看一下幫助,裡面有 } 8&?
INTERFACE r [ t m m'] ? aPRXK1
COAT k coat coat' XT` 2Z=
-k h#JX$9
+k zz**HwRt
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. &w'1
+ 指只有折射沒有反射光, e~P4>3
- 指只有反射沒有折射。