看一下幫助,裡面有 6x]x>:8
INTERFACE r [ t m m'] ? _0GM!Cny
COAT k coat coat' (Ci{fY6`
-k Gl!fT1zh0
+k ,V`zW<8
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. QXaE2}}P
+ 指只有折射沒有反射光, [\_#n5
- 指只有反射沒有折射。