Quote:

Correct me if I'm wrong, but a pointer == 0 is true and pointer != 0 is false in C, so this is valid syntax.



Yes, but this part:

Code:

(..&& entity1 && entity2...)


is not correct. It will work in most version of ANSI C and C++, but most programmers will recommended against it.

You should do something like:

Code:

(..&& (entity1 != NULL) && (entity2 != NULL) ..)


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