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libbsdf

Overview

libbsdf is a C++ library for BSDF, BRDF, and BTDF. libbsdf provides basic functions: file IO, interpolation, data structure and so on. Eigen 3 is used for arrays, vectors, and matrices. libbsdf is licensed under the terms of the Mozilla Public License, version 2.0. See the LICENSE file.

Building libbsdf

C++ compiler that supports C++17 is required. CMake is used as the build system. The search path for Eigen 3 is set through CMake variables: Eigen3_DIR. To enable the fitting function to reflectance models, enable LIBBSDF_ENABLE_FITTING and set the Ceres Solver path to the Ceres_DIR variable.

Data structure

• Scatter and specular data
  • BRDF
  • BTDF
  • Specular reflectance
  • Specular transmittance
• Color
  • Monochrome
  • RGB
  • XYZ
  • Spectrum
• Parameterization
  • Spherical coordinate system
  • Specular coordinate system
  • Half-difference coordinate system

File reader

File writer