rotation#
- emg3d.electrodes.rotation(azimuth, elevation, deg=True)[source]#
Rotation factors for RHS coordinate system with positive z upwards.
The rotation factors multiplied with the length yield the corresponding Cartesian coordinates. (The rotation factors correspond to the rotation of a unit radius of length 1.)
Definition of spherical coordinates:
azimuth θ: anticlockwise from x-axis towards y-axis, (-180°, +180°].
elevation φ: anticlockwise (upwards) from the xy-plane towards z-axis [-90°, +90°].
radius (m).
Definition of Cartesian coordinates:
x is Easting;
y is Northing;
z is positive upwards (RHS).
- Parameters:
- azimuthfloat
Anticlockwise angle from x-axis towards y-axis.
- elevationfloat
Anticlockwise (upwards) angle from the xy-plane towards z-axis.
- degbool, default: True
Angles are in degrees if True, radians if False.
- Returns:
- rotndarray
Rotation factors (x, y, z).