EM_tracing

About the name

'EM' means 'Electromagnetic Waves'. However not many EM related functions at this point.

Introduction

EM_tracing is a software based on Nvidia Optix Ray Tracing Engine. A big part of the code came from ingowald/optix7course.

Building the code

This code requires CMake (version 3.18 or higher) to build. MSVC 2019 and Clang 10.0.0 C++ compiler under Windows 10 has been tested to build successfully. (Theoretically other combinations of compilers and OS like GCC under Linux should also work)

Dependencies

• A Nvidia GPU
• a compiler
  • on Windows 10, tested with MSVC 2019 and Clang 10.0.0 C++ compiler
  • other common compilers (not tested)
• CMake (version 3.18 or higher)
• CUDA 10.x or CUDA 11
• Latest Nvidia GPU Driver
• OptiX 7.1 SDK
• a 3D geometry object file
  • recommend Crytek Sponza, BMW on https://casual-effects.com/data/

Important settings and parameters

• In /CMakeLists.txt, CUDA_ARCHITECTURES. Change it to match your GPU.
  • see details in CMake Document, CUDA Document

set_target_properties(CudaPTX PROPERTIES
...
CUDA_ARCHITECTURES 75-real # Set your GPU architecture (important)
...
)

• Also in /CMakeLists.txt, _OBJ_FILE. Change it to match your .obj file path

#Set your OBJ file path
target_compile_definitions(EM_tracing PUBLIC _OBJ_FILE="${PROJECT_SOURCE_DIR}/models/sponza.obj")

Controlling

• Use left, middle, right mouse button to drag and scroll
• Press w, s, a, d to move
• Press =, - to control drag speed, alt + =, - to control move speed
• Press p, l to switch between pin-hole camera and 360 degree camera (not working properly at the moment)
• Press r, t to switch between normal rendering mode and phase detection mode
• Press c to check current camera information