Re: Distance from point to box - Mailing list pgsql-hackers

> double dx = 0.0, dy = 0.0;
>
> if (point->x < box->low.x)
>    dx = box->low.x - point->x;
> if (point->x > box->high.x)
>    dx = point->x - box->high.x;
> if (point->y < box->low.y)
>    dy = box->low.y - point->y;
> if (point->y > box->high.y)
>    dy = point->y - box->high.y;
> return HYPOT(dx, dy);
>
> I feel myself quite tangled.
> Could anybody clarify it for me? Did I miss something? Thanks.

ISTM that you miss the projection on the segment if dx=0 or dy=0.

-- 
Fabien.