QuickTree: A Fast Hardware BVH Construction Engine.

Ray tracing has emerged as a powerful technique for generating visually stunning and realistic images compared to rasterization. With the continuous advancements in computer hardware, modern GPUs have integrated specialized ray tracing acceleration units to enhance rendering capabilities further. However, achieving realtime ray tracing presents a challenge in dynamic scenes, where spatial data structures used for accelerated rendering must be reconstructed or updated when there are changes in the scene primitives. This paper introduces QuickTree, a novel Bounding Volume Hierarchy (BVH) construction engine based on the linear BVH (LBVH) optimization algorithm. QuickTree addresses the challenge of dynamic scenes support by employing a highly parallel and pipelined system design. This innovative approach ensures fast construction speed. QuickTree demonstrates significant performance improvements. Compared to the currently fastest MergeTree, it has increased construction speed by 10% and reduced area by 45% compared to RayCore, which has the smallest chip area.