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Nhom6_Job19/Project/Library/PackageCache/com.unity.ugui@1.0.0/Documentation~/script-RectMask2D.md

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RectMask2D

A RectMask2D is a masking control similar to the Mask control. The mask restricts the child elements to the rectangle of the parent element. Unlike the standard Mask control it has some limitations, but it also has a number of performance benefits.

Description

A common use of a RectMask2D is to show small sections of a larger area. Using the RectMask2D to frame this area.

The limitations of RectMask2D control are:

  • It only works in 2D space
  • It will not properly mask elements that are not coplanar

The advantages of RectMask2D are:

  • It does not use the stencil buffer
  • No extra draw calls
  • No material changes
  • Fast performance