看一下幫助,裡面有 JB<4m4-
INTERFACE r [ t m m'] ? .~J^`/o
COAT k coat coat' \.]
U
-k n}{cs
+k l1WVt}
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. {'!~j!1'j
+ 指只有折射沒有反射光, plfB}p
- 指只有反射沒有折射。