FeaturePair.value not set correctly? about box2d-lite HOT 2 CLOSED

Oh, I see. Thank you!

from box2d-lite.

I have been doing some work on Box2D-Lite and your ticket caught my attention.

It also looked to me that fp.value is only ever set to 0 but thats not the case.
If you look at the definition of FeaturePair we can see that its actually a union type so setting inEdge1, etc will also affect value. This seems like just a way to speed up comparisons between all of these char members using type punning.

union FeaturePair
{
  struct Edges
  {
    char inEdge1;
    char outEdge1;
    char inEdge2;
    char outEdge2;
  } e;
  int value;
};

from box2d-lite.