The project implicit illustrates the use of implicit surfaces. 
It defines an ascii based file format with extension "*.isd".
The project depends on the cgv-framework, that you can and install
along the Download and Fast Start description under:

https://sgumhold.github.io/cgv/install.html

You can build implicit with dlls or as a standalone executable.
You can bind file extension "*.isd" with the scripts
- register_isd_extension.bat   to the executable version
- register_isd_extension_dll.bat      to the dll version