noahpitts / godRay

for making a god Ray

godRay

Demonstration of volumetric atmospheric scattering running on a GPU via NVidia's Optix SDK.

Final Project Report: https://noahpitts.github.io/godRay/

Authors

Noah Pitts and Isak Karlsson

Command Line Args

-h  || --help
-f  || --file
-n  || --nopbo
-nf || --num_frames
-md || --max_depth
-wh || --width_height
-as || --atmos_in_scatter
-ae || --atmos_extinction
-ah || --atmos_helios
-ad || --atmos_dist
-ag || --atmos_g
-ce || --cam_exposure
-cp || --cam_position
-ct || --cam_target
-sr || --sun_radius
-st || --sun_theta
-sp || --sun_phi

Main Program Overview

Launches an OpenGL window and a cuda context. Parses a mesh file, path hardcoded to "model/obj/temple_highres_video.obj" Sets up geometry, intersection, bounding box, and materials for each respective mesh. Executes OptiX for raytracing given the above configuration / context.

INSTALLATION / SETUP

• Download and install Optix SDK 4.0.2

  • https://developer.nvidia.com/optix

• Clone the advanced sdk samples from git

  • https://github.com/nvpro-samples/optix_advanced_samples

• Clone this repo into the following folder:

  • <PATH_TO>/optix_advanced_samples/src/godRay

• Edit the following file to include godRay as a sample project.

  • /optix_advanced_samples/src/CMakeLists.txt
  • Above add_subdirectory(optixHello) add the following:
    • add_subdirectory(godRay)

• Install CMake

• Install Visual Studios 2015

• run cmake-gui

  • set src/build
  • run configure
  • run generate
  • open project

• Compile, run, and enjoy!