看一下幫助,裡面有 ^,3 >}PU
INTERFACE r [ t m m'] ? < mxUgU
COAT k coat coat' Aq-v3$XL
-k *+G K?Ga
+k /Wa+mp
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. `JC!uc
+ 指只有折射沒有反射光, |laqy`D
- 指只有反射沒有折射。