   ray plane intersection with HLSL
  hi,there are some one post the theroy about how to calculate ray plane intersection .http://www.gamedev.net/community/forums/topic.asp?topic_id=321357I am trying found the hlsl code in the nvidia SDK shader library, but can not found . can some one told me where I can found the code .or there are already some HLSL function has implement this?Thanks.   