Added Zigzag, Bulge/Pinch, and Swirl shaders.

[Radegast-FFXIV]

Added 3 distortion shaders.:

Swirl

Twists a part of the screen around a specific coordinate. Can be animated to swirl clockwise and anticlockwise.
Parameters

• radius - The size of the area to be affected. Most effective range is between 0.0 and 1.0.
• angle - The angle to twist the affected area.
• center x - The x-coordinate to place the effect on. The range should sit between 0.0 (left side) and 1.0 (right side).
• center y - The y-coordinate to place the effect on. The range should sit between 0.0 (top side) and 1.0 (bottom side).
• animate - Animates the effect, oscillating between clockwise and anticlockwise based on the angle.
• invert - Inverts the distortion, causing the outermost edges to be the most distorted.

Zigzag

Similar to Swirl, but performs alternating oscillations.
Parameters

• radius - The size of the area to be affected. Most effective range is between 0.0 and 1.0.
• angle - The angle to twist the affected area, also affects the period. It's recommended to use the shader sliders for this variable.
• amplitude - The amount of distortion to apply.
• period - How often to oscillate on the distortion. A lower value means more frequent oscillations. The recommended range is between 0.1 and 3.0.
• center x - The x-coordinate to place the effect on. The range should sit between 0.0 (left side) and 1.0 (right side).
• center y - The y-coordinate to place the effect on. The range should sit between 0.0 (top side) and 1.0 (bottom side).
• animate - Enables/disables animation; animates by different variables. (0 - None; 1 - Animate by amplitude; 2 - Animate by phase)

Bulge/Pinch

Expands or contracts the pixels around a point.
Parameters

• radius - The size of the area to be affected. Most effective range is between 0.0 and 1.0.
• magnitude - The magnitude of the effect. A positive value creates a bulge at the selected area while a negative value creates a pinching effect. Recommended range is -1.0 to 1.0.
• center x - The x-coordinate to place the effect on. The range should sit between 0.0 (left side) and 1.0 (right side).
• center y - The y-coordinate to place the effect on. The range should sit between 0.0 (top side) and 1.0 (bottom side).
• animate - Animates the effect, oscillating between bulging and pinching of the same magnitude.