Interface for elements that can be clipped if they are under an [[IClipper].
| rectTransform | RectTransform of the clippable. |
| Cull | Clip and cull the IClippable given the clipRect. |
| RecalculateClipping | Called when the state of a parent IClippable changes. |
| SetClipRect | Set the clip rect for the IClippable. |