if (this->activity == GA_WANDER || this->activity == GA_QUEUING) { // Prevent wandering and queuing guests from walking out the park.
	uint8 exits_viable = this->Person::HandleParkExits(); 
	exits &= exits_viable;
	shops &= exits_viable;
}

/**
 * Prevent people from wandering out of the park.
 * @return exits Exits from the current tile that stay or lead into the park in
 * the low nibble.
 */
uint8 Person::HandleParkExits()
{
	uint8 exits = 0xF;
	for (TileEdge exit_edge = EDGE_BEGIN; exit_edge != EDGE_COUNT; exit_edge++) {
		Point16 dxy = _tile_dxy[exit_edge];

		if (this->x_vox + dxy.x < 0 || this->x_vox + dxy.x >=
		_world.GetXSize()) continue;
		if (this->y_vox + dxy.y < 0 || this->y_vox + dxy.y >=
		_world.GetYSize()) continue;
		if (_world.GetTileOwner(this->x_vox + dxy.x, this->y_vox + dxy.y) != OWN_PARK) {
			SB(exits, exit_edge, 1, 0);
		}
	}

	return exits;
}