Swirl node
The Swirl node is variadic and applies a swirl effect on its inputs.

Inputs
The Swirl node accepts one or more RGBA inputs, interpreted as a heightmap.
Outputs
The Swirl node outputs the transformed images as RGBA.
Parameters
The Swirl node has 3 parameters:
the coordinates of the center of the effect.
the Angle of the swirl effect.
the Radius of the swirl effect.
an option to make the effect tileable.
Example images
