subroutine i2tri(bpe, pe, bpn, pn, add, irect, x, nb_nc, nb_ec, xyzm, i_add, nsv, i_amax, xmax, ymax, zmax, maxsiz, i_mem, nb_n_b, nsn, noint, tzinf, maxbox, minbox, j_stok, irtl, st, dmin, ignore, thk, knod2els, knod2elc, knod2eltg, nod2els, nod2elc, nod2eltg, nint, ixc, ixtg, thk_part, ipartc, geo, ixs, ixs10, pm, ixs16, ixs20, iparttg, id, titr, igeo, dsearch, pm_stack, iworksh, ix1, ix2, ix3, ix4, nsvg, prov_n, prov_e, n11, n12, n13, x1, x2, x3, x4, stif, y1, y2, y3, y4, z1, z2, z3, z4, xi, yi, zi, x0, y0, z0, nx1, ny1, nz1, nx2, ny2, nz2, nx3, ny3, nz3, nx4, ny4, nz4, p1, p2, p3, p4, lb1, lb2, lb3, lb4, lc1, lc2, lc3, lc4, s, t, ilev)