看一下幫助,裡面有 `^wF]R
INTERFACE r [ t m m'] ? scJ`oc:<J
COAT k coat coat' { tim{nV
-k c c
,]
+k AG/nX?u7)t
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. wb"Jj
+ 指只有折射沒有反射光, vyN=X]p
- 指只有反射沒有折射。