Begin refactor.

src/physics/aabb.h

@@ -10,6 +10,24 @@
 #include "sphere.h"
 #include "../input/input.h"
 
+typedef struct {
+  float hitX;
+  float hitY;
+
+  float normalX;
+  float normalY;
+} aabbpointhit2d_t;
+
+typedef struct {
+  float time;
+  
+  float normalX;
+  float normalY;
+
+  float hitX;
+  float hitY;
+} aabbvectorhit2d_t;
+
 /**
  * Perform a test against a point and an AABB.
  *