PolarFilter

PolarFilter converts an image between polar and rectangular coordinates. This can sometimes be useful to apply an effect in the polar domain rather than the rectangular domain. As an example, you can do something similar to the Twirl effect by converting to polar coordinates, performing a Shear with edge wrapping turned on and then converting back to rectangular coordinates.

Polar Filter
PolarFilter

Parameters:

int Type - The type of transform: RECT_TO_POLAR, POLAR_TO_RECT or INVERT_IN_CIRCLE.