看一下幫助,裡面有 _,"?R]MO
INTERFACE r [ t m m'] ? 3 L:s5
COAT k coat coat' I^u$H&
-k ~ z< &vQ=
+k %(P\"hE'
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. 71RG1,
+ 指只有折射沒有反射光, M0B6v}^H
- 指只有反射沒有折射。