Rodent
Rodent is a BVH traversal library implemented using the AnyDSL compiler framework (https://anydsl.github.io/).
Building
The dependencies are: CMake, AnyDSL, libpng, SDL2, and optionally the Embree sources for the benchmarking tools. Once the dependencies are installed, use the following commands to build the project:
mkdir build
cd build
cmake ..
# Optional: Create benchmarking tools for Embree and BVH extractor tools
# cmake .. -DEMBREE_ROOT_DIR = <path to Embree sources>
make
The current settings assume a machine with AVX2 or higher. To change this, edit the source code of the benchmarking tool to only use AVX or SSE, and set the CLANG_FLAGS CMake variable to the desired ISA.
Testing
Test files are provided in the testing directory. Use the following commands to test the code:
cd build/bin
./bench_traversal -bvh ../../testing/sponza.bvh -ray ../../testing/sponza-primary.rays -bench 50 -warmup 10 -tmax 5000 -o output-packet-primary.fbuf
./bench_traversal -bvh ../../testing/sponza.bvh -ray ../../testing/sponza-primary.rays -bench 50 -warmup 10 -tmax 5000 -s -o output-single-primary.fbuf
./bench_traversal -bvh ../../testing/sponza.bvh -ray ../../testing/sponza-random.rays -bench 50 -warmup 10 -tmax 1 -o output-packet-random.fbuf
./bench_traversal -bvh ../../testing/sponza.bvh -ray ../../testing/sponza-random.rays -bench 50 -warmup 10 -tmax 1 -s -o output-single-random.fbuf
./fbuf2png -n output-packet-primary.fbuf output-packet-primary.png
./fbuf2png -n output-single-primary.fbuf output-single-primary.png
./fbuf2png -n output-packet-random.fbuf output-packet-random.png
./fbuf2png -n output-single-random.fbuf output-single-random.png
This will run the traversal on the test set, and generate images as a result. Given the same ray distribution, the packet and single variants should generate the same images. The reference images for primary and random rays are in the testing directory.