1 | ;+ |
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2 | ; @file_comments |
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3 | ; |
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4 | ; |
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5 | ; @categories |
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6 | ; |
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7 | ; @param FIELD |
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8 | ; |
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9 | ; @param RES |
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10 | ; |
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11 | ; @param GLAMAXE |
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12 | ; |
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13 | ; @param GPHIAXE |
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14 | ; |
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15 | ; @keyword ENDPOINTS |
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16 | ; |
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17 | ; @keyword BOXZOOM |
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18 | ; |
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19 | ; @keyword TYPE |
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20 | ; |
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21 | ; @keyword WDEPTH |
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22 | ; |
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23 | ; @keyword DIREC |
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24 | ; |
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25 | ; @keyword SHOWBUILD |
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26 | ; |
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27 | ; @keyword ONLYBOX |
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28 | ; |
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29 | ; @keyword _EXTRA |
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30 | ; Used to pass keywords |
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31 | ; |
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32 | ; @returns |
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33 | ; |
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34 | ; @uses |
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35 | ; <pro>common</pro> |
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36 | ; |
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37 | ; @restrictions |
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38 | ; |
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39 | ; @examples |
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40 | ; |
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41 | ; @history |
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42 | ; Sebastien Masson (smasson\@lodyc.jussieu.fr) |
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43 | ; |
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44 | ; @version |
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45 | ; $Id$ |
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46 | ; |
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47 | ;- |
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48 | PRO section, field, res, glamaxe, gphiaxe, ENDPOINTS=endpoints $ |
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49 | , BOXZOOM=boxzoom, TYPE=type, WDEPTH=wdepth $ |
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50 | , DIREC=direc, SHOWBUILD=showbuild, ONLYBOX=onlybox $ |
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51 | , _EXTRA=ex |
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52 | ; |
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53 | compile_opt idl2, strictarrsubs |
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54 | ; |
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55 | @cm_4mesh |
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56 | @cm_4data |
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57 | @cm_4cal |
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58 | IF NOT keyword_set(key_forgetold) THEN BEGIN |
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59 | @updatenew |
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60 | @updatekwd |
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61 | ENDIF |
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62 | ;-------------------------------------------------------------- |
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63 | ;--------------------- |
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64 | ;--------------------- |
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65 | ; definition of boxzoom in function of endpoints, then redefinition of the domain |
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66 | boxzoom2d = [min([endpoints[0], endpoints[2]], max = ma02), ma02 $ |
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67 | , min([endpoints[1], endpoints[3]], max = ma13), ma13] |
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68 | ; |
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69 | minprof = 0. |
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70 | profdefault = 200. |
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71 | if n_elements(type) EQ 0 then type = 'nothing' |
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72 | Case N_Elements(Boxzoom) OF |
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73 | 0:localbox = [boxzoom2d, minprof, profdefault] |
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74 | 1:localbox = [boxzoom2d, minprof, boxzoom[0]] |
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75 | 2:localbox = [boxzoom2d, boxzoom] |
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76 | 4:if strpos(type, 'z') NE -1 THEN $ |
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77 | localbox = [boxzoom2d, minprof, profdefault] ELSE localbox = boxzoom2d |
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78 | 5:localbox = [boxzoom2d, minprof, boxzoom[4]] |
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79 | 6:localbox = [boxzoom2d, boxzoom[4:5]] |
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80 | Else:BEGIN |
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81 | ras = report('Bad definition of the box') |
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82 | stop |
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83 | END |
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84 | ENDCASE |
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85 | nelbox = n_elements(localbox) |
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86 | ; |
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87 | if keyword_set(wdepth) then grillechoice = [vargrid, 'W'] $ |
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88 | ELSE grillechoice = vargrid |
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89 | domdef, localbox, GRIDTYPE = grillechoice, /findalways, _extra = ex |
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90 | grille, -1, -1, -1, -1, nx, ny |
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91 | ; if less than 10 points where found, we apply domdef over the whole domain |
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92 | ; -> problem... why 10 points as a test value??? |
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93 | ; how can we find a good test value? |
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94 | IF nx * ny LE 10 THEN domdef, GRIDTYPE = grillechoice, _extra = ex |
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95 | ; We redefine lon1, ... in case findalways has been used in domdef |
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96 | lon1 = min([endpoints[0], endpoints[2]], max = lon2) |
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97 | lat1 = min([endpoints[1], endpoints[3]], max = lat2) |
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98 | ; we extend the box along the z axis -> i that way the plot will be drawn |
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99 | ; until its bottom part. |
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100 | if strpos(type, 'z') NE -1 THEN BEGIN |
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101 | ; We keep yranges (axis z) before changing the boxzoom. |
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102 | !y.range = [localbox[nelbox-1], localbox[nelbox-2]] |
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103 | if vargrid EQ 'W' OR keyword_set(wdepth) then BEGIN |
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104 | firstzw = 0 > (firstzw-1) |
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105 | lastzw = (lastzw+1) < (jpk-1) |
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106 | nzw = lastzw - firstzw + 1 |
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107 | ENDIF ELSE BEGIN |
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108 | firstzt = 0 > (firstzt-1) |
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109 | lastzt = (lastzt+1) < (jpk-1) |
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110 | nzt = lastzt - firstzt + 1 |
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111 | ENDELSE |
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112 | IF NOT keyword_set(key_forgetold) THEN BEGIN |
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113 | @updateold |
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114 | ENDIF |
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115 | ENDIF |
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116 | !y.range = [localbox[nelbox-1], localbox[nelbox-2]] |
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117 | ; We recuperate the grid on the boxzoom. |
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118 | ; |
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119 | IF NOT keyword_set(onlybox) THEN saveboxparam, 'boxparam4section.dat' |
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120 | grille, -1, -1, -1, -1, nx, ny, nz $ |
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121 | , firstx, firsty, firstz, lastx, lasty, lastz |
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122 | ; the extend the box in the x and y direction in order to maximise |
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123 | ; the number of triangles used to build the section |
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124 | firstx = 0 > (firstx - 1) |
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125 | lastx = (lastx + 1) < (jpi -1) |
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126 | firsty = 0 > (firsty - 1) |
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127 | lasty = (lasty + 1) < (jpj -1) |
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128 | |
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129 | domdef, firstx, lastx, firsty, lasty, firstz, lastz $ |
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130 | , /index, gridtype = vargrid |
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131 | |
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132 | IF keyword_set(onlybox) THEN return |
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133 | ; |
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134 | grille, mask, glam, gphi, gdep, nx, ny, nz $ |
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135 | , firstx, firsty, firstz, lastx, lasty, lastz |
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136 | |
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137 | ;--------------------- |
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138 | ; We define the triangulation which will allows us to determinate the section. |
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139 | ; We recalculate it because it must be defined on the Earth and on oceans. |
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140 | ; Following the direction of the section -rather longitude or rather latitude- |
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141 | ; we define the way to triangulate. |
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142 | if strpos(type, 'x') NE -1 then BEGIN |
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143 | downward = (lindgen(nx, ny))[0:nx-2, 0:ny-2] |
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144 | tri = definetri(nx, ny, (downward)[*]) |
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145 | ENDIF ELSE tri = definetri(nx, ny) |
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146 | ; If we have an irregular grid that is periodic, then it is possible that |
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147 | ; some of the triangle have a very large size (neighborg points on the |
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148 | ; sphere but far away when doing the projection) and should not be |
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149 | ; taken into account.. |
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150 | IF keyword_set(key_irregular) AND keyword_set(key_periodic) THEN BEGIN |
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151 | glamtri = glam[tri] |
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152 | glamtri = abs(glamtri - shift(glamtri, 1, 0)) |
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153 | good = temporary(glamtri) LT (10.*max(glam)/nx) |
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154 | good = where(total(temporary(good), 1) EQ 3) |
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155 | tri = (temporary(tri))[*, temporary(good)] |
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156 | ENDIF |
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157 | ;--------------------- |
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158 | ; Equation of the line on which we do the section. |
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159 | ;--------------------- |
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160 | abc = linearequation(endpoints[0:1], endpoints[2:3]) |
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161 | glamtri = glam[tri] |
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162 | gphitri = gphi[tri] |
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163 | ; Which points of the triangulation are above and below the line? |
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164 | if abc[1] NE 0 THEN $ |
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165 | test = temporary(gphitri) GE (-abc[0]/abc[1]*temporary(glamtri)-abc[2]/abc[1]) $ |
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166 | ELSE test = temporary(glamtri) GE (-abc[1]/abc[0]*temporary(gphitri)-abc[2]/abc[0]) |
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167 | |
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168 | zero123 = total(test, 1) |
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169 | ; to keep: triangles of the triangulation which are over the line. |
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170 | tokeep1 = where(zero123 EQ 1) |
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171 | tokeep2 = where(temporary(zero123) EQ 2) |
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172 | tokeep = [tokeep1, tokeep2] |
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173 | |
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174 | test = test[*, tokeep] |
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175 | tri = tri[*, tokeep] |
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176 | ; Which summit of the triangle is alone in a side of the line? |
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177 | single1 = where(test[*, 0:n_elements(tokeep1)-1] EQ 1) |
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178 | single1 = single1-(single1/3)*3 |
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179 | single2 = where(test[*, n_elements(tokeep1):n_elements(tokeep)-1] EQ 0) |
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180 | single2 = single2-(single2/3)*3 |
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181 | |
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182 | undefine, tokeep |
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183 | undefine, tokeep1 |
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184 | undefine, tokeep2 |
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185 | undefine, test |
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186 | |
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187 | single = [temporary(single1), temporary(single2)] |
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188 | ; points1 the point (of the triangle) alone in a side of the line. |
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189 | ; point2 the other point of the triangle in the other side of the line. |
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190 | point1 = [single, single] |
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191 | point2 = [single EQ 0, 1 + (single LE 1)] |
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192 | |
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193 | undefine, single |
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194 | |
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195 | ntri = (size(tri))[2] |
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196 | index = [lindgen(ntri), lindgen(ntri)] |
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197 | |
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198 | points1 = tri[point1, index] |
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199 | points2 = tri[point2, temporary(index)] |
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200 | ; points : complex containing couples of points in a side and the other |
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201 | ; side of the line. We have to delete duplicates. |
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202 | points = dcomplex(points1, points2) |
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203 | points = points[uniq(points, sort(points))] |
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204 | symetrique = dcomplex(imaginary(points), double(points)) |
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205 | points = points[where(points-shift(temporary(symetrique), 1) NE 0)] |
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206 | ; points1 coordinates of the point of the triangle which is alone in a side of the line. |
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207 | ; point2 coordinates of the other point of the triangle in the other side of the line. |
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208 | points1 = complex(glam[ double(points)], gphi[ double(points)]) |
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209 | points2 = complex(glam[imaginary(points)], gphi[imaginary(points)]) |
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210 | ; droites equations of line whose we look for the intersection wit the section. |
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211 | droites = linearequation(points1, points2) |
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212 | inter = lineintersection(droites, abc#replicate(1, n_elements(points1) ) ) |
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213 | |
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214 | ; Geographic coordinates of points we look for on the section. |
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215 | glamaxe = float(inter) |
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216 | gphiaxe = imaginary(inter) |
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217 | ; We arrange them in the growing order between boundaries of the section. |
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218 | if strpos(type, 'x') NE -1 then BEGIN |
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219 | sort = sort(glamaxe) |
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220 | glamaxe = glamaxe[sort] |
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221 | inbox = where(glamaxe GE lon1 AND glamaxe LE lon2) |
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222 | glamaxe = glamaxe[inbox] |
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223 | sort = sort[inbox] |
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224 | gphiaxe = gphiaxe[sort] |
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225 | ENDIF ELSE BEGIN |
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226 | sort = sort(gphiaxe) |
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227 | gphiaxe = gphiaxe[sort] |
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228 | inbox = where(gphiaxe GE lat1 AND gphiaxe LE lat2) |
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229 | gphiaxe = gphiaxe[inbox] |
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230 | sort = sort[inbox] |
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231 | glamaxe = glamaxe[sort] |
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232 | ENDELSE |
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233 | points = points[sort] |
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234 | points1 = points1[sort] |
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235 | points2 = points2[sort] |
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236 | inter = inter[sort] |
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237 | poids = abs(points2-inter)/abs(points2-points1) |
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238 | |
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239 | ;--------------------- |
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240 | array = litchamp(field) |
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241 | array = fitintobox(array) |
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242 | if array[0] EQ -1 THEN BEGIN |
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243 | res = -1 |
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244 | return |
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245 | ENDIF |
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246 | if n_elements(valmask) EQ 0 THEN valmask = 1e20 |
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247 | taille = size(array) |
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248 | if jpt GT 1 AND taille[0] GE 3 AND strpos(type, 't') EQ -1 then BEGIN |
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249 | direc = 't' |
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250 | array = grossemoyenne(array, 't') |
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251 | taille = size(array) |
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252 | jpt = 1 |
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253 | ENDIF |
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254 | case 1 of |
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255 | ;---------------------------------------------------------------------------- |
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256 | ;xy |
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257 | ;---------------------------------------------------------------------------- |
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258 | taille[0] EQ 2:BEGIN |
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259 | value1 = array[double(points)] |
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260 | terre = where(value1 GT valmask/10) |
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261 | if terre[0] NE -1 then value1[terre] = !values.f_nan |
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262 | value2 = array[imaginary(points)] |
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263 | terre = where(value2 GT valmask/10) |
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264 | if terre[0] NE -1 then value2[terre] = !values.f_nan |
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265 | res = poids*value1+(1-poids)*value2 |
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266 | END |
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267 | ;---------------------------------------------------------------------------- |
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268 | ;xyz |
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269 | ;---------------------------------------------------------------------------- |
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270 | taille[0] EQ 3 AND jpt EQ 1:BEGIN |
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271 | npoints = n_elements(points) |
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272 | index = double(points)#replicate(1, nz)+replicate(nx*ny, npoints)#lindgen(nz) |
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273 | value1 = array[index] |
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274 | terre = where(value1 GT valmask/10) |
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275 | if terre[0] NE -1 then value1[terre] = !values.f_nan |
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276 | index = imaginary(points)#replicate(1, nz)+replicate(nx*ny, npoints)#lindgen(nz) |
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277 | value2 = array[index] |
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278 | terre = where(value2 GT valmask/10) |
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279 | if terre[0] NE -1 then value2[terre] = !values.f_nan |
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280 | poids = poids#replicate(1, nz) |
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281 | res = poids*value1+(1-poids)*value2 |
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282 | ; average following z ? |
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283 | if strpos(type, 'z') EQ -1 then begin |
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284 | nan = where(finite(res) EQ 0) |
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285 | if vargrid EQ 'W' then e3 = e3w[firstzw:lastzw] ELSE e3 = e3t[firstzt:lastzt] |
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286 | weight = replicate(1, npoints)#e3 |
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287 | if nan[0] NE -1 then weight[nan] = !values.f_nan |
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288 | totalweight = total(weight, 2, /nan) |
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289 | zero = where(totalweight EQ 0) |
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290 | if zero[0] NE -1 then totalweight[zero] = !values.f_nan |
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291 | res = total(res*weight, 2, /nan)/totalweight |
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292 | direc = 'z'+string(byte(testvar(var = toto))) |
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293 | endif |
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294 | END |
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295 | ;---------------------------------------------------------------------------- |
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296 | ;xyt |
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297 | ;---------------------------------------------------------------------------- |
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298 | taille[0] EQ 3 AND jpt NE 1:BEGIN |
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299 | npoints = n_elements(points) |
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300 | index = double(points)#replicate(1, jpt)+replicate(nx*ny, npoints)#lindgen(jpt) |
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301 | value1 = array[index] |
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302 | terre = where(value1 GT valmask/10) |
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303 | if terre[0] NE -1 then value1[terre] = !values.f_nan |
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304 | index = imaginary(points)#replicate(1, jpt)+replicate(nx*ny, npoints)#lindgen(jpt) |
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305 | value2 = array[index] |
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306 | terre = where(value2 GT valmask/10) |
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307 | if terre[0] NE -1 then value2[terre] = !values.f_nan |
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308 | poids = poids#replicate(1, jpt) |
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309 | res = poids*value1+(1-poids)*value2 |
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310 | END |
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311 | ;---------------------------------------------------------------------------- |
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312 | ;xyzt |
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313 | ;---------------------------------------------------------------------------- |
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314 | taille[0] EQ 4:BEGIN |
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315 | npoints = n_elements(points) |
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316 | index = double(points)#replicate(1, nz*jpt)+replicate(nx*ny, npoints)#lindgen(nz*jpt) |
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317 | index = reform(index, npoints, nz, jpt, /over) |
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318 | value1 = array[index] |
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319 | terre = where(value1 GT valmask/10) |
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320 | if terre[0] NE -1 then value1[terre] = !values.f_nan |
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321 | index = imaginary(points)#replicate(1, nz*jpt)+replicate(nx*ny, npoints)#lindgen(nz*jpt) |
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322 | index = reform(index, npoints, nz, jpt, /over) |
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323 | value2 = array[index] |
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324 | terre = where(value2 GT valmask/10) |
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325 | if terre[0] NE -1 then value2[terre] = !values.f_nan |
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326 | poids = poids#replicate(1, nz*jpt) |
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327 | poids = reform(poids, npoints, nz, jpt, /over) |
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328 | res = poids*value1+(1-poids)*value2 |
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329 | ; average following z ? |
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330 | if strpos(type, 'z') EQ -1 then begin |
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331 | nan = where(finite(res) EQ 0) |
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332 | if vargrid EQ 'W' then e3 = e3w[firstzw:lastzw] ELSE e3 = e3t[firstzt:lastzt] |
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333 | weight = replicate(1, npoints)#e3 |
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334 | weight = weight[*]#replicate(1, jpt) |
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335 | weight = reform(weight, npoints, nz, jpt, /over) |
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336 | if nan[0] NE -1 then weight[nan] = !values.f_nan |
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337 | totalweight = total(weight, 2, /nan) |
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338 | zero = where(totalweight EQ 0) |
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339 | if zero[0] NE -1 then totalweight[zero] = !values.f_nan |
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340 | res = total(res*weight, 2, /nan)/totalweight |
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341 | direc = 'z'+string(byte(testvar(var = toto))) |
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342 | endif |
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343 | END |
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344 | endcase |
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345 | ;--------------------- |
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346 | |
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347 | terre = where(finite(res) EQ 0) |
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348 | if terre[0] NE -1 then res[terre] = valmask |
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349 | |
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350 | if n_elements(showbuild) then BEGIN |
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351 | winsave = !window |
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352 | psave = !p |
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353 | xsave = !x |
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354 | ysave = !y |
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355 | plt, findgen(nx, ny), /nodata, /nofill, /rempli, title = '', subtitle = '' $ |
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356 | , coast_thick = 2, window = showbuild |
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357 | !p.title = '' |
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358 | !p.subtitle = '' |
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359 | |
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360 | plots, [endpoints[0], endpoints[2]], [endpoints[1], endpoints[3]], color = 50 |
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361 | plots, [endpoints[0], endpoints[2]], [endpoints[1], endpoints[3]], color = 50, psym = 2, thick = 2 |
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362 | |
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363 | FOR i = 0, n_elements(points1)-1 DO $ |
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364 | plots, [float(points1[i]), float(points2[i])] $ |
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365 | , [imaginary(points1[i]), imaginary(points2[i])], color = 150 |
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366 | |
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367 | plots, float(points1), imaginary(points1), color = 150, psym = 1 |
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368 | plots, float(points2), imaginary(points2), color = 150, psym = 1 |
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369 | plots, float(inter), imaginary(inter), color = 250, psym = 1 |
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370 | |
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371 | ; ?? bug ?? IF terre[0] NE -1 THEN plots, float(terre[inter]), imaginary(terre[inter]), color = 0, psym = 1 |
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372 | |
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373 | ; dummy = '' |
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374 | ; read, dummy, prompt = 'press return to continue' |
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375 | IF !d.name EQ 'PS' THEN erase ELSE wset, winsave |
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376 | !p = psave |
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377 | !x = xsave |
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378 | !y = ysave |
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379 | ENDIF |
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380 | |
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381 | restoreboxparam, 'boxparam4section.dat' |
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382 | |
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383 | ;--------------------- |
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384 | return |
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385 | end |
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