看一下幫助,裡面有 D|-]<r1"
INTERFACE r [ t m m'] ? WyN
;lId
COAT k coat coat' F B]Y~;(
-k $%bSRvA
+k Rs %`6et}\
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. YvR bM
+ 指只有折射沒有反射光, ARH~dN* C
- 指只有反射沒有折射。