Strelka

Path tracing render based on NVIDIA OptiX + NVIDIA MDL and Apple Metal

OpenUSD Hydra render delegate

Basis curves support

Project Dependencies

OpenUSD https://github.com/PixarAnimationStudios/OpenUSD

• Set evn var: USD_DIR=c:\work\USD_build

OptiX

• Set evn var: OPTIX_DIR=C:\work\OptiX SDK 8.0.0

Download MDL sdk (for example: mdl-sdk-367100.2992): https://developer.nvidia.com/nvidia-mdl-sdk-get-started

• unzip content to /external/mdl-sdk/

LLVM 12.0.1 (https://github.com/llvm/llvm-project/releases/tag/llvmorg-12.0.1) for MDL ptx code generator

• for win: https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.1/LLVM-12.0.1-win64.exe
• for linux: https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.1/clang+llvm-12.0.1-x86_64-linux-gnu-ubuntu-16.04.tar.xz
• install it to c:\work for example
• add to PATH: c:\work\LLVM\bin
• extract 2 header files files from external/clang12_patched to C:\work\LLVM\lib\clang\12.0.1\include

Strelka uses conan https://conan.io/

• install conan: pip install conan
• install ninja [https://ninja-build.org/] build system: sudo apt install ninja-build

detect conan profile: conan profile detect --force

1. conan install . --build=missing --settings=build_type=Debug
2. cd build
3. cmake .. -G "Visual Studio 17 2022" -DCMAKE_TOOLCHAIN_FILE=generators\conan_toolchain.cmake
4. cmake --build . --config Debug

On Mac/Linux:

1. conan install . -c tools.cmake.cmaketoolchain:generator=Ninja -c tools.system.package_manager:mode=install -c tools.system.package_manager:sudo=True --build=missing --settings=build_type=Debug
2. cd build/Debug
3. source ./generators/conanbuild.sh
4. cmake ../.. -DCMAKE_TOOLCHAIN_FILE=generators/conan_toolchain.cmake -DCMAKE_BUILD_TYPE=Debug
5. cmake --build .

Installation

Launch

Synopsis

Strelka -s <USD Scene path> [OPTION...] positional parameters

-s, --scene arg       scene path (default: "")
-i, --iteration arg  Iteration to capture (default: -1)
-h, --help            Print usage

To set log level use

`export SPDLOG_LEVEL=debug`

The available log levels are: trace, debug, info, warn, and err.

Example

./Strelka -s misc/coffeemaker.usdc -i 100

USD

USD env:
    export USD_DIR=/Users/<user>/work/usd_build/
    export PATH=/Users/<user>/work/usd_build/bin:$PATH
    export PYTHONPATH=/Users/<user>/work/usd_build/lib/python:$PYTHONPATH

Install plugin:
    cmake --install . --component HdStrelka

License

• USD plugin design and material translation code based on Pablo Gatling code: https://github.com/pablode/gatling