1 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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2 | ! |
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3 | ! this routine performs a remapping based on addresses and weights |
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4 | ! computed in a setup phase |
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5 | ! |
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6 | !----------------------------------------------------------------------- |
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7 | ! |
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8 | ! CVS:$Id: remap.f,v 1.5 2000/04/19 21:56:25 pwjones Exp $ |
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9 | ! |
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10 | ! Copyright (c) 1997, 1998 the Regents of the University of |
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11 | ! California. |
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12 | ! |
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13 | ! This software and ancillary information (herein called software) |
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14 | ! called SCRIP is made available under the terms described here. |
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15 | ! The software has been approved for release with associated |
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16 | ! LA-CC Number 98-45. |
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17 | ! |
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18 | ! Unless otherwise indicated, this software has been authored |
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19 | ! by an employee or employees of the University of California, |
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20 | ! operator of the Los Alamos National Laboratory under Contract |
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21 | ! No. W-7405-ENG-36 with the U.S. Department of Energy. The U.S. |
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22 | ! Government has rights to use, reproduce, and distribute this |
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23 | ! software. The public may copy and use this software without |
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24 | ! charge, provided that this Notice and any statement of authorship |
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25 | ! are reproduced on all copies. Neither the Government nor the |
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26 | ! University makes any warranty, express or implied, or assumes |
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27 | ! any liability or responsibility for the use of this software. |
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28 | ! |
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29 | ! If software is modified to produce derivative works, such modified |
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30 | ! software should be clearly marked, so as not to confuse it with |
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31 | ! the version available from Los Alamos National Laboratory. |
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32 | ! |
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33 | !*********************************************************************** |
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34 | |
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35 | module remap_mod |
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36 | |
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37 | !----------------------------------------------------------------------- |
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38 | ! |
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39 | ! this module contains the routines for performing the actual |
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40 | ! remappings |
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41 | ! |
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42 | !----------------------------------------------------------------------- |
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43 | |
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44 | use kinds_mod ! defines common data types |
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45 | use constants ! defines common constants |
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46 | |
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47 | implicit none |
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48 | |
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49 | !*********************************************************************** |
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50 | |
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51 | contains |
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52 | |
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53 | !*********************************************************************** |
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54 | |
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55 | subroutine remap(dst_array, map_wts, dst_add, src_add, |
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56 | & src_array, src_grad1, src_grad2, src_grad3) |
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57 | |
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58 | !----------------------------------------------------------------------- |
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59 | ! |
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60 | ! performs the remapping based on weights computed elsewhere |
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61 | ! |
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62 | !----------------------------------------------------------------------- |
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63 | |
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64 | !----------------------------------------------------------------------- |
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65 | ! |
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66 | ! input arrays |
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67 | ! |
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68 | !----------------------------------------------------------------------- |
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69 | |
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70 | integer (kind=int_kind), dimension(:), intent(in) :: |
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71 | & dst_add, ! destination address for each link |
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72 | & src_add ! source address for each link |
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73 | |
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74 | real (kind=dbl_kind), dimension(:,:), intent(in) :: |
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75 | & map_wts ! remapping weights for each link |
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76 | |
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77 | real (kind=dbl_kind), dimension(:), intent(in) :: |
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78 | & src_array ! array with source field to be remapped |
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79 | |
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80 | real (kind=dbl_kind), dimension(:), intent(in), optional :: |
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81 | & src_grad1 ! gradient arrays on source grid necessary for |
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82 | &, src_grad2 ! higher-order remappings |
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83 | &, src_grad3 |
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84 | |
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85 | !----------------------------------------------------------------------- |
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86 | ! |
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87 | ! output variables |
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88 | ! |
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89 | !----------------------------------------------------------------------- |
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90 | |
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91 | real (kind=dbl_kind), dimension(:), intent(inout) :: |
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92 | & dst_array ! array for remapped field on destination grid |
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93 | |
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94 | !----------------------------------------------------------------------- |
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95 | ! |
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96 | ! local variables |
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97 | ! |
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98 | !----------------------------------------------------------------------- |
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99 | |
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100 | integer (kind=int_kind) :: n, iorder |
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101 | |
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102 | !----------------------------------------------------------------------- |
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103 | ! |
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104 | ! check the order of the interpolation |
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105 | ! |
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106 | !----------------------------------------------------------------------- |
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107 | |
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108 | if (present(src_grad1)) then |
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109 | iorder = 2 |
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110 | else |
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111 | iorder = 1 |
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112 | endif |
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113 | |
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114 | !----------------------------------------------------------------------- |
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115 | ! |
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116 | ! first order remapping |
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117 | ! |
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118 | !----------------------------------------------------------------------- |
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119 | |
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120 | dst_array = zero |
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121 | |
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122 | select case (iorder) |
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123 | case(1) |
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124 | |
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125 | do n=1,size(dst_add) |
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126 | dst_array(dst_add(n)) = dst_array(dst_add(n)) + |
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127 | & src_array(src_add(n))*map_wts(1,n) |
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128 | end do |
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129 | |
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130 | !----------------------------------------------------------------------- |
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131 | ! |
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132 | ! second order remapping |
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133 | ! |
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134 | !----------------------------------------------------------------------- |
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135 | |
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136 | case(2) |
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137 | |
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138 | if (size(map_wts,DIM=1) == 3) then |
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139 | do n=1,size(dst_add) |
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140 | dst_array(dst_add(n)) = dst_array(dst_add(n)) + |
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141 | & src_array(src_add(n))*map_wts(1,n) + |
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142 | & src_grad1(src_add(n))*map_wts(2,n) + |
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143 | & src_grad2(src_add(n))*map_wts(3,n) |
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144 | end do |
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145 | else if (size(map_wts,DIM=1) == 4) then |
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146 | do n=1,size(dst_add) |
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147 | dst_array(dst_add(n)) = dst_array(dst_add(n)) + |
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148 | & src_array(src_add(n))*map_wts(1,n) + |
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149 | & src_grad1(src_add(n))*map_wts(2,n) + |
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150 | & src_grad2(src_add(n))*map_wts(3,n) + |
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151 | & src_grad3(src_add(n))*map_wts(4,n) |
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152 | end do |
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153 | endif |
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154 | |
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155 | end select |
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156 | |
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157 | !----------------------------------------------------------------------- |
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158 | |
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159 | end subroutine remap |
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160 | |
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161 | !*********************************************************************** |
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162 | |
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163 | end module remap_mod |
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164 | |
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165 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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