Thinking outside the hitbox

IMPLEMENT_CALLBACK( ProjectileData, onCollision, void, ( Projectile* proj, SceneObject* col, F32 fade, Point3F pos, Point3F normal, S32 hitBoxNum ),
                   ( proj, col, fade, pos, normal, hitBoxNum ),
				   "@brief Called when a projectile collides with another object.\n\n"
                   "This function is only called on server objects."
				   "@param proj The projectile colliding with SceneObject col.\n"
				   "@param col The SceneObject hit by the projectile.\n"
				   "@param fade The current fadeValue of the projectile, affects its visibility.\n"
				   "@param pos The position of the collision.\n"
                   "@param normal The normal of the collision.\n"
				   "@see Projectile\n"
				  );

bool ShapeBaseData::preload(bool server, String &errorStr)
{...
	  if (mUseHitboxes)
	  {
		  //find the HitBox mesh
		  //The hit box mesh is a convex mesh named HB$DDD where DDD is the detail level, the same used for the model and $ is a letter from a to z
		  bool HBfound=false;
		  for (i=0; i< Max_Hitboxes; i++)
		  {
			  char buff[8];
			  dSprintf(buff,sizeof(buff),"HB%d",i+1);
			  HBIndex[i] = mShape->findObject(buff);
			  if (HBIndex[i] != -1) HBfound = true;
		  }
		  if (!HBfound) Con::warnf("No hitboxes found!");
	  }
...}

void ShapeBaseData::initPersistFields()
{...
      addField( "UseHitboxes", TypeBool, Offset(mUseHitboxes, ShapeBaseData),
         "Do we use multiple collision boxes, or just stick to the bounds?" );
...}

if (!mDataBlock->mUseHitboxes) return true;
   //if we are here means that the ray has hit the bounding box, now check if an hit box was hit
   //if it hit a collision box the HitBoxNum
   //in the info struct is filled with the number of the box otherwise it remains -1
   if (mShapeInstance)
   {
	   RayInfo shortest;
	   shortest.t = 1e8;
	   if (isServerObject()) 
	   {
		   mShapeInstance->animate(0);	//Animate the model on the server
	   }
	   
	   for (U32 i = 0; i < ShapeBaseData::Max_Hitboxes; i++) 
	   {
		   if (mDataBlock->HBIndex[i] != -1) 
		   {
			   if (mShapeInstance->castRayEA(start, end, info,0,mDataBlock->HBIndex[i]))
			   {
				   info->object = this;
				   if (info->t < shortest.t) 
				   {
					   shortest = *info;
					   shortest.HitBoxNum = i+1;		//  +1 because the meshes HB## begin from 1
				   }
			   }
		   }
	   }
	   if (info->object == this) 
	   {
		   // Copy out the shortest time...
		   *info = shortest;
	   }
	   if (info->HitBoxNum == -1) return false;
	   info->point.interpolate(start,end,info->t);
   }
   return true;
}