Twirl
The Twirl image effect distorts the rendered image within a circular region. The pixels at the centre of the circle are rotated by a specified angle; the rotation for other pixels in the circle decreases with distance from the centre, diminishing to zero at the circle’s edge.
Twirl is similar to another image effect called Vortex, although vortex distorts the image around a central circle rather than a single point.
As with the other image effects, this effect is only available in Unity Pro and you must have the Pro Standard Assets installed before it becomes available.
Properties
| Property: | Function: |
|---|---|
| Radius | The radius of the ellipse where image distortion occurs, given in normalized screen coordinates (ie, a radius of 0.5 is half the size of the screen). |
| Angle | The angle of rotation at the centre point. |
| Center | The point at the centre of the circle where distortion occurs. |
Hardware Support
This effect requires a graphics card that supports Shader Model 2. See the Graphics Hardware Capabilities and Emulation page for further details and a list of compliant hardware.