71 lines
2.1 KiB
Matlab
71 lines
2.1 KiB
Matlab
% Square:
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% flatpak run org.octave.Octave <filename>
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% or
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% octave --no-window-system --no-gui -qf <filename>
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clear all
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clc
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% %% L-shape
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% g=[2 0 2 0 0 1 0; % #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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% 2 2 2 0 1 1 0;
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% 2 2 1 1 0.5 1 0;
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% 2 1 1 0.5 2 1 0;
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% 2 1 0 2 2 1 0;
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% 2 0 0 2 0 1 0]';
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%% square
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% g=[2 0 1 0 0 1 0; % #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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% 2 1 1 0 1 1 0;
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% 2 1 0 1 1 1 0;
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% 2 0 0 1 0 1 0]';
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%% 2 squares
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g=[2 0 1 0 0 1 0; % 1 #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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2 1 1 0 1 1 2;
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2 1 0 1 1 1 0;
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2 0 0 1 0 1 0;
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2 1 2 0 0 2 0; % 2 #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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2 2 2 0 1 2 0;
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2 2 1 1 1 2 0
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]';
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% %% 4 squares
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% g=[2 0 1 0 0 1 0; % 1 #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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% 2 1 1 0 1 1 2;
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% 2 1 0 1 1 1 3;
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% 2 0 0 1 0 1 0;
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% 2 1 2 0 0 2 0; % 2 #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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% 2 2 2 0 1 2 0;
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% 2 2 1 1 1 2 4;
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% % 2 1 1 1 0 2 1;
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% % 2 0 1 1 1 3 1; % 3 #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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% 2 1 1 1 2 3 4;
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% 2 1 0 2 2 3 0;
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% 2 0 0 2 1 3 0;
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% % 2 1 2 1 1 4 2; % 4 #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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% 2 2 2 1 2 4 0;
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% 2 2 1 2 2 4 0
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% % 2 1 1 2 1 4 3
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% ]';
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[p,e,t] = initmesh(g,'hmax',0.1);
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pdemesh(p,e,t)
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%% GH
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% output from <https://de.mathworks.com/help/pde/ug/initmesh.html initmesh>
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%
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% coordinates p: [2][nnode]
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% connectivity t: [4][nelem] with t(4,:) are the subdomain numbers
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% edges e: [7][nedges] boundary edges
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% e([1,2],:) - start/end vertex of edge
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% e([3,4],:) - start/end values
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% e(5,:) - segment number
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% e([6,7],:) - left/right subdomain
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ascii_write_mesh( p, t, e, mfilename);
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ascii_write_subdomains( p, t, e, mfilename);
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% tmp=t(1:3,:)
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