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pervognsen/rotate_by_shear_scale.py

Last active February 5, 2019 13:24
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rotate_by_shear_scale.py
def rotate(image, cos_angle, sin_angle):
if abs(cos_angle) < abs(sin_angle):
image, cos_angle, sin_angle = image.T, -sin_angle, cos_angle
inv_cos_angle = 1/cos_angle
yshear(image, -sin_angle)
xyscale(image, cos_angle, inv_cos_angle)
xshear(image, sin_angle * inv_cos_angle)
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