> ## Documentation Index
> Fetch the complete documentation index at: https://docs.otter-shell.org/llms.txt
> Use this file to discover all available pages before exploring further.

# otter-geo

> Integer geometry types for Otter Shell layout: Point, Rect, Padding, Transform, Align.

`otter-geo` is 2D geometry for layout and hit testing. Integer math on hot paths, no render deps.

`otter-ui`, `otter-render`, `otter-wayland`, and `otter-config-types` all pull types from here.

## Quick example

```zig theme={null}
const geo = @import("otter_geo");

const rect = geo.Rect{ .x = 0, .y = 0, .width = 100, .height = 40 };
const inner = geo.Point{ .x = 20, .y = 10 };

if (rect.containsPoint(inner)) {
    const shrunk = rect.removePadding(geo.Padding.uniform(8)) orelse return;
    _ = shrunk;
}
```

## Documentation map

<CardGroup cols={2}>
  <Card title="Types and operations" icon="ruler-combined" href="/developers/libraries/otter-geo/types-and-operations">
    `Point`, `Rect`, `Circle`, `Padding`, `Align`, and `Transform`.
  </Card>
</CardGroup>

## Design rules

* Coordinates are `u16` or `u31` depending on type. No floats in layout.
* `Rect` helpers cover intersection, union, inset, and centering.
* `Transform` uses 16.16 fixed-point rotation for integer-safe transforms.

## Dependencies

None.