Swirls the image around a center point in a vortex pattern.

Parameters

• Strength - How strongly to whirl pixels around the vortex. Higher values mean pixels make more rotations around the screen.
• Center - The center point of all vortex rotations, as a normalized screen coordinate.
• Offset - How far to offset the image prior to performing the vortex effect.
• Rotation - How much to rotate the entire screen uniformly post-vortex, as a proportion between no rotation and one full rotation.