7. Implementation and Analysis of Parallel kd-Tree Based on Binary Radix Tree with OptiX Realtime Raytracing Framework for Collision Detecti

Title(KR)

• 게임 충돌 처리 및 실시간 레이트레이싱을 위한 OptiX 실시간 광선추적 프레임워크 상의 Binary Radix Tree 기반 병렬 kd Tree 구현 및 분석

Title(ENG)

• Implementation and Analysis of Parallel kd-Tree Based on Binary Radix Tree with OptiX Realtime Raytracing Framework for Collision Detection and Realtime Raytracing

Keywords(KR)

• kd-tree, nearest neighbor search, OptiX, CUDA, raytracing, binary radix tree, GPU

Keywords(ENG)

• kd-tree, nearest neighbor search, OptiX, CUDA, raytracing, binary radix tree, GPU

Author

• Taejung Park

Abstract(ENG)

This paper presents a parallel kd-tree traversal algorithm based on the parallel binary radix tree construction scheme proposed by Tero Karras in 2012. In his paper, Tero Karras proposed parallel tree construction algorithm which can maximize the utilization of GPU threads, but implementation and analysis of kd-tree are not fully discussed. This paper aims to fill the gap for the specific kd-tree cases. As an application for the kd-tree traversal method proposed in this paper, the proposed method has been implemented with NVIDIA’s CUDA framework and tested on NVIDIA’s realtime raytracing library, OptiX. As a result, the proposed method can construct tree structures within the requirement for realtime process, but still needs specialized spatial caching data structure like the “primitive tree” for highly detailed meshes to handle spatial queries as fast as to visualize implicit surfaces under OptiX framework. However, the proposed method can be applied to dynamic collision detection and manage scene and object information for game applications thanks to its fast tree construction process. Also, realtime raytracing can be applied to game applications based on this study

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