Submitted in partial fulfillment of the requirements for the

Master of Music in Music Technology

Department of Music and Performing Arts Professions

Steinhardt School of Culture, Education, and Human Development

New York University

This repository initially came from Ingo Wald's 2019 Siggraph course materials. All of the setup and CMake scripts came from him.

This repo utilizes OptiX 7 for acoustic raytracing and serves as the project for my thesis. The raytracing implementation was inspired by pyroomacoustics. At the time of writing and programming, there is a beta branch called "next-gen-simulator" which contains a Cython raytracing implementation. This implementation was benchmarked against that implementation and passes with up to 5e-7 precision. Specifically, the raytracing histograms were benchmarked. This is my fork of pyroomacoustics for the benchmarking measurements.

Building it is almost exactly the same as the optix7course. I added the cuda helper files from the CUDA Samples into common/cuda_helpers.

This code was intentionally written with minimal dependencies, requiring only CMake (as a build system), your favorite compiler (tested with Visual Studio 2017 and 2019 under Windows, and GCC under Linux), and the OptiX 7 SDK (including CUDA 10.1 and NVIDIA driver recent enough to support OptiX).

Here is a pdf of a UML diagram for the sound objects. Here is another UML of the Optix-specific classes. Lastly, here is a high level diagram of the program flow

• a compiler
  • On Windows, tested with Visual Studio 2017 and 2019 community editions
  • On Linux, tested with Ubuntu 18 and Ubuntu 19 default gcc installs
• CUDA 10.1
  • Download from developer.nvidia.com
  • on Linux, suggest to put /usr/local/cuda/bin into your PATH
• latest NVIDIA developer driver that comes with the SDK
  • download from http://developer.nvidia.com/optix and click "Get OptiX"
• OptiX 7 SDK
  • download from http://developer.nvidia.com/optix and click "Get OptiX"
  • on linux, suggest to set the environment variable OptiX_INSTALL_DIR to wherever you installed the SDK.
    export OptiX_INSTALL_DIR=<wherever you installed OptiX 7.0 SDK>
  • on windows, the installer should automatically put it into the right directory

Detailed steps below:

• Install required packages

  • on Debian/Ubuntu: sudo apt install cmake-curses-gui
  • on RedHat/CentOS/Fedora (tested CentOS 7.7): sudo yum install cmake3

• Clone the code

    git clone git@github.com:Cindytb/Acoustic_Raytracing.git
    cd Acoustic_Raytracing

• create (and enter) a build directory

    mkdir build
    cd build

• configure with cmake

  • Ubuntu: cmake ..
  • CentOS 7: cmake3 ..

• and build

    make

• Install Required Packages
  • see above: CUDA 10.1, OptiX 7 SDK, latest driver, and cmake
• download or clone the source repository
• Open CMake GUI from your start menu
  • point "source directory" to the downloaded source directory
  • point "build directory" to /build (agree to create this directory when prompted)
  • click 'configure', then specify the generator as Visual Studio 2017 or 2019, and the Optional platform as x64. If CUDA, SDK, and compiler are all properly installed this should enable the 'generate' button. If not, make sure all dependencies are properly installed, "clear cache", and re-configure.
  • click 'generate' (this creates a Visual Studio project and solutions)
  • click 'open project' (this should open the project in Visual Studio)

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