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64c992d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | """Decodes the release's fixed-point integer encoding for shieldings and similar fields.
Values are stored as whole numbers equal to the real value times `scale`, with a reserved marker for
values that were never computed. This turns them back into real values (NaN where missing); float
input passes through untouched, so the same decoder reads either the released int32 encoding or an
older plain-float copy.
"""
import numpy as np
FIXED_POINT_SCALE = 1e4
MISSING_MARKER = -2147483648
def decode_fixed_point(values, scale=FIXED_POINT_SCALE, missing_marker=MISSING_MARKER):
"""Convert fixed-point integers back to real-valued floats, mapping the missing marker to NaN."""
values = np.asarray(values)
if np.issubdtype(values.dtype, np.integer):
out = values.astype(np.float64) / scale
out[values == missing_marker] = np.nan
return out
return np.asarray(values, dtype=np.float64)
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