看一下幫助,裡面有 n2_;:=
INTERFACE r [ t m m'] ? # bjK]+
COAT k coat coat' |aU8WRq
-k )n<p_vz
+k y5KeUMcu
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. }tBw<7fe
+ 指只有折射沒有反射光, MGK?FJn_?
- 指只有反射沒有折射。