The latest version of our program Chemcraft can read and visualize Gromacs .gro and .xtc files. We are thinking of implementing more features for working with Gromacs in Chemcraft. Currently we want to make Chemcraft read .trr files. Can I read somewhere the description of this format?
I don’t think there is a description. But the format is rather simple and should be easy to extract from the io implementation in trrio.cpp
Where I can download the trrio.cpp file?
It’s part of any GROMACS distribution. You can find it here on GitLab:
You probably also need to look at some of the gmxfio files to understand how each of the types are stored using XDR.