Why are the top and left coordinates swapped in Update

	if (objects.size() > 0)
	{
		for(size_t i = 0; i < objects.size(); i++){
			Ttlwh a;
			a.t=objects[i].rect.x;
			a.l=objects[i].rect.y;
			a.w=objects[i].rect.width;
			a.h=objects[i].rect.height;

			float score = objects[i].prob;
			int obj_id  = objects[i].label;

			STrack strack(a, score, obj_id, this);
			if (score >= track_thresh) detections.push_back(strack);
			else  			           detections_low.push_back(strack);
		}
	}

More specifically

a.t=objects[i].rect.x;
a.l=objects[i].rect.y;

Start in the Update code containing the shown object-to-Ttlwh assignments and inspect the definitions of Ttlwh and objects[i].rect. Compare the coordinate conventions for x, y, top, and left, then verify the resulting tracking boxes with the repository's object-tracking behavior. Done means the assignments use the intended coordinate order and any correction is validated without swapping width or height.