code: public void setTrajectory(Trajectory traj) {
  		if (this.footprint == null) {
  			throw new NoFootprintException("No footprint set for " + this + ", please specify one before setting the trajecotry.");
  		}
  		else{
  			createOuterEnvelope(traj);
  		}
  		if(this.innerFootprint != null){
  			createInnerEnvelope(traj);
  		}
  		
  	}
docs: Set the {@link Trajectory} of this {@link TrajectoryEnvelope}.
  @param traj The {@link Trajectory} of this {@link TrajectoryEnvelope}.