utils/grid.py: Use own-implemented JIT-optimized "rotate_center()"

Also remove the dependence on "scipy".

3 files changed, 3 insertions, 5 deletions

diff --git a/fg21sim/utils/grid.py b/fg21sim/utils/grid.py
index 7a81ea2..ca9510c 100644
--- a/fg21sim/utils/grid.py
+++ b/fg21sim/utils/grid.py
@@ -8,9 +8,9 @@ Grid utilities.
 
 import numpy as np
 import numba as nb
-from scipy import ndimage
 
 from .draw import ellipse
+from .rotate import rotate_center
 from .healpix import ang2pix_ring
 
 
@@ -136,8 +136,8 @@ def make_grid_ellipse(center, size, resolution, rotation=None):
     gridmap[rr, cc] = 1.0
     if rotation is not None:
         # Rotate the ellipse
-        gridmap = ndimage.rotate(gridmap, angle=rotation, order=1,
-                                 reshape=False)
+        gridmap = rotate_center(gridmap, angle=rotation, interp=True,
+                                reshape=False, fill_value=0.0)
     return (lon, lat, gridmap)
 
 
diff --git a/requirements.txt b/requirements.txt
index 60199f0..a072943 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,5 @@
 numpy
 numba
-scipy
 pandas
 astropy
 healpy
diff --git a/setup.py b/setup.py
index 1fce5c6..99aa4eb 100755
--- a/setup.py
+++ b/setup.py
@@ -81,7 +81,6 @@ setup(
     install_requires=[
         "numpy",
         "numba",
-        "scipy",
         "pandas",
         "astropy",
         "healpy",