> For the complete documentation index, see [llms.txt](https://docs.flatredball.com/flatredball/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flatredball.com/flatredball/glue-reference/objects/object-types/glue-reference-axisalignedrectangle.md).

# AxisAlignedRectangle

### Introduction

AxisAlignedRectangles are rectangular shapes which cannot be rotated. AxisAlignedRectangles can be used as collision objects. For information on using AxisAlignedRectangles in code, see the [AxisAlignedRectangle code page](https://github.com/flatredball/FlatRedBallDocs/blob/main/frb/docs/index.php).

### Adding an AxisAlignedRectangle to an entity

To add an AxisAlignedRectangle to an entity:

1. Expand your entity
2. Right-click on the Objects item
3. Select "Add Object"
4. Enter the name "Collision"
5. Set the SourceType to "FlatRedBallType
6. Set the SourceClassType to "AxisAlignedRectangle"![AxisAlignedRectangleInGlue.png](/files/A8gKcIAKa1c3F4ct30TP)


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