Description #

This is a custom version of the early release of pbrt-v4 for the PrISE-3D project, the rendering system fourth edition of Physically Based Rendering: From Theory to Implementation.

How to use ? #

Build the project #

mkdir build
cd build
cmake ..
make -j

Custom version [Parameters] #

Current version is an extension of pbrt-v4 with use of some specific needs required during thesis:

Extended command line parameter:

• --folder: {string} – output folder of current rendered scene ;
• --nimages: {unsigned} – number of independent images of spp samples to generate ;
• --independent: {bool} – save or not in an independant way (default 1, hence true) ;
• --startindex: {unsigned} – start output index of first generated image for new run ;
• --estimator: {string} – Expected estimator as output [“mean”, “mon”, “pakmon”, “mean_or_mon”] using src/pbrt/estimators.h Estimator factory.

Note: current version enable the use MoN (Median of meaNs) estimator as output:

• nbuffers: set the number of buffers (M-estimators) to use. It is a constant value in order to work on GPU. Value can be update and available at the top of the src/pbrt/estimators.h file (default 11). You need to compile again the pbrt version. A value of 1, is equivalent to classical mean estimator ;
• PakMoN: is also enable on GPU using the nbuffers parameter value.

TODO:

• --independent: {bool} – adapt to GPU ;

Custom version [Features] #

Stereoscopic and AutoStereoscopic cameras #

Stereocopic camera example into .pbrt file:

Camera "stereoscopic" "float fov" 50
        "string view" "right" 
#        "string view" "left" 
       "float eyeDistance" [0.065]  

Note: it is necessary to generate the right and left images separately.

AutoStereocopic camera example into .pbrt file:

Camera "autostereoscopic" "float fov" 50
       "integer view" [7]
       "integer nbView" [8]
       "float eyeDistance" [0.065]

Note: only one view can be generated each time. The calculated view is based on the desired number of views but also on the distance fixed at eye level.

rgbcat2 #

rgbcat2 in an executable (available in build folder) in order to merge left and right images obtained from Stereoscopic camera.

Usage:

./rgbcat2 <image-left.png> <image-right.png> <output-image.png>