This repository contains the source code for the rendering system, PBRT-v4 extended. It extends the original rendering system, PBRT-v4 to include:
- Bilateral filtering
- Procedural Content Generation (PCG)
The PBRT-v4 source code is available at git respository.
The source code for bilaterial filtering can be found in film.cpp in the RGBFilm::ApplyBilateralFilter() function.
The source code for PCG can be found in pbrt-v4/src/pbrt/pcgUtil. The new classes we implemented are:
- procedural
- pcg_sampling
- pbrt_exporter
- sampleTo3D
pbrt-v4/src/pbrt/util/transformer.h was updated for PCG.
pbrt-v4/src/pbrt/cmd/scene.cpp is modified with our implementation of parameterized input for pcg in the ProceduralMesh() function.
PBRT uses cmake, to compile the code run the following commands.
$ mkdir build
$ cd build
$ cmake ..
$ make -j
To render our 3D scene, run the following command.
$ ./pbrt ../epic_model/scene-v4.pbrt
Inside the build folder, a scene.png file should be generated.
To test rendering the scene with/without bilateral filtering, you need update pbrt-v4/final_models/epic_model/final-scene.pbrt file. Set the bilateral parameter to true or false.
You can also edit the bilateral_sigma_spatial and bilateral_sigma_range parameters.
Here is an example.
Film "rgb"
"string filename" [ "scene.png" ]
"integer yresolution" [ 396 ]
"integer xresolution" [ 960 ]
"bool bilateral" [ false ]
"float bilateral_sigma_spatial" [ 1 ]
"float bilateral_sigma_range" [ 0.2 ]
To test PCG, you need to define ProceduralMesh in final-scene.pbrt. This will write to instances.pbrt file.
An example is given below:
ProceduralMesh "../final_models/epic_model/models/vegetation/leaf.ply"
"string filename" [ "../final_models/epic_model/models/floor.ply" ]
"string densitymap" [ "../final_models/epic_model/models/vegetation/DM1.png" ]
"integer nSamples" [ 100 ]
"string meshFilename" [ "../final_models/epic_model/models/vegetation/leaf.ply" ]
"string namedMaterial" [ "vegetation" ]
"string materialType" [ "diffuse" ]
"string texture" [ "../final_models/epic_model/models/textures/fauna/Bush_2.png" ]
"string bumpMap" [ "" ]
"string normalMap" [ "" ]
"string opacityMap" [ "../final_models/epic_model/models/textures/fauna/Bush_2_Opacity.png" ]
"string outputFilePath" [ "../final_models/epic_model/models/vegetation/instances.pbrt" ]
Then, include the instances.pbrt file in final-scene.pbrt by:
Import file_path/instances.pbrt