The discrete triangle grid may describe the complex geologic structure, but its ray tracing efficiency is quite low due to its including of many triangles.
离散的三角网格可以描述复杂的地质构造，但是由于包含大量三角形，使得射线追踪效率比较低。
Ray tracing accelerate technique, the parameters of complex ray has been discussed in this article, and some empirical formulas for choosing the complex ray parameters have been given out.
本文讨论了射线追踪加速技术，复射线参数的选取，并分析了复射线计算中产生误差的主要原因。
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