poliastro.core.util

Module Contents

Functions

rotation_matrix(angle, axis)

alinspace(start, stop=None, num=50, endpoint=True)

Return increasing, evenly spaced angular values over a specified interval.

spherical_to_cartesian(v)

Compute cartesian coordinates from spherical coordinates (norm, colat, long). This function is vectorized.

poliastro.core.util.rotation_matrix(angle, axis)
poliastro.core.util.alinspace(start, stop=None, num=50, endpoint=True)

Return increasing, evenly spaced angular values over a specified interval.

poliastro.core.util.spherical_to_cartesian(v)

Compute cartesian coordinates from spherical coordinates (norm, colat, long). This function is vectorized.

\[\begin{split}v = norm \cdot \begin{bmatrix} \sin(colat)\cos(long)\\ \sin(colat)\sin(long)\\ \cos(colat)\\ \end{bmatrix}\end{split}\]
Parameters

v (numpy.ndarray) – Spherical coordinates in 3D (norm, colat, long). Angles must be in radians.

Returns

v – Cartesian coordinates (x,y,z)

Return type

numpy.ndarray