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! Local: |
! Local: |
28 |
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29 |
DOUBLE PRECISION xo1, Xfi, xi, a0, a1, a2, a3, Xf1, Xprimin, xi2 |
DOUBLE PRECISION xo1, Xfi, xi, a0, a1, a2, a3, Xf1, Xprimin |
30 |
integer ii1, ii2, i, it, iter, idif, ii |
integer ii1, ii2, i, it, iter, idif, ii |
31 |
DOUBLE PRECISION, parameter:: my_eps = 1e-3 |
DOUBLE PRECISION, parameter:: my_eps = 1e-6 |
32 |
DOUBLE PRECISION xxprim(iim + 1), xvrai(iim + 1) |
DOUBLE PRECISION xxprim(iim + 1), xvrai(iim + 1) |
33 |
INTEGER:: is2 = 0 |
INTEGER:: is2 = 0 |
34 |
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35 |
!------------------------------------------------------------------ |
!------------------------------------------------------------------ |
36 |
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xo1 = 0. |
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37 |
IF (ik == 1 .and. grossismx == 1.) THEN |
IF (ik == 1 .and. grossismx == 1.) THEN |
38 |
ii1 = 2 |
ii1 = 2 |
39 |
ii2 = iim + 1 |
ii2 = iim + 1 |
58 |
it = 2 * nmax -1 |
it = 2 * nmax -1 |
59 |
END IF |
END IF |
60 |
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! Appel de la routine qui calcule les coefficients a0, a1, |
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! a2, a3 d'un polynome de degre 3 qui passe par les points |
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! (Xf(it), xtild(it)) et (Xf(it + 1), xtild(it + 1)) |
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61 |
CALL coefpoly(Xf(it), Xf(it + 1), Xprimt(it), Xprimt(it + 1), & |
CALL coefpoly(Xf(it), Xf(it + 1), Xprimt(it), Xprimt(it + 1), & |
62 |
xtild(it), xtild(it + 1), a0, a1, a2, a3) |
xtild(it), xtild(it + 1), a0, a1, a2, a3) |
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63 |
Xf1 = Xf(it) |
Xf1 = Xf(it) |
64 |
Xprimin = a1 + 2. * a2 * xi + 3. * a3 * xi**2 |
Xprimin = a1 + xi * (2d0 * a2 + xi * 3d0 * a3) |
65 |
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xo1 = xi |
66 |
iter = 1 |
iter = 1 |
67 |
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68 |
do |
do |
69 |
xi = xi - (Xf1 - Xfi) / Xprimin |
xi = xi - (Xf1 - Xfi) / Xprimin |
70 |
IF (ABS(xi - xo1) <= my_eps .or. iter == 300) exit |
IF (ABS(xi - xo1) <= my_eps .or. iter == 300) exit |
71 |
xo1 = xi |
xo1 = xi |
72 |
xi2 = xi * xi |
Xf1 = a0 + xi * (a1 + xi * (a2 + xi * a3)) |
73 |
Xf1 = a0 + a1 * xi + a2 * xi2 + a3 * xi2 * xi |
Xprimin = a1 + xi * (2d0 * a2 + xi * 3d0 * a3) |
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Xprimin = a1 + 2. * a2 * xi + 3. * a3 * xi2 |
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74 |
end DO |
end DO |
75 |
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76 |
if (ABS(xi - xo1) > my_eps) then |
if (ABS(xi - xo1) > my_eps) then |