Radiometry

14 Ray Tracing 2 AccelerateAcceleration: Bounding Volumes Ray-Intersection With a Box Understanding : box is the intersection of 3 pairs of slabs. Axis-Aligned Bounding Box: AABB 轴对齐包围盒 光线进入所有包围面，进入盒子。出去其中一个包围面，出去包围盒。 $t_{enter}=max{t_{min}}, t_{exit}=min{t_{max}}$ If $t_{enter}<t_{exit}$, ray stay a while in the box. $t_{enter}<t_{exit} and t_{exit}>=0$, ray and AABB intersection. Grid Solution: 在bounding box 里面再弄一堆格子 Spatial Partitioning Examples Oct-Tree KD-Tree BSP- ...