看一下幫助,裡面有 Gk']Ma2J}
INTERFACE r [ t m m'] ? yz<$?Gblz
COAT k coat coat' e>2KW5.
-k C=Tq/L w
+k ";U#aK1p
The signs in front of k can be used to instruct ASAP to either propagate only a reflected ray (-k: t=0) at that object or to propagate only a transmitted ray (+k: r=0) at that object. 5Q/jI$^h0Z
+ 指只有折射沒有反射光, Ya
`$.D
- 指只有反射沒有折射。