pub unsafe extern "C" fn gmshModelGetNormal(
tag: c_int,
parametricCoord: *mut f64,
parametricCoord_n: usize,
normals: *mut *mut f64,
normals_n: *mut usize,
ierr: *mut c_int,
)Expand description
Get the normal to the surface with tag tag at the parametric coordinates
parametricCoord. parametricCoord are given by pairs of u and v
coordinates, concatenated: [p1u, p1v, p2u, …]. normals are returned as
triplets of x, y, z components, concatenated: [n1x, n1y, n1z, n2x, …].