看一下幫助,裡面有 hBcklI
INTERFACE r [ t m m'] ? ){u#
(sW
COAT k coat coat' )@y'$)5s
-k -`Zk`s|!
+k k%-UW%
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. 3BLHd<
+ 指只有折射沒有反射光, rTJU)4I^h
- 指只有反射沒有折射。