There are 2 repositories under bidirectional-path-tracing topic.
LuxCore source repository
Physically-based CPU and GPU ray-tracer
Hex-grid utilities for board and strategy games with path-finding, field-of-view, and more
DFS / BFS / IDS / UCS / Bi-directional / A* / IDA* / SMA* / ...
Bidirectional and unidirectional GPU accelerated path tracing with Radeon Rays and OpenCL 1.2.
A minimal bidirectional pathtracer with as few features as possible, but physically accurate
missionaries and cannibals problem and solution implemented using DFS,BFS and bidirectional BFS.
Bidirectional path tracing with native C++ and OpenGL
Implementation of bidirectional similarity method on image retargeting.
A bi-directional JavaScript AVL tree based on progressive (non-return) algorithm of BST