June 28, 2007: Trash shadow

[Happy Monkey]

Originally Posted by Happy Monkey

The profiles "intersect" insomuch as any two different 2D projections of a 3D object "intersect".

I'm not sure what it is you think the word "profile" on the diagram means, but that word seems to be what is preventing you from understanding the diagrams, which is why I tried a few other words.

What I understand it to mean is "the 2D pattern that the object appears as when viewed from the designated angle". As such, any two of them, as long as they aren't colinear, will "intersect", though I'm not sure the word is completely relevant.