Topological optimization based on discrete dipole approximation.
This is a DDA based topolgy optimization algorithm. A short quick start tutorial has been added. Better documentation is expected in the near future.
##sample There should be following sub directories in 'sample' so that the output result can be stored correctly: https://drive.google.com/drive/folders/1Zc4jiagSrwpxX7JAfLtOhTy6fVVLgq-P?usp=sharing