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Use astropy pixel_to_pixel in calc_pixmap #161

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Use astropy pixel_to_pixel in calc_pixmap #161

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7 changes: 7 additions & 0 deletions CHANGES.rst
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Expand Up @@ -4,6 +4,13 @@
Release Notes
=============


2.0.1 (unreleased)
==================

- Use ``astropy``'s ``pixel_to_pixel()`` in ``utils.calc_pixmap()``. [#161]


2.0.0 (2024-10-23)
==================

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4 changes: 3 additions & 1 deletion drizzle/utils.py
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Expand Up @@ -2,6 +2,8 @@

import numpy as np

from astropy.wcs.utils import pixel_to_pixel

__all__ = ["calc_pixmap", "decode_context", "estimate_pixel_scale_ratio"]

_DEG2RAD = math.pi / 180.0
Expand Down Expand Up @@ -74,7 +76,7 @@ def calc_pixmap(wcs_from, wcs_to, shape=None):
)

y, x = np.indices(shape, dtype=np.float64)
x, y = wcs_to.world_to_pixel_values(*wcs_from.pixel_to_world_values(x, y))
x, y = pixel_to_pixel(wcs_from, wcs_to, x, y)
pixmap = np.dstack([x, y])
return pixmap

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2 changes: 1 addition & 1 deletion pyproject.toml
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Expand Up @@ -7,7 +7,7 @@ authors = [
]
dependencies = [
"numpy",
"astropy",
"astropy>=5.0",
]
dynamic = [
"version",
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