Function gmsh_sys::gmshModelMeshClassifySurfaces

pub unsafe extern "C" fn gmshModelMeshClassifySurfaces(
    angle: f64, 
    boundary: c_int, 
    forReparametrization: c_int, 
    ierr: *mut c_int
)

Classify ("color") the surface mesh based on the angle threshold angle (in radians), and create new discrete surfaces, curves and points accordingly. If boundary is set, also create discrete curves on the boundary if the surface is open. If forReparametrization is set, create edges and surfaces that can be reparametrized using a single map.