def filter(self, img):
try:
return core.radian_warp(img, self.formula, self.antialias, self.empty_color)
except:
pass
def radian_formula(x, y):
'''transform formula
func is a function that like f(r, phi) => (r, phi)
'''
r = sqrt(x ** 2 + y ** 2)
phi = atan2(y, x)
r, phi = self.formula(r, phi)
xnew = r * cos(phi)
ynew = r * sin(phi)
return xnew, ynew
warp = LensWarpEffect(radian_formula, self.antialias)
return warp(img)
