[OT] Poll: What does it mean for 1 rect to be 'within' a certain distance of another rect?

J. Landman Gay jacque at hyperactivesw.com
Mon Feb 15 18:13:53 EST 2021

I think the natural definition would be distance between the respective boundaries; i.e., edge 
to edge distance, but also the distance between corners. That is, if any of r1's corners is d 
distance from any one of r2's closest corners.

On 2/15/21 4:53 PM, Paul Dupuis via use-livecode wrote:
> This is an Off Topic informal poll of sorts, but related to LiveCode as I am writing a LiveCode 
> expression to determine if 2 arbitrary rectangles (r1,r2) are with some distance d (in px) of 
> one another. In considering this problem, the questions comes up: What is meant by rectangles 
> being within a distance d of one another. What is the 'd' measured from?
> center to center? Easiest is many ways, but I don't think this is what most people would think of.
> adjacent edge to adjacent edge? This is harder (I think), but I think this is what more people 
> intuitively think of. To me, implicit in the visual concept of 2 rects being within some 
> distance of one another is that they are NOT overlapping, but that some gap exists between the 
> nearest adjacent edges?
> Something else? What does 2 rects  being 'within' d pixels of one another mean to you, if not 
> one of the two above options?
> Maybe there is a exact mathematical definition of what 2 rectangles being within distance d of 
> one another is, but, if there is, I am unfamiliar with it.
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Jacqueline Landman Gay         |     jacque at hyperactivesw.com
HyperActive Software           |     http://www.hyperactivesw.com

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