def test_rotate_grid_one_storm_object_arbitrary(self):
"""Ensures correct output from _rotate_grid_one_storm_object.
In this case, storm motion is in an arbitrary direction (not 0, 90, 180,
270, or NaN degrees).
"""
this_latitude_matrix_deg, this_longitude_matrix_deg = (
storm_images._rotate_grid_one_storm_object(
centroid_latitude_deg=ONE_CENTROID_LATITUDE_DEG,
centroid_longitude_deg=ONE_CENTROID_LONGITUDE_DEG,
eastward_motion_m_s01=EASTWARD_MOTION_M_S01,
northward_motion_m_s01=NORTHWARD_MOTION_M_S01,
num_storm_image_rows=NUM_FULL_GRID_ROWS_ROTATED,
num_storm_image_columns=NUM_FULL_GRID_COLUMNS_ROTATED,
storm_grid_spacing_metres=ROTATED_GRID_SPACING_METRES))
self.assertTrue(
numpy.allclose(this_latitude_matrix_deg,
ROTATED_LAT_MATRIX_ARBITRARY_MOTION_DEG,
atol=TOLERANCE))
self.assertTrue(
numpy.allclose(this_longitude_matrix_deg,
ROTATED_LNG_MATRIX_ARBITRARY_MOTION_DEG,
atol=TOLERANCE))
def test_rotate_grid_one_storm_object_zero_motion(self):
"""Ensures correct output from _rotate_grid_one_storm_object.
In this case, storm motion is zero (stationary).
"""
(this_latitude_matrix_deg, this_longitude_matrix_deg
) = storm_images._rotate_grid_one_storm_object(
centroid_latitude_deg=ONE_CENTROID_LATITUDE_DEG,
centroid_longitude_deg=ONE_CENTROID_LONGITUDE_DEG,
eastward_motion_m_s01=0., northward_motion_m_s01=0.,
num_storm_image_rows=NUM_FULL_GRID_ROWS_ROTATED,
num_storm_image_columns=NUM_FULL_GRID_COLUMNS_ROTATED,
storm_grid_spacing_metres=ROTATED_GRID_SPACING_METRES)
self.assertTrue(numpy.allclose(
this_latitude_matrix_deg, ROTATED_LAT_MATRIX_ZERO_MOTION_DEG,
atol=TOLERANCE))
self.assertTrue(numpy.allclose(
this_longitude_matrix_deg, ROTATED_LNG_MATRIX_ZERO_MOTION_DEG,
atol=TOLERANCE))