Function gmsh_sys::gmshModelGeoAddCircleArc

pub unsafe extern "C" fn gmshModelGeoAddCircleArc(
    startTag: c_int, 
    centerTag: c_int, 
    endTag: c_int, 
    tag: c_int, 
    nx: f64, 
    ny: f64, 
    nz: f64, 
    ierr: *mut c_int
) -> c_int

Add a circle arc (strictly smaller than Pi) between the two points with tags startTag and endTag, with center centertag. If tag is positive, set the tag explicitly; otherwise a new tag is selected automatically. If (nx, ny, nz) != (0,0,0), explicitly set the plane of the circle arc. Return the tag of the circle arc.