| 1 | ;+ |
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| 2 | ; |
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| 3 | ; Resolution de l'equation A.X=b ou A est une matrice creuse |
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| 4 | ; et (x,b) sont des champs horizontaux |
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| 5 | ; |
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| 6 | ; @history |
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| 7 | ; Creation : printemps 1998 / G. Roullet |
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| 8 | ; |
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| 9 | ; @version |
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| 10 | ; $Id$ |
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| 11 | ; |
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| 12 | ;- |
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| 13 | FUNCTION inversion, b, GUESS = x, F = f, TOL = tol, _extra = extra |
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| 14 | @common |
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| 15 | @com_eg |
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| 16 | COMMON laplaciens, lapla_t, lapla_f |
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| 17 | |
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| 18 | IF (where(b NE 0))[0] EQ -1 THEN return, fltarr(jpi, jpj) |
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| 19 | |
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| 20 | IF n_elements(x) EQ 0 THEN x = fltarr(jpi, jpj) |
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| 21 | |
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| 22 | IF keyword_set(tol) EQ 0 THEN tol = 1e-3 |
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| 23 | |
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| 24 | print, ' Solver precision:', tol |
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| 25 | |
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| 26 | IF n_elements(f) EQ 0 THEN BEGIN |
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| 27 | IF n_elements(lapla_t) EQ 0 THEN build_laplacien_t |
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| 28 | A = lapla_t |
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| 29 | ENDIF ELSE BEGIN |
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| 30 | IF n_elements(lapla_f) EQ 0 THEN build_laplacien_f |
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| 31 | A = lapla_f |
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| 32 | ENDELSE |
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| 33 | |
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| 34 | zb = double(b) |
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| 35 | zx = double(x) |
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| 36 | |
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| 37 | zr = linbcg(A, zb(*), zx(*), tol = tol, iter = iter, /double, _extra = extra) |
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| 38 | print, ' Number of iterations :', iter |
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| 39 | |
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| 40 | zr = boundperio(reform(zr, jpi, jpj), ff = f) |
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| 41 | |
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| 42 | return, zr |
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| 43 | END |
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