GROMACSVirtualSite3fd pydantic model openff.interchange.interop.gromacs.models.models.GROMACSVirtualSite3fd[source] Bases: GROMACSVirtualSite GROMACS virtual site type 3fd. Fields a (float) d (float) func (int) header_tag (int) type (str) field type: str = '3fd' field header_tag: int = 3 field func: int = 2 field a: float [Required] field d: float [Required]