计算机是能实现基本运算的一种功能设备。其中包括大量的算术运算或逻辑运算，在运行期间无需操作员去干预。
Computer is a functional unit that can perform substantial computation, including numerous arithmetic operations or logic operations, without intervention by human operator during a run.
在运行时，光能传输计算必须的光线与场景的求交运算被简化为在交点场中的查询操作。
At runtime, the i-field can be queried to accelerate the line-scene intersection computation that required in light energy propagation.
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