最近要建立一個LED光源 於是上了Lumileds 抓取一份光源資料 DJlY~}v#_  
6C>x,kU  
但是在 LT 的 Ray date 建立時 它要我決定 <1>  indicate position for source center ni gp83:  
                                                   :Vq gmn  
                                                                              <2>  indicate Z axis direction for source fRJSo%  
}' `2C$  
                                                                              <3>  indicate Y axis direction for source [Dp