Add default constructor for SC_SACD_Generic_Box

src/sc_sacd.cpp

@@ -191,6 +191,12 @@ std::vector<SC_SACD_MinMax> SC_SACD_Get_Box_MinMax(
 // Private Helpers END
 // =============================================================================
 
+SC_SACD_Generic_Box SC_SACD_Generic_Box_Default() {
+  return {
+      0.0F, 0.0F, 0.0F, 2.0F, 2.0F, 2.0F, SC_SACD_Mat4_Identity(),
+  };
+}
+
 int SC_SACD_AABB_Box_Collision(const SC_SACD_AABB_Box *a,
                                const SC_SACD_AABB_Box *b) {
   float ax_min = a->x - a->width / 2.0F;

src/sc_sacd.h

@@ -44,6 +44,7 @@ typedef struct SC_SACD_EXPORT SC_SACD_AABB_Box {
   float depth;
 } SC_SACD_AABB_Box;
 
+/// Must not be zero initialized. Use SC_SACD_Generix_Box_Default() instead.
 typedef struct SC_SACD_EXPORT SC_SACD_Generic_Box {
   /// Coordinates are to center of box.
   float x;
@@ -66,6 +67,9 @@ typedef struct SC_SACD_EXPORT SC_SACD_Sphere {
   float radius;
 } SC_SACD_Sphere;
 
+/// Returns a box at origin with width/height/depth of 2 each.
+SC_SACD_EXPORT SC_SACD_Generic_Box SC_SACD_Generic_Box_Default(void);
+
 /// Returns non-zero if there is collision.
 SC_SACD_EXPORT int SC_SACD_AABB_Box_Collision(const SC_SACD_AABB_Box *a,
                                               const SC_SACD_AABB_Box *b);