from_string

Specification

Location	Author	Maintained by
isl/math/quaternion.py	Kenny Erleben	DIKU

Purpose & Params

The purpose of this module is to convert string to operations. The convertible operations is:

• “identity” : Converts to the identity
• “rx: < degree >” : Converts to a quatertion rotating < degree > degrees
  around the x axis.
• “ry: < degree >” : Converts to a quatoration rotating < degree > degrees
  around the y axis.
• “rz: < degree >” : Converts to a quatertion rotating < degree > degrees
  around the z axis.
• “ru: < degree >: < axis >” : Converts to a quatertion< degree > degrees
  around the < axis > axis.
• “[x1,x2,…xN]” : Converts to an array of size N.

Example

    import numpy as np
    degree  = "90"
    axis    = "[1,0,0]"
    quaternion = from_string(f"ru: {degree}:{axis}")
    print(quaternion)

output:

   array([0.70710678, 0.70710678, 0.        , 0.        ])