pyCGM_Single.pyCGM.wristJointCenter

pyCGM_Single.pyCGM.wristJointCenter(frame, shoulderJC, wand, elbowJC)

Calculate the Wrist joint axis ( Radius) function.

Takes in the elbow axis to calculate each wrist joint axis and returns it.

Parameters

framedict

Dictionaries of marker lists.

shoulderJCarray

The x,y,z position of the shoulder joint center.

elbowJCarray

The x,y,z position of the elbow joint center.

wandarray

The x,y,z position of the wand.

Returns

origin, axisarray

Returns the Shoulder joint center and axis in three array

return = [[R_wrist_JC_x, R_wrist_JC_y, R_wrist_JC_z],

[L_wrist_JC_x,L_wrist_JC_y,L_wrist_JC_z], [[[R_wrist x axis, x,y,z position], [R_wrist y axis, x,y,z position], [R_wrist z axis, x,y,z position]], [[L_wrist x axis, x,y,z position], [L_wrist y axis, x,y,z position], [L_wrist z axis, x,y,z position]]]]

Examples

>>> import numpy as np
>>> from .pyCGM import wristJointCenter
>>> frame = {'RSHO': np.array([428.88, 270.55, 1500.73]),
...          'LSHO': np.array([68.24, 269.01, 1510.10]),
...          'RELB': np.array([658.90, 326.07, 1285.28]),
...          'LELB': np.array([-156.32, 335.25, 1287.39]),
...          'RWRA': np.array([776.51,495.68, 1108.38]),
...          'RWRB': np.array([830.90, 436.75, 1119.11]),
...          'LWRA': np.array([-249.28, 525.32, 1117.09]),
...          'LWRB': np.array([-311.77, 477.22, 1125.16])}
>>> wand = [[255.92, 364.32, 1460.62],
...        [256.42, 364.27, 1460.61]]
>>> shoulderJC = [np.array([429.66, 275.06, 1453.95]),
...               np.array([64.51, 274.93, 1463.63])]
>>> elbowJC = [[np.array([633.66, 304.95, 1256.07]),
...           np.array([-129.16, 316.86, 1258.06])],
...           [[[633.81, 303.96, 1256.07],
...           [634.35, 305.05, 1256.79],
...           [632.95, 304.85, 1256.77]],
...           [[-129.32, 315.88, 1258.00],
...           [-128.45, 316.79, 1257.37],
...           [-128.49, 316.72, 1258.78]]],
...           [[793.32, 451.29, 1084.43],
...           [-272.45, 485.80, 1091.36]]]
>>> [np.around(arr, 2) for arr in wristJointCenter(frame,shoulderJC,wand,elbowJC)] 
[array([[ 793.32,  451.29, 1084.43],
[-272.45,  485.8 , 1091.36]]), array([[[ 793.76,  450.45, 1084.12],
[ 794.01,  451.39, 1085.15],
[ 792.75,  450.76, 1085.05]],
[[-272.92,  485.01, 1090.96],
[-271.73,  485.73, 1090.66],
[-271.93,  485.19, 1091.96]]])]