# Rectangle<T extends num>.fromPoints constructor

Rectangle<T extends num>.fromPoints(Point<T> a, Point<T> b)

Create a rectangle spanned by the points `a` and `b`;

The rectangle contains the points with x-coordinate between `a.x` and `b.x`, and with y-coordinate between `a.y` and `b.y`, both inclusive.

If the distance between `a.x` and `b.x` is not representable (which can happen if one or both is a double), the actual right edge might be slightly off from `max(a.x, b.x)`. Similar for the y-coordinates and the bottom edge.

## Implementation

    factory Rectangle.fromPoints(Point<T> a, Point<T> b) {
      T left = min(a.x, b.x);
      T width = max(a.x, b.x) - left;
      T top = min(a.y, b.y);
      T height = max(a.y, b.y) - top;
      return new Rectangle<T>(left, top, width, height);
    }