Function gmsh_sys::gmshModelMeshSplitQuadrangles

pub unsafe extern "C" fn gmshModelMeshSplitQuadrangles(
    quality: f64, 
    tag: c_int, 
    ierr: *mut c_int
)

Split (into two triangles) all quadrangles in surface tag whose quality is lower than quality. If tag < 0, split quadrangles in all surfaces.