看一下幫助,裡面有 G@<[fO|Iam
INTERFACE r [ t m m'] ? e C&!yY2g
COAT k coat coat' B;Co`o2
-k a
JQ_V
+k xDmwiVy
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. 'jKCAU5/0;
+ 指只有折射沒有反射光, 2V$YZSw6q
- 指只有反射沒有折射。