看一下幫助,裡面有 1RHH<c%2n
INTERFACE r [ t m m'] ?
|sM#g1D@
COAT k coat coat' D ,^
U%<`
-k pvxqeC9`
+k urjp&L&
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. *.Hnt\4|
+ 指只有折射沒有反射光, 7B"aFnK;[J
- 指只有反射沒有折射。