56 lines
1.5 KiB
Text
56 lines
1.5 KiB
Text
% 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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g=[2 0.00 1.00 0.00 0.00 1 0; % #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
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2 1.00 1.00 0.00 0.60 1 0;
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2 1.00 0.83 0.60 0.60 1 0;
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2 0.83 0.17 0.60 0.60 1 2;
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2 0.17 0.00 0.60 0.60 1 0;
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2 0.00 0.00 0.60 0.00 1 0;
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2 0.83 0.83 0.60 0.80 2 0;
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2 0.83 0.17 0.80 0.80 2 0;
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2 0.17 0.17 0.80 0.60 2 0;
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2
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]';
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[p,e,t] = initmesh(g,'hmax',0.1);
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%[p,e,t] = initmesh(g,'hmax',0.6);
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pdemesh(p,e,t)
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% pdemesh(p,e,t,"NodeLabels","on")
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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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% tmp=t(1:3,:)
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