看一下幫助,裡面有 aJ-}
INTERFACE r [ t m m'] ? _7 `E[&v
COAT k coat coat' FE6C6dW{
-k I@PJl
+k qc-C>Ra
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. Y\8+}g;KR
+ 指只有折射沒有反射光,
^@q#$/z
- 指只有反射沒有折射。