[Newbies] Re: PolygonMorph intersection

[olivier mai]

>>r := Rectangle new.
>>r setOrigin: 150 at 0 corner: 175 at 25.
>>p intersects: r
>>returns a message not understood. 
>>
>>Am I doing something fundamentally wrong ?
Yes you are.
a rectangle is a polygon indeed. However, a PolygonMorph is a BorderedMorph, NOT  a RectangleMorph.

If you look for implementers of #intersects: , you will get only RectangleMorph.

PolygonMorph DOES NOT IMPLEMENT #intersects. So the system does indeed NOT UNDERSTAND the message.