A light that shines everywhere within a cone defined by Spot Angle and Range.
光线在按照聚光灯的角度和范围所定义的一个圆锥区域照射所有物体。
If there is a cone of light coming into my eye, what do I see?
如果有锥形的光进入我的眼睛，我看到了什么？
The paper derived a light equation for cone-lens.
本文推导了一个锥透镜的光线方程。
The paper derived a light equation for cone-lens.
本文推导了一个锥透镜的光线方程。
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