Function fromCenter

fromCenter(
    origin: Geometry.Point,
    width: number,
    height: number,
): Geometry.RectPositioned
Initialises a rectangle based on its center, a width and height
```
import { Rects } from "https://unpkg.com/ixfx/dist/geometry.js";

// Rectangle with center at 50,50, width 100 height 200
Rects.fromCenter({x: 50, y:50}, 100, 200);
```
Parameters
- origin: Geometry.Point
- width: number
- height: number
Returns Geometry.RectPositioned