interior radius vector sweeping 内点极径扫描法
radius vector [数] 矢径 ; 向量径
radius vector load 水平荷载
radius of vector 向量径
This graphics object can be used to do vector drawing on the Sprite. For example, see the code to draw a circle of radius 5.
这个图片对象可被用来在sprite上进行矢量作图。
So, for a sphere, the normal vector is divided by the radius of the sphere.
关于球体，法向量是,除以球的半径。
We have a sphere of radius a. I have my vector field.
先作出半径为a的球面，再画出给定的向量场。
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