看一下幫助,裡面有 n+Ia@$|m
INTERFACE r [ t m m'] ? "t4$%7L]
COAT k coat coat' <q
V<dK&W
-k : Gp,d*M
+k [
7W@/qqv
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. 5",@!1ju
+ 指只有折射沒有反射光, B 4pJg
- 指只有反射沒有折射。