source: issm/trunk/src/m/model/modelextract.m@ 9436

Last change on this file since 9436 was 9436, checked in by Mathieu Morlighem, 14 years ago

Fixed some bad fields

File size: 7.7 KB
Line 
1function md2=modelextract(md1,area)
2%modelextract - extract a model according to an Argus contour or flag list
3%
4% This routine extracts a submodel from a bigger model with respect to a given contour
5% md must be followed by the corresponding exp file or flags list
6% It can either be a domain file (argus type, .exp extension), or an array of element flags.
7% If user wants every element outside the domain to be
8% modelextract2d, add '~' to the name of the domain file (ex: '~Pattyn.exp');
9% an empty string '' will be considered as an empty domain
10% a string 'all' will be considered as the entire domain
11% add an argument 0 if you do not want the elements to be checked (faster)
12%
13% Usage:
14% md2=modelextract(md1,area);
15%
16% Examples:
17% md2=modelextract(md,'Domain.exp');
18% md2=modelextract(md,md.elementoniceshelf);
19%
20% See also: EXTRUDE, COLLAPSE
21
22%some checks
23if ((nargin~=2) | (nargout~=1)),
24 help modelextract
25 error('modelextract error message: bad usage');
26end
27
28%get check option
29if (nargin==3 & varargin{1}==0),
30 checkoutline=0;
31else
32 checkoutline=1;
33end
34
35%first
36flag_elem=FlagElements(md1,area);
37
38%kick out all elements with 3 dirichlets
39spc_elem=find(~flag_elem);
40spc_node=sort(unique(md1.elements(spc_elem,:)));
41flag=ones(md1.numberofnodes,1);
42flag(spc_node)=0;
43pos=find(sum(flag(md1.elements),2)==0);
44flag_elem(pos)=0;
45
46%extracted elements and nodes lists
47pos_elem=find(flag_elem);
48pos_node=sort(unique(md1.elements(pos_elem,:)));
49
50%keep track of some fields
51numberofnodes1=md1.numberofnodes;
52numberofelements1=md1.numberofelements;
53numberofnodes2=length(pos_node);
54numberofelements2=length(pos_elem);
55flag_node=zeros(numberofnodes1,1);
56flag_node(pos_node)=1;
57
58%Create Pelem and Pnode (transform old nodes in new nodes and same thing for the elements)
59Pelem=zeros(numberofelements1,1);
60Pelem(pos_elem)=[1:numberofelements2]';
61Pnode=zeros(numberofnodes1,1);
62Pnode(pos_node)=[1:numberofnodes2]';
63
64%renumber the elements (some node won't exist anymore)
65elements_1=md1.elements;
66elements_2=elements_1(pos_elem,:);
67elements_2(:,1)=Pnode(elements_2(:,1));
68elements_2(:,2)=Pnode(elements_2(:,2));
69elements_2(:,3)=Pnode(elements_2(:,3));
70if md1.dim==3,
71 elements_2(:,4)=Pnode(elements_2(:,4));
72 elements_2(:,5)=Pnode(elements_2(:,5));
73 elements_2(:,6)=Pnode(elements_2(:,6));
74end
75
76%OK, now create the new model !
77
78 %take every fields from model
79 md2=md1;
80
81 %automatically modify fields
82
83 %loop over model fields
84 model_fields=fields(md1);
85 for i=1:length(model_fields),
86
87 %get field
88 field=md1.(model_fields{i});
89 fieldsize=size(field);
90
91 %size = number of nodes * n
92 if fieldsize(1)==numberofnodes1
93 md2.(model_fields{i})=field(pos_node,:);
94
95 %size = number of elements * n
96 elseif fieldsize(1)==numberofelements1
97 md2.(model_fields{i})=field(pos_elem,:);
98 end
99 end
100
101 %modify some specific fields
102
103 %Mesh
104 md2.numberofelements=numberofelements2;
105 md2.numberofnodes=numberofnodes2;
106 md2.elements=elements_2;
107
108 %uppernodes lowernodes
109 if md1.dim==3
110 md2.uppernodes=md1.uppernodes(pos_node);
111 pos=find(~isnan(md2.uppernodes));
112 md2.uppernodes(pos)=Pnode(md2.uppernodes(pos));
113
114 md2.lowernodes=md1.lowernodes(pos_node);
115 pos=find(~isnan(md2.lowernodes));
116 md2.lowernodes(pos)=Pnode(md2.lowernodes(pos));
117
118 md2.upperelements=md1.upperelements(pos_elem);
119 pos=find(~isnan(md2.upperelements));
120 md2.upperelements(pos)=Pelem(md2.upperelements(pos));
121
122 md2.lowerelements=md1.lowerelements(pos_elem);
123 pos=find(~isnan(md2.lowerelements));
124 md2.lowerelements(pos)=Pelem(md2.lowerelements(pos));
125 end
126
127 %Initial 2d mesh
128 if md1.dim==3
129 flag_elem_2d=flag_elem(1:md1.numberofelements2d);
130 pos_elem_2d=find(flag_elem_2d);
131 flag_node_2d=flag_node(1:md1.numberofnodes2d);
132 pos_node_2d=find(flag_node_2d);
133
134 md2.numberofelements2d=length(pos_elem_2d);
135 md2.numberofnodes2d=length(pos_node_2d);
136 md2.elements2d=md1.elements2d(pos_elem_2d,:);
137 md2.elements2d(:,1)=Pnode(md2.elements2d(:,1));
138 md2.elements2d(:,2)=Pnode(md2.elements2d(:,2));
139 md2.elements2d(:,3)=Pnode(md2.elements2d(:,3));
140
141 if ~isnan(md2.elements_type2d), md2.elements_type2d=md1.elements_type2d(pos_elem_2d); end;
142 md2.x2d=md1.x(pos_node_2d);
143 md2.y2d=md1.y(pos_node_2d);
144 md2.z2d=md1.z(pos_node_2d);
145 end
146
147 %Edges
148 if size(md2.edges,2)>1, %do not use ~isnan because there are some NaNs...
149 %renumber first two columns
150 pos=find(~isnan(md2.edges(:,4)));
151 md2.edges(: ,1)=Pnode(md2.edges(:,1));
152 md2.edges(: ,2)=Pnode(md2.edges(:,2));
153 md2.edges(: ,3)=Pelem(md2.edges(:,3));
154 md2.edges(pos,4)=Pelem(md2.edges(pos,4));
155 %remove edges when the 2 vertices are not in the domain.
156 md2.edges=md2.edges(find(md2.edges(:,1) & md2.edges(:,2)),:);
157 %Replace all zeros by NaN in the last two columns;
158 pos=find(md2.edges(:,3)==0);
159 md2.edges(pos,3)=NaN;
160 pos=find(md2.edges(:,4)==0);
161 md2.edges(pos,4)=NaN;
162 %Invert NaN of the third column with last column (Also invert first two columns!!)
163 pos=find(isnan(md2.edges(:,3)));
164 md2.edges(pos,3)=md2.edges(pos,4);
165 md2.edges(pos,4)=NaN;
166 values=md2.edges(pos,2);
167 md2.edges(pos,2)=md2.edges(pos,1);
168 md2.edges(pos,1)=values;
169 %Finally remove edges that do not belong to any element
170 pos=find(isnan(md2.edges(:,3)) & isnan(md2.edges(:,4)));
171 md2.edges(pos,:)=[];
172 end
173
174 %Penalties
175 if ~isnan(md2.penalties),
176 for i=1:size(md1.penalties,1);
177 md2.penalties(i,:)=Pnode(md1.penalties(i,:));
178 end
179 md2.penalties=md2.penalties(find(md2.penalties(:,1)),:);
180 end
181
182 %recreate segments
183 if md1.dim==2
184 md2.nodeconnectivity=NodeConnectivity(md2.elements,md2.numberofnodes);
185 md2.elementconnectivity=ElementConnectivity(md2.elements,md2.nodeconnectivity);
186 md2.segments=contourenvelope(md2);
187 md2.nodeonboundary=zeros(numberofnodes2,1); md2.nodeonboundary(md2.segments(:,1:2))=1;
188 end
189
190 %Boundary conditions: Dirichlets on new boundary
191 %Catch the elements that have not been extracted
192 orphans_elem=find(~flag_elem);
193 orphans_node=unique(md1.elements(orphans_elem,:))';
194 %Figure out which node are on the boundary between md2 and md1
195 nodestoflag1=intersect(orphans_node,pos_node);
196 nodestoflag2=Pnode(nodestoflag1);
197 if numel(md1.spcvx)>1 & numel(md1.spcvy)>2 & numel(md1.spcvz)>2,
198 if numel(md1.vx_obs)>1 & numel(md1.vy_obs)>1
199 md2.spcvx(nodestoflag2)=md2.vx_obs(nodestoflag2);
200 md2.spcvy(nodestoflag2)=md2.vy_obs(nodestoflag2);
201 else
202 md2.spcvx(nodestoflag2)=NaN;
203 md2.spcvy(nodestoflag2)=NaN;
204 disp(' ')
205 disp('!! modelextract warning: spc values should be checked !!')
206 disp(' ')
207 end
208 %put 0 for vz
209 md2.spcvz(nodestoflag2)=0;
210 end
211 if ~isnan(md1.spctemperature),
212 md2.spctemperature(nodestoflag2,1)=1;
213 end
214
215 %Diagnostic
216 if ~isnan(md2.pressureload)
217 md2.pressureload(:,1)=Pnode(md1.pressureload(:,1));
218 md2.pressureload(:,2)=Pnode(md1.pressureload(:,2));
219 md2.pressureload(:,end-1)=Pelem(md1.pressureload(:,end-1));
220 if md1.dim==3
221 md2.pressureload(:,3)=Pnode(md1.pressureload(:,3));
222 md2.pressureload(:,4)=Pnode(md1.pressureload(:,4));
223 end
224 md2.pressureload=md2.pressureload(find(md2.pressureload(:,1) & md2.pressureload(:,2) & md2.pressureload(:,end)),:);
225 end
226
227 %Results fields
228 if isstruct(md1.results),
229 md2.results=struct();
230 solutionfields=fields(md1.results);
231 for i=1:length(solutionfields),
232 %get subfields
233 solutionsubfields=fields(md1.results.(solutionfields(i)));
234 for j=1:length(solutionsubfields),
235 field=md1.results.(solutionfields(i)).(solutionsubfields(j));
236 if length(field)==numberofnodes1,
237 md2.results.(solutionfields(i)).(solutionsubfields(j))=field(pos_node);
238 elseif length(field)==numberofelements1,
239 md2.results.(solutionfields(i)).(solutionsubfields(j))=field(pos_elem);
240 else
241 md2.results.(solutionfields(i)).(solutionsubfields(j))=field;
242 end
243 end
244 end
245 end
246
247%Keep track of pos_node and pos_elem
248md2.extractednodes=pos_node;
249md2.extractedelements=pos_elem;
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