看一下幫助,裡面有 +:uz=~mo`
INTERFACE r [ t m m'] ? g&c ~grD
COAT k coat coat' w^ut,`yWR
-k Jr( =Y@Z'
+k \$ipnQv
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. o^vX\a?`u
+ 指只有折射沒有反射光, gr*CN<
- 指只有反射沒有折射。