cpp_reps

C++ project to compare search of different design representations against a target static shape, and later against a physical function.

Search methods used: nelder mead, gradient descent, EM and CMAES.

Representations

• global Representations
  • parametric frep (~ 5 parameters)
  • frep trees (~ 10 parameters)
  • dft (~ 20 parameters)
  • DNN/DMN (~ 100 parameters)
  • distance fields (~ 400 parameters)
  • point cloud/mesh (~ 1,000 parameters)
  • voxel search (~ 10,000 parameters)
• local
  • morphogenes
  • Arep
  • lsystems

Representation Comparison

Comparison Criteria

• Number of Parameters
• Expressiveness
• Convergence rate
• Best Score

Target Images

All target Images are 100*100

Example Best Results

• parametric frep (~ 5 parameters)
• frep trees (~ 10 parameters)
• dft (~ 20 parameters)
• DNN/DMN (~ 300 parameters)
  • cmaes

• sgd

• distance fields (~ 400 parameters)

• point cloud/mesh (~ 1,000 parameters)
• voxel search (~ 10,000 parameters)

dft progress

Dependencies

Similar to cpp_starter:

• a modern C++ compiler (i.e. one that supports C++17 features, ex. gcc 7+)
• cmake 3.13 or newer
• Eigen3 (installable via apt, yum, or homebrew)
• openCV (installable via apt, yum, or homebrew)
• json Library: https://github.com/nlohmann/json

Building

From the project's root directory,

mkdir build
cd build
cmake ..
make

Tips:

• you can build using multiple threads at once using e.g. make -j4
• you can specify a specific compiler using cmake .. -DCMAKE_CXX_COMPILER=g++-8
• for debugging symbols use cmake .. -DCMAKE_BUILD_TYPE=Debug

Running

From the build directory,

cpp_frep/cpp_frep
cpp_dnn/cpp_dnn
cpp_dft/cpp_dft
cpp_voxel/cpp_voxel