I am debugging a problem with my touchcode and I stumbled upon this weird behaviour of the Rect class.
Rect rect = new Rect(0,0,10,10);
rect.contains(0,0) // true
rect.contains(10,10) // false
rect.contains(9,9) // true
Why is this happening??!
Why are the right and bottom bounds exclusive and the left and top inclusive? I don't find it logical, and there is no documentation that notes this.
This is expected/documented. From the contains(int, int) reference:
The left and top are considered to be inside, while the right and bottom are not. This means that for a x,y to be contained: left <= x < right and top <= y < bottom.
Although I agree this seems a little illogical, it makes more sense when you consider an edge case:
An empty rectangle never contains any point.
This behavior also prevents a single x,y point from being contained within multiple, non-intersecting Rects.