input floating-point array of magnitudes of 2D vectors; it can be an empty matrix (=Mat()), in this case, the function assumes that all the magnitudes are =1; if it is not empty, it must have the same size and type as angle.
input floating-point array of angles of 2D vectors.
OptionalangleInDegrees: boolean
when true, the input angles are measured in degrees, otherwise, they are measured in radians.
Calculates x and y coordinates of 2D vectors from their magnitude and angle.