More practical ray tracing methods currently include the wavefront method, the shortest path method, the travel time epenthesis method, the eikonalequation finite difference method, etc.
当前实用性较强的射线追踪方法，包括波前法，最短路径法，走时插值法，程函方程有限差分法等。
2
A new technique is given here, which combines partial algorithm with scanning algorithm and obtains wave arrival times by solving eikonalequation with the use of finite difference method.