看一下幫助,裡面有 -+H?0XN
INTERFACE r [ t m m'] ? '"4S3Fysm
COAT k coat coat' ,b!]gsds
-k wS%j!|xhlV
+k S>N/K
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>2m%q
U
+ 指只有折射沒有反射光, #-^y9B
- 指只有反射沒有折射。