Ray 射线

struct in UnityEngine

Representation of rays.

射线的结构描述。

A ray is an infinite line starting at origin and going in some direction.

Ray是具有开始点和方向的无穷线。

direction	The direction of the ray. 射线的方向。
origin	The origin point of the ray. 射线的原点。

Ray	Creates a ray starting at origin along direction. 创建一条射线从origin开始，沿direction方向。

GetPoint	Returns a point at distance units along the ray. 返回射线上指定距离的点。
ToString	Returns a nicely formatted string for this ray. 返回该射线格式化好的字符串。