Function gmsh_sys::gmshModelGeoAddLine

pub unsafe extern "C" fn gmshModelGeoAddLine(
    startTag: c_int, 
    endTag: c_int, 
    tag: c_int, 
    ierr: *mut c_int
) -> c_int

Add a straight line segment between the two points with tags startTag and endTag. If tag is positive, set the tag explicitly; otherwise a new tag is selected automatically. Return the tag of the line.