| 摘要 |
PURPOSE: A method for tracking a ray path is provided to perform efficient analysis by eliminating a need of repetitively generating a node. CONSTITUTION: A fixed threshold distance is defined based on a reference object in IVS(Interobject Visibility Set)(IVS_A,IVS_B,IVS_C,IVS_E,IVS_F). It is determined whether another object in the IVS exists within the threshold distance. If another object does not exist within the threshold distance, another object is deleted from the IVS. |
