	Initialize the layout of the toolkit shape.
`init_shape`()	Initialize the state of the toolkit widget.
`members`()	Get the members dictionary for the type.
`notifications_enabled`	Get whether notification is enabled for the atom.
`notify`	Call the registered observers for a given topic with positional and keyword arguments.
`observe`	Register an observer callback to observe changes on the given topic(s).
`parent`()	Get the parent proxy object for this object.
`set_notifications_enabled`	Enable or disable notifications for the atom.
`suppress_notifications`()	Disable member notifications within in a context.
`unobserve`	Unregister an observer callback for the given topic(s).
`update_shape`([change])	Must be implmented in subclasses to create the shape when the dependent shapes change.
`update_style`()	Update mesh colors.
`walk_shapes`([ignore_display])	Iterator of all child shapes

clear_focus
ensure_hidden
ensure_visible
focus_next_child
focus_previous_child
get_bounding_box
has_focus
on_shape_changed
parent_shape
request_relayout
restyle
set_algorithm
set_axis
set_background
set_color
set_direction
set_disabled
set_display
set_element_color
set_enabled
set_focus
set_font
set_foreground
set_maximum_size
set_minimum_size
set_node_color
set_position
set_source
set_status_tip
set_texture
set_tool_tip
set_transparency
set_visible
update_mesh

ais_shape¶: The shape that was shown on the screen

clear_cache()[source]¶: Free up cached elements

destroy()[source]¶: Cleanup resources

export(filename: str, export_type: str, *args)[source]¶

Export the mesh. The extension is added automatically

Parameters:

filename: String: The base filename (excluding the extension)
export_type: String: The export type. Must map to one of the Export functions

find_element(key: int | object) → Element[source]¶: Find the Element with the given ID.

find_face(key: int | object) → Element[source]¶: Find the Face with the given ID.

find_node(key: int | object) → Node[source]¶: Find the Node with the given ID.

find_volume(key: int | object) → Element[source]¶: Find the Volume with the given ID.

nodes¶: Cached items

topology¶: Topology explorer of the shape

update_shape(change=None)[source]¶: Must be implmented in subclasses to create the shape when the dependent shapes change.

update_style()[source]¶: Update mesh colors.