[2849] | 1 | MODULE compute_sections |
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| 2 | !!===================================================================== |
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| 3 | !! *** MODULE diadct *** |
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| 4 | !! Ocean diagnostics: Compute the transport trough a sec. |
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| 5 | !! |
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| 6 | !! |
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| 7 | !! History: 2011: cbricaud Mercator-Ocean |
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| 8 | !!=============================================================== |
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| 9 | !! * Modules used |
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| 10 | USE declarations |
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| 11 | USE sections_tools |
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| 12 | |
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| 13 | IMPLICIT NONE |
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| 14 | PRIVATE |
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| 15 | |
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| 16 | !! * Routine accessibility |
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| 17 | PUBLIC compsec |
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| 18 | |
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| 19 | !! * Module variables |
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| 20 | |
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| 21 | CONTAINS |
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| 22 | |
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| 23 | SUBROUTINE compsec(jsec,sec,lkdebug) |
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| 24 | !!--------------------------------------------------------------------- |
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| 25 | !! *** ROUTINE compsec *** |
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| 26 | !! |
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| 27 | !! ** Purpose : Compute the serie of mesh's points that represents the section |
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| 28 | !! defined by its extremities. |
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| 29 | !! |
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| 30 | !! ** Method : |
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| 31 | !! I. Found which cells of the mesh the section is crossing |
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| 32 | !! II. Classification of the intersections mesh/section |
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| 33 | !! -first classification west to east |
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| 34 | !! -second classification south to north |
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| 35 | !! III. Find extremities of section in the mesh |
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| 36 | !! IV. Find the serie of mesh's points that form the section |
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| 37 | !! ** Input: sec : the section to compute |
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| 38 | !! |
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| 39 | !! ** Output: |
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| 40 | !!--------------------------------------------------------------------- |
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| 41 | !! * Arguments |
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| 42 | INTEGER,INTENT(IN) :: jsec !number of the section |
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| 43 | TYPE(SECTION), INTENT(INOUT) :: sec !information about the section |
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| 44 | LOGICAL ,INTENT(IN) :: lkdebug !debug or not debug this section |
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| 45 | |
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| 46 | !! * Local variables |
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| 47 | INTEGER :: & |
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| 48 | ji,jj , & ! dummy loop argument |
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| 49 | jseg , & ! loop on segments taht form the section |
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| 50 | nb_inmesh , & ! number of intersection between section and the mesh |
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| 51 | nmesh ! number of cells in processor domain |
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| 52 | REAL(wp),SAVE :: zdistmesh ! Taller cell of the mesh in ocean |
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| 53 | REAL(wp) :: & |
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| 54 | zdistEst , zdistNorth , zdistWest , zdistSouth , &! temporary scalars |
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| 55 | zdistEst2 , zdistNorth2, zdistWest2, zdistSouth2, &! temporary scalars |
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| 56 | zdistEst3 , zdistNorth3, zdistWest3, zdistSouth3, &! temporary scalars |
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| 57 | zdistFirst , zdistLast , zdistref , &! " |
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| 58 | zdistante , zdistante2 , zdistnew , zdistnew2 , &! " |
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| 59 | zdeltai , zdeltaj ! " |
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| 60 | ! REAL(wp),DIMENSION(:,:),ALLOCATABLE,SAVE :: zmask |
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| 61 | LOGICAL :: & |
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| 62 | ll_overlap_sec_left = .FALSE. , ll_overlap_sec_right = .FALSE. ,&! temporary logical |
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| 63 | ll_date_domain_left = .FALSE. , ll_date_domain_right = .FALSE. ,&! " |
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| 64 | ll_overlap_sec = .FALSE. , ll_date_domain = .FALSE. ,&! " |
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| 65 | ll_test = .FALSE. ! " |
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| 66 | LOGICAL :: lest, lwest, lnorth, lsouth |
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| 67 | LOGICAL :: l_oldmethod |
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| 68 | CHARACTER(len=120) :: cltmp |
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| 69 | TYPE(COORD_SECTION) :: & |
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| 70 | coord_a , coord_b , coord_d , coord_t , &!temporary point (long/lat) |
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| 71 | coordFirst, coordLast, coordTemp ! " |
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| 72 | TYPE(COORD_SECTION), DIMENSION(nb_point_max) :: coordSec !intersections mesh/section |
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| 73 | TYPE(POINT_SECTION) :: & |
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| 74 | endingPoint, prevPoint , nextPoint, &!temporary point (I/J) |
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| 75 | SouthPoint , NorthPoint, EstPoint , WestPoint ! " |
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| 76 | !!--------------------------------------------------------------------- |
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| 77 | IF ( jsec==1 )THEN |
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| 78 | PRINT*,' ' |
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| 79 | PRINT*,'COMPUTE SECTIONS' |
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| 80 | PRINT*,'----------------' |
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| 81 | ENDIF |
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| 82 | |
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| 83 | !debug |
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| 84 | CALL write_debug(jsec,'compute section:') |
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| 85 | CALL write_debug(jsec,'================') |
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| 86 | |
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| 87 | |
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| 88 | !==================! |
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| 89 | !0. Initializations! |
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| 90 | !==================! |
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| 91 | |
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| 92 | nmesh = jpi*jpj ! number of cells in processor domain |
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| 93 | nb_inmesh = 0 !initialize number of intersection between section and the mesh |
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| 94 | zdistEst =0. ; zdistNorth=0. ; zdistWest=0. ; zdistSouth=0. ! temporary scalars |
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| 95 | zdistFirst=0. ; zdistLast =0. ! " |
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| 96 | zdistante =0. ; zdistante2=0. ; zdistnew=0. ; zdistnew2=0. ! " |
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| 97 | zdeltai=0. ; zdeltaj=0. |
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| 98 | coord_a = COORD_SECTION( 0., 0. ) ; coord_b = COORD_SECTION( 0., 0. ) |
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| 99 | coord_d = COORD_SECTION( 0., 0. ) ; coord_t = COORD_SECTION( 0., 0. ) |
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| 100 | coordFirst = COORD_SECTION( 0., 0. ) ; coordLast = COORD_SECTION( 0., 0. ) |
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| 101 | coordTemp = COORD_SECTION( 0., 0. ) ; coordSec = COORD_SECTION( 0., 0. ) |
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| 102 | endingPoint = POINT_SECTION( -1, -1 ) |
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| 103 | prevPoint = POINT_SECTION( -1, -1 ) ; nextPoint = POINT_SECTION( -1, -1 ) |
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| 104 | SouthPoint = POINT_SECTION( -1, -1 ) ; NorthPoint = POINT_SECTION( -1, -1 ) |
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| 105 | EstPoint = POINT_SECTION( -1, -1 ) ; WestPoint = POINT_SECTION( -1, -1 ) |
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| 106 | |
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| 107 | !PRINT*,"min max tmask ",MINVAL(tmask),MAXVAL(tmask) |
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| 108 | |
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| 109 | IF (jsec == 1)THEN |
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| 110 | !Found the taller cell of the mesh in ocean (used in compsec) |
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| 111 | zdistmesh=0. |
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| 112 | DO jj=2,nlej |
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| 113 | DO ji=2,nlei |
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| 114 | IF( zdistmesh .LT. & |
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| 115 | !(e1t(ji,jj)/(cos(gphit(ji,jj))*110000)) *tmask(ji,jj,1 ) ) THEN |
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| 116 | !zdistmesh = e1t(ji,jj)/(cos(gphit(ji,jj))*110000)*tmask(ji,jj,1 ) |
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| 117 | (e1t(ji,jj)/(cos(gphit(ji,jj))*110000)) ) THEN |
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| 118 | zdistmesh = e1t(ji,jj)/(cos(gphit(ji,jj))*110000) |
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| 119 | ENDIF |
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| 120 | ENDDO |
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| 121 | ENDDO |
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| 122 | |
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| 123 | !Compute array zmask used later to avoid array overflow |
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| 124 | !ALLOCATE(zmask(jpi,jpj)) |
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| 125 | !zmask(:,:)=tmask(:,:,1) |
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| 126 | !DO jj=3,nlcj-2 |
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| 127 | ! DO ji=3,nlci-2 |
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| 128 | ! zmask(ji,jj) = MIN( 1., tmask(ji ,jj ,1) & |
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| 129 | ! + tmask(ji-1,jj ,1) + tmask(ji+1,jj ,1) & |
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| 130 | ! + tmask(ji-2,jj ,1) + tmask(ji+2,jj ,1) & |
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| 131 | ! + tmask(ji ,jj-1,1) + tmask(ji ,jj+1,1) & |
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| 132 | ! + tmask(ji ,jj-2,1) + tmask(ji ,jj+2,1) & |
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| 133 | ! + tmask(ji-1,jj-1,1) + tmask(ji+1,jj-1,1) & |
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| 134 | ! + tmask(ji-1,jj+1,1) + tmask(ji+1,jj+1,1) ) |
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| 135 | ! ENDDO |
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| 136 | !ENDDO |
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| 137 | |
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| 138 | ENDIF |
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| 139 | !PRINT*,"min max zmask ",MINVAL(zmask),MAXVAL(zmask) |
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| 140 | |
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| 141 | !debug |
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| 142 | WRITE(cltmp,'(A10,f10.3)')'zdistmesh = ',zdistmesh |
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| 143 | CALL write_debug(jsec,cltmp) |
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| 144 | |
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| 145 | !===========================================================! |
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| 146 | !I. Found which cells of the mesh the section is crossing ! |
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| 147 | !===========================================================! |
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| 148 | |
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| 149 | !loop on the mesh |
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| 150 | DO jj=2,nlcj |
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| 151 | DO ji=2,nlci |
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| 152 | !----------------------------------------------------------- |
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| 153 | !For each cell of the mesh, we find the intersection between |
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| 154 | !the section and the cell as described below: |
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| 155 | !The cell is defined by 4 points A B C D |
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| 156 | !and the section by S1 and S2 |
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| 157 | ! |
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| 158 | !Section\ ________ |
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| 159 | ! \ B| | |
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| 160 | ! \ | | |
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| 161 | ! \|one cell| |
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| 162 | ! .....\ | |
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| 163 | ! |\ | |
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| 164 | ! | \ | |
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| 165 | ! A|__\_____|D |
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| 166 | ! ........\ |
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| 167 | !----------------\------------------------------------------- |
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| 168 | |
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| 169 | !definition of points A,B,D (we don't need C) |
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| 170 | coord_a = COORD_SECTION( glamf(ji-1,jj-1) ,gphif(ji-1,jj-1) ) |
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| 171 | coord_b = COORD_SECTION( glamf(ji-1,jj) ,gphif(ji-1,jj) ) |
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| 172 | coord_d = COORD_SECTION( glamf(ji,jj-1) ,gphif(ji,jj-1) ) |
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| 173 | |
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| 174 | !size of the cell |
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| 175 | zdeltai= glamf(ji-1,jj) - glamf(ji-1,jj-1) !zdeltai=[AB] |
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| 176 | zdeltaj= gphif(ji,jj-1) - gphif(ji-1,jj-1) !zdeltaj=[AD] |
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| 177 | |
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| 178 | IF (ABS(zdeltai) .LE. 2.*zdistmesh .OR. & |
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| 179 | ABS(zdeltaj) .LE. 2.*zdistmesh) THEN |
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| 180 | |
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| 181 | !intersection section/[AB]=? |
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| 182 | coordTemp = intersec(sec,coord_a,coord_b) !compute intersection |
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| 183 | coordTemp%lon = coordTemp%lon !* zmask(ji,jj)-9999.*(1-zmask(ji,jj)) |
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| 184 | coordTemp%lat = coordTemp%lat !* zmask(ji,jj)-9999.*(1-zmask(ji,jj)) |
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| 185 | |
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| 186 | IF(coordTemp%lon .NE. -9999) THEN |
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| 187 | IF(nb_inmesh+1 .GT. nb_point_max) THEN |
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| 188 | PRINT*,"WARNING diadct: nb_point_max needs to be greater than ", nb_inmesh |
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| 189 | ELSE |
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| 190 | nb_inmesh=nb_inmesh+1 |
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| 191 | coordSec(nb_inmesh) = coordTemp !store the intersection's coordinates |
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| 192 | |
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| 193 | !We need to know if the section crosses the overlapping band. |
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| 194 | |
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| 195 | !Fist we look if there is an intersection mesh/section |
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| 196 | !just on the left of the overlapping band: |
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| 197 | IF(coordTemp%lon .GT. glamf(1,1)-5 .AND. coordTemp%lon .LT. glamf(1,1)) & |
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| 198 | & ll_overlap_sec_left = .TRUE. |
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| 199 | !And we look if there is an intersection mesh/section |
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| 200 | !just on the right of the overlapping band: |
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| 201 | IF(coordTemp%lon .GT. glamf(nlci,1) .AND. coordTemp%lon .LT. glamf(1,1)+5) & |
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| 202 | & ll_overlap_sec_right = .TRUE. |
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| 203 | ENDIF |
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| 204 | ENDIF |
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| 205 | |
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| 206 | !intersection section/[AD]=? |
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| 207 | coordTemp=intersec(sec,coord_a,coord_d) !compute intersection |
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| 208 | coordTemp%lon = coordTemp%lon !* zmask(ji,jj)-9999.*(1-zmask(ji,jj)) |
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| 209 | coordTemp%lat = coordTemp%lat !* zmask(ji,jj)-9999.*(1-zmask(ji,jj)) |
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| 210 | |
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| 211 | IF(coordTemp%lon .NE. -9999) THEN |
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| 212 | IF(nb_inmesh+1 .GT. nb_point_max) THEN |
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| 213 | PRINT*, "WARNING diadct: nb_point_max needs to be greater than ", nb_inmesh |
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| 214 | ELSE |
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| 215 | nb_inmesh=nb_inmesh+1 |
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| 216 | coordSec(nb_inmesh)=coordTemp |
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| 217 | |
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| 218 | !We need to know if the section crosses the overlapping band: |
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| 219 | !same test as above |
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| 220 | IF(coordTemp%lon .GE. glamf(1,1)-3 .AND. coordTemp%lon .LE. glamf(1,1)) & |
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| 221 | & ll_overlap_sec_left = .TRUE. |
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| 222 | IF(coordTemp%lon .GE. glamf(nlci,1) .AND. coordTemp%lon .LE. glamf(nlci,1)+3) & |
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| 223 | & ll_overlap_sec_right = .TRUE. |
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| 224 | ENDIF |
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| 225 | ENDIF |
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| 226 | |
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| 227 | ENDIF |
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| 228 | |
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| 229 | !We need to know if the domain crosses the date line: |
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| 230 | !Fist, we search a mesh point that is just one the left of date line: |
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| 231 | IF( glamf(ji-1,jj-1) .GT. 175 .AND. glamf(ji-1,jj-1) .LT. 180 ) & |
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| 232 | & ll_date_domain_left = .TRUE. |
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| 233 | !And we search a mesh point that is just one the right of date line: |
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| 234 | IF( glamf(ji-1,jj-1) .GT. -180 .AND. glamf(ji-1,jj-1) .LT. -175 ) & |
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| 235 | & ll_date_domain_right = .TRUE. |
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| 236 | |
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| 237 | !End of the loop on the mesh |
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| 238 | ENDDO |
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| 239 | ENDDO |
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| 240 | |
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| 241 | !Crossing section/overlapping band (we need to know it for later): |
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| 242 | !----------------------------------------------------------------- |
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| 243 | !If there is one intersection mesh/section just on the left of |
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| 244 | !the overlapping band (ll_overlap_sec_left = .TRUE.) |
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| 245 | !AND there is one just the right of the overlapping band |
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| 246 | !(ll_overlap_sec_right = .TRUE.), |
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| 247 | !so the section crosses the overlapping band. |
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| 248 | ll_overlap_sec = ll_overlap_sec_left .AND. ll_overlap_sec_right |
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| 249 | |
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| 250 | !Crossing of the domain and the date line (we need to know it for later): |
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| 251 | !------------------------------------------------------------------------ |
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| 252 | !If there is one point of the domain that is just on the left of the date line |
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| 253 | !(ll_date_domain_left = .TRUE.) AND one point that is just on the right of the |
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| 254 | !date line (ll_date_domain_right = .TRUE. ) |
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| 255 | !So the domain crosses the date line: |
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| 256 | ll_date_domain = ll_date_domain_left .AND. ll_date_domain_right |
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| 257 | |
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| 258 | !=====================================================! |
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| 259 | ! II. Classification of the intersections mesh/section! |
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| 260 | !=====================================================! |
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| 261 | |
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| 262 | ! -first classification west to east |
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| 263 | ! -second classification south to north |
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| 264 | !CAUTION: routine qcksrt doesn't work in the same way if the section |
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| 265 | !and the domain crosse the date line (sec%ll_date_line=T and ll_date_domain=T) |
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| 266 | |
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| 267 | IF( sec%ll_date_line .AND. ll_date_domain )THEN |
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| 268 | !we add 360° to negative longitudes to have a good classification |
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| 269 | DO jseg=1,nb_inmesh |
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| 270 | IF( coordSec(jseg)%lon .LT. 0 ) coordSec(jseg)%lon=coordSec(jseg)%lon+360. |
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| 271 | ENDDO |
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| 272 | IF ( sec%coordSec(1)%lon .NE. sec%coordSec(2)%lon ) THEN |
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| 273 | CALL qcksrt(coordSec(:)%lon,coordSec(:)%lat,nb_inmesh) |
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| 274 | ELSE |
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| 275 | CALL qcksrt(coordSec(:)%lat,coordSec(:)%lon,nb_inmesh) |
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| 276 | ENDIF |
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| 277 | DO jseg=1,nb_inmesh |
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| 278 | IF( coordSec(jseg)%lon .GT. 180 ) coordSec(jseg)%lon=coordSec(jseg)%lon-360. |
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| 279 | ENDDO |
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| 280 | ELSE |
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| 281 | IF ( sec%coordSec(1)%lon .NE. sec%coordSec(2)%lon ) THEN |
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| 282 | CALL qcksrt(coordSec(:)%lon,coordSec(:)%lat,nb_inmesh) |
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| 283 | ELSE |
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| 284 | CALL qcksrt(coordSec(:)%lat,coordSec(:)%lon,nb_inmesh) |
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| 285 | ENDIF |
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| 286 | ENDIF |
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| 287 | |
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| 288 | !debug |
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| 289 | WRITE(cltmp,'(A20,i3.3)')'number intersections = ',nb_inmesh ; CALL write_debug(jsec,cltmp) |
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| 290 | CALL write_debug(jsec,'List of intersections between grid and section: ') |
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| 291 | DO jseg=1,nb_inmesh |
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| 292 | WRITE(cltmp,'(i4.4,1X,2(f8.3,1X) )')jseg,coordSec(jseg) ; CALL write_debug(jsec,cltmp) |
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| 293 | ENDDO |
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| 294 | |
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| 295 | !=====================================================! |
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| 296 | ! III. Find extremities of section in the mesh ! |
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| 297 | !=====================================================! |
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| 298 | !we can find section's extremities in the mesh only if |
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| 299 | !there is intersection between section and mesh (nb_inmesh .ne. 0) |
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| 300 | |
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| 301 | IF( nb_inmesh .ne. 0 )THEN |
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| 302 | coordFirst = coordSec(1) |
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| 303 | coordLast = coordSec(nb_inmesh) |
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| 304 | sec%nb_point = nb_inmesh |
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| 305 | sec%listPoint(1) = POINT_SECTION(-1,-1) |
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| 306 | zdistante = 1000. |
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| 307 | zdistante2 = 1000. |
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| 308 | |
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| 309 | !First, we find the point of the mesh that is the closest |
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| 310 | !to the first intersection section/mesh (=coordFirst=coordSec(1)): |
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| 311 | !this point will be called sec%listPoint(1). |
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| 312 | !Then, we find the point of the mesh that is the closest |
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| 313 | !to the last intersection section/mesh (coordLast=coordSec(nb_inmesh)) |
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| 314 | !this point will be called endingPoint. |
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| 315 | |
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| 316 | DO jj=1,nlej |
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| 317 | DO ji=1,nlei |
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| 318 | coord_t=COORD_SECTION(glamf(ji,jj),gphif(ji,jj)) |
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| 319 | zdistFirst = distance(coord_t,coordFirst) |
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| 320 | zdistLast = distance(coord_t,coordLast) |
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| 321 | IF( zdistFirst .LT. zdistmesh .AND. zdistFirst .LT. zdistante )THEN |
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| 322 | sec%listPoint(1) = POINT_SECTION(ji,jj) |
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| 323 | zdistante=zdistFirst |
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| 324 | ENDIF |
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| 325 | IF( zdistLast .LT. zdistmesh .AND. zdistLast .LT. zdistante2 )THEN |
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| 326 | endingPoint = POINT_SECTION(ji,jj) |
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| 327 | zdistante2=zdistLast |
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| 328 | ENDIF |
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| 329 | ENDDO |
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| 330 | ENDDO |
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| 331 | |
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| 332 | IF( sec%listPoint(1)%I == endingPoint%I .AND. sec%listPoint(1)%J == endingPoint%J )THEN |
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| 333 | sec%listPoint(1) = POINT_SECTION(-1,-1) |
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| 334 | endingPoint = POINT_SECTION(-1,-1) |
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| 335 | coordFirst = coordSec(1) |
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| 336 | coordLast = coordSec(2) |
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| 337 | sec%nb_point = 0 |
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| 338 | ENDIF |
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| 339 | |
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| 340 | ELSE |
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| 341 | !If there is no intersection section/mesh |
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| 342 | sec%listPoint(1) = POINT_SECTION(-1,-1) |
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| 343 | endingPoint = POINT_SECTION(-1,-1) |
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| 344 | coordFirst = coordSec(1) |
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| 345 | coordLast = coordSec(2) |
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| 346 | sec%nb_point = 0 |
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| 347 | ENDIF |
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| 348 | |
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| 349 | !debug |
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| 350 | CALL write_debug(jsec,"extremities of section in the grid : ") |
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| 351 | ji=sec%listPoint(1)%I ; jj=sec%listPoint(1)%J |
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| 352 | WRITE(cltmp,'(A15,X,i4.4,X,i4.4,X,f8.3,X,f8.3)')'First point: ',sec%listPoint(1),glamf(ji,jj),gphif(ji,jj) |
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| 353 | CALL write_debug(jsec,cltmp) |
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| 354 | ji=endingPoint%I ; jj=endingPoint%J |
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| 355 | WRITE(cltmp,'(A15,X,i4.4,X,i4.4,X,f8.3,X,f8.3)')'Last point: ',endingPoint,glamf(ji,jj),gphif(ji,jj) |
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| 356 | CALL write_debug(jsec,cltmp) |
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| 357 | ! |
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| 358 | coord_a=pointToCoordF(sec%listPoint(1)) ; coord_b=pointToCoordF(endingPoint) |
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| 359 | ll_test = .FALSE. |
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| 360 | IF( ll_date_domain .AND. ABS( coord_a%lon - coord_b%lon ).GT. 180) ll_test= .TRUE. |
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| 361 | zdistante=distance2(coord_a,coord_b ,ll_test ) |
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| 362 | WRITE(cltmp,'(A20,f10.3)' )'distance between IJ-extremities : ',zdistante |
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| 363 | CALL write_debug(jsec,cltmp) |
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| 364 | ! |
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| 365 | CALL write_debug(jsec,"Initial extremities : ") |
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| 366 | WRITE(cltmp,'( 2(f9.3),A3,2(f9.3) )')coordFirst,'---',coordLast |
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| 367 | CALL write_debug(jsec,cltmp) |
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| 368 | ll_test = .FALSE. |
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| 369 | IF( ll_date_domain .AND. ABS(coordFirst%lon - coordLast%lon).GT. 180)ll_test= .TRUE. |
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| 370 | zdistante=distance2(coordFirst,coordLast,ll_test) |
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| 371 | WRITE(cltmp,'(A30,f10.3)')' distance between initial extremities : ',zdistante |
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| 372 | CALL write_debug(jsec,cltmp) |
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| 373 | CALL write_debug(jsec," ") |
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| 374 | |
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| 375 | !==========================================================! |
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| 376 | ! IV. Find the serie of mesh's points that form the section! |
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| 377 | !==========================================================! |
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| 378 | CALL write_debug(jsec,"Find the serie of mesh's points that form the section") |
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| 379 | |
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| 380 | IF( nb_inmesh .NE. 0 )THEN |
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| 381 | |
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| 382 | !The serie of mesh's points that form the section will 'link' |
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| 383 | !sec%listPoint(1) to endingPoint: it will be stored in |
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| 384 | !sec%listPoint(jseg) |
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| 385 | ! |
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| 386 | !We take place on the fist point (sec%listPoint(1)) |
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| 387 | ! a. We find the 4 adjacent points (North, South, East, West) |
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| 388 | ! b. Compute distance between current point and endingPoint |
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| 389 | ! c. Compute distance between the 4 adjacent points and endingPoint |
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| 390 | ! d. Select the points which are closer to end-point than current point |
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| 391 | ! e.1 If at least one point is selected, select the point which is closest to original section among selected points |
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| 392 | ! e.2 If no point is selected, select the point which is the closest to end-point |
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| 393 | ! f. save next point and direction of velocity. |
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| 394 | ! g. Save nextPoint and go to nextPoint |
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| 395 | ! |
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| 396 | !We get out of this loop if: |
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| 397 | ! - we are on endingPoint |
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| 398 | ! - the number of points (jseg) that link sec%listPoint(1) to endingPoint is |
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| 399 | ! twice greater than number of section/mesh intersection (nb_inmesh): |
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| 400 | ! it could be possible if thr algorithm can't link endingPoint (bug). |
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| 401 | |
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| 402 | !initialize distnew value (with distance between section's extremities) |
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| 403 | zdistnew = distance(coordFirst,coordLast,sec%ll_date_line) |
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| 404 | prevPoint = POINT_SECTION(0,0) |
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| 405 | jseg = 1 |
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| 406 | |
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| 407 | DO WHILE ( ( sec%listPoint(jseg)%I .NE. endingPoint%I & |
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| 408 | .OR. sec%listPoint(jseg)%J .NE. endingPoint%J ) & |
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| 409 | .AND. jseg .LT. 500 .AND. sec%listPoint(jseg)%I .GT. 0 ) |
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| 410 | |
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| 411 | ! a. find the 4 adjacent points (North, South, East, West) |
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| 412 | !--------------------------------------------------------- |
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| 413 | SouthPoint = POINT_SECTION(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J-1) |
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| 414 | NorthPoint = POINT_SECTION(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J+1) |
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| 415 | WestPoint = POINT_SECTION(sec%listPoint(jseg)%I-1,sec%listPoint(jseg)%J) |
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| 416 | EstPoint = POINT_SECTION(sec%listPoint(jseg)%I+1,sec%listPoint(jseg)%J) |
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| 417 | |
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| 418 | !debug |
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| 419 | CALL write_debug(jsec,"---------------") |
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| 420 | WRITE(cltmp,100)'Current points: ',sec%listPoint(jseg), & |
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| 421 | glamf(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J), & |
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| 422 | gphif(sec%listPoint(jseg)%I,sec%listPoint(jseg)%J) |
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| 423 | CALL write_debug(jsec,cltmp) |
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| 424 | CALL write_debug(jsec,"E/W/N/S points") |
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| 425 | WRITE(cltmp,101)glamf( EstPoint%I,EstPoint%J) ,gphif( EstPoint%I, EstPoint%J), & |
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| 426 | glamf( WestPoint%I,WestPoint%J) ,gphif( WestPoint%I, WestPoint%J), & |
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| 427 | glamf(NorthPoint%I,NorthPoint%J),gphif(NorthPoint%I,NorthPoint%J) ,& |
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| 428 | glamf(SouthPoint%I,SouthPoint%J),gphif(SouthPoint%I,SouthPoint%J) |
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| 429 | CALL write_debug(jsec,cltmp) |
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| 430 | WRITE(cltmp,102)EstPoint,WestPoint,NorthPoint,SouthPoint |
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| 431 | CALL write_debug(jsec,cltmp) |
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| 432 | |
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| 433 | 100 FORMAT ( A15,2(i4.4," "),2(f7.3," ") ) |
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| 434 | 101 FORMAT ( "E ",2(f7.3," "),"W ",2(f7.3," "),"N ",2(f7.3," "),"S ",2(f7.3," ")) |
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| 435 | 102 FORMAT ( "E ",i4.4,' 'i4.4,"//W ",i4.4,' ',i4.4,"//N ",i4.4,' ',i4.4,"//S ",i4.4,' ',i4.4 ) |
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| 436 | |
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| 437 | |
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| 438 | !we are on end-point |
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| 439 | !-------------------- |
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| 440 | IF( SouthPoint%I==endingPoint%I .AND. SouthPoint%J==endingPoint%J )THEN |
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| 441 | jseg = jseg+1 ; sec%listPoint(jseg) = SouthPoint |
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| 442 | ELSE IF( NorthPoint%I==endingPoint%I .AND. NorthPoint%J==endingPoint%J )THEN |
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| 443 | jseg = jseg+1 ; sec%listPoint(jseg) = NorthPoint |
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| 444 | ELSE IF( WestPoint%I==endingPoint%I .AND. WestPoint%J==endingPoint%J )THEN |
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| 445 | jseg = jseg+1 ; sec%listPoint(jseg) = WestPoint |
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| 446 | ELSE IF( EstPoint%I==endingPoint%I .AND. EstPoint%J==endingPoint%J )THEN |
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| 447 | jseg = jseg+1 ; sec%listPoint(jseg) = EstPoint |
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| 448 | |
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| 449 | ELSE |
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| 450 | !we are NOT on end-point |
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| 451 | !------------------------ |
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| 452 | |
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| 453 | ! b. distance between current point and endingPoint |
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| 454 | !-------------------------------------------------- |
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| 455 | zdistante = zdistnew |
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| 456 | |
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| 457 | ! c. compute distance between the 4 adjacent points and endingPoint |
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| 458 | !------------------------------------------------------------------ |
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| 459 | ! BE CARREFUL! When the domain crosses the date line (ll_date_domain): |
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| 460 | ! When we will compute distances between W/E/S/N points and endingPoint, |
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| 461 | ! we have to check if theses 4 lines crosses the date line |
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| 462 | ! (test: ABS(coordTemp%lon - coordLast%lon).GT. 180) |
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| 463 | ! If it's true,we have to add 360° to coordLast%long to compute the |
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| 464 | ! good distance through the date line and not through the complementary |
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| 465 | ! in the mesh. |
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| 466 | |
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| 467 | ! c.1 compute distWest: distance between west point and endingPoint |
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| 468 | !---------------------- |
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| 469 | zdistWest2 = 99999999.9 ; zdistWest3 = 99999999.9 |
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| 470 | IF( sec%listPoint(jseg)%I .NE. 1 )THEN |
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| 471 | !When we are on the west side of the mesh (i=1),we can't go to the west. |
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| 472 | coordTemp = pointToCoordF(WestPoint) |
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| 473 | ll_test = .FALSE. |
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| 474 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test = .TRUE. |
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| 475 | zdistWest2 = distance2(pointToCoordF(WestPoint) ,coordLast ,ll_test) |
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| 476 | ENDIF |
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| 477 | |
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| 478 | ! c.2 compute distEst: distance between east point and endingPoint |
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| 479 | !--------------------- |
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| 480 | zdistEst2 = 99999999.9 ; zdistEst3 = 99999999.9 |
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| 481 | IF( sec%listPoint(jseg)%I .EQ. nlci )THEN |
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| 482 | !We test if the current point is on the east side of the mesh |
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| 483 | ! The method is done such as we go toward east to link |
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| 484 | ! sec%listPoint(1) to endingPoint. |
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| 485 | ! So, if the section crosses the overlapping band (ll_overlap_sec=T), |
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| 486 | ! we won't have to stop if the current point is on the EAST side of the mesh: |
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| 487 | ! we have to follow the construction of the section on the |
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| 488 | ! WEST side of the mesh |
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| 489 | IF( ll_overlap_sec )THEN |
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| 490 | !section crosses the overlapping band |
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| 491 | !So EstPoint is on the west side of the mesh |
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| 492 | EstPoint = POINT_SECTION(3,sec%listPoint(jseg)%J) |
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| 493 | zdistEst2= distance2(pointToCoordF(EstPoint) ,coordLast ,.FALSE.) |
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| 494 | ENDIF |
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| 495 | ELSE |
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| 496 | coordTemp = pointToCoordF(EstPoint) |
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| 497 | ll_test = .FALSE. |
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| 498 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test= .TRUE. |
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| 499 | zdistEst2 = distance2(pointToCoordF(EstPoint) ,coordLast ,ll_test ) |
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| 500 | ENDIF |
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| 501 | |
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| 502 | ! c.3 compute distSouth: distance between south point and endingPoint |
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| 503 | !----------------------- |
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| 504 | zdistSouth2 = 99999999.9 ; zdistSouth3 = 99999999.9 |
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| 505 | IF( sec%listPoint(jseg)%J .NE. 1 )THEN |
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| 506 | !When we are on the south side of the mesh (j=1),we can't go to the south. |
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| 507 | coordTemp=pointToCoordF(SouthPoint) |
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| 508 | ll_test = .FALSE. |
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| 509 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test= .TRUE. |
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| 510 | zdistSouth2 = distance2(pointToCoordF(SouthPoint),coordlast ,ll_test ) |
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| 511 | ENDIF |
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| 512 | |
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| 513 | ! c.4 compute distNorth: distance between north and endingPoint |
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| 514 | !----------------------- |
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| 515 | zdistNorth2 = 99999999.9 ; zdistNorth3 = 99999999.9 |
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| 516 | IF( sec%listPoint(jseg)%J .NE. nlcj )THEN |
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| 517 | !When we are on the north side of the mesh (j=nlcj),we can't go to the south. |
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| 518 | coordTemp=pointToCoordF(NorthPoint) |
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| 519 | ll_test = .FALSE. |
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| 520 | IF( ll_date_domain .AND. ABS(coordTemp%lon - coordLast%lon).GT. 180 )ll_test= .TRUE. |
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| 521 | zdistNorth2 = distance2(pointToCoordF(NorthPoint),coordlast ,ll_test ) |
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| 522 | ENDIF |
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| 523 | |
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| 524 | ! d. select the points which are closer to end-point than current point |
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| 525 | !---------------------------------------------------------------------- |
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| 526 | zdistref=distance2(pointToCoordF(sec%listPoint(jseg)),coordlast ,ll_test ) |
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| 527 | WRITE(cltmp,'( A56,f10.3 )' )'distance between actual point and last point: zdistref = ',zdistref |
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| 528 | CALL write_debug(jsec,cltmp) |
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| 529 | lest = .FALSE. ; IF( zdistEst2 .LE. zdistref ) lest = .TRUE. |
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| 530 | lwest = .FALSE. ; IF( zdistwest2 .LE. zdistref ) lwest = .TRUE. |
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| 531 | lnorth = .FALSE. ; IF( zdistnorth2 .LE. zdistref ) lnorth= .TRUE. |
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| 532 | lsouth = .FALSE. ; IF( zdistsouth2 .LE. zdistref ) lsouth= .TRUE. |
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| 533 | |
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| 534 | !debug |
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| 535 | IF( .NOT. lest )CALL write_debug(jsec,'Est point eliminated') |
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| 536 | IF( .NOT. lwest )CALL write_debug(jsec,'West point eliminated') |
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| 537 | IF( .NOT. lnorth )CALL write_debug(jsec,'North point eliminated') |
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| 538 | IF( .NOT. lsouth )CALL write_debug(jsec,'South point eliminated') |
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| 539 | |
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| 540 | l_oldmethod = .FALSE. |
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| 541 | |
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| 542 | IF( ( COUNT((/lest/))+COUNT((/lwest/))+COUNT((/lnorth/))+COUNT((/lsouth/)) ) .NE. 0 )THEN |
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| 543 | |
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| 544 | ! e.1 If at least one point is selected, select the point |
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| 545 | ! which is the closest to original section among selected points |
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| 546 | !------------------------------------------------------------------- |
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| 547 | |
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| 548 | zdistWest3 = 9999999.9 |
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| 549 | IF( lwest )zdistWest3 = & |
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| 550 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(WestPoint) ,pointToCoordF(endingPoint) ,lkdebug ) |
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| 551 | zdistEst3 = 9999999.9 |
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| 552 | IF( lest )zdistEst3 = & |
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| 553 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(EstPoint) ,pointToCoordF(endingPoint) ,lkdebug ) |
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| 554 | zdistSouth3 = 9999999.9 |
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| 555 | IF( lsouth )zdistSouth3 = & |
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| 556 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(SouthPoint),pointToCoordF(endingPoint) ,lkdebug ) |
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| 557 | zdistNorth3 = 9999999.9 |
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| 558 | IF( lnorth )zdistNorth3 = & |
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| 559 | distance3(pointToCoordF(sec%listPoint(1)),pointToCoordF(NorthPoint),pointToCoordF(endingPoint) ,lkdebug ) |
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| 560 | |
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| 561 | zdistEst3 = zdistEst3 + (1-COUNT((/lest/)) )*9999999.9 |
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| 562 | zdistWest3 = zdistWest3 + (1-COUNT((/lwest/)) )*9999999.9 |
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| 563 | zdistNorth3 = zdistNorth3 + (1-COUNT((/lnorth/)))*9999999.9 |
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| 564 | zdistSouth3 = zdistSouth3 + (1-COUNT((/lsouth/)))*9999999.9 |
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| 565 | |
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| 566 | zdistnew = MIN(zdistEst3,zdistWest3,zdistnorth3,zdistSouth3) |
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| 567 | |
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| 568 | ELSE |
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| 569 | |
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| 570 | ! e.2 If no point is selected, select the point which is the closest to end-point |
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| 571 | !-------------------------------------------------------------------------------- |
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| 572 | l_oldmethod = .TRUE. |
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| 573 | |
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| 574 | !debug |
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| 575 | WRITE(cltmp,'(A30,i3.3)' )'SEARCH NEW POINT WITH OLD METHOD: ',jsec |
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| 576 | CALL write_debug(jsec,cltmp) |
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| 577 | |
---|
| 578 | ! on passe à l'ancienne methode: le point parmies les 4 pts (NSWE) qui se rapproche |
---|
| 579 | ! le + du dernier pt |
---|
| 580 | !----------------------------- |
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| 581 | !be carreful! we can't go backward. |
---|
| 582 | |
---|
| 583 | zdistNorth = zdistNorth2 ; zdistSouth = zdistSouth2 |
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| 584 | zdistEst = zdistEst2 ; zdistWest = zdistWest2 |
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| 585 | |
---|
| 586 | IF( prevPoint%I .EQ. NorthPoint%I .AND. prevPoint%J .EQ. NorthPoint%J) THEN |
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| 587 | zdistnew = MIN(zdistEst,zdistWest,zdistSouth) |
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| 588 | ELSE IF(prevPoint%I .EQ. SouthPoint%I .AND. prevPoint%J .EQ. SouthPoint%J) THEN |
---|
| 589 | zdistnew = MIN(zdistEst,zdistWest,zdistNorth) |
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| 590 | ELSE IF(prevPoint%I .EQ. WestPoint%I .AND. prevPoint%J .EQ. WestPoint%J ) THEN |
---|
| 591 | zdistnew = MIN(zdistEst,zdistNorth,zdistSouth) |
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| 592 | ELSE IF(prevPoint%I .EQ. EstPoint%I .AND. prevPoint%J .EQ. EstPoint%J ) THEN |
---|
| 593 | zdistnew = MIN(zdistWest,zdistNorth,zdistSouth) |
---|
| 594 | ELSE |
---|
| 595 | zdistnew = MIN(zdistEst,zdistWest,zdistNorth,zdistSouth) |
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| 596 | ENDIF |
---|
| 597 | |
---|
| 598 | ENDIF |
---|
| 599 | |
---|
| 600 | !debug |
---|
| 601 | WRITE(cltmp,'(A11, f8.3)')'zdistref = ',zdistref |
---|
| 602 | CALL write_debug(jsec,cltmp) |
---|
| 603 | WRITE(cltmp, 103 )'distance2 :',zdistEst2,zdistWest2,zdistNorth2,zdistSouth2 |
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| 604 | CALL write_debug(jsec,cltmp) |
---|
| 605 | WRITE(cltmp, 103 )'distance3 :',zdistEst3,zdistWest3,zdistNorth3,zdistSouth3 |
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| 606 | CALL write_debug(jsec,cltmp) |
---|
| 607 | WRITE(cltmp,'(A11, f8.3)')"zdistnew = ",zdistnew |
---|
| 608 | CALL write_debug(jsec,cltmp) |
---|
| 609 | |
---|
| 610 | 103 FORMAT (A12,"E",f12.3," W",f12.3," N",f12.3," S",f12.3) |
---|
| 611 | |
---|
| 612 | !f. save next point and direction of velocity. |
---|
| 613 | !--------------------------------------------- |
---|
| 614 | !nextPoint will be the one which is the closest to endingPoint. |
---|
| 615 | !sec%direction will be direction between current point and nextPoint: |
---|
| 616 | !It will be used to compute velocity through the segment [CurrentPoint,nextPoint}: |
---|
| 617 | ! |
---|
| 618 | !A:Current Point NorthPoint(I,J+1) Nextpoint=NorthPoint(I,J+1) => sec%direction=3 |
---|
| 619 | ! | Nextpoint=SouthPoint(I,J-1) => sec%direction=2 |
---|
| 620 | ! | Nextpoint=WestPoint(I-1,J) => sec%direction=0 |
---|
| 621 | ! |==>V(I,J+1) Nextpoint=EastPoint(I+1,J) => sec%direction=1 |
---|
| 622 | ! U(I,J) | U(I+1,J) |
---|
| 623 | ! ^ | ^ |
---|
| 624 | ! West_____|______A_______|_____EstPoint |
---|
| 625 | ! Point |(I,J) (I+1,J) |
---|
| 626 | ! (I-1,J) | |
---|
| 627 | ! |==>V(I,J) |
---|
| 628 | ! | |
---|
| 629 | ! SoutPoint(I,J-1) |
---|
| 630 | IF( l_oldmethod )THEN |
---|
| 631 | IF( zdistnew == zdistWest ) THEN |
---|
| 632 | sec%direction(jseg)=0 ; nextPoint = WestPoint |
---|
| 633 | ELSE IF( zdistnew == zdistEst ) THEN |
---|
| 634 | sec%direction(jseg)=1 ; nextPoint = EstPoint |
---|
| 635 | ELSE IF( zdistnew == zdistSouth )THEN |
---|
| 636 | sec%direction(jseg)=2 ; nextPoint = SouthPoint |
---|
| 637 | ELSE IF( zdistnew == zdistNorth )THEN |
---|
| 638 | sec%direction(jseg)=3 ; nextPoint= NorthPoint |
---|
| 639 | ENDIF |
---|
| 640 | ELSE |
---|
| 641 | IF( zdistnew == zdistWest3 ) THEN |
---|
| 642 | sec%direction(jseg)=0 ; nextPoint = WestPoint |
---|
| 643 | ELSE IF( zdistnew == zdistEst3 ) THEN |
---|
| 644 | sec%direction(jseg)=1 ; nextPoint = EstPoint |
---|
| 645 | ELSE IF( zdistnew == zdistSouth3 )THEN |
---|
| 646 | sec%direction(jseg)=2 ; nextPoint = SouthPoint |
---|
| 647 | ELSE IF( zdistnew == zdistNorth3 )THEN |
---|
| 648 | sec%direction(jseg)=3 ; nextPoint= NorthPoint |
---|
| 649 | ENDIF |
---|
| 650 | ENDIF |
---|
| 651 | WRITE(cltmp,'(A11, 2(i4.4,1X) )')'nextPoint = ', nextPoint |
---|
| 652 | CALL write_debug(jsec,cltmp) |
---|
| 653 | |
---|
| 654 | !f. Save nextPoint and go to nextPoint |
---|
| 655 | !------------------------------------- |
---|
| 656 | prevPoint = sec%listPoint(jseg) |
---|
| 657 | jseg = jseg+1 !increment of number of segments that form the section |
---|
| 658 | sec%listPoint(jseg) = nextPoint !Save next point |
---|
| 659 | |
---|
| 660 | ENDIF ! southP/northP/WestP/EstP == endingpoint ? |
---|
| 661 | |
---|
| 662 | ENDDO !End of loop on jseg |
---|
| 663 | sec%nb_point = jseg !Save the number of segments that form the section |
---|
| 664 | |
---|
| 665 | |
---|
| 666 | ELSE ! nb_inmesh == 0 |
---|
| 667 | DO jseg=1,nb_point_max |
---|
| 668 | sec%listPoint(:)=POINT_SECTION(0,0) |
---|
| 669 | ENDDO |
---|
| 670 | sec%direction(:)=0. |
---|
| 671 | sec%nb_point = 0 |
---|
| 672 | ENDIF |
---|
| 673 | |
---|
| 674 | !debug |
---|
| 675 | CALL write_debug(jsec,"-------------------------------------") |
---|
| 676 | CALL write_debug(jsec,"list of points in the grid : ") |
---|
| 677 | DO jseg=1,sec%nb_point |
---|
| 678 | ji=sec%listPoint(jseg)%I ; jj=sec%listPoint(jseg)%J |
---|
| 679 | WRITE(cltmp, '(i4.4,X,i4.4,X,i4.4,X,f8.3,X,f8.3)' )jseg,ji,jj,glamf(ji,jj),gphif(ji,jj) |
---|
| 680 | CALL write_debug(jsec,cltmp) |
---|
| 681 | ENDDO |
---|
| 682 | |
---|
| 683 | !test if we are one end-point |
---|
| 684 | IF( sec%listPoint(sec%nb_point)%I .NE. endingPoint%J .AND. sec%listPoint(sec%nb_point)%J .NE. endingPoint%J )THEN |
---|
| 685 | PRINT*,TRIM(sec%name)," NOT ARRIVED TO endingPoint FOR jsec = ",jsec |
---|
| 686 | ENDIF |
---|
| 687 | |
---|
| 688 | !now compute new slopeSection with ij-coordinates of first and last point |
---|
| 689 | IF ( sec%listPoint(sec%nb_point)%I .NE. sec%listPoint(1)%I ) THEN |
---|
| 690 | sec%slopeSection = ( sec%listPoint(sec%nb_point)%J - sec%listPoint(1)%J ) / & |
---|
| 691 | ( sec%listPoint(sec%nb_point)%I - sec%listPoint(1)%I ) |
---|
| 692 | ELSE |
---|
| 693 | sec%slopeSection = 10000._wp |
---|
| 694 | ENDIF |
---|
| 695 | |
---|
| 696 | END SUBROUTINE compsec |
---|
| 697 | |
---|
| 698 | END MODULE compute_sections |
---|