## [squeak-dev] What it is the expected behavior of Rectangle (class) #intersect: if there is no interesection?

karl ramberg karlramberg at gmail.com
Tue Nov 29 06:01:26 UTC 2022

```Doh, ignore my answer.
Its to early in the morning :-D

Best,
Karl

On Tue, Nov 29, 2022 at 6:50 AM karl ramberg <karlramberg at gmail.com> wrote:

> Hi,
> I think you must use this method with a very similar name
>
> intersects: aRectangle
> (origin max: aRectangle origin) < (corner min: aRectangle corner)"
>
> Best,
> Karl
>
> On Tue, Nov 29, 2022 at 1:50 AM LawsonEnglish <LEnglish5 at cox.net> wrote:
>
>> I did this and created 2 small rectangles quite far from each other
>> trying to figure out what the method returns when there is no intersection:
>>
>> r1 := Rectangle fromUser.
>> r2 := Rectangle fromUser.
>>
>> r2 3072 at 993 corner: 3203 at 1136
>> r1 2710 at 632 corner: 2835 at 752
>>
>> r2 intersect: r1 3072 at 993 corner: 2835 at 752
>>
>> r1 intersect: r2  3072 at 993 corner: 2835 at 752
>>
>> Could someone explain these results?
>>
>> Not in terms of the math involved (I assume that there’s no math bug as
>> the routine was last edited 22 years ago and it is used everywhere in
>> Morphic), but what the LOGIC is for returning what is returned and what it
>> means in the context of the comments:
>>
>> intersect: aRectangle
>>         "Answer a Rectangle that is the area in which the receiver
>> overlaps with
>>         aRectangle…. “
>>
>> I was trying to figure out how to look to identify when there is no
>> intersection, and that isn’t at all obvious here.
>>
>> Thanks.
>>
>>
>> L
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20221129/54d86885/attachment.html>
```