Thread: Macro translation

I am trying to analyze some code and I ran into this giant macro. Can someone please translate this into an equivalent C function?

Code:

#define BOX_ON_PLANE_SIDE(emins, emaxs, p)						\
	(((p)->type < 3)?								\
	(										\
		((p)->dist <= (emins)[(p)->type])?					\
			1								\
		:									\
		(									\
			((p)->dist >= (emaxs)[(p)->type])?				\
				2							\
			:								\
				3							\
		)									\
	)										\
	:										\
		BoxOnPlaneSide( (emins), (emaxs), (p)))

Notice that when p->type is greater than or equal to 3 it calls something else called BoxOnPlaneSide(). Otherwise it resolves to one of the precalculated answers, 1, 2, or 3. That's pretty much all it does. The ternary operator ?: is really just another way to write an if else as a statement, and I think it is being abused here.

Great, thats all I needed to know. Thanks for the help