HART: A hybrid architecture for ray tracing animated scenes

Jae Ho Nah, Jin Woo Kim, Junho Park, Won Jong Lee, Jeong Soo Park, Seok Yoon Jung, Woo Chan Park, Dinesh Manocha, Tack Don Han

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


We present a hybrid architecture, inspired by asynchronous BVH construction [1] , for ray tracing animated scenes. Our hybrid architecture utilizes heterogeneous hardware resources: dedicated ray-tracing hardware for BVH updates and ray traversal and a CPU for BVH reconstruction. We also present a traversal scheme using a primitive's axis-aligned bounding box (PrimAABB). This scheme reduces ray-primitive intersection tests by reusing existing BVH traversal units and the primAABB data for tree updates; it enables the use of shallow trees to reduce tree build times, tree sizes, and bus bandwidth requirements. Furthermore, we present a cache scheme that exploits consecutive memory access by reusing data in an L1 cache block. We perform cycle-accurate simulations to verify our architecture, and the simulation results indicate that the proposed architecture can achieve real-time Whitted ray tracing animated scenes at 1,920×1,200 resolution. This result comes from our high-performance hardware architecture and minimized resource requirements for tree updates.

Original languageEnglish
Article number6960897
Pages (from-to)389-401
Number of pages13
JournalIEEE Transactions on Visualization and Computer Graphics
Issue number3
Publication statusPublished - 2015 Mar 1

Bibliographical note

Publisher Copyright:
© 1995-2012 IEEE.

All Science Journal Classification (ASJC) codes

  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Computer Graphics and Computer-Aided Design


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