sdynpy.NodeArray

• Defined as: sdynpy.core.sdynpy_geometry.NodeArray

• Module: sdynpy.core.sdynpy_geometry

• Source: GitHub

• Parent: sdynpy.SdynpyArray

• Parent: numpy.ndarray

Signature¶

class sdynpy.NodeArray(shape, buffer=None, offset=0, strides=None, order=None)

Node information array

Use the node_array helper function to create the array.

Attributes¶

data_dtype¶

Methods¶

by_grid¶

• Source: GitHub

def sdynpy.NodeArray.by_grid(self, grid_spacing, x_min=None, y_min=None, z_min=None, x_max=None, y_max=None, z_max=None)

Selects nodes in a grid

Parameters¶

• grid_spacing : float Approximate grid spacing between selected nodes

• x_min : float, optional Minimum X-value of the grid. The default is the minimum node x-coordinate.

• y_min : float, optional Minimun Y-value of the grid. The default is the minimum node y-coordinate.

• z_min : float, optional Minimum Z-value of the grid. The default is the minimum node z-coordinate.

• x_max : float, optional Maximum X-value of the grid. The default is the maximum node x-coordinate.

• y_max : float, optional Maximum Y-value of the grid. The default is the maximum node y-coordinate.

• z_max : float, optional Maximum Z-value of the grid. The default is the maximum node z-coordinate.

Returns¶

• NodeArray

• NodeArray containing the closest nodes to the grid points

by_position¶

• Source: GitHub

def sdynpy.NodeArray.by_position(self, position_array)

Select node by closest position

Parameters¶

• position_array : np.ndarray A (...,3) shape array containing positions of nodes to keep

Returns¶

• NodeArray

• NodArray containing nodes that were closest to the positions in

• position_array.

from_unv¶

• Source: GitHub

def sdynpy.NodeArray.from_unv(unv_data_dict, combine=True)

Load NodeArrays from universal file data from read_unv

Parameters¶

• unv_data_dict : dict Dictionary containing data from read_unv

• combine : bool, optional If True, return as a single NodeArray

Returns¶

• output_arrays : NodeArray Nodes read from unv

global_coordinate¶

• Source: GitHub

def sdynpy.NodeArray.global_coordinate(self, cs_array)

Get the global coordinate of each node

Parameters¶

• cs_array : CoordinateSystemArray CoordinateSystemArray consisting of the local coordinate systems for each node

Returns¶

• points : np.ndarray Coordinates of the nodes in the global coordinate system.

project_to_minimum_plane¶

• Source: GitHub

def sdynpy.NodeArray.project_to_minimum_plane(coordinates, return_3D=True)

Projects coordinates to a single best-fit plane

Parameters¶

• coordinates : np.ndarray A (...,3) coordinate array.

• return_3D : bool, optional If True, return the 3D coordinates of the projected points. Otherwise return the projected 2D coordinate. The default is True.

Returns¶

• np.ndarray

• Points projected to a best-fit plane.

reduce¶

• Source: GitHub

def sdynpy.NodeArray.reduce(self, node_list)

Keep only nodes that are contained in node_list

Parameters¶

• node_list : iterable Iterable containing nodes to keep.

Returns¶

• NodeArray

• NodeArray containing only nodes in node_list.

triangulate¶

• Source: GitHub

def sdynpy.NodeArray.triangulate(self, cs_array, projection_function=None, return_element_array=True, element_color=1, condition_threshold=None)

Creates elements for a node set using Delaunay Triangulation

Parameters¶

• cs_array : CoordinateSystemArray CoordinateSystemArray containing coordinate systems for each node.

• projection_function : function, optional Function to use to project 3D coordinates to 2D coordinates for triangulation. The default is None.

• return_element_array : bool, optional Returns an ElementArray if True, otherwise it simply returns the triangle simplices. The default is True.

• element_color : np.ndarray or int, optional Integers representing colors applied to the elements. The default is 1.

• condition_threshold : float, optional Condition number threshold used to remove triangles that are poorly shaped. The default is None.

Returns¶

• ElementArray or np.ndarray

• ElementArray containing elements or np.ndarray containing triangle

• simplices.