看一下幫助,裡面有 XC/]u%n8](
INTERFACE r [ t m m'] ? X@h^T>["
COAT k coat coat' ++Ys9Y)*,
-k rPo\Dz
+k x(3
I?#kE
The signs in front of k can be used to instruct ASAP to either propagate only a reflected ray (-k: t=0) at that object or to propagate only a transmitted ray (+k: r=0) at that object. 1y)$[e
+ 指只有折射沒有反射光, '[=yfh
- 指只有反射沒有折射。