Model.line_mesh_decimator

Model.line_mesh_decimator(collection, element_size, anchor_nodes_collection=Collection(), chordal_deviation=0.000000, consider_edge_conformal_2D_elems=0, feature_angle=0.000000, ignore_diameter=0.000000, per_chain_min_edge_count=0, turning_angle=0.000000)

Decimate 1D elements to user given element size.

Parameters:

• collection (Collection) – he collection containing the input 1Ds entities to coarsen. Valid entities are elements and components.

• element_size (double) – The size to use for coarsening.

• anchor_nodes_collection (Collection) – The collection containing the anchor nodes.

• chordal_deviation (double) – The chordal deviation value to use for decimation.

• consider_edge_conformal_2D_elems (unsigned int) –

  0 - If 2D elements are also selected along with the 1D elements, the attached 2Ds will be not modified to maintain mesh conformality.

  1 - If 2D elements are also selected along with the 1D elements, the attached 2Ds will be modified to maintain mesh conformality.

• feature_angle (double) – The face deviation cutoff for decimation. Useful when 2D elements are selected, in addition to edge/1D elements.

• ignore_diameter (double) – If any isolated connected cluster is contained within this size it will be deleted.

• per_chain_min_edge_count (int) – Controls the number of edges to be retained per chain in the given edge/1D element input.

• turning_angle (double) – node will be anchored if only two 1D elements that are connected to the node make an angle greater than this value.

Example

Coarsen elements in component with ID 100 to size 10.0, using nodes with IDs 1-10 as anchors

import hm
import hm.entities as ent

model = hm.Model()

component_col = hm.Collection(model, ent.Component, [100])

node_col = hm.Collection(model, ent.Node, list(range(1, 11)))

model.line_mesh_decimator(
    collection=component_col,
    element_size=10.0,
    anchor_nodes_collection=node_col,
    chordal_deviation=0.15,
    turning_angle=30.0,
    ignore_diameter=4.0,
)