BendNetwork

class compas_bender.datastructures.BendNetwork

Bases: Graph

Extension of the COMPAS network data structure for managing the relationships between the elements of a bending-active structure and their individual attributes.

A BendNetwork adds the following default attributes for nodes and edges (there are others, but they are read-only and will be populated by the solvers):

nodes

• is_anchor : False

• px : 0.0

• py : 0.0

• pz : 0.0

edges

• qpre : 1.0

• fpre : 0.0

• lpre : 0.0

• linit : 0.0

• E : 0.0

• radius : 0.0

• thickness : 0.0

These attributes define the properties of the struts, ties, cablenets, and bending-active splines in the system. And a re then used by compas_bender.bend.bend_splines() to solve for equilibrium under the given boundary conditions.

Methods

edge_line	Return the line segment corresponding to an edge.
node_point	Return the point corresponding to the location of a node.
node_reaction	Return the vector representing the reaction force at an anchored node.
node_residual	Return the vector representing the residual force at a node.

Inherited Methods

ToString	Converts the instance to a string.
aabb	Calculate the axis aligned bounding box of the graph.
add_edge	Add an edge and specify its attributes.
add_node	Add a node and specify its attributes (optional).
adjacency_matrix	Creates a node adjacency matrix from a Graph datastructure.
clear	Clear all the graph data.
complement	Generate the complement of a graph.
compute_aabb	Compute the axis-aligned bounding box of the datastructure.
compute_obb	Compute the oriented bounding box of the datastructure.
connected_edges	Get groups of connected edges.
connected_nodes	Get groups of connected nodes.
connectivity_matrix	Creates a connectivity matrix from a Graph datastructure.
copy	Make an independent copy of the data object.
count_crossings	Count the number of crossings (pairs of crossing edges) in the graph.
degree	Return the number of neighbors of a node.
degree_in	Return the numer of incoming neighbors of a node.
degree_matrix	Creates a degree matrix from a Graph datastructure.
degree_out	Return the number of outgoing neighbors of a node.
delete_edge	Delete an edge from the graph.
delete_node	Delete a node from the graph.
edge_attribute	Get or set an attribute of an edge.
edge_attributes	Get or set multiple attributes of an edge.
edge_coordinates	Return the coordinates of the start and end point of an edge.
edge_direction	Return the direction vector of an edge.
edge_end	Return the end point of an edge.
edge_index	Returns a dictionary that maps edge identifiers (i.e. pairs of vertex identifiers) to the corresponding edge index in a list or array of edges.
edge_length	Return the length of an edge.
edge_midpoint	Return the location of the midpoint of an edge.
edge_point	Return the point at a parametric location along an edge.
edge_sample	Get the identifiers of a set of random edges.
edge_start	Return the start point of an edge.
edge_vector	Return the vector of an edge.
edges	Iterate over the edges of the graph.
edges_attribute	Get or set an attribute of multiple edges.
edges_attributes	Get or set multiple attributes of multiple edges.
edges_where	Get edges for which a certain condition or set of conditions is true.
edges_where_predicate	Get edges for which a certain condition or set of conditions is true using a lambda function.
embed_in_plane	Embed the graph in the plane.
exploded	Explode the graph into its connected components.
find_crossings	Identify all pairs of crossing edges in a graph.
find_cycles	Find the faces of a graph.
from_edges	Create a new graph instance from information about the edges.
from_json	Construct an object of this type from a JSON file.
from_jsonstring	Construct an object of this type from a JSON string.
from_lines	Construct a graph from a set of lines represented by their start and end point coordinates.
from_networkx	Create a new graph instance from a NetworkX DiGraph instance.
from_nodes_and_edges	Construct a graph from nodes and edges.
from_obj	Construct a graph from the data contained in an OBJ file.
from_pointcloud	Construct a graph from random connections between the points of a pointcloud.
gkey_node	Returns a dictionary that maps geometric keys of a certain precision to the identifiers of the corresponding nodes.
has_edge	Verify if the graph contains a specific edge.
has_node	Verify if a specific node is present in the graph.
index_edge	Returns a dictionary that maps edges in a list to the corresponding vertex identifier pairs.
index_node	Returns a dictionary that maps the indices of a node list to keys in a node dictionary.
is_connected	Verify that the graph is connected.
is_crossed	Verify if a graph has crossing edges.
is_leaf	Verify if a node is a leaf.
is_node_connected	Verify if a specific node is connected.
is_planar	Check if the graph is planar.
is_planar_embedding	Verify that a graph is embedded in the plane without crossing edges.
is_xy	Verify that a graph lies in the XY plane.
join_edges	Join the edges incidental on the given node, if there are exactly two incident edges.
laplacian_matrix	Creates a Laplacian matrix from a Graph datastructure.
leaves	Return all leaves of the graph.
neighborhood	Return the nodes in the neighborhood of a node.
neighbors	Return the neighbors of a node.
neighbors_in	Return the incoming neighbors of a node.
neighbors_out	Return the outgoing neighbors of a node.
node_attribute	Get or set an attribute of a node.
node_attributes	Get or set multiple attributes of a node.
node_coordinates	Return the coordinates of a node.
node_edges	Return the edges connected to a node.
node_gkey	Returns a dictionary that maps node identifiers to the corresponding geometric key up to a certain precision.
node_index	Returns a dictionary that maps node identifiers to their corresponding index in a node list or array.
node_laplacian	Return the vector from the node to the centroid of its 1-ring neighborhood.
node_neighborhood_centroid	Return the computed centroid of the neighboring nodes.
node_sample	Get a list of identifiers of a random set of n nodes.
nodes	Iterate over the nodes of the graph.
nodes_attribute	Get or set an attribute of multiple nodes.
nodes_attributes	Get or set multiple attributes of multiple nodes.
nodes_where	Get nodes for which a certain condition or set of conditions is true.
nodes_where_predicate	Get nodes for which a certain condition or set of conditions is true using a lambda function.
number_of_edges	Compute the number of edges of the graph.
number_of_nodes	Compute the number of nodes of the graph.
obb	Calculate the oriented bounding box of the graph.
rotate	Rotate the datastructure.
rotated	Returns a rotated copy of this geometry.
scale	Scale the datastructure.
scaled	Returns a scaled copy of this geometry.
sha256	Compute a hash of the data for comparison during version control using the sha256 algorithm.
shortest_path	Find the shortest path between two nodes using the A* algorithm.
smooth	Smooth a graph by moving every free node to the centroid of its neighbors.
split_edge	Split and edge by inserting a node along its length.
summary	Return a summary of the graph.
to_json	Convert an object to its native data representation and save it to a JSON file.
to_jsonstring	Convert an object to its native data representation and save it to a JSON string.
to_lines	Return the lines of the graph as pairs of start and end point coordinates.
to_networkx	Create a new NetworkX graph instance from a graph.
to_nodes_and_edges	Return the nodes and edges of a graph.
to_obj	Write the graph to an OBJ file.
to_points	Return the coordinates of the graph.
transform	Transform all nodes of the graph.
transform_numpy	Transforms the data structure.
transformed	Returns a transformed copy of this data structure.
transformed_numpy	Returns a transformed copy of this data structure.
translate	Translate the datastructure.
translated	Returns a translated copy of this geometry.
unset_edge_attribute	Unset the attribute of an edge.
unset_node_attribute	Unset the attribute of a node.
update_default_edge_attributes	Update the default edge attributes.
update_default_node_attributes	Update the default node attributes.
validate_data	Validate the data against the object's data schema.