Example code for tracing photons in time-varying heterogenous media using a visual importance map as described in the publication "Correlated Photon Mapping for Interactive Global Illumination of Time-Varying Volumetric Data". Note that each folder may have different licenses.

Please cite the article when making use of this code:

@article{JFY16,
author = {J{"o}nsson, Daniel and Ynnerman, Anders},
title = {{Correlated Photon Mapping for Interactive Global Illumination of Time-Varying Volumetric Data}},
journal = {IEEE Transactions on Visualization and Computer Graphics (TVCG)},
number = {1},
volume = {23},
pages = {901 - 910},
year = {2017}
}

1. Download and setup Inviwo (tested with version Inviwo commit 989dc16e00aff2e3955281dbcf5a224ec53d2001):

• Download link: https://github.com/inviwo/inviwo/tree/989dc16e00aff2e3955281dbcf5a224ec53d2001
• Setup instructions: https://github.com/inviwo/inviwo/wiki
• OpenCL Required (For Nvidia: https://developer.nvidia.com/cuda-toolkit)

2. Download and setup boost (required by the radix sorting library)

• http://www.boost.org/

3. Set the directory to this folder in CMake, IVW_EXTERNAL_MODULES path/to/CorrelatedPhotonMapping/modules;

• Press Configure in CMake

4. Enable the IVW_MODULE_PROGRESSIVE_PHOTONMAPPING

• Press Configure/Generate in CMake until no errors appear.
• Compile and run!
• Load workspace workspaces/CorrelatedPhotonMappingSingleVolume.inv for and example.
• Be patient: Optimal OpenCL workgroup sizes are found for sorting the first time loading the workspace.

• The project and module configuration/generation is performed through CMake.
• Inviwo interactive visualization workshop is required.
• OpenCL Required (For Nvidia: https://developer.nvidia.com/cuda-toolkit)
• Boost Required

Each folder can be under a different license. See license.txt in each folder.

radixsortcl: clogs 1.5.0 is under MIT license

rndgenmwc64x: MWC64X is under BSD license

uniformgridcl: is under MIT license

importancesamplingcl is under Creative Commons Attribution-NonCommercial 4.0 International license

lightcl is under Creative Commons Attribution-NonCommercial 4.0 International license

progressivephotonmapping is under Creative Commons Attribution-NonCommercial 4.0 International license