core

Frame conventions, physical constants and coordinate maps shared package-wide.

Functions

electron_wavelength_nm(voltage_kv[, v0mod])	Relativistic electron wavelength in nm (EMsoft CalcWaveLength).
interaction_constant(voltage_kv[, v0mod])	Interaction constant sigma in (V nm)^-1 (EMsoft Sigma).
master_pattern_grid(npx[, device, dtype])	Northern-hemisphere unit vectors for every master pattern pixel.
quaternion_to_matrix(q)	Unit quaternions (..., 4), order (a, b, c, d), to matrices (..., 3, 3).
relativistic_correction(voltage_kv)	Relativistic correction factor gamma = 1 + e V / (m0 c^2).
rotate_vectors(q, v)	Rotate vectors v (..., P, 3) by quaternions q (..., 4).
sample_to_detector_matrix(sample_tilt, tilt, ...)	Rows are the detector basis (X_d, Y_d, Z_d) in sample coordinates.
sample_to_detector_tensor(detector, device, ...)	sample_to_detector_matrix() for a detector, as a torch tensor.
sphere_to_square(v[, eps])	Unit vectors (..., 3) to square Lambert coordinates (..., 2), book units.
square_to_sphere(xy[, eps])	Square Lambert coordinates (..., 2, book units) to unit vectors (..., 3).