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1 function nrbexport (varargin) |
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2 |
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3 % |
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4 % NRBEXPORT: export NURBS geometries to a format compatible with the one used in GeoPDEs (version 0.6). |
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5 % |
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6 % Calling Sequence: |
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7 % |
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8 % nrbexport (nurbs, filename); |
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9 % nrbexport (nurbs, interfaces, boundaries, filename); |
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10 % nrbexport (nurbs, interfaces, boundaries, subdomains, filename); |
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11 % |
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12 % INPUT: |
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13 % |
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14 % nurbs : NURBS curve, surface or volume, see nrbmak. |
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15 % interfaces: interface information for GeoPDEs (see nrbmultipatch) |
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16 % boundaries: boundary information for GeoPDEs (see nrbmultipatch) |
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17 % filename : name of the output file. |
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18 % |
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19 % |
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20 % Description: |
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21 % |
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22 % The data of the nurbs structure is written in the file, in a format |
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23 % that can be read by GeoPDEs. |
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24 % |
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25 % Copyright (C) 2011, 2014, 2015 Rafael Vazquez |
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26 % |
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27 % This program is free software: you can redistribute it and/or modify |
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28 % it under the terms of the GNU General Public License as published by |
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29 % the Free Software Foundation, either version 3 of the License, or |
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30 % (at your option) any later version. |
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31 |
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32 % This program is distributed in the hope that it will be useful, |
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33 % but WITHOUT ANY WARRANTY; without even the implied warranty of |
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34 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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35 % GNU General Public License for more details. |
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36 % |
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37 % You should have received a copy of the GNU General Public License |
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38 % along with this program. If not, see <http://www.gnu.org/licenses/>. |
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39 |
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40 if (nargin == 2) |
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41 nurbs = varargin{1}; |
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42 filename = varargin{2}; |
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43 if (numel (nurbs) > 1) |
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44 warning ('Automatically creating the interface information with nrbmultipatch') |
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45 [interfaces, boundaries] = nrbmultipatch (nurbs); |
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46 subdomains = []; |
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47 else |
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48 interfaces = []; boundaries = []; subdomains = []; |
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49 end |
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50 elseif (nargin == 4) |
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51 nurbs = varargin{1}; |
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52 interfaces = varargin{2}; |
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53 boundaries = varargin{3}; |
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54 filename = varargin{4}; |
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55 subdomains = []; |
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56 elseif (nargin == 5) |
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57 nurbs = varargin{1}; |
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58 interfaces = varargin{2}; |
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59 boundaries = varargin{3}; |
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60 subdomains = varargin{4}; |
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61 filename = varargin{5}; |
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62 else |
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63 error ('nrbexport: wrong number of input arguments') |
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64 end |
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65 |
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66 fid = fopen (filename, 'w'); |
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67 if (fid < 0) |
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68 error ('nrbexport: cannot open file %s', filename); |
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69 end |
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70 |
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71 ndim = numel (nurbs(1).order); |
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72 npatch = numel (nurbs); |
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73 rdim = 1; |
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74 for iptc = 1:npatch |
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75 if (any (abs(nurbs(iptc).coefs(3,:)) > 1e-12)) |
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76 rdim = 3; |
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77 break |
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78 elseif (any (abs(nurbs(iptc).coefs(2,:)) > 1e-12)) |
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79 rdim = 2; |
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80 end |
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81 end |
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82 |
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83 fprintf (fid, '%s\n', '# nurbs mesh v.1.0'); |
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84 fprintf (fid, '%s\n', '#'); |
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85 fprintf (fid, '%s\n', ['# ' date]); |
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86 fprintf (fid, '%s\n', '#'); |
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87 |
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88 fprintf (fid, '%2i', ndim, rdim, npatch, numel(interfaces), numel(subdomains)); |
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89 fprintf (fid, '\n'); |
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90 for iptc = 1:npatch |
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91 fprintf (fid, '%s %i \n', 'PATCH', iptc); |
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92 fprintf (fid, '%4i', nurbs(iptc).order-1); |
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93 fprintf (fid, '\n'); |
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94 fprintf (fid, '%4i', nurbs(iptc).number); |
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95 fprintf (fid, '\n'); |
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96 for ii = 1:ndim |
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97 fprintf (fid, '%1.7f ', nurbs(iptc).knots{ii}); |
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98 fprintf (fid, '\n'); |
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99 end |
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100 |
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101 for ii = 1:rdim |
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102 fprintf (fid, '%1.15f ', nurbs(iptc).coefs(ii,:,:)); |
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103 fprintf (fid, '\n'); |
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104 end |
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105 fprintf (fid, '%1.15f ', nurbs(iptc).coefs(4,:,:)); |
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106 fprintf (fid, '\n'); |
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107 end |
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108 |
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109 for intrfc = 1:numel(interfaces) |
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110 if (isfield (interfaces, 'ref')) |
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111 fprintf (fid, '%s \n', interfaces(intrfc).ref); |
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112 else |
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113 fprintf (fid, '%s %i \n', 'INTERFACE', intrfc); |
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114 end |
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115 fprintf (fid, '%i %i \n', interfaces(intrfc).patch1, interfaces(intrfc).side1); |
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116 fprintf (fid, '%i %i \n', interfaces(intrfc).patch2, interfaces(intrfc).side2); |
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117 if (ndim == 2) |
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118 fprintf (fid, '%i \n', interfaces(intrfc).ornt); |
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119 elseif (ndim == 3) |
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120 fprintf (fid, '%i %i %i \n', interfaces(intrfc).flag, interfaces(intrfc).ornt1, interfaces(intrfc).ornt2); |
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121 end |
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122 end |
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123 |
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124 for isubd = 1:numel(subdomains) |
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125 % The subdomain part should be fixed |
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126 fprintf (fid, '%s \n', subdomains(isubd).name); |
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127 fprintf (fid, '%i ', subdomains(isubd).patches); |
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128 fprintf (fid, '\n'); |
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129 end |
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130 |
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131 |
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132 for ibnd = 1:numel (boundaries) |
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133 if (isfield (boundaries, 'name')) |
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134 fprintf (fid, '%s \n', boundaries(ibnd).name); |
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135 else |
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136 fprintf (fid, '%s %i \n', 'BOUNDARY', ibnd); |
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137 end |
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138 fprintf (fid, '%i \n', boundaries(ibnd).nsides); |
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139 for ii = 1:boundaries(ibnd).nsides |
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140 fprintf (fid, '%i %i \n', boundaries(ibnd).patches(ii), boundaries(ibnd).faces(ii)); |
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141 end |
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142 end |
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143 |
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144 fclose (fid); |
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145 end |
